MTLE CC EXAM WITH 100%
CORRECT ANSWERS
Unit of measurement that standardizes the amounts of different molecules, where
grams or molecules can be converted into this unit - ANS-moles
1 cm = how many meters? - ANS-1 x 10^-2 m
A __________ of a substance or particles is defined as exactly 6.02214076×10²³
particles - ANS-mole
1 dm = ? m - ANS-1 dm = 1 x 10^-1 m
1 mm = ? m - ANS-1 mm = 1 x 10^-3 m
1 µm = ? m - ANS-1 µm = 1 x 10^-6 m
1 km = ? m - ANS-1 km = 1 x 10^3 m
which is bigger, a km or m? - ANS-km
T or F: Chemical relationships and ratios between different compounds are determined
in grams or molecules - ANS-FALSE: determined in moles
If the molecular weight of Carbon is 12.011 grams, then how many moles are in 12.011
grams of C? - ANS-1 mol
T or F: A moles is equal to the molecular weight in grams of an element - ANS-True
What is a solution made of:
A- solute
B-solvent +solute
C-solvent
D-solute+ solution - ANS-B- solvent + solute
percent notation is expressed as: - ANS-parts per hundred
5% w/v NaCl means there is how much of each part? - ANS-5 grams NaCl/ 100 mL
solution
5% w/v NaCl means that how much NaCl is present in the solution? - ANS-5 grams
, In a v/v , what are the units of measurement? - ANS-(mL of solute/ mL of solution) x100
(grams solute/grams solution) x 100 = What percent notation? - ANS-%w/w
(mL of solute/ mL solution)x100 = What percent notation? - ANS-%v/v
(grams of solute/ mL solution)x100 = What percent notation? - ANS-%w/v
moles of solute/liters of solution (mol/L) = ? - ANS-Molarity (M)
Molarity is denoted by ____ while Molality is denoted by ___ - ANS-M, m
Unit of measurement of Molarity? - ANS-moles/L
Which measurement is volume dependent, meaning that temperature and pressure can
influence the value, Molarity or Molality? - ANS-Molarity (M)
Which measurement is NOT volume dependent, meaning that temperature and
pressure cannot influence the value, Molarity or Molality? - ANS-Molality (m)
moles solute/kg solvent - ANS-molality (m)
If I add 250 mL bleach to 3000 mL water, my solution volume is? - ANS-mL solute + mL
solvent = 250 mL bleach + 3000 mL water = 3250 mL solution
If I add 250 mL bleach to 3000 mL water, what is the % v/v? - ANS-(250 mL bleach)
/(3250 mL solution) x 100 = 7.69% bleach solution
If I add 250 mL bleach to 3000 mL water, what kind of percent notation will this be? -
ANS-v/v (mL solute/mL solution)
Normality is denoted by ___ - ANS-N
Normality formula - ANS-gram equivalents of solute/ liters of solution
What is a gEq? - ANS-gram equivalent= molecular weight/valence
Molarity x valence = ? - ANS-Normality
1 part/100 parts - ANS-pph (parts per hundred)
1 part/1,000,000 - ANS-ppm (parts per million)
1 part/1,000,000,000 - ANS-ppb (parts per billion)
CORRECT ANSWERS
Unit of measurement that standardizes the amounts of different molecules, where
grams or molecules can be converted into this unit - ANS-moles
1 cm = how many meters? - ANS-1 x 10^-2 m
A __________ of a substance or particles is defined as exactly 6.02214076×10²³
particles - ANS-mole
1 dm = ? m - ANS-1 dm = 1 x 10^-1 m
1 mm = ? m - ANS-1 mm = 1 x 10^-3 m
1 µm = ? m - ANS-1 µm = 1 x 10^-6 m
1 km = ? m - ANS-1 km = 1 x 10^3 m
which is bigger, a km or m? - ANS-km
T or F: Chemical relationships and ratios between different compounds are determined
in grams or molecules - ANS-FALSE: determined in moles
If the molecular weight of Carbon is 12.011 grams, then how many moles are in 12.011
grams of C? - ANS-1 mol
T or F: A moles is equal to the molecular weight in grams of an element - ANS-True
What is a solution made of:
A- solute
B-solvent +solute
C-solvent
D-solute+ solution - ANS-B- solvent + solute
percent notation is expressed as: - ANS-parts per hundred
5% w/v NaCl means there is how much of each part? - ANS-5 grams NaCl/ 100 mL
solution
5% w/v NaCl means that how much NaCl is present in the solution? - ANS-5 grams
, In a v/v , what are the units of measurement? - ANS-(mL of solute/ mL of solution) x100
(grams solute/grams solution) x 100 = What percent notation? - ANS-%w/w
(mL of solute/ mL solution)x100 = What percent notation? - ANS-%v/v
(grams of solute/ mL solution)x100 = What percent notation? - ANS-%w/v
moles of solute/liters of solution (mol/L) = ? - ANS-Molarity (M)
Molarity is denoted by ____ while Molality is denoted by ___ - ANS-M, m
Unit of measurement of Molarity? - ANS-moles/L
Which measurement is volume dependent, meaning that temperature and pressure can
influence the value, Molarity or Molality? - ANS-Molarity (M)
Which measurement is NOT volume dependent, meaning that temperature and
pressure cannot influence the value, Molarity or Molality? - ANS-Molality (m)
moles solute/kg solvent - ANS-molality (m)
If I add 250 mL bleach to 3000 mL water, my solution volume is? - ANS-mL solute + mL
solvent = 250 mL bleach + 3000 mL water = 3250 mL solution
If I add 250 mL bleach to 3000 mL water, what is the % v/v? - ANS-(250 mL bleach)
/(3250 mL solution) x 100 = 7.69% bleach solution
If I add 250 mL bleach to 3000 mL water, what kind of percent notation will this be? -
ANS-v/v (mL solute/mL solution)
Normality is denoted by ___ - ANS-N
Normality formula - ANS-gram equivalents of solute/ liters of solution
What is a gEq? - ANS-gram equivalent= molecular weight/valence
Molarity x valence = ? - ANS-Normality
1 part/100 parts - ANS-pph (parts per hundred)
1 part/1,000,000 - ANS-ppm (parts per million)
1 part/1,000,000,000 - ANS-ppb (parts per billion)
