Question

What is the mass of 7.00 mol of hydrogen peroxide (H₂O₂)?
0.206 g
0.389 g
126 g
238 g

Answer 1

Answer:

238.14

Explanation:

2 H + 2O

2(1.01) + 2(16.00) = 34.02

34.02*7 = 238.14

238.14

More information:

https://brainly.com/question/19747767

Answer 2

n=7mol , MH2O2= 34g/mol
-> m= n.M
-> 7x34= 238g