Need ! calculate the mass of each substance. show your work.
a. 7.00 mil h2o2
b. 5.60 mol naoh
c. o.780 mol ca(cn)2

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

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.