Final Exam Study guide: Chem 110 | Physical
Chemistry | Latest Update | Questions and
verified Answers | 100 OUT OF 100 (Grade A)
True statement regarding a neutral element that has
isotopes.
they have the same number of protons but different number of neutrons
How many protons are found in 1 atom of 28Al
13
Which one(s) of the following list of molecules should have their charge written
out with their name:
1. Cu(NO2)2
2. Ca(NO2)2
3. Na(NO2)2
4. Fe(NO2)2
1 and 4
What is a possible molecular formula of C3H5O2
C12H20O8
Which of the following numbers has the greatest number of significant figures?
A) 0.5070 B) 0.20100 C) 418000
,D) 6.02 × 1024
B
Chemical or physical change?
liquid nitrogen evaporating
physical
Chemical or physical change?
Propane burning
Chemical
Chemical or physical change?
My car rusting
chemical
Chemical or physical change?
magnesium disssolving in an acid to produce a green solution
chemical
T or F
, if H melts at -159degreeC and boils at -152degreeC, it would be a liquid at -150degreeC
False
A student performs an experiment to determine the density of a sugar solution.
She obtains the following results: 1.41 g/mL, 1.39 g/mL, 1.42 g/mL, 1.40 g/mL.
If the actual value for the density of the sugar solution is 1.40 g/mL, which
statement below best describes her results?
her results are both precise and accurate
If 7.7 g of sodium reacts with 11.9 grams of chlorine, what is the mass of the
sodium chloride product?
19.6g
Which of the following statements is NOT true.
A) All interior zeros of a number are significant.
B) Trailing zeros behind a decimal are significant.
C) Exact numbers have no uncertainty (they have infinite number of sig. figs.)
D) Leading zeros are significant.
D
Five measurement of a 50 lbs. weight on a bathroom scale gave the following
Chemistry | Latest Update | Questions and
verified Answers | 100 OUT OF 100 (Grade A)
True statement regarding a neutral element that has
isotopes.
they have the same number of protons but different number of neutrons
How many protons are found in 1 atom of 28Al
13
Which one(s) of the following list of molecules should have their charge written
out with their name:
1. Cu(NO2)2
2. Ca(NO2)2
3. Na(NO2)2
4. Fe(NO2)2
1 and 4
What is a possible molecular formula of C3H5O2
C12H20O8
Which of the following numbers has the greatest number of significant figures?
A) 0.5070 B) 0.20100 C) 418000
,D) 6.02 × 1024
B
Chemical or physical change?
liquid nitrogen evaporating
physical
Chemical or physical change?
Propane burning
Chemical
Chemical or physical change?
My car rusting
chemical
Chemical or physical change?
magnesium disssolving in an acid to produce a green solution
chemical
T or F
, if H melts at -159degreeC and boils at -152degreeC, it would be a liquid at -150degreeC
False
A student performs an experiment to determine the density of a sugar solution.
She obtains the following results: 1.41 g/mL, 1.39 g/mL, 1.42 g/mL, 1.40 g/mL.
If the actual value for the density of the sugar solution is 1.40 g/mL, which
statement below best describes her results?
her results are both precise and accurate
If 7.7 g of sodium reacts with 11.9 grams of chlorine, what is the mass of the
sodium chloride product?
19.6g
Which of the following statements is NOT true.
A) All interior zeros of a number are significant.
B) Trailing zeros behind a decimal are significant.
C) Exact numbers have no uncertainty (they have infinite number of sig. figs.)
D) Leading zeros are significant.
D
Five measurement of a 50 lbs. weight on a bathroom scale gave the following
