How much solute will remain undissolved when 180 g of potassium iodide is added in 100 cm3 of water at 30°C?

Answer:

196J, but C. at 200 J comes close.

Explanation:

Potential energy due to gravity is given by:

PEgrav = mass • g • height

where g is the acceleration due to gravity.  We'll use 9.8 N/kg (on Earth).

PEgrav = mass • g • height

PEgrav = (2 kg) • (9.8 N/kg) • (10 m)

PEgrav = 196 N*m

1 N*m = 1 Joule

PEgrav = 196 J

C. at 200 J comes close.  The solution probably used a value of g equal to 10 N/kg)

Answer:

20 J

Explanation:

Answer:

B

Explanation:

Trust me I've had problems like these

The specific heat of olive oil (2 J/g·°C) is less than that of water (4.18 J/g·°C). This indicates that olive oil requires less heat energy to raise its temperature compared to an equal mass of water.

To describe the specific heat of olive oil compared to water, we can use the given information that it takes approximately 420 J of heat to raise the temperature of 7 g of olive oil by 30°C.

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of 1 gram of the substance by 1 degree Celsius (or Kelvin).

In this case, we can calculate the specific heat of olive oil by dividing the amount of heat (420 J) by the mass (7 g) and the temperature change (30°C):

Specific heat of olive oil = (Amount of heat)/(Mass * Temperature change)

                          = 420 J / (7 g * 30°C)

                          ≈ 2 J/g·°C

Comparing this specific heat value to the specific heat of water (which is approximately 4.18 J/g·°C), we can conclude that the specific heat of olive oil (2 J/g·°C) is less than the specific heat of water. This means that olive oil requires less heat energy to raise its temperature compared to an equal mass of water.

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How can you describe the specific heat of olive oil compared to water if it takes approximately 420 J of heat to raise the temperature of 7 g of olive oil by 30°C?

In the conditions found in a patient 10 hours after aspirin ingestion, where acidosis may be present, the H2CO3/HCO3- system may not work effectively as a buffer.

The effectiveness of the H2CO3/HCO3- system as a buffer depends on the pKa of the weak acid and the pH of the solution. In the case of a patient 10 hours after aspirin ingestion, the conditions may not be suitable for the H2CO3/HCO3- system to work effectively as a buffer.

Aspirin, or acetylsalicylic acid, is metabolized in the body to salicylic acid, which can cause acidosis and decrease the pH of the blood. This decrease in pH can shift the equilibrium of the H2CO3/HCO3- system, affecting its buffering capacity.

Explanation:

The H2CO3/HCO3- system acts as a buffer in the blood by maintaining a stable pH. Carbonic acid (H2CO3) is a weak acid that can dissociate into bicarbonate ions (HCO3-) and hydrogen ions (H+). The bicarbonate ions can act as a reservoir for H+ ions, preventing large changes in pH. The effectiveness of this buffer system is determined by the pKa of carbonic acid, which is around 6.1.

However, when aspirin is ingested, it undergoes metabolism in the body to salicylic acid. Salicylic acid can cause an increase in H+ ions and lead to acidosis, a condition characterized by a decrease in blood pH. Acidosis shifts the equilibrium of the H2CO3/HCO3- system towards the formation of more carbonic acid (H2CO3) and decreases the concentration of bicarbonate ions (HCO3-). As a result, the buffering capacity of the H2CO3/HCO3- system may be compromised, and it may not effectively maintain the pH within the desired range.

Therefore, in the conditions found in a patient 10 hours after aspirin ingestion, where acidosis may be present, the H2CO3/HCO3- system may not work effectively as a buffer. Additional medical intervention may be required to restore and maintain the appropriate pH balance in the body.

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Answer:

An element is made of atoms

Explanation:

Answer:

-1

Explanation:

Answer:

the process when crusts sink into the seafloor and go further into the mantle. When sediments are compacted and cemented together with the limestone and other rock particles at the ocean floor, a sedimentary rock is formed. ...

Explanation:

The number of protons defines an element. If you know the element, you automatically know the number of protons. The number of protons is the same as the atomic number. A list or periodic table of the elements sorted by atomic number will tell you the number of protons. Example Every oxygen atom has 8 protons.

The number of electrons equals the number of protons in the atom unless it is ionized. The number of electrons is usually considered equal to the number of protons. The number of neutrons depends on the element. These variations in neutron number are called isotopes of the element. Adding the number of protons and the number of neutrons gives the atomic mass. Atomic weights are usually given as numbers following the hyphen after the element name. Example: Oxygen-18. Atomic weights may appear in superscripts before element symbols. Ex 18O. To get the number of neutrons, simply subtract the number of protons from the atomic mass.

Oxygen 17 is oxygen so it has 8 protons and if it is uncharged it probably has 8 choices and 17–8 = 9 neutrons. Similarly, oxygen 18 has 8 protons, 8 electrons and 10 neutrons.

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The systematic name for the compound Ba(NO3)2 is barium nitrate. Barium nitrate is an inorganic salt with the chemical formula Ba (NO3)2. It is a colorless, odorless, and crystalline solid that is highly soluble in water. The compound is formed by combining one atom of barium and two ions of nitrate.

The name “barium” comes from the Greek word “barys,” which means “heavy,” and is a reference to its high density. The term “nitrate” refers to the polyatomic ion NO3-, which is composed of one nitrogen atom and three oxygen atoms. Barium nitrate is commonly used in pyrotechnics, as it is a powerful oxidizing agent that produces a bright green flame when ignited.

The systematic naming of inorganic compounds is based on the rules set out by the International Union of Pure and Applied Chemistry (IUPAC). The name of an ionic compound is composed of the cation name followed by the anion name. In the case of barium nitrate, “barium” is the name of the cation, while “nitrate” is the name of the anion.

Therefore, the systematic name for the compound Ba(NO3)2 is barium nitrate.

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The electron domain geometry of SCl2 is tetrahedral, and the molecular geometry is bent or V-shaped.

The electron domain and molecular geometries of SCl2 are as follows:

1. Electron domain geometry: To determine the electron domain geometry, first, draw the Lewis structure of SCl2. Sulfur (S) has 6 valence electrons, and each chlorine (Cl) has 7 valence electrons. So, there are a total of 20 valence electrons in the molecule. When you draw the structure, sulfur will be the central atom bonded to two chlorine atoms and have two lone pairs of electrons.

2. Molecular geometry: To determine the molecular geometry, consider only the bonded atoms and ignore the lone pairs. In the case of SCl2, there are two bonding pairs and two lone pairs on the central sulfur atom. Based on the VSEPR theory (Valence Shell Electron Pair Repulsion), the electron pairs will arrange themselves to minimize repulsion. The molecular geometry will be bent or V-shaped.

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Speed you will have to go from Chicago to Hackensack in 260 hours is 4.9Km/hr.

Given,

Time = 260 hours

distance between Chicago to Hackensack is 1277 km

So speed = 1277/ 260 = 4.9 Km/ hr

Therefore, speed required to go from Chicago to Hackensack in 260 hours is 4.9 Km/ hr.

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If two independent estimates of σ2 (variance) are close together, it suggests that the variability of sample means can be attributed to the true underlying population variance.

When conducting statistical analysis, researchers often estimate the population variance, σ2, using different samples. If the resulting estimates are relatively similar, it indicates that the observed variability in the is likely due to the true variability in the population. This implies that the samples are representative and that the estimated variance accurately captures the true variance. Conversely, if the estimates differ significantly, it suggests that other factors may be influencing the variability of the sample means, such as sampling bias or random fluctuations.

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Answer:

hi this is candy0993

Explanation:

do you need something?

Answer:

Friction is the force that opposes the motion of a solid object over another. There are mainly four types of friction: static friction, sliding friction, rolling friction, and fluid friction.

The possible pH range of the unknown substance based on the experimental outcome is between 7-8 and is therefore denoted as option A.

This is known as the power of hydrogen and it is used to measure the degree of acidity or alkalinity of a substance.

The color which was gotten during the experimental procedure in the laboratory were the shades of green which is between 7 and 8 using the hydrion paper which is therefore the reason why it was chosen as the correct choice in this type of scenario.

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The molecular ion peak indicates the molecular weight of the compound. In this case, the non-cyclic alkane has a molecular weight of 492. To determine the chemical formula, we need to know the number of carbon and hydrogen atoms in the molecule.

The formula for a non-cyclic alkane is CnH2n+2. The "+2" represents the two additional hydrogen atoms needed to satisfy the valency of carbon.
To find the number of carbon atoms in the molecule, we can divide the molecular weight by the atomic weight of carbon (12.01). 492/12.01 ≈ 41.
Therefore, the chemical formula for this non-cyclic alkane is C41H84.
n= 41 carbon atoms
y= 84 hydrogen atoms.

A non-cyclic alkane, molecular ion peak, and chemical formula.
If a non-cyclic alkane shows a molecular ion peak at m/z 492, you can determine the chemical formula using the general formula for alkanes, which is CnH(2n+2).
Step 1: Use the given molar mass (492) to create an equation.
12n + (2n+2)(1) = 492
Step 2: Simplify the equation.
12n + 2n + 2 = 492
Step 3: Combine like terms.
14n + 2 = 492
Step 4: Subtract 2 from both sides.
14n = 490
Step 5: Divide by 14 to find the number of carbon atoms (n).
n = 490 / 14
n = 35 carbon atoms
Step 6: Calculate the number of hydrogen atoms (y) using the alkane formula.
y = 2n + 2
y = 2(35) + 2
y = 70 + 2
y = 72 hydrogen atoms
So, the chemical formula for the non-cyclic alkane with a molecular ion peak at m/z 492 is CnHy, where n=35 carbon atoms and y=72 hydrogen atoms. Your answer: C35H72

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Answer:

Heat is the total kinetic energy of a system, and temperature is the energy that transfers from one object to another due to a difference in heat.

we find the energy to be approximately \(3.41 * 10^-19\) Joules is the answer.

To calculate the wavelength of a photon with a frequency of 61.7 MHz, we can use the formula: wavelength = speed of light / frequency. The speed of light is approximately\(3 * 10^8\) meters per second.

Converting the frequency to Hz (\(1 MHz = 10^6 Hz\)), we have \(61.7 * 10^6\)Hz.

Plugging these values into the formula, we get: wavelength =\((3 * 10^8 m/s) / (61.7 * 10^6 Hz).\)

Simplifying, we find the wavelength to be approximately 4.862 meters.

Now, to calculate the energy of a photon with a wavelength of 582.8 nm, we can use the equation: energy = Planck's constant × speed of light / wavelength.

Planck's constant is approximately \(6.63 * 10^-34\) Joule-seconds.

Converting the wavelength to meters (\(1 nm = 10^-9 m\)), we have \(582.8 * 10^-9 m.\)

Plugging these values into the equation, we get: energy =\((6.63 * 10^-34J·s) * (3 * 10^8 m/s) / (582.8 * 10^-9 m).\)

Simplifying, we find the energy to be approximately \(3.41 * 10^-19\) Joules.

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Answer:

Period

Explanation:

I believe your answer should be period.

I hope it helps! Sorry if it didn’t… Have a great day!

Layla~

The  true statement is, the leaving group ability of the heteroatom group determines the reactivity towards nucleophilic acyl substitution.

Nucleophilic acyl substitution describes a class of substitution reactions involving nucleophiles and acyl compounds.

Also, nucleophilic acyl substitution is a type of substitution reaction involving an acyl group and a nucleophile.

Thus, the statement that is true regarding nucleophilic acyl substitution is, the leaving group ability of the heteroatom group determines the reactivity towards nucleophilic acyl substitution.

Thus, in nucleophilic acyl substitution, a nucleophile displaces the leaving group, resulting in a carbonyl compound.

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Answer:

C.

Explanation:

Noble gases are stable and already have a full outter shell therefore don't tend to lose or gain any electrons.

Answer:

D

Explanation:

Because it is the responding variable because you are looking for the weight or the amoount of salt in the water.

The dependent variable in this experiment number of plants living in the water.

Given:

An experiment design to test the effect of salt on the number of plants that live in water

To find:

The dependent variable in the experiment.

Solution:

We have two variables:

S = Amount of salt in water

P = Number of plants living in the water

This is because the amount of salt present in water is irrespective of the plants living in the water.

This is because the number of plants living in the water is gets affected by the amount of salt present in the water.

The dependent variable in this experiment number of plants living in the water.

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The precipitate is collected, filtered, dried, and weighed.. The mass of the precipitate is 0.116 g.

Dissolved refers to a solute that is completely dissolved in a solvent, resulting in a homogeneous mixture. When a solute, such as a salt, is dissolved in a solvent, such as water, the molecules of each component are dispersed evenly throughout the mixture. This process can be reversed by evaporating the solvent, leaving the solute behind. The amount of solute that can be dissolved in a particular solvent is known as its solubility.

Mass of Al2(SO4)3= Mass of sample- Mass of precipitate
Mass of Al2(SO4)3= 1.68-0.116=1.564 g
Percent of Al2(SO4)3= (1.564/1.68)*100= 93.45 %

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Answer:

sorry neither me ..........

No atoms are lost or made during the chemical reaction so the total mass of the products is equal to the total mass of the reactants. In an atom, protons and neutrons contribute to the mass and since the number of them doesn’t change, the mass doesn’t either.

Plasma is a state of matter in which a gas has been ionized to the point where it contains a significant number of free electrons and positive ions.

In a plasma, the electrons are separated from their parent atoms or molecules and are free to move about. This creates a mixture of positively charged ions and negatively charged electrons, which collectively behave like a fluid rather than individual particles.

Plasmas can be created by heating a gas to high temperatures, subjecting it to a strong electromagnetic field, or by passing an electric current through it. Examples of natural plasmas include lightning, the aurora borealis, and the sun. Plasmas have unique properties and are used in a variety of applications, including fluorescent lighting, plasma cutting and welding, and in plasma TVs.

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The correct statements describing transition metal cations are: "Transition metal cations usually have electrons in d orbitals" and "Transition metal cations often do not follow the octet rule."

Transition metal cations are ions formed when a transition metal loses one or more electrons. These cations usually have electrons in d orbitals, as the d orbitals of transition metals are easily ionized. Additionally, transition metal cations often do not follow the octet rule, as they can form stable complexes with ligands through coordination bonding.

The statement "in order to achieve a noble gas electronic configuration, transition metal cations typically have charges as high as 12" is incorrect as the charges of transition metal cations can vary and do not necessarily need to be as high as 12. The statement "for transition metals, the cation charge is typically equal to the group number" is also incorrect as the charge of transition metal cations can vary depending on the number of electrons lost.

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Answer:

. For each metal that participated in a chemical change, write the type of metal it is, based on yourexamination of the periodic table.Answer: Ammonium Vanadate appears to be mostly a post transition metal. Manganese sulfate also hasmore post transition atoms than transition atoms. Iron nitrate is a transition metal. The cobalt nitrate is atransition metal. Copper nitrate is a transition metal. Zinc nitrate is also a transition metal.(5 points)3. Were there any metallic compounds that did not react with either the acid or the base? Write the type ofmetal, based on your examination of the periodic table.4. Make a general statement about the reactivity of the metals in this experiment.Answer: The transition metals in this experiment were all reactive when mixed with one of the twosubstances. The alkali and alkaline earth metals, however, did not react at all.

Explanation: