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Makovka662 [10]
3 years ago
12

Need help with 4 please

Chemistry
1 answer:
vlada-n [284]3 years ago
6 0
DUDE IS THAT K12 STUFF I THINK I GOT THE ANSWER
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What causes the output work of a machine to be less than the input work?????
melisa1 [442]

Inefficiency of the material or engine causes the output work of a machine to be less than the input work. It is governed by the second law of thermodynamics wherein no product of work can produce 100 percent efficiency. Only the Carnot engine can produce a 100 percent effieciency.

6 0
4 years ago
Calculate the pH of a solution with [+]= 1x 10^-6 <br><br> 12<br> 28.01<br> 6<br> 14
Scilla [17]
-log(10pwer -6) is 6
6 0
3 years ago
Read 2 more answers
Magnesium has three isotopes. Magnesium-24 has a percent abundance of 78.99% Magnesium- 26 has a percent abundance of 11.01% Wha
Inessa05 [86]
Percentage of abundance of Magnesium = 78.99%

<span>Magnesium- 26 has a percent abundance = 11.01%
</span>
100-78.99-11.01=10%
4 0
3 years ago
When placed in a 200-mL square box, a substance has a spherical shape and has a volume of 75 mL. When placed in a 200-mL circula
Anastasy [175]

Answer:

a. Solid

Explanation:

<em>Solid substances do not change size or shape according to their containers</em>. In other words, solid substances keep their size and shape.

<em>Liquid and gas substances take the shape of their container</em>, so any of them would be square-shaped when put in a square box, and they would be spherical shaped when put in a spherical container.

3 0
3 years ago
A solid was found to be highly soluble in water. Treating separate portions of a solution of this solid with aqueous solutions o
chubhunter [2.5K]

Answer:

c. Li_2CO_3

Explanation:

Hello,

Due to the fact that an odorless gas was released, the chemical reaction between lithium carbonate and a random acid (for instance hydrochloric acid) turns out into:

Li_2CO_3(s)+2HCl(aq)-->2LiCl(aq)+CO_2(g)+H_2O(l)

It is known that carbonic acid is unstable and it quickly decomposes into water and carbon dioxide which is an odorless gas. In spite of the fact that the PbSO_3 releases SO_2 it isn't the solid since that gas is odorous.

Best regards.

3 0
3 years ago
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