Which are the reactants in the following reaction?

2 Mg + O2 - --> 2MgO

a) Mg and O

b) Mg and MgO

c) MgO

d) O and MgO

Which of these elements is essential to making all organic molecules?

A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 126 g of solution. The reaction caused the temperature of the solution to rise from 21.00 to 24.70 ∘C.

11. If there are 8.24 x 1022 molecules of NaCl in a salt shaker, what is the mass of the salt? Answer: 8.00 a Nacl

Which of the following is the correct formula for the compound disulfur pentoxide

Which of the following you do NOT need to pay attention while using a centrifuge? Use the correct correct centrifuge tube Balance the centrifuge tube with the same amount of liquid Secure the centrifuge lid The radius of the centrifuge Use the

100 g of water and 100g of metal sample are heated from 25 to 75. which substance requires more thermal energy to reach 75c

A process or reaction which takes in heat from the surroundings is said to be

What is the volume of 0.05 mol of neon gas at STP?

Which is NOT a property of gold? A. rare B. tarnishes C. malleable D. corrosion resistant

The element rubidium has two naturally occurring isotopes. The atomic mass of 85Rb (72.17 percent abundant) is 84.911794 amu. Determine the atomic mass of 87Rb (27.83 percent abundant). The average atomic mass of Rb is 85.4678 amu.