Chemistry: Stoichiometry

Which of the following describes $A_r$ correctly?

Relative molecular mass is used for substances that exist as molecules. What is the similar term used for ionic compounds?

What is the $M_r$ of Lithium Oxide ($Li_2O$)? (Use $A_r$: $Li=7, O=16$)

Calculate the $M_r$ of Potassium Chloride ($KCl$). (Use $A_r$: $K=39, Cl=35.5$)

Which of these has the same $M_r$ as $CO_2$ ($44$)?

Calculate the $M_r$ of Potassium Sulfate ($K_2SO_4$). ($A_r$: $K = 39, S = 32, O = 16$)

Calculate the $M_r$ of Carbon Monoxide ($CO$). ($A_r$: $C = 12, O = 16$)

Calculate the $M_r$ of an unknown gas if $0.5$ moles of it weighs $22$ g.

Which of the following contains the same number of atoms as $14$ g of Nitrogen gas ($N_2$)?

A substance $Y_2$ has a relative molecular mass of $71$. What is the relative atomic mass of $Y$ and its identity?

If you double the number of moles of a sample, you also double the:

What is the molar mass of $CH_4$ ($C=12, H=1$)?

How many moles of atoms in total are in 1 mole of $NH_3$?

Which of the following is NOT a unit used in mole calculations?

Which of the following has a molar mass of approximately 58.5 g/mol?

What is the mass of 3 moles of Nitrogen atoms ($N$)? (Atomic mass $N=14$)

How many total moles of atoms are in 2 moles of $H_2O$?

Which of the following has the same number of atoms as $1.0$ mole of $H_2O$?

A compound contains $2.0$ moles of $X$ for every $3.0$ moles of $Y$. If the mass of $0.1$ mole of $X_2Y_3$ is $16$ g, what is the molar mass of the compound?

How many atoms of Oxygen are present in $9.0$ g of Water ($H_2O$)?

What is the mass of $1 \text{ mole}$ of $NaCl$? ($Na=23, Cl=35.5$)

How many molecules are in $0.5 \text{ moles}$ of $CO_2$?

What is the mass of $2 \text{ moles}$ of Neon ($Ne$)? ($Ne=20$)

If you have $3.01 \times 10^{23}$ atoms of Silver, how many moles do you have?

In the reaction $S + O_2 \rightarrow SO_2$, how many grams of Sulfur are needed to produce $16$ g of $SO_2$? ($S=32, O=16$)

Determine the number of moles of water in $1$ liter of water ($1000$ g). ($M_r$ of $H_2O = 18$)

Which gas at RTP would have the largest volume?

A $1.0\text{ dm}^3$ container is filled with $O_2$ gas at STP. If the $O_2$ is replaced by $CO_2$ gas at the same temperature and pressure, the mass of the gas in the container will:

What is the mass of $0.2\text{ moles}$ of ethanol ($C_2H_5OH$)?

How many moles of ions are produced when $0.1\text{ mol}$ of $Al_2(SO_4)_3$ dissolves in water?

A solution that cannot dissolve any more solute at a given temperature is called:

If a solution is labeled $0.9\% m/v$ saline, how many grams of salt are in $100\text{ mL}$ of the solution?

Which concentration unit is most likely to be used for a solid dissolved in a liquid?

If you double the amount of solute in a fixed volume of solution, the concentration will:

A $5\%\ (v/v)$ solution means that there are $5\ mL$ of solute in every:

What is the concentration in $m/V$ percentage if $12\ g$ of solute is in $80\ mL$ of solution?

A chemist needs to make $250\ mL$ of a $0.1\%\ (m/V)$ silver nitrate solution. How much silver nitrate is needed?

To get $2\text{ g}$ of a drug from a $0.4\%$ (m/v) solution, what volume is required?

In a $2.5\%$ (m/v) starch solution, how many grams of starch are in $200\text{ mL}$?

If a solution is labeled $25\text{ mg/mL}$ (m/v), what is the mass in grams of the solute in $0.4\text{ L}$ of solution?

What does (l) stand for in a chemical equation?

What is the symbol for Zinc?

How many total atoms are in $2CO_2$?

What is the symbol for Calcium?

If you have $2Fe_{2}O_{3}$, how many iron atoms and oxygen atoms are there respectively?

What is the correct formula for barium sulfate?

Which set of coefficients balances: $?C_{2}H_{6} + ?O_{2} \rightarrow ?CO_{2} + ?H_{2}O$?

What is the sum of all coefficients in the balanced equation for the combustion of Butane ($C_{4}H_{10}$)?

Balance: $Cu + HNO_{3} \rightarrow Cu(NO_{3})_{2} + NO + H_{2}O$. What is the coefficient of $HNO_{3}$ in the simplest whole-number ratio?

Which of the following is the correct formula for Manganese(IV) oxide?