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horrorfan [7]
3 years ago
15

Rachel is using a Bunsen burner to heat a solution. Which of the following would let her control the rate of reaction in the sol

ution? a replacing the amount of flame gas used with different rate.. b controlling the amount of air entering the combustion tube .. c placing the berner in open surroundings
Chemistry
2 answers:
kenny6666 [7]3 years ago
8 0

Answer:

b controlling the amount of air entering the combustion tube

Explanation:

In the Bunsen burner there is an adjustable collar which can be regulated to adjust the amount of oxygen (air) entering the burner and reacting with the gas. There is also a gas value which can be regulated to adjust the volume of gas entering the burner and thus controlling the height and the intensity of the flame generated by the Bunsen burner.

emmasim [6.3K]3 years ago
5 0
"Controlling the amount of air entering the combustion tube" is the statement among the statements given in the question that <span>would let her control the rate of reaction in the solution. The correct option among all the options that are given in the question is the second option or option "b". I hope the answer helps you.</span>
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Answer:

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Explanation:

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The table tells us that the larger the diameter the shorter the period of rotation is
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3 years ago
Dana is trying to determine if an unknown sample is a pure substance or not. The sample has a cloudy white color, and it seems e
Firdavs [7]

Answer:

Dana filtered the sample and larger granules of the sample were left behind.

Explanation:

If a substance is pure, it will have a uniform composition throughout. It will not separate into particles of various sizes.

One of the characteristics of pure substances is that they are homogeneous. A mixture is definitely made up of particles of various sizes.

Since the particles was filtered and larger granules were left behind, the sample has been separated by a physical method (filtration). Only a mixture can be separated by physical methods. It is not a pure substance.

5 0
3 years ago
What is that the theoretical yield of aluminum oxide I if 3.20 mol of aluminum metal is exposed to 2.70 mole of oxygen
photoshop1234 [79]

Answer:

163.2g

Explanation:

First let us generate a balanced equation for the reaction. This is shown below:

4Al + 3O2 —> 2Al2O3

From the question given, were were told that 3.2moles of aluminium was exposed to 2.7moles of oxygen. Judging by this, oxygen is excess.

From the equation,

4moles of Al produced 2moles of Al2O3.

Therefore, 3.2moles of Al will produce = (3.2x2)/4 = 1.6mol of Al2O3.

Now, let us covert 1.6mol of Al2O3 to obtain the theoretical yield. This is illustrated below:

Mole of Al2O3 = 1.6mole

Molar Mass of Al2O3 = (27x2) + (16x3) = 54 + 48 =102g/mol

Mass of Al2O3 =?

Number of mole = Mass /Molar Mass

Mass = number of mole x molar Mass

Mass of Al2O3 = 1.6 x 102 = 163.2g

Therefore the theoretical of Al2O3 is 163.2g

8 0
3 years ago
Most favourable conditions for electrovalency are
anygoal [31]

Answer:

I think

Explanation:

low charge of ions, large cation and small anion

7 0
3 years ago
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