A quality control chemist at dow chemical tried to determine purity of naoh using titration. He measured out 0. 500 g naoh sample and dissolved it in 20 ml water. 22. 5 ml of a 0. 500 mol/l hcl solution was used to reach the end point. Assume the impurity did not react with hcl, what is the % purity of this naoh sample?.

Vera is on her school's track and field team. in a practice long-jump competition against her teammates, she gets 5 points for landing over the farther line. she gets a total of 7 jumps and lands x times over the farther line and the rest of the times over the closer line. which of the following functions represents vera's total score? a. f(x)=10x b. f(x)=5x+35 c. f(x)=10x+5 d. f(x)=70-5x

Explain how you might determine the rate of weathering on a sample rock

Explain how earth is like a giant bar magnet. how is our magnetic field made?