Biology, 06.11.2019 22:31 sindy35111
Ascientist compares two samples of white powder. one powder was present at the beginning of an experiment. the other powder was present
at the end. she wants to determine whether a chemical reaction has occurred. she finds that neither sample bubbles or dissolves in water. she
measures the mass and volume of the solids. sample one has a volume of 45 cm and a mass of 0.5 g sample two has a volume of 65 cm and a
mass of 1.3 g. what should the scientist conclude?
oa. the samples have the same color, so no chemical reaction has occurred.
b. the two samples do not react with water, so no chemical reaction has occurred.
oc
the densities of the samples are different, so a chemical reaction has occurred.
d. the densities of the samples are the same, so no chemical reaction has occurred.
e the densities of the samples are different, so no chemical reaction has occurred.
Answers: 1
Biology, 21.06.2019 23:50
Differentiation of cells changes the nucleic information. true false
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Biology, 22.06.2019 05:20
Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean
Answers: 2
Ascientist compares two samples of white powder. one powder was present at the beginning of an exper...
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