water melts at 0°c. a student observes a liquid that melts at 10ºc. which conclusion can the student reasonably draw?(1 point)
Answers
The student can reasonably draw the conclusion that the observed liquid is not reaction water, then the substance cannot be water.
Water, as we know, melts at 0°C. This is an established fact and is quite common knowledge. If a student observes a liquid that melts at 10°C, they can conclude that the observed liquid is not water.
This is because water has a distinct melting point of 0°C, and anything that melts at a temperature higher than that cannot be water. Therefore, based on this observation, the student can conclude that the observed liquid is not water. This can be inferred from the fact that every substance has a specific melting point, and if the melting point of a substance is not the same as that of water, then the substance cannot be water.
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Related Questions
Please help, I'm confused and it's due very soon!
1. Draw the atomic structure of an atom of lanthanum with an atomic mass of 139 amu. Calculate the correct number of protons, neutrons, and electrons. Show the structure of the electrons within their shells.
2. Why is this rare earth metal used to store hydrogen fuel in electric-powered vehicles?
3. How can the periodic table be used to predict the reactive nature of lanthanum?
Answers
Answer:
1. Lanthanum-139 atom is the stable isotope of lanthanum with relative atomic mass 138.906348, 99.9 atom percent natural abundance and nuclear spin 7/2.
2. In fact, over 80% of electric cars sold globally utilized permanent magnet-based motors in 2019. These magnets are typically made with rare-earth materials such as neodymium and dysprosium, which have a very geographically constrained supply chain.
3. It is the second most reactive of the rare-earth metals after europium. Lanthanum oxidizes in air at room temperature to form La2O3. It slowly reacts with water and quickly dissolves in diluted acids, except hydrofluoric acid (HF) because of formation of a protective fluoride (LaF3) layer on the surface of the metal.
Explanation:
one way to analyze for the amount of phosphorus in a rock is to precipitate the phosphorus as mgnh4po4, which is then heated to tum it into mg2p2o7. what mass of mg2p2o7 will be obtained from a 2.087 g sample of a rock that contains 86.52% ca3(po4)2 (and no other source of phosphorus) if this analysis is done? hint: you will not be able to write an equation for this problem.
Answers
The mass of \(Mg_2P_2O_7\) that will be obtained would be 0.22 grams
Stoichiometric problemThe equation of the reaction is as below:
\(2MgNH_4PO_4 -- > Mg_2P_2O_7 + 2NH_3 + H_2O\)
The mole ratio of \(MgNH_4PO_4\) and \(Mg_2P_2O_7\) is 2:1.
2.087 g sample of \(MgNH_4PO_4\) contains 86.52% Ca3(PO4)2.
The actual amount of \(MgNH_4PO_4\) = 2.087 - (0.8652x2.087) = 0.2813 grams
Mole of 0.2813 grams \(MgNH_4PO_4\) = 0.2813/137.315 = 0.002mol
Equivalent mole of \(Mg_2P_2O_7\) produced = 0.002/2 = 0.001 mol
Mass of 0.001 mol \(Mg_2P_2O_7\) = 0.001 x 222.55 = 0.22 grams
In other words, the mass of \(Mg_2P_2O_7\) that will be obtained from a 2.087 g sample of a rock that contains 86.52% Ca3(PO4)2 would be 0.22 grams.
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Which statement is true for one molecule of sulfur trioxide?
A.
There are three atoms of sulfur and one atom of oxygen.
B.
There are three atoms of sulfur and three atoms of oxygen.
C.
There is one atom of sulfur and one atom of oxygen.
D.
There is one atom of sulfur and three atoms of oxygen.
Answers
The correct option is D, in sulfur trioxide there is one atom of sulfur and three atoms of oxygen.
Sulfur trioxide has a chemical formula \(SO_{3}\) which clearly signifies one atom of sulfur and three atoms of oxygen.
In the case of option B: three atoms of sulfur and one atom of oxygen, do not make the chemical composition \(SO_{3}.\) Hence option B is incorrect.
In the case of option C: one atom of sulfur and one atom of oxygen, do not make the chemical composition as \(SO_{3}.\). Hence option C is incorrect.
In the case of option D: one atom of sulfur and three atoms of oxygen, do not make the chemical composition \(SO_{3}.\) Hence option D is incorrect.
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be able to explain the chemistry behind the edta titrations. why do we need the buffer? why do we spike the samples with mgedta? write the reactions to help explain. o
Answers
A buffer is used to maintain a constant pH during the titration process for accurate results. Spiking the samples with MgEDTA helps to control the pH and provides a known concentration of EDTA for the titration.
EDTA titrations are commonly used in analytical chemistry to determine the concentration of metal ions in a solution. The principle behind this technique lies in the ability of EDTA to form stable complexes with metal ions. EDTA is a hexadentate ligand, meaning it can coordinate with a metal ion using six of its electron-pair-donating sites.
During the titration, a buffer solution is essential to maintain a constant pH. This is crucial because the formation of metal-EDTA complexes is pH-dependent. A slight deviation in pH can affect the stability of the complex and lead to inaccurate results. The buffer resists changes in pH by neutralizing any added acids or bases, providing a stable environment for the titration.
To ensure accurate measurements, the samples are spiked with MgEDTA. Spiking involves adding a known concentration of a standard compound to the sample. In this case, MgEDTA is added, which releases free EDTA in the solution. The purpose of spiking is two-fold: first, it helps control the pH by providing a known concentration of EDTA, and second, it allows for calibration and standardization of the titration method.
The reaction between EDTA and metal ions can be represented by the following general equation:
\(Mn^+ + EDTA = M(EDTA)^-\)
Where \(Mn^+\) represents the metal ion and\(M(EDTA)^-\) is the resulting metal-EDTA complex. The stability constant of the complex determines the equilibrium position, which is affected by pH.
Overall, understanding the chemistry behind EDTA titrations, the role of buffers, and the purpose of spiking samples with MgEDTA helps ensure accurate and reliable results in metal ion analysis.
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URGENT!!!
Which statement explains why an increase in molality increases the boiling point of a solution? The addition of solute decreases the solvent’s vapor pressure. A higher temperature must then be applied to overcome the change. The addition of solute increases the solvent’s vapor pressure. A higher temperature must then be applied to overcome the change. The addition of solute increases the solvent’s ability to boil. The solute’s molecules repel the solvent’s molecules, giving them higher binding energy and hence the need for higher temperature.
Answers
Answer:
the addition to solute decreases the solvent's vapor pressure. a temperature must then be applied to overcome the change
Explanation:
Answer:
long story short: A
Explanation:
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Answers
chlorine gas is bubbled through an acidified solution of potassium permanganate (chlorate ion is one product)
Answers
When chlorine gas is bubbled through an acidified solution of potassium permanganate, a chemical reaction occurs, resulting in the formation of chlorate ions as one of the products.
The potassium permanganate acts as an oxidizing agent, while the chlorine gas acts as a reducing agent. The acidified solution helps to facilitate the reaction by providing a suitable environment for the chemical reaction to take place. Chlorine gas is highly reactive and can undergo oxidation and reduction reactions, making it a useful chemical in many industrial applications. In this particular reaction, it reacts with the potassium permanganate to form chlorate ion, which has its own range of applications in various industries, including the manufacture of fertilizers, herbicides, and explosives. Overall, the reaction between chlorine gas and an acidified solution of potassium permanganate is a useful chemical process that has many industrial applications. It highlights the importance of understanding the properties of different chemicals and how they can be used in various processes to create new products.
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The r group or side chain of the amino acid serine is –ch2 -oh. The r group or side chain of the amino acid alanine is – ch3. Where would you expect to find these amino acids in a globular protein in aqueous solution?
Answers
Alternatively, it may be found in the active site of an enzyme, where it could participate in catalysis or binding to a substrate.
In a globular protein in aqueous solution, the location of the amino acids with –CH2-OH and –CH3 side chains or R groups would depend on the specific protein's structure and function. However, some general principles can guide us in predicting where we might find these amino acids. Since the –CH2-OH group in serine is polar and can form hydrogen bonds, it may be located on the surface of the protein, where it can interact with the aqueous environment. On the other hand, the –CH3 group in alanine is nonpolar and hydrophobic, which means it would likely be buried in the protein's interior away from the aqueous solvent. It may play a role in stabilizing the protein's tertiary structure by interacting with other nonpolar amino acids or by forming hydrophobic interactions with the protein's core. Overall, the location of these amino acids in a globular protein would depend on their unique properties and the protein's overall structure and function.
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Convert 6.7 x 1024 molecules of nitrogen dioxide into grams.
Answers
Answer:
510 g NO₂
General Formulas and Concepts:
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Reading the Periodic TableWriting CompoundsUsing Dimensional AnalysisExplanation:
Step 1: Define
6.7 × 10²⁴ molecules NO₂ (Nitrogen dioxide)
Step 2: Define conversions
Avogadro's Number
Molar Mass of N - 14.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of NO₂ - 14.01 + 2(16.00) = 46.01 g/mol
Step 3: Use Dimensional Analysis
\(6.7 \cdot 10^{24} \ molecules \ NO_2(\frac{1 \ mol \ NO_2}{6.022 \cdot 10^{23} \ molecules \ NO_2} )(\frac{46.01 \ g \ NO_2}{1 \ mol \ NO_2} )\) = 511.901 g NO₂
Step 4: Check
We are given 2 sig figs. Follow sig fig rules.
511.901 g NO₂ ≈ 510 g NO₂
What is the electronegativity periodic table?
Answers
The electronegativity periodic table is a chart that arranges elements according to their electronegativity, which is a measure of an atom's ability to attract electrons to itself. Electronegativity is a chemical property that reflects the relative tendency of an atom to draw electrons towards itself when it forms a chemical bond with another atom.
The electronegativity values are usually determined using the Pauling scale, which was developed by Linus Pauling and is widely used in chemistry. In this scale, the electronegativity of an element ranges from 0.7 for cesium to 4.0 for fluorine, with increasing electronegativity moving from left to right across a period and increasing as one moves down a group.
The electronegativity values can be useful in understanding chemical bonding and the behavior of molecules. For example, elements with high electronegativity values tend to form ionic bonds, while elements with low electronegativity values tend to form covalent bonds. Additionally, the electronegativity difference between two bonded atoms determines the type of bond, with larger differences indicating polar covalent bonds and smaller differences indicating nonpolar covalent bonds.
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*WILL GIVE BRAINLIEST*
An electron resides in the n=5 shell of a hydrogen atom. Relaxing to which shell will emit a photon of light that resides in the visible spectrum?
a. n=1
b. n=2
c. n=3
d. n=4
e. n=5
Answers
I believe the answer is B.) n=2
n
=
2
Explanation:
The first thing that you need to do here is to use the frequency of the emitted photon to calculate its wavelength.
As you know, frequency and wavelength have an inverse relationship described by the equation
ν
⋅
λ
=
c
−−−−−−−−
Here
ν
is the frequency of the photon
c
is the speed of light in a vacuum, usually given as
3
⋅
10
8
m s
−
1
Plug in your value to find
λ
=
3
⋅
10
8
.
m
s
−
1
6.90
⋅
10
14
s
−
1
=
4.348
⋅
10
−
7
how many grams of potassium chloride can be dissolved in 200g of water at 80 c
Answers
Approximately 91.6 grams of potassium chloride can be dissolved in 200g of water at 80°C.
At 80°C, the solubility of potassium chloride in water is approximately 45.8 grams per 100 grams of water. Therefore, to find out how many grams of potassium chloride can be dissolved in 200g of water at 80°C, we need to use a proportion.
45.8 grams of potassium chloride / 100 grams of water = X grams of potassium chloride / 200 grams of water
Solving for X, we get:
X = (45.8 grams / 100 grams) * 200 grams = 91.6 grams
Therefore, at 80°C, approximately 91.6 grams of potassium chloride can be dissolved in 200g of water.
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what are ion and there different types of ions
Answers
Answer:
An ion is formed by the loss or gain of electrons by an atom, so it contains an unequal number of electrons and protons. Example: Sodium ion Na+, magnesium ion Mg2+, chloride ion Cl–, and oxide ion O2–. There are two types of ions : cations and anion
Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters
Answers
The correct order of the increasing polarity of the analyte functional group isEthers < Esters.
The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters." The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.
To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.
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The work of anthropologists shirley lindenbaum, david simmons, and paul farmer serve as examples of applying anthropology to successfully address health-care problems around the world. Identify the techniques that these three anthropologists used in their work that helped them assist communities overcome debilitating health issues.
Answers
The techniques that helped these three anthropologists their work that helped them assist communities overcome debilitating health issues are:
language skillscommunity involvementWho are anthropologists?An anthropologist is described as a person engaged in the practice of anthropology.
Anthropology is said to be the study of aspects of humans within past and present societies.
The work of anthropologists like Shirley lindenbaum, david simmons, and paul farmer serve as examples of applying anthropology to successfully address health-care problems around the world. These three anthropologists had techniques used in their work their work that helped them assist communities overcome debilitating health issues. Such techniques include:
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5. find the concentration of 100.0 ml of hcl if 80.0 ml of 2.5 m naoh is required to neutralize the acid. a) how many moles of base were added to the beaker to neutralize the acid? b) how many moles of acid were originally in the beaker? c) using the original moles of acid and the original volume of acid in the flask, calculate the molarity of the hcl.
Answers
To find the concentration of HCl, we need to calculate the moles of base added to neutralize the acid, the moles of acid originally in the beaker, and then use these values to determine the molarity of HCl.
a) To find the moles of base (NaOH) added, we can use the formula:
Moles of NaOH = Volume of NaOH (in L) × Molarity of NaOH
Converting the volume to liters and using the given values:
Moles of NaOH = 0.080 L × 2.5 mol/L = 0.2 mol
b) Since the reaction is a 1:1 stoichiometric ratio between NaOH and HCl, the moles of acid (HCl) will be equal to the moles of base added. Therefore, there were also 0.2 mol of HCl originally in the beaker.
c) Now, we can calculate the molarity of HCl using the formula:
Molarity (M) = Moles of solute / Volume of solution (in L)
Given that the volume of the acid is 100.0 mL (or 0.100 L) and the moles of acid is 0.2 mol:
Molarity of HCl = 0.2 mol / 0.100 L = 2.0 M
Therefore, the molarity of the HCl solution is 2.0 M.
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Calculate the mass of a piece of metal if its volume is 2.3 cm’and density is .486 g/cm3.
<-- Round to 3 digits
and show correct
units
Answers
Answer:
1.12 g.
Explanation:
From the question given above, the following were obtained obtained:
Volume (V) of metal = 2.3 cm³
Density (D) of metal = 0.486 g/cm³
Mass (m) of metal =..?
The density of a material is simply defined as the mass of the material per unit volume of the material. Mathematically, it is expressed as:
Density (D) = mass (m) / volume (V)
D = m/V
With the above formula, we can easily calculate the mass of the metal as shown below:
Volume (V) of metal = 2.3 cm³
Density (D) of metal = 0.486 g/cm³
Mass (m) of metal =..?
D = m/V
0.486 = m/2.3
Cross multiply
m = 0.486 × 2.3
m = 1.12 g
Therefore, the mass of the metal is 1.12 g.
PLEASE HELP ME ASAPPPPPPPP!!!!!!!!! PLEASEEEEEEEEEEEEEEEEEEE
Calculate the number of grams in 50 molecules of methane (CH4). Use as molar masses
for H= 1.008 g/mol, and for C= 12.011 g/mol.
Answers
Answer:
3.1167
Explanation:
Find the molar mass of CH4 and divide the 50 grams by the molar mass
Which of the following ionic compounds is soluble in water?
a) NH4C2H3O2
b) AgCl
c) BaCO3
d) PbSO4
Answers
Among the given compounds, a) NH₄C₂H₃O₂ (ammonium acetate) is soluble in water.
So, the answer is A
This is because ammonium (NH₄⁺) and acetate (C₂H₃O₂⁻) ions form soluble compounds. On the other hand, b) AgCl (silver chloride), c) BaCO₃ (barium carbonate), and d) PbSO₄ (lead sulfate) are not soluble in water.
Silver chloride is an exception to the general solubility rule for chlorides, while barium carbonate and lead sulfate are exceptions to the general solubility rules for carbonates and sulfates, respectively. These compounds form precipitates in water due to the strong ionic bonds between their constituent ions.
Hence, the answer is A.
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Why is carbon used to date things that were once living?
O A. The half-life of carbon depends on age.
B. The amount of carbon is easy to measure.
C. Living things take in carbon from food.
D. Carbon is not toxic to living things.
Answers
Explanation:
Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon. ... The carbon-14 method was developed by the American physicist Willard F.
How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2? How many moles of mercury is produced?
Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the following reaction.
NH4NO3(s) ---> N2O(g) + H2O(l) How many grams of NH4NO3 are required to produce 33.0 g N2O? and How many grams of water are produced in this reaction?
Answers
Answer: 7.81 mol HgO (How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2?)
Explanation:
how much energy, in kj, is carried by one mole of photons of green light emitted by a fluorescent proflavine molecule at 514 nm?
Answers
To calculate the energy carried by one mole of photons of green light emitted by a fluorescent proflavine molecule at 514 nm, we'll use the energy formula: \(E = h * c /\lambda\) where E is the energy of a single photon, h is Planck's constant (\(6.626 *10^{-34} Js\)), c is the speed of light (\(2.998 * 10^8 m/s\)), and λ is the wavelength (514 nm).
First, convert the wavelength to meters:
\(514 nm = 514 * 10^{-9} m\).
Next, calculate the energy of a single photon:
\(E = (6.626 * 10^{-34} Js) * (2.998 * 10^8 m/s) / (514 * 10^{-9} m) = 3.872 * 10^{-19} J.\)
Now, to find the energy carried by one mole of photons, multiply the energy of a single photon by Avogadro's number (\(6.022 x 10^{23\)):
Energy per mole =\((3.872 *10^{-19 }J) * (6.022 * 10^{23}) = 233.0 kJ.\)
Thus, one mole of photons of green light emitted by a fluorescent proflavine molecule at 514 nm carries 233.0 kJ of energy.
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a stock solution of 1.00 m nacl is available. how many milliliters are needed to make 100.0 ml of 0.750 m
Answers
75 milliliters of stock solution are needed to make 100.0 mL of 0.750 M.
What is the stock solution?
To make a stock solution, weigh out the proper amount of a pure solid or measure out the proper amount of a pure liquid, put it in the right flask, and then dilute it to the desired volume.
NaCl stock solution is, S1 = 1.00 M.
NaCl is, S2 = 0.750 M.
NaCl is, V2 = 100 mL.
Consider, the required volume of NaCl stock solution to make the desired solution is, V1
According to the dilution law,
S1V1 = S2V2
Where, S1 = Initial strength, V1 = Initial volume, S2 = Final strength and V2 = Final volume.
So, 1.00 M *V1 = 0.750 M * 100 mL
V1 = ( 0.750 M * 100 mL) / 1.00 M = 75 mL
Therefore, 75 milliliters of stock solution are needed to make 100.0 mL of 0.750 M.
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According to Beer-Lambert law, the absorbance of dye such as crystal violet is proportional to its Select one: a. temperature b. concentration c. transmittance d. Van't Hoff Factor
Answers
Beer-law Lambert's states that a dye's absorbance is inversely proportionate to its concentration in cases like crystal violet.
The Beer-Lambert Law (also known as the Beer-Lambert-Bouguer Law) states that the absorbance of a dye such as crystal violet is directly proportional to its concentration. This means that as the concentration of the dye increases, the amount of light that is absorbed by the dye also increases. This law is important for measuring the concentration of a solution by measuring its absorbance of light. As the absorbance is directly proportional to the concentration, knowing the absorbance allows for the concentration to be calculated. Beer Lambert law, also known as the Beer-Lambert law of absorption, states that there is a linear relationship between the concentration of an absorbing species and the absorptivity of the material. In other words, the greater the concentration of a substance, the greater its ability to absorb light. This law is often used to measure and analyze the concentration of a particular substance in a given sample, such as the concentration of a dye in a solution.
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Urgent!
which element do you think has a greater mass? cadmium or zinc?
Answers
Answer:
zinc
Explanation:
Answer:
cadmium has a greater mass.
explanation:
zincs mass: 65.38
cadmiums mass: 112.411
2-2. (10 points) At the bottom of a flat, quiescent (i.e., no advection) lake there are solid deposits of manganese. Due to a change in redox conditions manganese is dissolving into the water and just above the manganese deposits the concentration is 60μg/L. The lake serves as a water source for the water treatment plant that does not currently have manganese treatment. The water system's goal is for manganese to remain below its detection limit of 2μg/L because manganese accumulation in the distribution system can lead to black water events. a) What is the dominate transport mechanism in the lake? b) The intake at the water treatment plant is 1ft from the lake bottom. How long does the water treatment plant have before it needs to start treating for manganese? Use equation 1−18 in Benjamin and Lawler that is provided for stagnant conditions. The diffusion coefficient for manganese is 6.88×10−6 cm2/s. c) As a temporary solution the water treatment plant plans to raise the water intake level so that it has 1 year to design and install a manganese treatment system. What minimum height above the lake bottom should the intake be raised?
Answers
The dominant transport mechanism in the lake is diffusion. The water treatment plant has a limited time before it needs to start treating for manganese, and the minimum height above the lake bottom for the water intake to provide one year for designing and installing a manganese treatment system needs to be determined.
Dominant transport mechanism: Diffusion is the main transport mechanism in the lake. This means that manganese is gradually diffusing from the solid deposits at the lake bottom into the water column.
Initial concentration: The concentration of manganese just above the deposits is given as 60 μg/L.Detection limit: The water treatment plant aims to keep the manganese concentration below the detection limit of 2 μg/L to prevent black water events.Time to start treating: To determine how long the water treatment plant has before it needs to start treating for manganese, we can use Equation 1-18 in Benjamin and Lawler, which is provided for stagnant conditions. The equation is:t = (L^2) / (4D)
where t is the time in seconds, L is the distance from the bottom (1 ft or 30.48 cm), and D is the diffusion coefficient of manganese (6.88×10^(-6) cm^2/s).
Calculation Plugging in the values into the equation, we can calculate the time it takes for manganese to reach the water intake level.
t = (30.48^2) / (4 × 6.88×10^(-6)) = 126,707 seconds
Converting seconds to days: 126,707 seconds ÷ (24 hours/day × 3600 seconds/hour) ≈ 1.47 days
Therefore, the water treatment plant has approximately 1.47 days before it needs to start treating for manganese.
Minimum intake height: To provide one year for designing and installing a manganese treatment system, the intake should be raised to a height where the time it takes for manganese to reach that level is one year.
t = (L^2) / (4D)
Rearranging the equation to solve for L:
L = √(4Dt)
Plugging in the values: L = √(4 × 6.88×10^(-6) cm^2/s × (1 year × 365 days/year × 24 hours/day × 3600 seconds/hour))
L ≈ 49.65 cm or 0.163 ft
The minimum height above the lake bottom that the intake should be raised to is approximately 0.163 ft.
The dominant transport mechanism in the lake is diffusion, where manganese is slowly diffusing from the solid deposits into the water column. The water treatment plant has approximately 1.47 days before it needs to start treating for manganese to maintain concentrations below the detection limit. To provide one year for designing and installing a treatment system, the intake should be raised to a minimum height of approximately 0.163 ft above the lake bottom.
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What is the formula for ammonium carbonite? How did you get it?
Answers
Answer:
(NH4)2CO3 is the formula !
Answer:
\((NH_4)_2CO_3\)
Explanation:
Ammonium carbonate is made by reacting ammonium sulfate, ammonium chloride, and calcium carbonate in a furnace.
What is the correct electron dot symbol for an alumminum atom in the ground state?
Answers
Answer: Aluminum is in group IIIA of the periodic table therefore it has three valence electrons. The symbol for aluminum is Al which will be surrounded by three dots. 2.
Explanation:
What change takes place in a substance as the molecular motion of that substance increases? Responses A. The substance changes from a liquid to a gas. A. The substance changes from a liquid to a gas. B. The substance changes from a gas to a liquid. B. The substance changes from a gas to a liquid. C. The substance changes from a liquid to a solid. C. The substance changes from a liquid to a solid. D. The substance changes from a gas to a solid.
Answers
The distance between atoms widens as their vibrations get more rapid. The substance's state of matter is determined by the movement and spacing of its particles. The thing grows or enhanced molecular mobility.
What causes molecules inside a substance to move differently?Because kinetic energy of a liquid's molecules rises as the temperature does. As a result, the molecules have more flexibility to travel across larger volumes as the forces that attraction between them are eventually overcome.
What is required to promote molecular motion?According to the gas kinetic theory, as a gas's temperature rises, the typical kinetic energy of its molecules rises, leading to more motion. This real gases equation PV=NkT predicts that the increased velocity will increase the gas's outer pressure.
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How are reflecting telescopes different from refracting telescopes?
Answers
Reflecting telescopes are preferred for scientific research because they are better suited for gathering large amounts of light and producing high-quality images. However, refracting telescopes are still popular for amateur astronomers and for viewing objects on Earth.
Reflecting telescopes are different from refracting telescopes because reflecting telescopes use mirrors, whereas refracting telescopes use lenses. The reflecting telescope was invented in 1668 by Sir Isaac Newton, and it has since become one of the most popular types of telescopes.
Reflecting telescopes use a mirror to gather and focus light, while refracting telescopes use a lens to do the same thing. Reflecting telescopes can be made much larger than refracting telescopes because it is easier to make large mirrors than it is to make large lenses. The mirror in a reflecting telescope is placed at the back of the telescope, and it gathers and reflects light back to a secondary mirror, which then reflects the light to the eyepiece. The eyepiece is where the observer looks through the telescope.In contrast, the lens in a refracting telescope is placed at the front of the telescope, and it gathers and bends light as it passes through. The lens focuses the light onto an eyepiece at the back of the telescope. Refracting telescopes are generally smaller than reflecting telescopes because of the difficulty of making large lenses.
Another difference between reflecting and refracting telescopes is the way they are constructed. Reflecting telescopes have a simple tube that houses the mirrors and eyepiece, while refracting telescopes have a more complex design with a long tube that contains the lens and eyepiece.
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