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Anarel [89]
3 years ago
13

4.00 moles of CU(CN)2Find the number of grams ​

Chemistry
1 answer:
UNO [17]3 years ago
6 0

Hey there!

Cu(CN)₂

Find the molar mass.

Cu: 1 x 63.546 = 63.546

C: 2 x 12.01 = 24.02

N: 2 x 14.07 = 28.14

-----------------------------------

                      115.706 grams

The mass of one mole of Cu(CN)₂ is 115.706 grams.

We have 4 moles.

115.706 x 4 = 463

4.00 moles of Cu(CN)₂ has a mass of 463 grams.

Hope this helps!

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Answer:

The law is observed in the given equation.

Explanation:

CaCO₃ + 2HCI → CaCI₂ +H₂O + CO₂

In order to find out if the law of conservative mass is followed, we need to <u>count how many atoms of each element are there in both sides of the equation</u>:

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As the numbers for all elements involved are the same, the law is observed in the given equation.

8 0
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A few pieces of dry ice, CO2(s), at -78°C are placed in a flask that contains air at 21°C. The flask is sealed by placing an uni
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RUDIKE [14]

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Here, the nitrogen atom is the central atom and its outermost shell is surrounded by four electron pairs - one lone pair and three bond pairs. This means that it has a tetrahedral electron pair geometry.

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6 0
3 years ago
Can someone help me with this one
jek_recluse [69]

Answer:

Easy my dude let me help you out

A.In

B.27

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D.49

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Also with protons and electrons they equal the same atomic number

4 0
3 years ago
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