REVIEW J.U3L2-Chemical Equations Question Preview (ID: 58947)
Quiz Prep.
TEACHERS: click here for quick copy question ID numbers.
Pb(NO3)2 + 2NaI produces PbI2 + 2NaNO3. Your CLAIM?
a) The chemical properties of NaOH and Na3PO4 are similar, and the chemical properties of H3PO4 and H2O are similar.
b) Because Mg and O2 are both elements, no bonds were broken during the formation of MgO.
c) The chemical properties of Pb(NO3)2 and NaI differ from the chemical properties of PbI2 and NaNO3.
d) Mass is lost when 2Mg and O2 become 2MgO.
Which number completes the balanced chemical equation showing the process of rusting? 4Fe + 3O2 produces ____Fe2O3
a) 12
b) 4
c) 1
d) 2
3NaOH + H3PO4 produces Na3PO4 + 3H2O. Your CLAIM?
a) Na3PO4 is a product
b) MgO is a reactant
c) A total of five oxygen atoms are involved in the reaction.
d) H3PO4 shows that three atoms of oxygen are involved in the reaction.
When coal is burned, sulfur is released into the air, where it reacts with oxygen to produce sulfur dioxide and sulfur trioxide. Your CLAIM?
a) Sulfur dioxide and sulfur trioxide are the reactants in this change.
b) The identity of each reactant remains the same.
c) The products have different chemical properties than those of the reactants.
d) The products contain more sulfur atoms and fewer oxygen atoms than the reactants.
2C2H6 + 7O2 produces 4CO2 + 6H2O. Which substance is a product in this reaction?
a) ethane (C2H6)
b) carbon (C)
c) oxygen (O2)
d) water (H2O)
Solid magnesium, Mg, reacts with oxygen gas, O2, to form the solid magnesium oxide, MgO. Which is a balanced chemical equation?
a) Mg + O produces MgO
b) 2Mg + O2 produces 2MgO
c) Mg + O2 produces MgO2
d) Mg + 2O produces 2MgO
The chemical formula for hydrogen peroxide is H2O2. Explain what the letters and numbers in the chemical formula represent.
a) H represents hydrogen. O represents oxygen. The 2s indicate there are two atoms of hydrogen and two atoms of oxygen.
b) H represents happiness. O represents oxygen. The 2s indicate there are two atoms of happiness and two atoms of oxygen.
c) H represents hydrogen. O represents overjoy. The 2s indicate there are two atoms of hydrogen and two atoms of overjoy.
d) H represents home. O represents oven. The 2s indicate there are two atoms of home and two atoms of oven
The metal sodium (Na) and the gas chlorine (Cl2) react to form sodium chloride, known as table salt (NaCl). Why are the products different from the reactants?
a) no, the products are not always different from the reactants
b) atoms that make up the original substances are regrouped into different molecules with different properties
c) in chemistry, energy can be destroyed
d) it's silly to think that chlorine gas combines with a metal to make table salt
During photosynthesis, water and carbon dioxide react to form oxygen and glucose. Is it a valid CLAIM that the products differ from the reactants of photosynthesis? Y or N
a) YES, products differ from reactants in all chemical reactions
b) NO, products and reactants are the same, but with different numbers only
c) It's a trick question
d) No idea
When paper is burned, the mass of the remaining ash is less than the mass of the original paper. What is your CLAIM?
a) The ash has less volume than the paper.
b) The mass of the ash cannot be accurately determined.
c) Some of the matter is destroyed during the reaction.
d) Some of the products of the reaction were given off as a gas.
Play Games with the Questions above at ReviewGameZone.com
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 58947 in the upper right hand corner or click here.
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 58947 in the upper right hand corner or click here.
TEACHERS / EDUCATORS
Log In | Sign Up / Register
Log In | Sign Up / Register