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Which Group 16 element combines with hydrogen to form compound that has the strongest hydrogen bonding between its molecules?
You know the normal boiling point of water. The normal boiling point of hydrogen sulfide is $-60$ $""^@C$; that of hydrogen selenide is $-41.2$ $""^@C$; that of hydrogen telluride is...
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A compound is formed when 9.03 g Mg combines completely with 3.48 g N. What is the percent composition of this compound?
The formula for is $"% by mass" = "mass of a component"/"total mass" × 100 %$ You have $"9.03 g Mg"$ and $"3.48 g N"$, so $"total mass =...
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Hydrogen reacts with .771 g of carbon to form .90 g of a compound. What is the mass percent of hydrogen in the compound?
In order to find the of hydrogen in this compound, you must determine how many grams of hydrogen you'd get in $"100 g"$ of compound. In your case,...
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What is the percent composition of a carbon-oxygen compound, given that a 95.2 g sample of the compound contains 40.8 g of carbon and 54.4 g of oxygen?
And thus......... $"%C"=(40.8*g)/(95.2*g)xx100%=42.9%$. $"%O"=(54.4*g)/(95.2*g)xx100%=57.1%$. Why should the individual percentage sum to $100%$? Do they...... We can divide the elemental percentages by the atomic masses if we assume $100*g$ of unknown...
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An unknown compound has a percent composition of 52.10% potassium, 15.8% carbon, and 32.1% oxygen. The molar mass of the compound is 150.22 g/mol. What is the empirical formula and the molecular formula of this compound?
As is typical with these questions, we assume $100*g$ of unknown compound, and work out the MOLAR quantities of each element present: $" moles of C":$ $(15.8*g)/(12.011*g*mol^-1)=1.32*mol$ $" moles of...
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A sample of a compound analyzed in a chemistry laboratory consists of 5.34 g of carbon, 0.42 g of hydrogen, and 47.08 g of chlorine. What is the percent composition of this compound?
And thus $%C$ $=$ $(5.34*g)/(5.34*g+0.42*g+47.08*g)xx100%$ $=$ $10.1%$ I leave it to you to find $%H$ and $%Cl$. And of course the percentages must sum to $100%$. Why? Given these data,...
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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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If 60.2 grams of Hg combines completely with 24.0 grams of Br to form a compound, what is the percent composition of Hg in the compound?
$%Hg="mass of mercury"/"mass of mercury and bromine"xx100%$ $=(60.2*g)/(60.2*g+24.0*g)xx100%=??%$ In such a binary compound, if you have the percentage by mass of one component, you also have the percentage by mass...
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If 20.50g of Sn combine completely with 24.49g of Cl to form a compound, what is the percent composition of tin in the compound? What is the empirical formula of the compound?
The of tin in the compound will be equal to the ratio between the mass of tin and the mass of the compound, multiplied by $100$. $color(blue)("% Sn"...
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The atomic number of sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, how do you predict the molecular formula of the compound?
We thus predict that hydrogen sulfide would have a formula of $H_2S$, an analogue of the popular $H_2O$ molecule.
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