The correct response to separate two liquids that form a solution is:
heating the liquids and letting one boil away first.
This process is known as distillation, which is effective for separating liquids with different boiling points.
Separating Mixtures Quick Check
1 of 41 of 4 Items
Question
A scientist is working in a lab and accidentally combines two liquids that quickly form a solution. Which process could be used to separate the two liquids?(1 point)
Responses
collecting one of the liquids with a spoon
collecting one of the liquids with a spoon
waiting for the two liquids to separate
waiting for the two liquids to separate
heating the liquids and letting one boil away first
heating the liquids and letting one boil away first
passing the liquids through a filter to collect one of them
passing the liquids through a filter to collect one of them
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11 answers
Which property could allow a student to easily separate sand and iron filings?(1 point)
Responses
magnetism
magnetism
solubility
solubility
melting point
melting point
boiling point
Responses
magnetism
magnetism
solubility
solubility
melting point
melting point
boiling point
The correct response is:
magnetism.
Iron filings are magnetic, while sand is not, allowing the student to easily separate the two using a magnet.
You are worried that a solid substance has dissolved in a beaker of water in a lab. What would be a way to separate the substance from the water?(1 point)
Responses
Boil the water away, leaving the substance behind in the beaker.
Boil the water away, leaving the substance behind in the beaker.
Use a magnet to draw out the solid substance from the water.
Use a magnet to draw out the solid substance from the water.
Pour the liquid along a rough surface that would catch the solid particles but not the water.
Pour the liquid along a rough surface that would catch the solid particles but not the water.
Pass the solution through a filter to let the dissolved substance separate.
Pass the solution through a filter to let the dissolved substance separate.
Responses
Boil the water away, leaving the substance behind in the beaker.
Boil the water away, leaving the substance behind in the beaker.
Use a magnet to draw out the solid substance from the water.
Use a magnet to draw out the solid substance from the water.
Pour the liquid along a rough surface that would catch the solid particles but not the water.
Pour the liquid along a rough surface that would catch the solid particles but not the water.
Pass the solution through a filter to let the dissolved substance separate.
Pass the solution through a filter to let the dissolved substance separate.
The correct response is:
Boil the water away, leaving the substance behind in the beaker.
This process allows the water to evaporate, leaving the solid substance behind. Note that if the substance has completely dissolved in water (creating a true solution), it cannot be separated by filtration or magnetism. However, if it is a soluble solid, boiling will effectively leave the solute once the water has evaporated.
A beaker contains a mixture of sand and salt. A student adds water to dissolve the salt. Which processes can be used to separate out the sand and salt?(1 point)
Responses
filtration to collect both the sand and the salt
filtration to collect both the sand and the salt
distillation to collect the sand and filtration to collect the salt
distillation to collect the sand and filtration to collect the salt
distillation to collect both the sand and the salt
distillation to collect both the sand and the salt
filtration to collect the sand and distillation to collect the salt
Responses
filtration to collect both the sand and the salt
filtration to collect both the sand and the salt
distillation to collect the sand and filtration to collect the salt
distillation to collect the sand and filtration to collect the salt
distillation to collect both the sand and the salt
distillation to collect both the sand and the salt
filtration to collect the sand and distillation to collect the salt
The correct response is:
filtration to collect the sand and distillation to collect the salt.
In this process, filtration is used to separate the undissolved sand from the saltwater solution, and then distillation can be used to evaporate the water, leaving the salt behind.
Product Rule of Exponents Quick Check
1 of 51 of 5 Items
Question
Which expression is correctly developed to use the Product Rule of Exponents?(1 point)
Responses
108⋅108
10 superscript 8 baseline times 10 superscript 8 baseline
327
32 superscript 7 baseline
(52)9
left parenthesis 5 squared right parenthesis superscript 9 baseline
62⋅73
6 squared times 7 cubed
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1 of 51 of 5 Items
Question
Which expression is correctly developed to use the Product Rule of Exponents?(1 point)
Responses
108⋅108
10 superscript 8 baseline times 10 superscript 8 baseline
327
32 superscript 7 baseline
(52)9
left parenthesis 5 squared right parenthesis superscript 9 baseline
62⋅73
6 squared times 7 cubed
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The expression that is correctly developed to use the Product Rule of Exponents is:
10^8 × 10^8.
The Product Rule states that when multiplying two numbers with the same base, you can add their exponents (e.g., \( a^m \times a^n = a^{m+n} \)). In this case, \( 10^8 \times 10^8 \) can be simplified using the rule.
Which of the following correctly used the Product Rule of Exponents to simplify the expression 1008⋅1007 ?(1 point)
Responses
20015
200 superscript 15 baseline
10015
100 superscript 15 baseline
10056
100 superscript 56 baseline
10,00015
Responses
20015
200 superscript 15 baseline
10015
100 superscript 15 baseline
10056
100 superscript 56 baseline
10,00015
The expression \( 10^{08} \cdot 10^{07} \) can be simplified using the Product Rule of Exponents, which states that you add the exponents when multiplying like bases. Thus:
\[ 10^{08} \cdot 10^{07} = 10^{(8+7)} = 10^{15}. \]
So, the correct response is:
100^15.
9 answers