Question

NEED HELP QUICKLY!!!!! Calculate the mass of each substance. Show your work.

Answer 1

Answer:

Explanation:

Given data:

A) Moles of H₂O₂ = 7.00

Mass of H₂O₂ = ?

Solution:

Number of moles = mass/ molar mass

Now we will rearrange this formula:

Mass = Number of moles × molar mass

Mass =  7.00 mol × 34 g/mol

Mass = 238 g

B) Moles of NaOH = 5.60 mol

Mass of NaOH = ?

Solution:

Number of moles = mass/ molar mass

Now we will rearrange this formula:

Mass = Number of moles × molar mass

Mass =  5.60 mol × 40 g/mol

Mass = 224 g

C) Moles of Ca(CN)₂ = 0.780

Mass of Ca(CN)₂ = ?

Solution:

Number of moles = mass/ molar mass

Now we will rearrange this formula:

Mass = Number of moles × molar mass

Mass =  0.780 mol × 92.11 g/mol

Mass = 71.85 g