How many particles.....?

Question

How many particles in 0.30 mol NaCl ?

1.8 x 1029

1.8 x 1034

1.8 x 1023

1.8 x 1026

How many moles in 4.7 x 1024 atoms Cu?

1.6

7.8

9.5

2.2

How many moles in 8.30 x 1025 molecules H2O?

138

245

213

156

Answer 1

Favorite Answer

When you say 1.8 x 1029 do you mean 10^29? I think so.

Calculations are as follows:

.30 mol NaCl * 6.02x10^23 'things'/1mol = 1.8x10^23

4.7 x 10^24 atoms Cu * 1mol/6.02x10^23 = 7.8 mol Cu

8.30 x 10^25 molecules H2O * 1mol/6.02x10^23 = 1.38 mol H2O

Source(s): I'm an advanced chemistry student.

Answer 2

1.8E23 particles

7.8 moles

138 moles

Answer 3

1.8 x 1034

9.5

138