How to calculate the number of atoms, molecules, or ions

What term refers to the period of life from puberty to the end of the teenage years? A. adolescence B. geriatrics C. menopause D. young adulthood

A sample of hydrated calcium sulfate has a mass of 2.643 g. After dehydration, the sample has a mass of 2.090 g. What is the percent by mass of water in the hydrate?

A lava lamp contains a waxy substance and water which do not mix and a light bulb at the base as the bulb heats the waxy substance it rises near the top of the lamp the waxy substance cools and falls explain why this happens

How does rust serve as a preservative?

What is Halite's HCL Test?

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Semi-conductors have properties of both metals and non metals. which are two examples of metalloids

How do you determine the percent yield of a chemical reaction?

What is a property of a combustion reaction? A. Oxygen gas, O2, is a reactant. B. The products are simpler than the reactants. C. The reactants are simpler than the products. D. An uncombined element is on the reactant and product side.

For an endothermic reaction at equilibrium, the addition of a catalyst Group of answer choices causes no shift causes a shift to the right causes a shift to the left makes it an exothermic process