A chemist measures the amount of hydrogen gas produced during an experiment. She finds that 64.7 g of hydrogen gas is produced. Calculate the number of moles of hydrogen gas produced. Round your answer to 3 significant digits.

Amixture with the same composition throughout is!

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature

Why is it incorrect to balance a chemical equation by changing the subscripts? explain.