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dsp73
3 years ago
12

EV 30 points pls help it’s urgent Thanks :)

Chemistry
1 answer:
Romashka [77]3 years ago
6 0

Answer:

I think it was absorbed

I think when it was set to 4, it went straight through

Explanation:

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No links please. How many moles of methane (CH4) are in 7.31x10^25 molecules?
ad-work [718]

Answer:

molar mass of methane CH4

= C + 4 H  

= 12.0 + 4 x 1.008

= 12.0 +  4.032

= 16.042g/mol

7.31 x 10^25 molecules x             1 mole  CH4      = 121.43 moles

                                      6.02 x 10^23 CH4 molecules

121.43 moles CH4 are present.

Explanation:

not to certain if this is right or not.. but hope it helps!

4 0
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Apart from plants, what other group of organisms photosynthesises?<br>​
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Answer:

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2 years ago
Balance the equations.<br> Zn+ HCl →<br> ZnCl2 +
motikmotik

Answer:

Zn + 2HCl → ZnCl2 + H2

Explanation:

Zn + HCl → ZnCl2 +

The complete equation is given below:

Zn+ HCl → ZnCl2 + H2

Now we can balance the equation by doing the following:

There are 2 atoms of Cl and 2 atoms of H on the left. This can be balanced by putting 2 in front of HCl as shown below:

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7 0
4 years ago
Which of the following is a completely elastic collision? A. a ball rebounds against a wall, reversing its direction, but at onl
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Answer:

Answer E.

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We can go through each answer choice:

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C. A reduced speed indicates that there is a loss of kinetic energy. This is NOT elastic.

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E. This collision indicates an exchange of velocities, characteristic of an elastic collision. We can prove this:

Let:

m = mass of each ball

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And the final as:

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5 0
3 years ago
Read 2 more answers
HELP ASAP!
Solnce55 [7]

Answer:

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Explanation:

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