In the reaction 2H2 + O2 → 2H2O, how many grams of water are produced from 4 grams of hydrogen?
Practice Questions
1 question
Q1
In the reaction 2H2 + O2 → 2H2O, how many grams of water are produced from 4 grams of hydrogen?
18 g
36 g
54 g
72 g
4 grams of H2 is 2 moles (4 g / 2 g/mol). According to the equation, 2 moles of H2 produce 2 moles of H2O, which is 36 g (2 moles x 18 g/mol).
Questions & Step-by-step Solutions
1 item
Q
Q: In the reaction 2H2 + O2 → 2H2O, how many grams of water are produced from 4 grams of hydrogen?
Solution: 4 grams of H2 is 2 moles (4 g / 2 g/mol). According to the equation, 2 moles of H2 produce 2 moles of H2O, which is 36 g (2 moles x 18 g/mol).
Steps: 6
Step 1: Determine the molar mass of hydrogen (H2). The molar mass of hydrogen is approximately 2 grams per mole (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: Look at the chemical equation: 2H2 + O2 → 2H2O. This tells us that 2 moles of H2 produce 2 moles of H2O.
Step 4: Since we have 2 moles of H2, we will produce 2 moles of H2O.
Step 5: Determine the molar mass of water (H2O). The molar mass of water is approximately 18 grams per mole (g/mol).
Step 6: Calculate the mass of water produced. Use the formula: mass = moles x molar mass. So, mass of H2O = 2 moles x 18 g/mol = 36 grams.
