Kanija and Keegan are about to add 3 grams of magnesium (Mg) to a test tube of 30 grams of hydrochloric acid (HCl). They covered their container with a balloon as a seal. If the students expect a chemical change as well as evidence of the law of conservation of matter, choose ALL of the predictions that should apply? i. There will be a rapid evolution of a gas.
ii. The mass of the products will equal 33g.
iii. The solid magnesium metal will disappear.
iv. There will be a large change in temperature.
v. The balloon covering the container will expand.
A.
i and ii

B.
i and iii

C.
iii, iv and v

D.
i, ii, iii, and v

E.
i, iii, iv, and v

Select the statements that apply in order to complete the model.

i. The products must equal the reactants.

ii. One diatomic oxygen should be removed from the reactant side.

iii. One unbonded carbon atom should be added to the product side of the equation.

iv. One carbon atom and two oxygen atoms are needed to balance the equation.

v. One carbon dioxide molecule should be added to the product side of the equation.

A.
i and ii

B.
iii and iv

C.
i, iv and v

D.
i, iii and iv

E.
ii, iii and iv