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ruslelena [56]
3 years ago
12

Which of the following statements does not describe a chemical property of oxygen:

Chemistry
1 answer:
g100num [7]3 years ago
5 0
I have a feeling that #2 is the one.
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When heating a chemical solution over an open flame in a test tube you should - A. keep a cork in the test tube so the solution
Alla [95]

Hello.

The answer is:  A. keep a cork in the test tube so the solution cannot spill out

B and C both could be very deadly and it shouldnt be D because if u have an open flame you shouldnt open it even if its not towards anyone.

have a nice day

3 0
3 years ago
Solid aluminum and gaseous oxygen read in a combination reaction to produce aluminum oxide. 4Al(s) + 3O_2(g) rightarrow 2Al_2O_3
Kryger [21]

Answer:

4.7 g. Option 5 is the right one.

Explanation:

4Al(s) + 3O₂ (g) ⇄ 2Al₂O₃ (s)

We convert the mass of reactants to moles, in order to determine the limiting.

2.5 g Al / 26.98 g/mol → 0.092 moles of Al

2.5 g O₂ / 32g/mol → 0.078 moles of O₂

Ratio is 4:3. 4 moles of Al react with 3 moles of O₂

Then, 0.092 moles of O₂ would react with (0.092 . 3)/ 4 = 0.069 moles O₂

We have 0.078 moles of O₂ and we need 0.069 moles, the oxygen is the limiting in excess. Therefore the Al is the limiting reactant.

Ratio is 4:2. 4 moles of Al, can produce 2 moles of Al₂O₃

Then, 0.092 moles of Al would produce (0.092 .2) / 4 = 0.046 moles

If we convert the moles to mass, we find the anwer:

0.046 mol . 101.96 g/mol = 4.69 g

5 0
3 years ago
Which property indicates how light is reflected from a minerals surface
masya89 [10]

Answer: Luster (happy to help)

Explanation: Luster is the property of minerals that indicates how much the surface of a mineral reflects light.

4 0
3 years ago
Read 2 more answers
What is the oxidation number for as in as2o3?
Mekhanik [1.2K]
Ok so O3 has a greater electronegativity and is taken into account first, -2*3=-6, so As has to equal 6/2=3, so As has a +3 oxidation number here
8 0
3 years ago
Read 2 more answers
I got the correct answer, but I don't know why. Could someone explain this to me?
MakcuM [25]

Answer:-

Option 2

Explanation:-

In a multi step reaction, the overall reaction is as fast as the slowest step only.

So the rate of a multistep reaction is the same as the rate of its slowest step.

The gas phase reaction was found to be second order wrt NO2.

So the slowest step must have 2 NO2 since the dependence is second order on NO2.

It was also found to be zero order wrt CO.

So the slowest step must not contain any CO since it’s presence has no effect on the reaction (zero order).

Among all options, only number 2 meets the two criterion

Thus the steps are

NO2 + NO2 – NO3 + NO (Slow)

NO3 + CO – NO2 + CO2 (Fast)

3 0
3 years ago
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