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torisob [31]
3 years ago
7

calculate the atomic mass of carbon if the two common isotopes of carbon have masses of 12.000 amu (98.89% abundance) and 13.003

amu (1.11% abundance)
Chemistry
1 answer:
Bingel [31]3 years ago
6 0

12.01 amu

Work:

(12.000 × .9889) + (13.003 × .0111) = 12.01

  • turn the precents into decimals

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Which of the following is a valid mole ratio from the balanced equation 2Fe2O3+3C yield 4Fe+3CO2
riadik2000 [5.3K]

Answer :

The balanced chemical reaction is,

2Fe_2O_3+3C\rightarrow 4Fe+3CO_2

From this balanced chemical reaction, we conclude that

2 moles of iron oxide react with the 3 moles of carbon to give 4 moles of iron and 3 moles of carbon dioxide.

Therefore, the valid mole ratio from the balanced chemical reaction is,

Fe_2O_3:C:Fe:CO_2=2:3:4:3

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3 years ago
And a 40N Torce in a southeriy direction?
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Answer:

I Don't Know.

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3 years ago
Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is S2(g)+C(s)↽−−⇀CS2(g)????c=9.40 at 900 K Ho
Maru [420]

Answer : The mass of CS_2 is, 555.028 grams

Explanation :

First er have to calculate the concentration of S_2.

\text{Concentration of }S_2=\frac{\text{Moles of }S_2}{\text{Volume of solution}}=\frac{8.08mole}{5.35L}=1.51mole/L

Now we have to calculate the concentration of CS_2.

The given balanced chemical reaction is,

                          S_2(g)+C(s)\rightleftharpoons CS_2(g)

Initial conc.         1.51       0         0

At eqm. conc.   (1.51-x)  (x)       (x)

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[CS_2]}{[S_2]}

Now put all the given values in this expression, we get :

9.40=\frac{x}{(1.51-x)}

By solving the term 'x', we get :

x = 1.365 M

Concentration of CS_2 = x M = 1.365 M

Now we have to calculate the moles of CS_2.

\text{Moles of }CS_2=\text{Concentration of }CS_2}\times \text{Volume of solution}=1.365mole/L\times 5.35L=7.303mole

Now we have to calculate the mass of CS_2.

Molar mass of CS_2 = 76 g/mole

\text{Mass of }CS_2=\text{Moles of }CS_2}\times \text{molar mass of }CS_2}=7.303mole\times 76g/mole=555.028g

Therefore, the mass of CS_2 is, 555.028 grams

3 0
4 years ago
Which is not a disadvantage to wind energy?
Marat540 [252]

Answer:number c I think

Explanation:

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3 years ago
Compound X is a secondary alcohol whose formula is C3H8O. When compound X is heated with strong acid, it dehydrates to form comp
goldfiish [28.3K]

Answer:

See picture for answer

Explanation:

At the beggining, we know that X is a secondary alcohol, with 3 carbons. The only secondary alcohol with 3 carbons, it's the isopropylic alcohol (or 2-propanol). So, in strong acid conditions, we are actually dehidrating the alcohol, to form an alkene, and then it's oxidized to form either a Ketone or aldehyde.

So in picture 1, you have all three compounds, and the mechanism of reaction to form Y.

7 0
3 years ago
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