Which of the following is a chemical change?

A: boiling of water

B: melting a cube of ice

C: dissolving 10 grams of salt in water

D: splitting water into hydrogen and oxygen

Complex molecules are formed by the bond formation between monomers. Which process is being referred to in this statement? A.) Monomerization. b.) Polymerization. C.) Polymonomerization

Which of the following is the major regulator of oxygen consumption during oxidative phosphorylation? a. NADH b. NAD+ c. NADPH d. NADP+ e. ATP f. ADP g. O2 h. H20 i. CO2

When the products of a reaction have more energy than the reactants: the reaction is exothermic the reaction is endothermic the reactants gave up energy the H is positive

Is honey homogeneous or heterogeneous

The volume of a gas increases when its temperature increases because

When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers.

Which best identifies why the rusting of an iron nail in the presence of water and oxygen is in oxidation-reduction reaction

In the laboratory hydrogen gas is usually made by the following reaction:Zn (s) + 2HCl (aq) = H2 (g) + ZnCl2 (aq) How many liters of H2 gas, collected over water at an atmospheric pressure of 752 mmHg and a temperture of 21 Co, can made from 3.

Whats the answer i need to know to get my paper done and if i don't get done i will fail chemistry.

3. Hydrogen cyanide (HCN) is a colorless gas. It is poisonous and smells like almonds. Draw a Lewis structure for this compound, explain why you drew the Lewis structure the way that you did, and predict the shape of the molecule