what is the ka of an unknown weak acid ha, at 25°c, if the ph of a 2.5 × 10-2 m solution of the acid was measured and found to be 4.94?

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

How have the greenhouse gasses increased from the year 2000 to 2018

What are the advantages of using the metric system? designed as a decimal system making conversions simpler more accurate system of measurement has prefixes that correspond to an amount to use with all base units used by the entire scientific community