Descibe the probable causes of two mass extinctions.

True or false? The molar mass of a gas determines the amount of kinetic energy of the gas.

Which chemical reaction needs more energy to break bonds in the reactants

Matter is made up of small

Which statement describes a chemical reaction? Reactants form products when atoms change state. Products form reactants when atoms change state. Reactants form products when atoms are rearranged. Products form reactants when atoms are rearranged.

How many acidic H + ion is given by H3BO3 in aqueous solution? ... ?

Why did most scientists reject Wegner's theory for nearly a half century?

Define prediction and explain how it is used to formulate a hypothesis.

A group of organisms that breed and produce offspring that can breed. A. Species B. ecosystem C. Biodiversity

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of water? 0.22 m 72 m 7200 m 40 m

A battery is constructed based on the oxidation of magnesium and the reduction of cu2+. the initial concentrations of mg2 + and cu2 + are 1.2*10-4 m and 1.44 m, respectively, in 1.0-liter half-cells. how long can the battery deliver 5.