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astra-53 [7]
3 years ago
15

1 where does drinking water come from? How might it become polluted or contaminated?

Chemistry
1 answer:
bearhunter [10]3 years ago
6 0

Answer: ABOUT 71% PERCENT OF EARTH'S SURFACE IS WATER COVERED,OUT OF THAT ONLY 2.5 %IS FRESH WATER.WE GETS DRINKING WATER FROM CLEAN RIVERS ,LAKES AND EVEN GROUND WATER. WE ALSO FILTERS THE SEA WATERS TOO.

WE HUMANS ARE THE ONE WHO ACTUALLY POLLUTE  THE WATER BODIES, BECAUSE WE THROW DOMESTIC AND INDUSTRY WASTES IN THE WATER BODIES AND THE AQUATIC ANIMALS ARE DYING BECAUSE OF THIS ACT. IF WE SAVE  THE WATER BODIES THEN THERE WOULD NO BE ANY POLLUTION etc

Explanation:

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How many grams of hcl can be produced from the reaction of 23 moles of h2 and 875g of cl2?
max2010maxim [7]

Answer: 899 g

Explanation:

Since the mass of a mole of diatomic chlorine is about 70.9 g/mol, this means that 875 grams is about 875/70.9 = 12.3 mol.

Hence, we know that chlorine is the limiting reactant, and that about 12.3 moles of chlorine will be consumed.

This means that 12.3(2)=24.6 grams of HCl will be produced, which will have a mass of about (24.6)(36.46)=899 g

8 0
2 years ago
If an atom contains one electron and one proton,will it carry any charge or not​
sertanlavr [38]

Answer:

no it will have no charge...it would be electrically neutral! because the number of protons and electrons are equal!

8 0
3 years ago
Read 2 more answers
How many Valence electrons does Li have?
deff fn [24]

It has a single valence electron.

3pro & 3ele - it is the single electron in shell 2.

6 0
3 years ago
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3) Lithium metal (Li) react with hydrosulfuric acid (HS) to produce hydrogen gas and magnesium chloride (Li 2 S) . How many gram
Vaselesa [24]

Answer:

3.066g

Explanation:

Step 1:

The balanced equation for the reaction. This is given below:

2Li + H2S —> Li2S + H2

Step 2:

Data obtained from the question.

Volume (V) of H2 = 4.5L

Temperature (T) = 315K

Pressure (P) = 1.258 atm

Note:

Gas constant (R) = 0.0821atm.L/Kmol

Number of mole (n) of H2 =..?

Step 3:

Determination of the number of mole of H2 produced.

This can be obtained by using the ideal gas equation as follow

PV = nRT

Divide both side by RT

n = PV /RT

n = 1.258 x 4.5 / 0.0821 x 315

n = 0.219 mole

Therefore, 0.219 mole of H2 is produced.

Step 4:

Determination of the number of mole of Li that will produce 0.219 mole of H2.

This is shown below:

2Li + H2S —> Li2S + H2

From the balanced equation above,

2 moles of Li reacted to produce 1 mole of H2.

Therefore, Xmol of Li will react to produce 0.219 mole of H2 i.e

Xmol of Li = 2 x 0.219

Xmol of Li = 0.438 mole

Step 5:

Conversion of 0.438 mole of Li to grams.

Number of mole of Li = 0.438 mole

Molar Mass of Li = 7g/mol

Mass = number of mole x molar Mass

Mass of Li = 0.438 x 7

Mass of Li = 3.066g

Therefore, 3.066g if Li is needed for the reaction.

6 0
3 years ago
A machine has a mechanical advantage of 5. What force should be applied to the machine to make it apply 3000 N to an object? 0.0
Umnica [9.8K]

Answer:

not a

Explanation:

i took the test on ed

5 0
2 years ago
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