Question

What is the mass of 3.2 moles of h2O ?

Answer 1

The mass of 3.2 moles of H₂O is calculated by multiplying the number of moles by the molar mass of water, which is 18.015 g/mol, giving a total mass of 57.648 grams.

Step-by-step explanation:

The mass of 3.2 moles of H₂O can be calculated using its molar mass. The molar mass of water (H₂O) is 18.015 g/mol, calculated by summing the molar masses of each atom in the molecule: (1.0079 + 1.0079 + 15.999).

To find the mass, simply multiply the number of moles by the molar mass:

Mass = Moles × Molar Mass

Mass = 3.2 moles × 18.015 g/mol = 57.648 g

This result gives you the mass of water for the given moles.

Answer 2

`\boxed{\text{57.7 g} }`

Step-by-step explanation:

The first step is to calculate the molar mass of H₂O:

`\begin{array}{rcr}\text{2 H} & = & 2.02\\\text{1 O} & = & 16.00\\\text{TOTAL} & = & \mathbf{18.02}\\\end{array}`

So, 1 mol has a mass of 18.02 g.

Next you calculate the mass of 3.2 mol of H₂O

`\begin{array}{rcl}m & = & \text{3.2 mol H$_(2)$O} * \frac{\text{18.02 g H$_(2)$O}}{\text{1 mol H$_(2)$O}}\\ & = &\boxed{\textbf{57.7 g H$_(2)$O}} \\\end{array}`