3. Chemical Reactions

Given the reaction 2 H_2 + O_2 → 2 H_2O, what mass of O_2 (in grams) is required to produce 55.0 grams of H_2O?

How many oxygen atoms are present in 2.74 g of Al_2(SO_4)_3?

What is the first step in performing mass calculations for chemical reactions?

A reaction requires 0.50 mol of H2SO4. What is the minimum mass of H2SO4 (in grams) needed to provide this amount?

A tablet contains 0.500 g of NaHCO3. What volume of 0.1000 M stomach acid (HCl) could one tablet neutralize, assuming the reaction is NaHCO3 + HCl → NaCl + CO2 + H2O?

When 0.066 mole of sodium (Na) is completely reacted with water according to the equation 2 Na + 2 H_2O → 2 NaOH + H_2, how many moles of hydrogen gas (H_2) are produced?

Given the reaction: CaC2 + 2 H2O → C2H2 + Ca(OH)2, how many grams of H2O are required to produce 13.0 g of C2H2?

How many milliliters of 0.100 M HNO3 are required to completely neutralize 25.0 mL of 0.150 M NaOH?

In the reaction between NaOH and H2SO4, how many moles of NaOH are required to completely react with 38 moles of H2SO4?

How many formula units of Na_2SO_4 are present in a 450 g sample?

In the reaction 2 H2(g) + O2(g) → 2 H2O(g), how many liters of H2 gas at STP are required to produce 2 moles of H2O?

When one formula unit of CaCl_2 dissolves completely in water, how many individual ions are produced?

Hexane (C6H14) combusts according to the equation: 2 C6H14 + 19 O2 → 12 CO2 + 14 H2O. How many moles of hexane (C6H14) must burn to produce 18.4 mol of carbon dioxide (CO2)?

In the balanced chemical equation: P4O10 + 6 H2O → 4 H3PO4, what is the mole ratio of H2O to H3PO4?

When 20.0 g of propane (C_3H_8) is completely combusted in excess oxygen, how many grams of water (H_2O) are produced?