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stepan [7]
4 years ago
9

Choose all that correctly complete the statement. Chemical reactions can...

Chemistry
2 answers:
Slav-nsk [51]4 years ago
5 0
The correct answers are A, B, and C

- For example, hydrogen and oxygen are two elements that form to create water. Water is more complex than a simple atom of hydrogen or one of oxygen.

- Decomposition is an example of B

- Burning is an example of C.

D is not right because a chemical change can only join atoms or rearrange them, not completely change them.
deff fn [24]4 years ago
3 0
<span>Choose all that correctly complete the statement. Chemical reactions can...

A. create products more complex than the reactants.
B. break down reactants into simpler products.
C. give off energy as heat.. </span>
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PLEASE HELP 30 POINTS
Bas_tet [7]

Answer:

Because the rock is irregularly shaped, you used the displacement  method to measure its volume.  You used  <u>calculations</u>  to indirectly find the <u>density</u>  of the objects.

PLZ Brainliest

8 0
3 years ago
Scientists found a fern fossil in some rock layers of the Grand Canyon. They estimated that a sample of one of the fossils origi
icang [17]
This question is dealing with the half-life of carbon-14 which can be used to determine the age of a substance according to the following equation:

t = [ln(N/No)/(-ln2)] · t1/2

N = # of carbon-14 atoms presently = 250 atoms
No = # of carbon-14 atoms initially = 1000 atoms
t1/2 = half-life = 5730 years for carbon-14

We can now input all of the information into the formula to find the age of the fossil:

t = [ln (250/1000)/-ln2] x 5730 years

t = 11460 years

The fossil should be found to be roughly 11,460 years old.
3 0
3 years ago
What is the difference between alectronegativity and ioniztion energy
s344n2d4d5 [400]

Electronegativity is the tendency of the element to attract shared pair of electron towards itself in bonded condition.
Ionisation enrgy is the amount of energy required to remove the outermost electron from neutral gaseous atom


5 0
3 years ago
When a solution is allowed to crystallize slowly, impurities are excluded from the growing crystal structure because: A. The mol
Oliga [24]

Answer:

B

Explanation:

4 0
4 years ago
How does molecular motion change during the freezing process?
AlladinOne [14]

Answer:

the molecules stop sliding and tumbling all over each other

Explanation:

7 0
3 years ago
Read 2 more answers
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