Why is it important to balance a chemical equation before proceeding to answer questions about it?

Ineed ! it’s science and it’s due tomorrow!

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

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.