3. Chemical Reactions

How many grams of KOH are required to prepare 400 mL of a 0.350 M KOH solution?

In the reaction 2 H2 + O2 → 2 H2O, how many moles of water are produced when 4 moles of hydrogen gas react completely with excess oxygen gas?

In the reaction 2 H_2 + O_2 ightarrow 2 H_2O, how many moles of O_2 are required to react completely with 1.67 mol H_2?

In the balanced chemical equation for the synthesis of ammonia, what is the mole-to-mole ratio between nitrogen gas (N_2) and hydrogen gas (H_2)?

How many moles of carbon are present in 125.0 g of iron(III) carbonate (Fe2(CO3)3)?

When 10.0 g of glucose (C6H12O6) is completely combusted in excess oxygen, what is the total combined mass of carbon dioxide (CO2) and water (H2O) produced?

In the reaction 2 H_2 + O_2 → 2 H_2O, how many grams of oxygen gas (O_2) are required to produce 36.0 grams of water (H_2O)?

How many moles of water are produced when 58 g of oxygen gas (O_2) react completely with excess hydrogen according to the reaction: 2 H_2 + O_2 → 2 H_2O?

Given the reaction 2H2O + 2F2 → 4HF + O2, what mass of fluorine (F2) is needed to completely react with 3.6 grams of water (H2O)?

Calculate the mass of 4.50 × 10²⁵ O₃ molecules.

Ammonium nitrate (NH₄NO₃), a common fertilizer, is 35.0% nitrogen by mass. How much ammonium nitrate contains 1.25 kg of nitrogen?

How many grams of sodium carbonate, Na₂CO₃ contain 1.773 × 10¹⁷ carbon atoms?

Zeatin, a plant hormone, is known to have 5 nitrogen atoms in every molecule. Nitrogen makes up 33.8% of the mass of the molecule. What is the mass of one molecule in amu?

What is the formula mass of calcium nitrate, Ca(NO₃)₂?