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The atomic weight of a newly discovered element is 110.352 amu. It has two naturally occurring isotopes. One has a mass of 111.624 amu. The other has an isotopic mass of 109.75 amu. What is the percent abundance of the last isotope (109.75 amu)?
The idea here is that each isotope will contribute to the average of the element proportionally to their respective abundance. Now, the key to this problem lies in how you...
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What is the average atomic mass of an element if, out of 100 atoms, 5 have a mass of 176 amu, 19 have a mass of 177 amu, 27 have a mass of 178 amu, 14 have a mass of 179 amu, and 35 have a mass of 180 amu?
The $"Average Atomic Mass"$ of an element is defined as "the weighted average mass of all naturally-occurring (occasionally radioactive) of the element." (and hence the name "average") [1] Dividing the...
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$CH_4$ is the chemical formula for methane. In order to produce a single molecule of methane, how many carbon (C) atoms are needed? Hydrogen atoms?
You have the one molecule of $CH_4$. How many carbons? How many hydrogens? Both quantities are $>=1$. While I couldn't do this rxn, we could certainly evaluate its thermodynamic parameters:...
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The reaction of methane and water is one way to prepare hydrogen: $CH_4(g) + H_2O (g) -> CO (g) + 3H_2(g)$ [Molar masses 16.04 18.02 28.01 2.02]. If you begin with 995 g of $CH_4$ and 2510 g of water, what is the maximum possible yield of $H_2$?
Balanced Equation $"CH"_4("g") + "H"_2"O(g)"$$rarr$$"CO(g)" + "3H"_2("g")"$ This is a limiting reactant problem. We will determine whether methane or water is the limiting reactant. The limiting reactant will give us...
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Would mixtures of the following species be mutually soluble: $(i)$ potassium chloride, and methane; $(ii)$ $KCl$, and carbon tetrachloride; $(iii)$ potassium chloride, and water; $(iv)$ methane, and carbon tetrachloride; $(v)$ methane, and water?
$"1. Potassium chloride and methane"$, a volatile hydrocarbon, and an ionic solid. NOT MUTUALLY SOLUBLE. $"2. Potassium chloride and carbon tetrachloride"$, another (less) volatile hydrocarbon, and an ionic solid. NO....
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The mass of a hydrogen atom is 1.0 amu, and the mass of a carbon atom is 12.0 amu. What is the molar mass of methane?
Can you tell us the molar mass given that carbon has a molar mass of $12.0*g$, and hydrogen, $1.0*g$?
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How many moles of methane $CH_4$ are there in 80 grams of methane?
To find the number of moles, all we have to do is use the following relationship: $"Number of moles"$ $=$ $"Mass"/"Molar mass"$ And the molar mass of methane may be...
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A compound containing only carbon and hydrogen has a carbon-to-hydrogen mass ratio of 11.89. Which carbon-to-hydrogen mass ratio is possible for another compound composed only of carbon and hydrogen?
Trying to present a possible Answer We know that the molar mass of carbon and hydrogen are $C=12"g/mol" and H = 1"g/mol"$ When Carbon Hydrogen mass ratio is 11.89 The...
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For the reaction $C+2H_2 -> CH_4$, how many grams of hydrogen are required to produce 0.6 moles of methane, $CH_4$?
Start by determining ratio of $CH_4$ and $H_2$; it can be on these form and use the appropriate ratio depending on your desired unit; $(1 mol CH_4)/(2 mol H_2)$...
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Given the balanced equation representing the reaction between methane and oxygen: $CH_4 + 2O_2 -> CO_2 + 2H_2O$. According to this equation, what is the mole ratio of oxygen to methane?
$CH_4(g) + 2O_2(g) rarr CO_2(g) + 2H_2O(l)$ The equation explicitly tells us that one equivalent of methane gas reacts with two equiv of dioxygen to give one equiv of carbon...
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