The Chemist’s Classification of Matter CHECK YOUR NEIGHBOR Is the air in your house a homogeneous or a heterogeneous mixture?
Solutions CHECK YOUR NEIGHBOR
Water, H2O, has a formula mass of 18. How many moles of water are there in 18 grams of water?
A. Homogeneous, because it is mixed very well. B. Heterogeneous, because of the dust particles it contains. C. Homogeneous, because it is all at the same temperature. D. Heterogeneous, because it consists of different types of molecules.
A. B. C. D.
0.5 moles 1 mole 9 moles 18 moles
Solubility CHECK YOUR NEIGHBOR The amount of oxygen, O2, dissolved in the waters of the arctic ocean is greater, about equal to, or less than the amount of oxygen dissolved in warm tropical waters? A. B. C. D.
Greater than About equal Less than It depends
Soap and Detergents CHECK YOUR NEIGHBOR Soap attracts “grime” by which type of molecular interaction?
Chapter 12 Review CHECK YOUR NEIGHBOR
By mass, water is 88.88 percent oxygen. So why can’t we breathe water? The oxygen is bonded to hydrogen as water, which has different properties than the oxygen molecule O2
Purifying the Water We Drink CHECK YOUR NEIGHBOR Which of the following is not a method of disinfecting drinking water?
A. Dipole–dipole.
A. Chlorine gas
B. Induced dipole–induced dipole.
B. Boiling
C. Hydrogen bonding.
C. Aeration
D. Dipole–induced dipole.
D. Iodine tablets
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