Which process is an example of an exothermic reaction?

What is the chemical formula for the compound formed between sodium and sulfur?

What are hydrocarbon?

For a bronze alloy, the stress at which plastic deformation begins is 277 MPa and the modulus of elasticity is 107 GPa.

To find the percent by mass of a compound if you are given the formula, divide the molar mass of that element in one mole of the compound by the total molar mass of the compound, multiplied by 100.

A substance that, when dissolved in water, produces a solution that conducts electric current very efficiently is called: a. a strong electrolyte b. none of these c. a weak electrolyte d. an electrical solute e. a strong ion

During the combustion of 2.00 g of coal, the temperature of 500 g of water inside the calorimeter increased from 25.0°c to 43.7°c. the specific heat of water is 4.18 j/g·°c. how much heat did the reaction generate?

Catalysts are substances that increase the rate of reaction but can be recovered unchanged at the end of the reaction. Catalysts can be classified as either homogeneous (same state as reactants) or heterogeneous (different state than reactants).

How many molecules are there in 79g of Fe2O3?

Which of the following elements is an alkall metal?

A student mixes 0.50 L of 0.0020 M Ba (NO3) 2 solution with 0.50 L of 0.0080 M Na2SO4 solution. Which equation shows the proper set-up to calculate molar concentration of Ba2 + ions in the new solution? (0.0020 M) (1 L) = (? M) (0.0020 M) (0.