7. In a double covalent bond,

a. one atom has more than eight valence electrons.

b. one atom loses à pair of electrons.

c. two atoms shåre eight valence electrons.

d. two atoms share two pairs of electrons.

As electrons are passed through the system of electron carriers associated with photosystem ii, they lose energy. what happens to this energy?

We're does plants use their energy to make food

What is the mass of sodium (Na) in 50 grams of table salt (NaCl) ? Show your work.

PH is the a measure of the 1) concentration of hydrogen ions in solution 2) concentration of compounds in solution 3) concentration of OH - in solution

What happens if a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite?

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.