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 18:30
Describe the primary and secondary immune response in terms of speed and number of antibodies produced?
Answers: 3
Biology, 22.06.2019 03:00
Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.
Answers: 2
Biology, 22.06.2019 04:30
Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids
Answers: 1
Ascientist compares two samples of white powder. one powder was present at the beginning of an exper...
History, 04.10.2019 20:50
Geography, 04.10.2019 20:50
History, 04.10.2019 20:50
Mathematics, 04.10.2019 20:50
Mathematics, 04.10.2019 20:50
Geography, 04.10.2019 20:50
Biology, 04.10.2019 20:50
Advanced Placement (AP), 04.10.2019 20:50
History, 04.10.2019 21:00