What is indicated by a letter in parentheses after a chemical formula, such as (s)?
a) whether the reaction is fast or slow
b) the purity of the substance
c) the physical state of the substance
d) that the substance is a catalyst

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.

The term gas is limited to those substances that exist in the gaseous state at

What is the name for molecular compound n4o8?