This stadium can hold 100,000 or 1x10*5 people. The number of atoms in a grain of iron is about 1x10*18. Would you need 1x10*10 or 1x10*13 stadiums to hold the same number of people as the number of atoms in a grain of iron? Explain your answer.

What is the relation between concentration of reactants and the rate of chemical reaction?

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.