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Drupady [299]
3 years ago
14

Please help... giving a lot of points and awarding brainliest.

Chemistry
1 answer:
NNADVOKAT [17]3 years ago
8 0
Theoretical Yield of H2SO3: 31.2 g
Percent Yield: 67.4%

Theoretical Yield of C2H6: 6.50
Percent Yield: 88.7%

Theoretical Yield of HF: 3.84
Percent Yield: 71.4%
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Delvig [45]

Answer:

What's the question?

Explanation:

5 0
2 years ago
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How many molecules of CBr4 are in 250 grams of CBr4
Kazeer [188]

Answer:- 4.54*10^2^3 molecules.

Solution:- The grams of tetrabromomethane are given and it asks to calculate the number of molecules.

It is a two step unit conversion problem. In the first step, grams are converted to moles on dividing the grams by molar mass.

In second step, the moles are converted to molecules on multiplying by Avogadro number.

Molar mass of CBr_4  = 12+4(79.9)  = 331.6 g per mol

let's make the set up using dimensional analysis:

250g(\frac{1mol}{331.6g})(\frac{6.022*10^2^3molecules}{1mol})

= 4.54*10^2^3 molecules

So, there will be 4.54*10^2^3 molecules in 250 grams of CBr_4 .


8 0
3 years ago
Radium-221 has a half-life of 30 sec. How long will it take for 96% of a sample to decay?
monitta
We can calculate how long the decay by using the half-life equation. It is expressed as:

A = Ao e^-kt

<span>where A is the amount left at t years, Ao is the initial concentration, and k is a constant.
</span><span>From the half-life data, we can calculate for k.
</span>
1/2(Ao) = Ao e^-k(30)
<span>k = 0.023
</span>
0.04Ao = Ao e^0.023(t)
<span>t = 140 sec</span>
3 0
3 years ago
Linolenic acid has cis double bonds with the formula ch3ch2ch=chch2ch=chch2ch=ch(ch2)7cooh. write out the abbreviated systematic
valentinak56 [21]
<span>Abbreviated systematic numbering for Linolenic Acid is,

                                                 18:3, n-3
Explanation:
                     
In above abbreviation 18 specifies number of carbon atoms in Linolenic Acid, 3 specifies the number of double bonds and n-3 specifies the position of first double bond from methyl end. The structure of Linolenic Acid is as follow,</span>

3 0
3 years ago
2.24g of iron combine with 0.96g of oxygen to form an oxide of iron. Determine the formula of this oxide of iron and use it to c
irakobra [83]

Answer:

See Explanation

Explanation:

Let us find the number of moles of each element

For iron = 2.24g/56 = 0.04 moles

For oxygen = 0.96 g/16 = 0.06 moles

Then we divide by the lowest ratio;

0.04/0.04      and     0.06/0.04

1                      and     2

We Thus obtain 1 : 1.5

Multiplying through by 2 we have; 2 : 3

The formula of the oxide formed is Fe2O3

The balanced equation is;

4Fe + 3O2 ------> 2Fe2O3

6 0
3 years ago
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