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Margaret [11]
3 years ago
6

If a body`s efficiency is 75% what does it mean?​

Chemistry
1 answer:
snow_tiger [21]3 years ago
6 0

Answer: It’s producing 75% of it’s potential.

Example: If I were to be playing basketbal, and my body was working at 75%, then there is 25% of energy that I’m not using, making me worse than if I was using 100%.

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Sliva [168]
  <span>From the balanced equation: 
4mol Fe will produce 2mol Fe2O3 
Molar mass Fe = 55.847g/mol 
16.7gFe = 16.7/55.847 = 0.3mol Fe 
This will produce 0.15mol Fe2O3 
Molar mass Fe2O3 = 159.6887 g/mol 
0.15mol = 159.6887*0.15 = 23.95g Fe2O3 produced
Hope this helps</span>
6 0
3 years ago
in the laboratory, a group of students was assigned to determine the density of an unknown liquid. They used a buret to find a v
Daniel [21]

They should report the density as 1.11 g/L .

Density = mass/volume = 2.260g/2.04 mL

My calculator says the density <em>1.107 843 137 g/mL</em>

However, the answer can have <em>no more</em> significant figures than are in the number with the <em>fewest </em>significant figures.

The volume measurement has only three significant figures, so we must round off the density to three significant figures.

We drop all the digits after the zero.

The digit to be dropped is 7, so we <em>round up </em>the last significant figure of the answer.

1.10<u>7 843 137</u> → 1.11

4 0
4 years ago
C. What happens to stuff when you add heat energy to it?
Minchanka [31]

Answer:

it warms up

Explanation:

8 0
3 years ago
Read 2 more answers
What mass of ammonium chloride (NH4Cl) would you use to prepare 85.0 mL of a 1.20M solution NH4Cl?
NeX [460]

Answer:

Form: M= mols solute/ liters solution

Ans: 5.46 NH4Cl

6 0
3 years ago
Which of the following mixtures will show Tyndall effect?
disa [49]

Answer:

Explanation:

Milk and starch solution are example of colloidal solution and we know that Tyndall effect is shown by colloids.

5 0
3 years ago
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