IPAC: Midterm exam questions and verified solutions
An experiment is designed to determine if the amount of sugar in a drink affects the
likelihood that bees will be attracted to it. Sample A is 100 mL of pure water. Sample B is 100
mL of water with 1 gram of sugar dissolved in it. Sample C is 100 mL of water with 2 grams
of sugar dissolved in it.
All samples are placed on a picnic table. One observer is assigned to each drink. The
observers count the number of bees that visit the drink during a 15-minute interval.
Which of the following is the best hypothesis for this experiment? - If the amount of sugar in
a drink increases, then the number of bees it attracts will increase.
In the above experiment, which factor is the independent variable? - the amount of sugar in
the sample
Make the following conversion.
0.080 mL = _____ L - 0.000080 L
Use the ruler to determine the length of the line measured to the correct degree of precision.
- 13.25 cm
What is the volume of the fluid in this graduated cylinder measured to the correct degree of
precision? - 41.5 mL
Determine the mass of the object below to the correct degree of precision. - 105.65 g
Which of the following scientists used atomic spectra to develop a model of the atom? - Niels
Bohr
Find similar atoms via a periodic table of elements - Oxygen (8), selenium(34), tellurium(52)
, Know atomic weight from an elemental square - 39.0983
Know atomic number from an elemental square - 19
Find the number of neutrons from an elemental square - 20
How many atoms? CaBr(2) - 3
What is the best name for CaBr(2)? - Calcium Bromide
You are presented with a mixture of iron beads and iron filings. How can you separate them?
- use a screen
The specific heat of silver is 0.06 cal/g(c). Fifty grams of silver will require ________ calories
to raise the temperature 1(c). - 3
An acid solution contains more _______ ions than _______ ions. - hydronium, hydroxide.
Heat input vs temperature graph _________. - the substance is in the liquid state.
Which state of matter contains the most energetic particles? - Plasma
Which family on the periodic table is least likely to enter into chemical reactions? - 18
Is the following chemical equation balanced? KCIO+ 20( 2 )? - no
Read if a nuclear reaction is balanced? - yes
The " scratch test " is used to determine the ____ of a material. - hardness
Which of the following would not be considered a polymer? - Quartz
An experiment is designed to determine if the amount of sugar in a drink affects the
likelihood that bees will be attracted to it. Sample A is 100 mL of pure water. Sample B is 100
mL of water with 1 gram of sugar dissolved in it. Sample C is 100 mL of water with 2 grams
of sugar dissolved in it.
All samples are placed on a picnic table. One observer is assigned to each drink. The
observers count the number of bees that visit the drink during a 15-minute interval.
Which of the following is the best hypothesis for this experiment? - If the amount of sugar in
a drink increases, then the number of bees it attracts will increase.
In the above experiment, which factor is the independent variable? - the amount of sugar in
the sample
Make the following conversion.
0.080 mL = _____ L - 0.000080 L
Use the ruler to determine the length of the line measured to the correct degree of precision.
- 13.25 cm
What is the volume of the fluid in this graduated cylinder measured to the correct degree of
precision? - 41.5 mL
Determine the mass of the object below to the correct degree of precision. - 105.65 g
Which of the following scientists used atomic spectra to develop a model of the atom? - Niels
Bohr
Find similar atoms via a periodic table of elements - Oxygen (8), selenium(34), tellurium(52)
, Know atomic weight from an elemental square - 39.0983
Know atomic number from an elemental square - 19
Find the number of neutrons from an elemental square - 20
How many atoms? CaBr(2) - 3
What is the best name for CaBr(2)? - Calcium Bromide
You are presented with a mixture of iron beads and iron filings. How can you separate them?
- use a screen
The specific heat of silver is 0.06 cal/g(c). Fifty grams of silver will require ________ calories
to raise the temperature 1(c). - 3
An acid solution contains more _______ ions than _______ ions. - hydronium, hydroxide.
Heat input vs temperature graph _________. - the substance is in the liquid state.
Which state of matter contains the most energetic particles? - Plasma
Which family on the periodic table is least likely to enter into chemical reactions? - 18
Is the following chemical equation balanced? KCIO+ 20( 2 )? - no
Read if a nuclear reaction is balanced? - yes
The " scratch test " is used to determine the ____ of a material. - hardness
Which of the following would not be considered a polymer? - Quartz
