Answer :
Final answer:
To calculate the amount of water formed when hydrogen reacts with oxygen, we need to balance the chemical equation and determine the limiting reagent. Then, we can use stoichiometry to calculate the moles of water formed and convert it to grams.
Explanation:
To determine the amount of water formed when hydrogen reacts with oxygen, we need to first balance the chemical equation for the reaction. The balanced equation for the reaction is: 2H₂ + O₂ → 2H₂O.
Next, we calculate the moles of hydrogen and oxygen using their molar masses. The molar mass of hydrogen is 2 g/mol, and the molar mass of oxygen is 32 g/mol.
Using the given mass of hydrogen (4.8 g) and oxygen (38.4 g), we can calculate the number of moles of each element. The moles of hydrogen is 4.8 g ÷ 2 g/mol = 2.4 mol, and the moles of oxygen is 38.4 g ÷ 32 g/mol = 1.2 mol.
Since the balanced equation shows that the ratio is 2:1 for hydrogen and oxygen, we can see that there is an excess of hydrogen. Therefore, the limiting reagent is oxygen. Using the stoichiometry of the balanced equation, we can calculate the moles of water formed. The moles of water formed is 1.2 mol × 2 mol H₂O/1 mol O₂ = 2.4 mol H₂O.
Finally, we can convert the moles of water to grams using the molar mass of water, which is 18 g/mol. The mass of water formed is 2.4 mol × 18 g/mol = 43.2 g.
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Hello!
First, find the molar mass of hydrogen and oxygen. We'll use this to find out how many moles there are in 4.8 and 38.4 grams of hydrogen and oxygen (respectively). Note that a mole is 6.02x10²³ atoms/molecules.
Molar mass of hydrogen: 1.007 g/mol
Molar mass of oxygen: 15.999 g/mol
Now, find out how many moles are in the given quantities.
Hydrogen: 4.8 / 1.007 = 4.767 (about) moles
Oxygen: 38.4 / 15.999 = 2.4 (about) moles
Now, water is made of two hydrogen atoms and one oxygen. Since there is more oxygen than two hydrogens, divide 4.767 by 2 to see how many molecules can be made.
4.767/2 = 2.3835
Therefore, about 2.3835 moles of water would form.
To find the molar mass of this, find the molar mass of water. To do this, add together the molar mass of two hydrogens and one oxygen.
2 * 1.007 + 15.999 = 18.013
Now, multiply 18.013 by 2.3835.
18.013 * 2.3835 = 42.934 grams
Therefore, about 2.3835 moles or 42.934 grams of water would form.
Hope this helps!
