In the reaction 2H2 + O2 → 2H2O, how many grams of water can be produced from 4 grams of hydrogen?
Practice Questions
1 question
Q1
In the reaction 2H2 + O2 → 2H2O, how many grams of water can be produced from 4 grams of hydrogen?
36 g
18 g
72 g
9 g
4 g of H2 = 2 moles. 2 moles of H2 produce 2 moles of H2O = 2 * 18 g = 36 g.
Questions & Step-by-step Solutions
1 item
Q
Q: In the reaction 2H2 + O2 → 2H2O, how many grams of water can be produced from 4 grams of hydrogen?
Solution: 4 g of H2 = 2 moles. 2 moles of H2 produce 2 moles of H2O = 2 * 18 g = 36 g.
Steps: 6
Step 1: Determine the molar mass of hydrogen (H2). The molar mass of hydrogen is approximately 1 g/mol, so H2 (which has 2 hydrogen atoms) has a molar mass of 2 g/mol.
Step 2: Calculate the number of moles of hydrogen in 4 grams. Use the formula: moles = mass (g) / molar mass (g/mol). So, moles of H2 = 4 g / 2 g/mol = 2 moles.
Step 3: Use the balanced chemical equation 2H2 + O2 → 2H2O to find the relationship between hydrogen and water. From the equation, 2 moles of H2 produce 2 moles of H2O.
Step 4: Since 2 moles of H2 produce 2 moles of H2O, we can conclude that 2 moles of H2 will produce 2 moles of H2O.
Step 5: Calculate the mass of water produced. The molar mass of water (H2O) is approximately 18 g/mol. Therefore, 2 moles of H2O = 2 * 18 g = 36 g.
Step 6: Conclude that from 4 grams of hydrogen, 36 grams of water can be produced.
