Water has the formula H₂O.Water can be made from the reaction of hydrogen and oxygen.If 2.0 g of hydrogen reacts fully with 2.0 g of oxygen,then _____ of water is made.

Question

Quizplus · Accepted Answer

The balanced chemical equation for the reaction of hydrogen and oxygen to form water is:

2H2 + O2 → 2H2O

From the equation, we can see that 2 moles of hydrogen (H2) react with 1 mole of oxygen (O2) to form 2 moles of water (H2O).

To find the mass of water formed, we need to calculate the number of moles of hydrogen and oxygen used, and then use the mole ratio from the balanced equation to find the number of moles of water formed.

Molar mass of hydrogen (H2) = 2.0158 g/mol
Molar mass of oxygen (O2) = 31.9988 g/mol

Number of moles of hydrogen used = 2.0 g ÷ 2.0158 g/mol = 0.992 moles
Number of moles of oxygen used = 2.0 g ÷ 31.9988 g/mol = 0.0625 moles

The limiting reactant in this case is oxygen, since there is less of it available to react. Therefore, the number of moles of water formed will be determined by the number of moles of oxygen used.

Using the mole ratio from the balanced equation, we can calculate the number of moles of water formed:

0.0625 mol O2 × (2 mol H2O / 1 mol O2) = 0.125 mol H2O

Finally, we can convert the number of moles of water formed to grams:

0.125 moles H2O × 18.0153 g/mol = 2.252 g

Therefore, the answer is C) 4.0 g (rounded to one decimal place).

Water Has the Formula H2O

Water Has the Formula H₂O