Convert 0.0035 NaCl by mass into parts per million of NACL.

Answer 1

To convert a mass fraction to parts per million (ppm), we need to multiply by 1,000,000.

0.0035 NaCl by mass = 0.0035 x 1,000,000 = 3500 ppm NaCl.

Answer 2

Write the ratio in THREE ways.

Five students were asked if they had a cell phone.
Four said yes and one said no.
What is the rate of students who DO NOT have a cellphone to the students who DO have a cell phone?

Answer 3

Ratio of students who do NOT have a cell phone to those who do have a cell phone can be written in the following ways:

1. 1:4
2. 1/4
3. 25%