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3 years ago

Does observing a physical property of a substance change the identity of the substance? Explain.

1 answer:

4 0

No because observing a physical property of a substance is just observing like color or texture. They don't change. Physical properties do not change the composition of a substance and neither do physical changes.

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Which color of light bends the least when passing through a prism?

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"RED" color bends the least when passing through a prism.

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3 years ago

Which ion was formed by providing the second ionization energy to remove an electron?

DerKrebs [107]

If we remove 2 electrons, the new charge will be positive by 2 units. Hence, the ion is $Ca^{2+}$ .

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3 years ago

Calculate the percent composition by mass of each element in NaClO2.

seropon [69]

Answer: Divide the mass of the first dissolved component by the solution mass, and then multiply the result by 100 to calculate the mass percentage. In our example, the first dissolved compound is NaCl; the mass percent is (10 g / 136 g) x 100 percent = 7.35 percent.

Explanation: its up, look

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3 years ago

Two reactions and their equilibrium constants are given. A + 2 B − ⇀ ↽ − 2 C K 1 = 2.79 2 C − ⇀ ↽ − D K 2 = 0.186 Calculate the

vfiekz [6]

Answer:

K=1.93

Explanation:

Given reactions are:

A +2B ⇄ 2C K1=2.79

2C ⇄ D K2=0.186

D⇄ A+ 2B K=?

If we reverse the reaction then the euillibrium constant also become reciprocal of original value:

3rd reaction is a combination of reciprocal of 1st and 2nd reaction

2C⇄A +2B 1/K1;........................1

D ⇄ 2C 1/K2; ..............................2

On adding 1 and 2

D ⇄A +2B $K=\frac{1}{K1} \times\frac{1}{K2};$

$K=\frac{1}{2.79} \times\frac{1}{0.186};$

K=1.93

4 0

4 years ago

Which best defines a pioneer species?

algol13

Answer:

The third one is the correct answer

Explanation:

5 0

3 years ago

Read 2 more answers