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Molodets [167]
3 years ago
9

Why does a chemical equation be balanced?

Chemistry
1 answer:
Zolol [24]3 years ago
5 0

Answer:

Law of conservation of matter

Explanation:

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A gas occupies a volume of 650.0 mL when the pressure is 3.50 atm. What will the new volume be if the pressure is reduced to 1.6
Gemiola [76]

The new volume will be 1379 mL.

Explanation:

As per Boyle's law, the product of initial volume and initial pressure of any gas molecule is equal to the product of final volume and final pressure of those molecules.

So here the initial volume is 650 ml and the initial pressure is 3.50 atm. As the temperature is said to be constant, then this system will be obeying Boyle's law. So, the final pressure is given as 1.65 atm. As there is a reduction in the pressure, the volume of the gas is tend to get expanded.

P_{1} V_{1} = P_{2} V_{2}

So, (650*10^{-3}*3.50)=(1.65*V_{2})

V_{2} = \frac{650*10^{-3}*3.50}{1.65} = 1379 mL

So, the new volume of the gas on reduction in pressure is 1379 mL.

7 0
3 years ago
Suppose that Biuret reagent turns purple when it is added to an unknown substance. What can you conclude about the substance?
Oksi-84 [34.3K]

Answer:

the unknown substance is a protein

Explanation:

The biuret test is one of the tests for proteins. It  can be used to  detect peptide linkages. The biuret test is carried out in an alkaline solution. A coordination complex is formed  leading to the appearance of a  violet color.

Summarily, the biuret method is a colorimetric technique used to test for proteins and peptides.  It involves the formation of  a purple (violet) complex of Copper salts in alkaline solution.

Hence when the biuret reagent is added to an unknown substance and it turns purple, the unknown substance is a protein

6 0
3 years ago
Which of the following is an empirical formula?<br> OP205<br> O C2H602<br> ON3F6<br> OC8H18
jarptica [38.1K]

Answer:

None are empirical formulas

Explanation:

All are actual compounds. An example of an empirical formula could be CH2O, the empirical formula for carbohydrates like glucose (C6H12O6).

7 0
2 years ago
When a ball is rolling down a hill, what forces are acting on the ball? Why does it speed up?
Margaret [11]

Answer:gravity

Explanation:

3 0
3 years ago
Read 2 more answers
Which species is the reducing agent in a redox reaction? Chem is hard​
Mandarinka [93]

Answer:

<h2>The species that furnishes the electrons is called the reducing agent. In this case, the reducing agent is zinc metal.</h2>

Explanation:

<h2>Hopes this helps. Mark as brainlest plz!</h2>
6 0
3 years ago
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