Sodium hydroxide, naoh , is a strong base that is used im industrial synthesis and processes such as making paper. what is the mass of 2.90*10^22

1.926 g of NaOH

Concept tested: Mole and Avogadro's number

Therefore;

In this case; Our compound is NaOH

Therefore;

1 mole of NaOH contains 6.022 × 10^23 molecules

But; Molar mass of NaOH is 40.0 g/mol

Therefore;

With this we can calculate the mass of 2.90 × 10^22 molecules

Therefore;

Mass of NaOH =(2.90 × 10^22 molecules ÷ 6.022 × 10^23 molecules)40g

                        = 1.9263 g

                        = 1.926 g NaOH

Thus, the mass of NaOH is 1.926 g

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )