What is hydrogen ion concentration of an acid solution whose PH is 3.4?​

56.16 gregor mendel was the first scientist to use statistics to analyze scientific data. before mendel's experiments, scientists believed that organisms acquired traits from their environment and passed them on to their offspring. after mendel's discoveries were accepted, scientists realized that traits passed to offspring were the result of genes being passed from parents to offspring. this is an example of pls

Which of the following describes the entropy change as a solution is made from a liquid and solid

0.0006510 kg has how many significant figures.