Calculate each of the following quantities:
(c) Number of H⁻ ions in 5.82 g of SrH₂
Answers
A number of H⁻ ions in 5.82 g of SrH₂ 0.064 moles or ions.
What is a mole?The mole is the smallest unit of the atom which use to represent how many atoms moles or molecules are used in a chemical process or in a chemical reaction which is always equal to 2.303 ×10²³ moles for one atom.
To calculate the mass of the number of H⁻ ions in 5.82 g of SrH₂ the formula will use is,
number of moles = mass / molar mass
molar mass of SrH₂ = 89.64
mass of H⁻ ions = 5.82 g
substituting the value in the equation,
number of moles = 5.82 g / 89.64
number of moles = 0.064 moles or ions.
Therefore, 0.064 moles or ions. is the amount (mol) of the compound in the number of H⁻ ions in 5.82 g of SrH₂
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Related Questions
when 51.8 and 67.5 are multiplied, the product has ____ significant figures, and when 51.8 and 67.5 are added, the sum has ____ significant figures.
Answers
when 51.8 and 67.5 are multiplied, the product has three significant figures, and when 51.8 and 67.5 are added, the sum has three significant figures.
The significant figures in multiplying 51.8 and 67.5:
51.8 × 67.5 = 3496.5 = 3.50 × 10^3
Now according to the rules of significant figures
All non-zero numbers and trailing zeros to the right of the decimal are significant. But 10 and power of ten like in this case its 3 are not significant. So the product has three significant figures.
The significant figures in adding 51.8 and 67.5:
51.8 + 67.5 = 119.5
Now, according to the rules of significant figures, all non-zero digits are significant figures. So the sum has 4 significant figures.
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11. A student must make a solution that contains 0.0465 moles of carbon dioxide (CO2). How may
grams of carbon dioxide should the student measure out to make the solution
Answers
Answer:
whats the answer i been trying to find it please
Explanation:
thanksss
gequal masses of water of 20 degrees c and 80 degrees c are mixed. what is the final temperature of the mixture (assuming no loss of energy from the system)? question 6 options: 40 degrees c 50 degrees c 60 degrees c 70 degrees c
Answers
The final temperature of the mixture will be 30⁰C
Since it is given that 50 gms of water at 20 ⁰ C and 50 gms of water at 40⁰ C are mixed. Since the masses of the liquid at different temperatures are the same, the answer is very easy and simple: average of 20⁰C and 40⁰C. that is 30⁰C.
the final temperature of the mixture =
= [ m1 * T1 + m2 * T2 ] / (m1 + m2)
= [ 50 gms * 20⁰ C + 50 gms * 40⁰C ] / (50+50)
= 3,000 / 100 = 30⁰C
In chemistry, we define the temperature of a substance as the average kinetic power of all of the atoms or molecules of that substance. No longer do all of the debris of a substance have identical kinetic strength. At any given time, the kinetic energy of the debris may be represented by means of a distribution.
Temperature performs a vital function in-hospital treatment (both humans and animals), food, beverages, and agriculture. Our average fitness is regularly reliant upon the temperature in lots of methods as nicely.
The SI unit of temperature as consistent with the global system of devices is Kelvin.
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Pure iodine (105 g) is dissolved in 325 g of CCl4 at 65 °C. Given that the vapor pressure of CCl4 at this temperature is 531 mm Hg, what is the vapor pressure of the CCl4–I2 solution at 65 °C? (Assume that I2 does not contribute to the vapor pressure.)
Answers
The vapor pressure of the CCl4-I2 solution at 65°C is 443 mm Hg.
The vapor pressure of the CCl4-I2 solution at 65°C can be calculated by using Raoult's law.
Raoult's law states that the vapor pressure of a solution is equal to the product of the mole fraction of each component in the solution and its vapor pressure as a pure substance.
Mathematically, it is represented as:
Ptotal = ΣP°iXi
where Ptotal is the total vapor pressure of the solution
P°i is the vapor pressure of the pure substance i
Xi is the mole fraction of substance i.
Let us calculate the mole fraction of CCl4 and I2 in the solution.
Mass of pure I2 = 105 g
Molar mass of I2 = 253.8 g/mol
Number of moles of I2 = 105 g/253.8 g/mol
= 0.4147 mol
Mass of CCl4 = 325 g
Molar mass of CCl4 = 153.8 g/mol
Number of moles of CCl4 = 325 g/153.8 g/mol
= 2.11 mol
Total number of moles in the solution = 2.11 + 0.4147
= 2.525 mol
Mole fraction of CCl4 = 2.11/2.525
= 0.835
Mole fraction of I2 = 0.4147/2.525
= 0.165
We are given that the vapor pressure of CCl4 at 65°C is 531 mm Hg.
P°CCl4 = 531 mm Hg
Using Raoult's law:
Ptotal = ΣP°iXi
Ptotal = P°CCl4 x XCCl4
Ptotal = 531 mm Hg x 0.835
Ptotal = 443 mm Hg
Therefore, the vapor pressure of the CCl4-I2 solution at 65°C is 443 mm Hg.
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1 of 20
0 0%
In what form (solid, liquid or gas) is crude
oil found?
Enter your answer
Answers
Answer:
Gas
Explanation:
Because Crude oil can usually be found in the ground as a liquid and in the air is gas can be kerosene.
a 125.0 mg sample of an unknown, monoprotic acid was dissolved in 100.0 ml of distilled water and titrated with a 0.050 m solution of naoh. the ph of the solution was monitored throughout the titration, and the data were collected. determine the ka of the acid and identify the unknown acid.
data-
volume of oh- added (ml), ph:
0, 3.09
5, 3.65
10, 4.10
15, 4.50
17, 4.55
18, 4.71
19, 4.94
20, 5.11
21, 5.37
22, 5.93
22.2, 6.24
22.6, 9.91
22.8, 10.2
23, 10.4
Answers
Answer:
33,666
Explanation:
is the dictionary definition of a word.
is the feeling or idea associated with a word.
Compare and contrast metallic and ionic bonds, including the element groups they are made of, the behavior of electrons, and their typical properties.
Answers
The Compare and contrast of metallic and ionic bonds is given below.
Ionic and metallic bonds take occur between positive and negative ions, whereas ionic bonds take place between positive ions and electrons. This is the main distinction between the two types of bonds.
Ions, which are made up of a positive and a negative ion, are created when two atoms exchange electrons. Atoms sharing electrons to form a molecule result in covalent bonds. Metal atoms shed their outermost electron to produce positively charged ions, which then form metallic bonds.
Metal ions are attracted to delocalized or free e, forming metallic connections as a result. whereas ionic bonds are created by electron transfer from one atom to another.
What is the similarity between metallic and ionic bonds?Similar to ionic bonds, where the removal of electrons results in the formation of ions, metallic bonds include the removal of electrons to create a sea of electrons.
Later, these electrons are used or shared by each and every atom, and in covalent bonds, two atoms share one electron. Consequently, metallic bonds resemble both ionic and covalent bonds.
Ionic and metallic solids differ significantly in that metallic solids contain metal atoms and free electrons while ionic solids mostly comprise cations and anions.
Additionally, metallic solids feature metallic bonds rather than the electrostatic attraction forces between cations and anions that exist in ionic solids.
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PLEASE HELP me create a fictional video game using at least 2 of the ecological roles. (roles to choose from: decomposer, detritivore, pollinator, and seed disperser) (PLS TYPE IT OUT, PLS PLS)
what to include:
-Your characters (include creative names)
-An explanation of how the game is played
-The story of the game
-How the game is won/lost
-Connect the definition of of the two roles with the game and/or how the game is won.
Write a paragraph with at least 7-10 sentences.
BTW ILL GIVE BRAINLIEST OR WHATEVER ITS CALLED!! PLEASE HELP MEE! DESPERATE! IVE BEEN STARING AT THE SCREEN AND CRYING LOLZ <3
Answers
Answer:
GOT YOU
Explanation:
Jotun (pollinator)
Norse(decomposer)
Its a point and click adventure game. Where you only have specific actions you can do with your mouse. The basic options are Inspect for notes or Pollinate pollinate the right plants to escape. Your goal and how to win is go through each level picking up the plants to pollinate leave the level. The only way to lose is if you are unable to find the right plants by a set amount of time. The story is your wife has been taken prisoner by Norse and you are alerted by this from a note. You go to a location and find a tower once you walk in the doors shut behind you and a screen appears saying "Get out of the room and to the top of the tower in an hour or she dies. Jotun escapes and gets to the top of the tower to find out his wife died long ago and Norse has been using her for food.
Is damp wood and ignition source?
Answers
Answer: An ignition source is a process or event which can cause a fire or explosion. Open flames, sparks, static electricity, and hot surfaces are all possible ignition sources. An explosion can occur when flammable gases or vapors in the air come in contact with an ignition source such as a spark.
Also can I plz get brainiest?
An object has a mass of 441 g and a volume
of 10 cm3. What is the density of the object
in g/cm3?
Answers
The density is the ratio of the mass to the volume. The density of the object is 44.1 g/cm³.
What is density?Density (ρ) is the quantitative measurement of the substance having grams of mass that are dissolved per cubic meter of the solution. The density is calculated as:
ρ = M ÷ V
Given,
Mass of the object = 441 gm
The volume of the object = 10 cubic meter
Density is calculated as:
ρ = 441 ÷ 10
= 44.1 g/cm³
Therefore, 44.1 g/cm³ is the density of the object.
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N₂(g) + 3H₂(g) 2NH₂(g)
(iv) Name the catalyst used in this industrial process.
Answers
Answer:
I catalyst promoter is the answer
if i take 2 tables two times per day with 300 tables how many days will my prescription last
Answers
Answer:
150
Explanation:
300 divided by 2
CaC2 + 2H2O → C2H2 + Ca(OH)2If 4.8 moles of CaC2 are consumed in this reaction, how many grams of H2O are needed?
Answers
The given reaction is already balanced, that is to say tha the number of atoms in the reactants matches the number of atoms in the products. In the reaction, we can see the relationship between CaC2 and H2O. For each mole of CaC2 two moles of H2O react.
So, if 4.8 moles of CaC2 are consumed the moles of H2O needed will be:
Mol of H2O = Mol of CaC2 x 2
Mol of H2O = 4.8 x 2 = 9.6 mol of H2O
Now, to calculate the grams of H2O we will use the following equation and the mass molar of H2O.
Mass molar of H2O =18.01 g/mol
\(\begin{gathered} \text{Mass of H2O=Mol of H2O }\times Mass\text{ molar of H2O} \\ \text{Mass of H2O = 9.6 mol }\times18.01\frac{\text{ g}}{mol} \\ \text{Mass of H2O = 172.9 g} \end{gathered}\)So, if 4.8 moles of CaC2 are consumed in this reaction, 172.9 g of H2O are needed
1. Which of the following is incorrect regarding enthalpy?
a. It has the symbol
b. It is measured in joules (J)
c. It is also known as heat content
d. It is the amount of kinetic or potential energy of a substance
Answers
For which one of the following reactions is ΔH°rxn equal to the heat of formation of the product?
A) N2 (g) + 3H2 (g) → 2NH3 (g)
B) (1/2)N2 (g) + O2 (g) → NO2 (g)
C) 6C (s) + 6H (g) → C6H6 (l)
D) P (g) + 4H (g) + Br (g) → PH4Br (l)
E) 12C (g) + 11H2 (g) + 11O (g) → C6H22O11 (g)
Answers
Option (b) is correct. In the reaction 1/2 N2 (g) + O2 (g) ---> NO2 (g), the ΔH°rxn is equals to the heat of formation of the product because ΔH° reactant is Zero.
The standard enthalpy of formation is defined as the change in enthalpy when one mole of a substance in the standard state that is 1 atm. of pressure and 298.15 K is formed from its pure elements under the same conditions. The standard enthalpy of formation is a measure of the energy released or consumed when one mole of a substance is created under standard conditions from its pure elements. Its totally depends upon the initial and final states of the system. The symbol of the standard enthalpy of formation is ΔHf.
The equation of standard enthalpy change of the reaction is,
ΔH°rxn = [n∑(ΔH°products - n∑(ΔH°reactants]
Where, Δ = A change in enthalpy
o = A degree signifies that it's a standard enthalpy change.
In the reaction, (1/2)N2 (g) + O2 (g) → NO2 (g)
here ΔH° of reactants is zero. so the ΔH°rxn is equals to the heat of formation of the product.
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How many liters of hydrogen are formed at 715 mmhg and 19.0 deg c if 12.8 g of al react according the following reaction: 2 al + 6 hci ---> 2 alcl3 + 3 h2
Answers
There are 0.017 mm volume hydrogen are formed at 715 mm hg and 19.0 deg c if 12.8 g of al react
The relationship between an object's mass and volume seems to be straightforward. The object's mass rises directly proportionately to its volume.
The given reaction is:
2 Al + 6 HCl → 2 alcl3 + 3 h2
It can be seen that, 3 mol of hydrogen is formed during the reaction.
Number of moles of hydrogen = 3
Mass = 12.8 g
d = 715 mmHg
Volume of hydrogen can be calculated as:
Density = mass /volume
Volume = mass / density
Put the values of given data in above expression.
Volume = 12.8 g / 715 mm hg
Volume = 0.017 mm
Thus, volume of the hydrogen will be 0.017 mm
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HELPPPPPPPPP!!!!....... Which statement best describes how chemical equations demonstrate conservation of mass?
A.
The number of reactants is the same as the number of products.
B.
The compounds are the same on each side of the reaction.
C.
The number of atoms of each element is the same on each side of the equation.
D.
The state of matter is the same on each side of the equation.Which details from the passage are emphasized in both the text and images?
Answers
Answer:
A. The mass of reactants is the same as the mass of products
Convert 1.27 moles of magnesium carbonate to formula units.
Answers
We have the number of moles of magnesium, now we will use the Avogadro number to determine formula units:
\(\text{Avogadro number = }6.022\text{ }\times10^{23}\)Avogadro number says that one mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). Does not matter which is the substance, always 1 mol will be 6.022 x 10^23 formula units.
We have 1.27 moles so we will have:
\(1.27\text{ mol }\times\text{ }\frac{\text{6.022}\times10^{23}fu\text{.}}{1\text{ mol}}\text{ =}7.65\text{ }\times10^{23}formula\text{ units}\)1.27 moles of magnesium are equivalent to 7.65 x 10^23 formula units
Suppose a solid object is fully immersed in a liquid, but B is larger than w. Is this possible at all
Answers
This problem is stating a situation in which a solid object is fully immersed in a liquid and the buoyant force is larger that its weight, so that you need to discuss whether this is possible or not.
In general terms, it is necessary to keep in mind that when the buoyant force is larger than its weight, the object will float. On the other side, when the buoyant force is smaller than the weight, then the object will sink.
It means that it could be possible to have this scenario under specific conditions. Now, the Archimedes' principle can be applied with the following version:
\(F_B+W>m_{obj}*a\\\\\rho _{fluid}*V*g+m_{obj}*g>m_{obj}*a\\\\\rho _{fluid}*V-m_{obj}>m_{obj}*a\)
It means that the object can move down the liquid if has a significant acceleration (could be external), even when the buoyant force is larger than the weight
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https://brainly.com/question/18103369https://brainly.com/question/14271593Atoms of a given element will have the same mass. A. True B. False
Answers
Answer:
True
Explanation:
6.
Which best represents a particle containing 28 protons, 26 electrons, and 34 neutrons?
A Fe2-
B
54
2+
28N;
C%2Fe2-
DSNi2+
Answers
Answer:
Ni^2+
Explanation:
The following data were obtained from the question:
Proton = 28
Electron = 26
Neutron = 34
Next, we shall determine the atomic number of the element.
Atomic number of an element is simply defined as the number of protons in the atom of an element.
Thus,
Atomic number = proton number
Proton = 28
Atomic number = proton number = 28
Atomic number = 28
Therefore, the element is Nickel since no two elements have the same atomic number.
Finally, we shall determine the charge on the Nickel atom as follow:
Proton = 28
Electron = 26
Charge on atom =
Charge on atom = Proton – Electron
Charge on atom = 28 – 26
Charge on atom = +2
Therefore, we can represent the Particle as Ni^2+
Which pair of diseases could both be treated effectively with antibiotics
A. athletes foot and flu
B. cholera and salmonella
C. flu and scurvy
D. malaria and rickets
Imma mark the correct answer brainliest
Answers
Answer:
cholera and salmonella
Explanation:
i believe so
what is it called when a plant produces an abundant life
Answers
Answer:
reproduction i would believe
Explanation:
if correct plz mark brainliest
Answer:
Reproduction :)
Explanation:
hope this helps
What are the products of the following equation?
Al2(SO4)3 + Ca3(PO4)2 ---> 2AlPO4 + 3CaSO4
Answers
what are all the possible chemical formulas for-
1. cadmium and fluorine
2. vanadium and arsenic
3. rhenium and oxygen
4. lead and sulfur
5.titanium and nitrogen
6.palladium and chlorine
7.iridium and carbon
8.chromium and phosphorus
Answers
Answer:
number 7 or 3,5
Explanation:
sana po makatulong po sa inyo
calculate the approximate mass of khc8h4o4 for the standardization of the naoh solution
Answers
The approximate mass of \(KHC_8H_4O_4\) for the standardization of a NaOH solution is 160.16 g.
The approximate mass of \(KHC_8H_4O_4\) (sodium hydrogen carbonate) for the standardization of a NaOH solution can be calculated using the molar mass of the compound.
The molar mass of \(KHC_8H_4O_4\) is 160.16 g/mol, and the mole ratio of KHC8H4O4 to NaOH in the standardization solution is 1:1. Therefore, the mass of NaOH required to react completely with the KHC8H4O4 can be calculated as follows:
mass of NaOH = moles of NaOH x molar mass of NaOH
mass of NaOH = 1 x 58.44 g/mol
mass of NaOH = 58.44 g
The approximate mass of \(KHC_8H_4O_4\) required for the standardization of a NaOH solution can be calculated as follows:
mass of \(KHC_8H_4O_4\) = moles of \(KHC_8H_4O_4\) x molar mass of \(KHC_8H_4O_4\)
mass of \(KHC_8H_4O_4\) = 1 x 160.16 g/mol
mass of \(KHC_8H_4O_4\) = 160.16 g
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what is the electron configuration for a neutral atom with five valence electrons
Answers
Answer:
pee
Explanation:
ppppppppppppppppppppppppppppppppppppp
A chemist prepares a solution of magnesium fronde (Mg) dy weighing out 1.19 mg of magnesium Nuoride into a 350. ml. volumetric flask and nming the
5
Rask to the mark with water.
Calculate the concentration in g/l. of the chemist's magnesium fuoride solution. Round your answer to 3 significant digits.
0
Х
?
Answers
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2. Explain how to determine the wavelength of a wave.
Type your answer here.
I
Answers
Answer:
Hope it helps:)
Explanation:
Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave. This means the longer the wavelength, lower the frequency. ...
To find the wavelength of a wave;
The wavelength is calculated from the wave speed and frequency by λ = wave speed/frequency, or λ = v / f.
where and how are chromosomes formed ? state their significance
Answers
Chromosomes are formed inside the nucleus of a cell. They carry genetic information and are responsible for traits and characteristics passed down from one generation to the next. Chromosomes play a crucial role in cell division, and chromosomal abnormalities can lead to a variety of genetic disorders.
Chromosomes are formed inside the nucleus of a cell. The number of chromosomes present in the cells is constant for a given organism, which is known as the chromosome number. The chromosomes in eukaryotic cells are formed by the condensation of chromatin fibers during cell division, and they carry genetic information in the form of genes. Chromosomes are significant for various reasons. The DNA present in chromosomes carries the genetic information necessary for the development, growth, and functioning of an organism. Chromosomes are responsible for traits and characteristics passed down from one generation to the next. In addition, chromosomes play a crucial role in cell division, ensuring that each daughter cell receives the correct amount of genetic information. Chromosomal abnormalities can lead to a variety of genetic disorders, including Down syndrome, Turner syndrome, and Klinefelter syndrome. Therefore, the formation and structure of chromosomes are important for understanding genetics and disease.For more questions on Chromosomes
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