Significant Figures - write the number of significant figures in the blank. 1. 53

2. 53.0

3. 0.053

4. 0.0503

5. 530

6. 530.

7. 530.0

8. 5030

9. 5030.

10. 5030.001

11. 5-300.001

Can someone me with these questions plz.

Which of the following statements about acidic water is true? a. acid has no effect on the h, o molecules. b. the solution contains a larger number of oh ions than h, o ions. c. the solution contains a larger number of h, o ions than qh ions. d. the solution contains an equal number of h, o ions and oh ions. none of the above e.

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)