Which of the following is not a common use of gypsum? a. wallboard/drywall for homes b. a primary ingredient for toothpaste c. surgical splints and casts d. pH reducing agent for acidic soils

Why is a molecule the smallest part of a substance

Draw the structure of 6-bromo-2,3-dimethyl-2-hexene (also known as 6-bromo-2,3-dimethylhex-2-ene).

When baking soda and vinegar react, the product includes bubbles. what mostly likely occurred?

Given the equations below, what is the total enthalpy change for the formation of phosphorus pentachloride, PCl5, when phosphorus is burned in excess chlorine?

Hydrocarbons are organic compounds composed entirely of hydrogen and carbon. A 0.1647 g sample of a pure hydrocarbon was burned in a combustion apparatus to produce 0.4931 g of CO2 and 0.2691 g of water.

What do a Am radio, Fm radio, television and cell phones have in common. A.) they were all invented in the same year B.) they were all invented by the same scientist C.

Consider the reaction: 2 NO (g) + 5 H2 (g) → 2 NH3 (g) + 2 H2O (g) A reaction mixture initially contains 5 moles of NO and 10 moles of H2. Which set of amounts best represents the mixture after the reactants have reacted as completely as possible?

True or False: If you have 2 moles of water and 2 moles of carbon, you have the same number of molecules.

Balancing chemistry equations

How much energy, in joules, is released when 17 kilograms of granite is cooled from 45 C to 21 C?