In the reaction 2Ca + O2 → 2CaO for every 2 Ca you will need how much O2? a. 1 c. 3 b. 2 d. 4

Which describes the structure of a water molecule, H2O? It has two polar single bonds and a bent shape. It has two nonpolar single bonds and a bent shape. It has two nonpolar single bonds and a linear shape.

8th grade science by what process does carbon dioxide enter the ocean

In the first step of glycolysis, the given two reactions are coupled. reaction 1: glucose + P i ⟶ glucose - 6 - phosphate + H 2 O Δ G = + 13.8 k J / mol reaction 2: ATP + H 2 O ⟶ ADP + P i Δ G = - 30.

In an experiment, Theresa measured 15.00 mL of water. She must have used a flask that had markings every 25 mL. beaker that had markings every 20 mL. transfer pipet that had markings every 0.1 mL. graduated cylinder that had markings every 1 mL.

Calculate the number of moles of water lost. (Take the number of grams and convert to moles) The number of grams is 0.7g

A solid substance turns into a liquid. Which best describes this change?

List two things you know about nonrenewable energy

Does a mole of hydrogen have the same mass as a mole of oxygen? explain your answer.

A 0.500-L sample of H₂SO₄ solution was analyzed by taking a 100.0mL aliquot and adding mL of. After the reaction occurred, an excess of ions remained in the solution. The excess base required mL of for neutralization.

Ammonia can be prepared by the reaction of magnesium nitride with water. The products are ammonia and magnesium hydroxide. Write and balance the equation.