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Marina CMI [18]
3 years ago
11

Sources, 19. Why is it important to protect water 15 like spring wells​

Chemistry
1 answer:
const2013 [10]3 years ago
3 0

Answer:

One of the best ways to protect your drinking water is to prevent pollution from getting into your drinking water source. Your drinking water can become polluted with animal waste, fertilizer, pesticides, herbicides, motor oil, gasoline, and other substances as they get carried to the source by runoff pollution .

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Which of the following was a major contribution to chemistry by Antoine Lavoisier
aksik [14]
Among other also important contributions, I can mention tha he:

- Discovered the role of Oxygen in comustion and respiration

- Discovered that water is a compound of hydrogen and oxygen

- Invalidated the theory of phlogiston

- Discovered some elements

- Was a main contributor to develop chemistry as a quantitative science

- Made an extensive list of elements
7 0
4 years ago
Does the size of the sample of uranium-238 affect its half-life
AleksandrR [38]
Answer is: <span>the size of the sample of uranium-238 does not affect its half-life.
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The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration (size of the sample).
</span>Half-life <span>is the time required for a quantity (in this example number of radioactive uranium) to reduce to half its initial value.</span><span>

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3 0
4 years ago
The density of concentrated ammonia, which is 28.0% w/w nh3, is 0.899 g/ml. what volume of this reagent should be diluted to 1.0
vlada-n [284]

Answer: 2.4 ml

Solution :

Molar mass of NH_3 = 17 g/mole

Given,: 28% w/w of NH_3 solution means 28 g of ammonia in 100 g of solution.

Mass of solution = 100 g

Now we have to calculate the volume of solution.

Volume=\frac{Mass}{Density}=\frac{100g}{0.899g/ml}=111.2ml  

Molarity : It is defined as the number of moles of solute present in one liter of solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute NH_3=\frac{\text {given mass}}{\text {molar mass}}=\frac{28}{17}=1.65moles

V_s = volume of solution in liter = 0.11 L

Now put all the given values in the formula of molarity, we get

Molarity=\frac{1.65moles}{0.11L}=15mole/L

Using molarity equation:

M_1V_1=M_2V_2

15\times V_1=0.036\times 1.0\times 10^{3}

V_1=2.4ml

6 0
4 years ago
Five (5) muscular injuries and disease​
seropon [69]

Answer:

tendinitis.

carpal tunnel syndrome.

osteoarthritis.

rheumatoid arthritis (RA)

fibromyalgia.

bone fractures.

7 0
2 years ago
Read 2 more answers
Iron can rust when exposed to oxygen. What method could be used to prevent iron from rusting?
steposvetlana [31]
Iron does not rust from oxygen itself. Iron needs to be in contact with H2O, which is water and oxygen. So just keep iron out of contact with water, or when you do, make sure you wipe the iron dry. :) Hope this helps!
3 0
4 years ago
Read 2 more answers
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