How many Elements are in the periodic table? (Trivia, I know this though)

Consider the hydrate FeSO4 • 7H2O. What is the percent by mass of water in the hydrate? % What is the percent by mass of the anhydrous salt in the hydrate? %

What is state symbols

Suppose a reaction was run that produces hydrogen gas and a sample of H2 (g) collected. As a result of the collection 145 ml of water is displaced.

Explain why atoms are neutral.

What happens when air is heated in a ball

Can somebody explain step by step how to solve decomposition reactions?

Which of the following statements are correct about the chemical reaction? H2 + O2 - > H2O2 versus 2 H2 + O2 - > 2 H2O? They are both balanced chemical equations. The two reactions are equivalent. The laws of thermodynamics apply to both.

What do chemists use to describe a chemical reaction

When you drop a sugar cube in a glass of water, at first the water doesn't taste sweet. Later, it tastes very sweet. Eventually, the water will taste equally sweet throughout. What term explains molecule movement to maintain a balance?

Using density what is the mass in grams of 150mL of a liquid with a density of 1.4 g/mL