How can we tell if water freezing is a physical reaction or a chemical reaction?

As a Ca atom undergoes oxidation to Ca2+, the number of neutrons in its nucleus (1) decreases (2) increases (3) remains the same

Which of these statements describes one way that a nonrenewable energy resource is obtained? A. Wind turbines are placed on a coastline. B. Trees are cut down in a forest. C. Water is dammed on a river. D. Uranium is mined from rock.

Is air a homogeneous mixture. true or false

An oxidation-reduction reaction involves the (1) sharing of electrons (2) sharing of protons (3) transfer of electrons (4) transfer of protons

What happens to an atom of sulfur (S) if it loses an electron? A. It becomes inert. B. It becomes a cation. C. It becomes an anion. D. It becomes a molecule

Calculate the specific heat of a metallic element if 50.0 g of the metal need 314 joules of heat energy to raise the temperature from 25°C to 50°C.

State the relationship between the number of electrons in a carbon-nitrogen bond and carbon-nitrogen bond energy

What are the characteristics of bones?

If 294 grams of FeS2 is allowed ti react with 176 grams of O2 according to the following equation how many grams of Fe2O3 are produced? FeS2 + O2 = Fe2O3 + SO2

Convert 3.57 moles of aluminum to grams