The greatest number of $N$ atoms is found in (a) $50.0 \mathrm{~g}$ $\mathrm{N}_2 \mathrm{O}$; (b) $17.0 \mathrm{~g} \mathrm{NH}_3$; (c) $150 \mathrm{~mL}$ of liquid pyridine, $\mathrm{C}_5 \mathrm{H}_5 \mathrm{~N}(d=0.983 \mathrm{~g} / \mathrm{mL}) ;$ (d) $1.0 \mathrm{~mol} \mathrm{~N}{ }_2$

A hydrocarbon mixture consists of $60.0 \%$ by mass of $\mathrm{C}_3 \mathrm{H}_8$ and $40.0 \%$ of $\mathrm{C}_x \mathrm{H}_y$. When $10.0 \mathrm{~g}$ of this mixture is burned, $29.0 \mathrm{~g} \mathrm{CO}_2$ and $18.8 \mathrm{~g} \mathrm{H}_2 \mathrm{O}$ are the only products. What is the formula of the unknown hydrocarbon?

A particular type of brass contains $\mathrm{Cu}, \mathrm{Sn}, \mathrm{Pb}$, and Zn. A $1.1713 \mathrm{~g}$ sample is treated in such a way as to convert the Sn to $0.245 \mathrm{~g} \mathrm{SnO}_2$, the $\mathrm{Pb}$ to $0.115 \mathrm{~g}$ $\mathrm{PbSO}_4$, and the $\mathrm{Zn}$ to $0.246 \mathrm{~g} \mathrm{Zn}_2 \mathrm{P}_2 \mathrm{O}_7$. What is the mass percent of each element in the sample?

Dimethylhydrazine is a carbon-hydrogen-nitrogen compound used in rocket fuels. When burned in an excess of oxygen, a $0.312 \mathrm{~g}$ sample yields $0.458 \mathrm{~g} \mathrm{CO}_2$ and $0.374 \mathrm{~g} \mathrm{H}_2 \mathrm{O}$. The nitrogen content of a $0.486 \mathrm{~g}$ sample is converted to $0.226 \mathrm{~g} \mathrm{~N}_2$. What is the empirical formula of dimethylhydrazine?

The greatest number of $\mathrm{N}$ atoms is found in (a) $50.0 \mathrm{~g}$ $\mathrm{N}_2 \mathrm{O}$; (b) $17.0 \mathrm{~g} \mathrm{NH}_3$; (c) $150 \mathrm{~mL}$ of liquid pyridine, $\mathrm{C}_5 \mathrm{H}_5 \mathrm{~N}(d=0.983 \mathrm{~g} / \mathrm{mL})$; (d) $1.0 \mathrm{~mol} \mathrm{~N}_2$.

Tell whether the below given statement is true or false :

The compound $\mathrm{C}_7 \mathrm{H}_7 \mathrm{NO}_2$ contains about twice the percent by mass of $\mathrm{N}$ as of $\mathrm{H}$

Tell whether the below given statement is true or false :

The compound $\mathrm{C}_7 \mathrm{H}_7 \mathrm{NO}_2$ contains about twice the percent by mass of $\mathrm{O}$ as of $\mathrm{N}$

Tell whether the below given statement is true or false :

The compound $\mathrm{C}_7 \mathrm{H}_7 \mathrm{NO}_2$ contains equal percents by mass of $\mathrm{C}$ and $\mathrm{H}$

Tell whether the below given statement is true or false :

The compound $\mathrm{C}_7 \mathrm{H}_7 \mathrm{NO}_2$ contains 17 atoms per mole

The compound $\mathrm{C}_7 \mathrm{H}_7 \mathrm{NO}_2$ contains (a) 17 atoms per mole; (b) equal percents by mass of $\mathrm{C}$ and $\mathrm{H}$; (c) about twice the percent by mass of $\mathrm{O}$ as of $\mathrm{N}$; (d) about twice the percent by mass of $\mathrm{N}$ as of $\mathrm{H}$.

Tell whether $\mathrm{NH}_3$ is an empirical or molecular formula.

Tell whether $\mathrm{NaCl}$ is an empirical or molecular formula.

Tell whether $\mathrm{N}_2 \mathrm{H}_4$ is an empirical or molecular formula.

Tell whether $\mathrm{N}_2 \mathrm{O}$ is an empirical or molecular formula.