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3 years ago

Which phase of the moon is shown?

Chemistry

2 answers:

aleksandrvk [35]3 years ago

5 0

Waxing crescent I know that bc I took the test

slega [8]3 years ago

4 0

Waxing crescent, I also took the test

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Why carbon dioxide can be tested with the help of moist blue litmus paper ?<br>

Evgesh-ka [11]

Answer:

carbon dioxide is acidic and when it comes in contact with blue litmus paper it turns red

Explanation:

4 0

4 years ago

How many grams of CuSO4 • 5H2O do you need to make 0.8 L of a 0.6 M solution

Bumek [7]

<h3><u>Unders</u><u>tanding</u><u> </u><u>the</u><u> </u><u>conc</u><u>ept</u><u>:</u><u>-</u></h3>

Here the concept of Molarity used .We will put the formula of Molarity then we find moles of copper sulphate .Then we can find the.Given weight of Copper sulphate.So let's do

<h3>Solution:-</h3>

Volume of Solvent=0.8L
Molarity=0.6M

We know

$\boxed{\sf Molarity=\dfrac{Moles\:of\: solute}{Volume\:of\: Solvent \:in\;L}}$

$\\ \rm\longmapsto Moles\:of\: solute=Molarity\times Volume\:of\: Solvent\:in\:L$

$\\ \rm\longmapsto Moles\:of\: Solute=0.8(0.6)$

$\\ \rm\longmapsto Moles\:of\: Solute=0.48mol$

Now

Molar Mass of Solute:-

$\\ \rm\longmapsto CuSO_4.5H_2O$

$\\ \rm\longmapsto 65u+32u+4(16u)+5(2\times 1u+16u)$

$\\ \rm\longmapsto 96u+64u+5(2+16)$

$\\ \rm\longmapsto 160u+90u$

$\\ \rm\longmapsto 250u$

$\\ \rm\longmapsto 250g/mol$

Now

$\boxed{\sf No\:of\:moles=\dfrac{Given\:Mass}{Molar\:Mass}}$

$\\ \rm\longmapsto Given\:Mass=No\:of\:Moles\times Molar\:Mass$

$\\ \rm\longmapsto Given\:Mass=250(0.48)$

$\\ \rm\longmapsto Given\:Mass=120g$

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3 years ago

Identify impacts of air pollution

Valentin [98]

Heart disease, lung cancer and respiratory diseases

7 0

3 years ago

Read 2 more answers

What is the second most abundant gas in the atmosphere

Vsevolod [243]

Oxygen is the second. The first is nitrogen which makes up 78% of air. Oxygen makes up 21% of air.

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3 years ago

A teacher reacts 84.0 g of sodium bicarbonate with excess hydrochloric acid. What is the percent yield for sodium chloride if 56

Bond [772]

Answer:

Explanation:

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3 years ago