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Travka [436]
3 years ago
7

Elements in group 2 are all called alkaline earth metals. What is most similar about the alkaline earth metals?

Chemistry
2 answers:
Eddi Din [679]3 years ago
6 0

Answer:

DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

Explanation:

german3 years ago
4 0

Answer:

D

Explanation: the last one

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All that glitters is not gold what is details?
Anna [14]

Explanation: This statement implies that something may not be as valuable or precious as it appears at first glance. This statement was first used by Shakespeare, along with many other words and phrases. The statement is usually associated with morals and themes in stories.  

Hope this helps!

3 0
4 years ago
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While ethanol (CH3CH2OH) is produced naturally by fermentation, e.g. in beer- and wine-making, industrially it is synthesized by
Anna [14]

<u>Answer:</u> The number of moles of ethanol after equilibrium is reached the second time is 11. moles.

<u>Explanation:</u>

We are given:

Initial moles of ethene = 34 moles

Initial moles of water vapor = 15 moles

The chemical equation for the formation of ethanol follows:

              CH_2=CH_2+H_2O\rightleftharpoons CH_3CH_2OH

Initial:            34          15

At eqllm:     34-x           15-x            x

We are given:

Equilibrium moles of ethene = 24 moles

Equilibrium moles of water vapor = 5 moles

Calculating for 'x'. we get:

34-x=24\\\\x=10

Volume of container = 100.0 L

The expression of K_c for above equation follows:

K_c=\frac{[CH_3CH_2OH]}{[CH_2=CH_2][H_2O]}      .......(1)

[CH_3CH_2OH]=\frac{10}{100}=0.1M

[CH_2=CH_2]=\frac{24}{100}=0.24M

[H_2O]=\frac{5}{100}=0.05M

Putting values in expression 1, we get:

K_c=\frac{0.1}{0.24\times 0.05}\\\\K_c=8.3

Now, 11 moles of ethene gas is again added and equilibrium is re-established, we get:

The chemical equation for the formation of ethanol follows:

              CH_2=CH_2+H_2O\rightleftharpoons CH_3CH_2OH

Initial:         24+11          5              10

At eqllm:     35-x          5-x            10+x

[CH_3CH_2OH]=\frac{10+x}{100}

[CH_2=CH_2]=\frac{35-x}{100}

[H_2O]=\frac{5-x}{100}

Putting values of in expression 1, we get:

8.3=\frac{\frac{(10+x)}{100}}{\frac{(35-x)}{100}\times \frac{(5-x)}{100}}\\\\8.3=\frac{(10+x)\times 100}{(35-x)\times (5-x)}\\\\x^2-52x+55=0\\\\x=50.9,1.1

The value of 'x' cannot exceed '35', so the numerical value of x = 50.9 is neglected.

Moles of ethanol = (10+x)=10+1.1=11.

Hence, the number of moles of ethanol after equilibrium is reached the second time is 11. moles.

8 0
3 years ago
3. What is the gram-formula mass of (NH4)3PO4?
nasty-shy [4]
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4 0
3 years ago
I have 4 moles of CO2. How many molecules of CO2 is this?
Lemur [1.5K]

Answer:

4?

Explanation:

4, I think.

7 0
4 years ago
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Answer: grounding

Explanation:

6 0
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