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mafiozo [28]
2 years ago
7

A current theory states during Earth’s formation, it was struck by a planet approximately the same size as Mars. Select the foll

owing effects of the impact. (Select 3)
A) Debris from the impact coalesced to form the moon.


B) The Earth gained mass from the impact.


C) The impact caused the surface of the Earth to melt.


D) The impact caused the Earth to slow its rotation.
Chemistry
1 answer:
Ivanshal [37]2 years ago
7 0

Answer:

the earth gained mass from the impact :)

welcome

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Whats the formula for mass
s2008m [1.1K]

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Find the volume of 56.0 grams of O2 at stp
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The molar mass of O2 is 32g/mol. So the mol amount of these O2 is 56/32=2 mol. STP stands for the standard temperature and pressure which means the temperature is 0 ℃ and pressure is 100 kPa. And the molar volume of gas is 22.7 L/mol under STP. So the answer is 22.7*2=45.4 L
6 0
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6. Macromolecules represent which level of organization in the body?
hodyreva [135]

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Chemical

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6 0
2 years ago
For the skeletal chemical equation BF3(g) + NaH(s) → B2H6(g) + NaF(s) what is the coefficient of B2H6 in the balanced equation?
KonstantinChe [14]

Answer:

Coefficient in front of the B_2H_6  in the balanced equation - 1

Explanation:

The unbalanced Chemical equation is shown below as:-

BF_3+NaH\rightarrow B_2H_6+NaF

On the left hand side,  

There are 1 boron atom and 3 fluorine atoms and 1 sodium and hydrogen atoms.

On the right hand side,  

There are 2 boron atoms and 6 hydrogen atoms and 1 sodium and fluorine atoms.

Thus,  

leftside, BF_3 must be multiplied by 2 to balance boron and right side, NaF must be multiplied by 6 to balance fluorine. Left side, NaH must be multiplied by 6 to balance sodium and hydrogen atoms.

Thus, the balanced reaction is:-

2BF_3+6NaH\rightarrow B_2H_6+6NaF

<u>Coefficient in front of the B_2H_6  in the balanced equation - 1</u>

6 0
3 years ago
Read 2 more answers
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