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NISA [10]
3 years ago
12

Matter is _______ energy because matter is always ___________ in a chemical reaction.

Biology
1 answer:
expeople1 [14]3 years ago
7 0
It’s B because accordin to the Law of Conservation of Energy, energy cannot be created or destroyed. However, energy can transform and be conserved.
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Nitrogen gas reacts with hydrogen gas to form ammonia What are reactants in this chemical reaction?
krek1111 [17]

1 mol 2 mol  

84g of N2(g) = 84/28 = 3 mol of N2(g)  

From the above reaction 1 mol of N2(g) gives 2 mol 0f NH3(g). So 3 mol of N2(g) should give 6 mol or (6x17) 102 g of NH3(g). But we are getting only 85.0 g of NH3.  

Hence %yield of NH3 = 100x85.0/102 = 83.3%  

Answer D. is correct.  

2. 2HgO (s) --------------------- 2Hg (l) + O2 (g)  

2 mol 2 mol 1 mol  

4 mol 4 mol 2 mol  

As only 1.5 mol of O2 is obtained, so % yield = 1.5x100/2 = 75.0%  

Moreover 603 g of Hg = 603/200.59 = 3.00 molof Hg. Considering this also  

% yield = 3x100/4 = 75%

6 0
3 years ago
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Describe the water cycle
BaLLatris [955]

Answer: I hope this helps, if you have any additional questions please put them in the comments and I will do my best to answer them

Explanation:

The water cycle describes how water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation.

3 0
2 years ago
If an organism's diploid number is 12, its haploid number is ___
V125BC [204]
The haploid number is half of the genome chromosomes of the organism, in thus case it would be 6.
7 0
3 years ago
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I need help on my science test please it’s due soon
mote1985 [20]

Answer: Layer 3

Explanation:

7 0
2 years ago
Which nitrogen base sequence is the partner of C-A-T-C-G-A?
iogann1982 [59]

g- t- a- g- c - t or if ur trying to find the mRNA things it’s g- u- a- g- c- u

it depends really but i think this is the answer

4 0
2 years ago
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