How many main types of chemical bonds are there?

The ph of carrots are 5.0 how it is classified a.acidic b.basic c.indicator d.neutral

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

0.09 moles of sodium sulfate in 12 ml of solution