Question 1 unsaved
each of the following are descriptions of physical properties except
...
Biology, 26.12.2019 05:31 genesis0523
Question 1 unsaved
each of the following are descriptions of physical properties except
question 1 options:
c. flammability
d. density
a. color
b. mass
question 2 (10 points) question 2 unsaved
in the phase of matter, atoms or molecules are held in a rigid structure. they are free to vibrate but cannot move around.
question 2 options:
a. gas
b. solid
c. plasma
d. liquid
question 3 (10 points) question 3 unsaved
all of the following are evidence that a chemical reaction has occurred except
question 3 options:
a. color change
b. formation of a precipitate
c. bubbles of gas
d. all of the above are evidence of a chemical reaction
question 4 (10 points) question 4 unsaved
an example of a homogeneous mixtures are vegetable soup and chocolate chip cookies.
question 4 options:
true
false
question 5 (10 points) question 5 unsaved
which of the following is an example of a pure substance?
question 5 options:
a. air
b. salt water
c. granite
d. aluminum
question 6 (10 points) question 6 unsaved
the proper iupac naming convention for the compound symbol 'ki' is
question 6 options:
a. potassium iodide
b. barium sulfide
c. potassium iodate
d. barium iodine
question 7 (10 points) question 7 unsaved
the 'law of conservation of matter' states that the mass of the products will always be more than the mass of the reactants within a chemical reaction.
question 7 options:
true
false
question 8 (10 points) question 8 unsaved
the following reaction is an example of
na + kcl → k + nacl
question 8 options:
a. single replacement
b. double replacement
c. decomposition
d. combination
question 9 (10 points) question 9 unsaved
michelle wants to quickly dissolve powdered drink mix into a pitcher of water. which is not a way she could increase the rate of dissolution?
question 9 options:
a. heating the mixture
b. stirring the mixture
c. breaking up the solute into smaller pieces
d. adding more powdered drink mix
question 10 (10 points) question 10 unsaved
a student determines that a piece of an unknown material has a mass of 5.854 g and a volume of 7.57 cm3. what is the density of the material?
question 10 options:
a. 1.30 g/cm3
b. 0.39 g/cm3
c. 1.55 g/cm3
d. 0.77 g/cm3
Answers: 2
Biology, 21.06.2019 20:00, nmoareah
Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis. b. the primary role of microbes on the planet involves causing disease in animals and humans. c. microbes produce vitamins in the intestines. d. microbes play a role in breaking down waste and decomposing dead organisms.
Answers: 1
Biology, 22.06.2019 07:00, kaperry
Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.
Answers: 3
Biology, 22.06.2019 16:30, kingyogii
Clara wrote the following hypothesis for an experiment about acidophilic bacteria. bacteria cells will stop dividing in a basic (alkaline) environment because of the high ph. which statement is the best way to restate the hypothesis so that it is more specific? growing acidophilic bacteria in some environments will cause the cells to stop dividing because of ph. if the ph of their environment is changed, acidophilic bacterial cell division will be affected. if the environment of acidophilic bacterial cells becomes alkaline, the bacteria will stop dividing. the more alkaline an environment, the less cell division will occur in bacteria.
Answers: 1
Biology, 22.06.2019 21:30, jaylanmahone223
Write a paragraph explaining how energy flows through an ecosystem using the following terms: energy pyramid, trophic level, producer, primary consumer, decomposer, sun, secondary consumer, and tertiary consumer. .
Answers: 1
Mathematics, 08.12.2020 02:10