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natulia [17]
3 years ago
6

Need help !!!!! In this question im stuck

Chemistry
1 answer:
GenaCL600 [577]3 years ago
5 0

Decrease, increase and increase I think this is correct

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Why are scientists so concerned about rising levels of CO2? What is it about this particular gas that makes it
Verdich [7]

Answer:

It can trap heat.

Explanation:

8 0
3 years ago
The chemical formula for the ionic compound aluminum sulfite is Al2(SO3)3. Explain why there are 2 cations for every 3 anions in
svp [43]

Answer:

Explanation:

While trying to write the chemical formula for a compound (a neutral molecule), one must identify and exchange the charge of the cation with that of the anion to become the subscript of one other. For example

Aluminium oxide has Aluminium (Al) and oxygen (O); since Al has a charge of 3+ (the cation) and O has a charge of 2- (the anion), the compound would have it's charges as Al³⁺O²⁻ and when the charges are exchanged to there subscripts, it would form Al₂O₃; thus there would be two cations of aluminium for every three anions of oxygen in order to have a neutral molecule.

This same explanation can be given to Aluminium sulfite. Aluminium sulfite has Aluminium (Al) and sulfite (SO₃). Al has a charge of 3+ (cation) while sulfite has a charge of 2- (anion), with the compound having it's charges as Al³⁺(SO₃)²⁻ and when the charges are exchanged to there subscripts, it would form Al₂(SO₃)₃ and would thus have 2 cations of aluminium (Al³⁺) for every 3 anions of sulfite (SO₃³⁻) in order to have a neutral molecule.

8 0
3 years ago
C₂H₄O₂ + O₂ ➞ CO₂ + H₂O
densk [106]

Answer:

C2H4O2 + 2O2 ==> 2CO2 + 2H2O

Explanation:

Start with the carbons

C2H4O2 + O2 ==> 2CO2 + H2O There are 2 on the left, so you need 2 on the right.

Next deal with the hydrogens. You have 4 on the left so you have to make 4 on the right

C2H4O2 + O2 ==> 2CO2 + 2H2O

The oxygens are the real devil in this question. Be careful how you handle them. There are 2 * 2 = 4 from the CO2 and 2*1 = 2 from the water. The total is 6

Now you can't just put a 3 in front of the O2. There are 2 in the given chemical. So you don't need 6. You need 6 -2 = 4. But the oxygen is O2. You have to divide the 4 by 2 to get 2

C2H4O2 + 2O2 ==> 2CO2 + 2H2O  

And that's your answer.

8 0
2 years ago
A mixture of 50 wt% methane, 35 wt% ethane, and 15 wt% propane. Determeine the mole fraction of methane.
dmitriy555 [2]

Answer:

a) Molar fraction:

Methane: 67,5%

Ethane: 25,1%

Propane: 7,4%

b) Molecular weight of the mixture: 25,16 g/mol

Explanation:

with a basis of 100 kg:

Moles of methane:

500 g ×\frac{1mol}{16,04 g} = 31,2 moles

Mass of ethane

350 g ×\frac{1mol}{30,07 g} = 11,6 moles

Mass of propane

150 g ×\frac{1mol}{44,1 g} = 3,4 moles

Total moles: 31,2 moles + 11,6 moles + 3,4 moles = <em>46,2 moles</em>

Molar fraction of n-methane:

\frac{31,2moles}{46,2moles} =67,5%

Molar fraction of ethane:

\frac{11,6moles}{46,2moles} = 25,1%

Molar fraction of propane:

\frac{3,4moles}{46,2moles} = 7,4%

b) Average molecular weight:

0,5*16,04g/mol + 0,35*30,07g/mol+0,15*44,1g/mol} = <em>25,16g/mol</em>

I hope it helps!

5 0
3 years ago
What is the charge of the nucleus?
zzz [600]

The charge is a little negative

8 0
3 years ago
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