Danny is a scuba diver and had a mission of exploring the shallow depth of Marianas Trench. What do you think will happen if he will not be equipped by a divers’ oxygen  tank as he descends to the shallow portion of the ocean?

Which phenomenon best illustrates Charles’ Law?

Records show that the incidence of tire explosion is high during the summer season. Which of the following gives the best explanation for this observation?

What happens to the volume of a gas if its temperature decreases while keeping a constant pressure?

The use of the following materials work under the principle of Boyle’s Law EXCEPT?

Consider a 1.0L container of Neon gas at 273 K and 1 atm. In which of the following conditions will the average kinetic energy increase?

                                     I. The temperature increased to 1000C.

                                   II. The temperature is decreased to 500C.

                                 III. The volume has decreased to 0.5L.

                                 IV. The number of moles of neon is doubled.

Which biomolecule is the main source of the body’s energy?

Which biomolecule is made of nucleotides and contains your DNA?

Which biomolecule work in cells for the structure, function, and regulation of the body's tissues and organs?

Which biomolecule are soluble in organic solvents and insoluble in polar solvents such as water?

What elements are common to all kinds of biomolecules?

You need a steady supply of amino acids in your diet to maintain a healthy body. To meet this need, you should make sure you eat enough of which class of biomolecule?

Which is/are TRUE about the Law of Conservation of Mass?

I. The mass of the reactants is equal to the mass of the product.

II. The number of atoms in the reactant is the same as the number of atoms in the product.

III. The number of moles in the reactants is the same as the number of moles in the product.

IV. The masses of the reactant and product are the same, but the moles are different.

Which chemical equation will have equal masses from the reactant and product side?

If I want to use a wire to hang my plants, which will last longer: an iron wire or a copper wire?  Why?

Complete the chemical equations with correct numerical coefficients to balance the equation.  

___CH4(g) + ___O2(g) → ___CO2(g) + ___H2O (g)

Complete the chemical equations with correct numerical coefficients to balance the equation.

____CaCO3(s) + ___ HCl(aq) → ___ CaCl2 (aq) +___ CO2(g) + ___ H2O(l)

Which is NOT TRUE about the Law of Conservation of mass?

In the equation 2FeSO4(s) + Heat → Fe2O3(s) +SO2 (g)+ SO3(g)

Magnesium has an oxidation state of +2 and oxygen has -2.What would be the product if these ions are combined?

What are the products derived from any combustion reaction?

If the products of a double displacement reaction are AgCl(s) + NaNO3(aq), the reactants must be ____.

What would be the other product for this equation: 2 HCl(aq) + Zn(s) → ZnCl2(aq) + ____?

In which situation does a chemical reaction is unbalanced?

When the concentration of reactant molecules is increased, the rate of reaction increases. Which of the following best describe this?

Which concentration of ethyl alcohol is better to use for disinfection?

Which of the following should be added in making bread to have a better dough?

Which of the following greatly affects chemical reaction in processing milk?

Which one of the following statements concerning rates of reactions is TRUE?

When will chemical reactions come to a stop?