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Nata [24]
3 years ago
10

Which of the following statements is correct?

Chemistry
1 answer:
WITCHER [35]3 years ago
5 0

Answer: A

Explanation: i took the test

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Write the symbol of another isotope of lead with 132 neutrons.
Ivahew [28]

Answer:

Pb^+7

Explanation:

I placed the carrot there to signify the +7 is supposed to be small. It is plus seven because seven nuetrons are added

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3 years ago
A 50.0 mL sample of 12.0 M HCl is diluted to 200 mL. What is true about the diluted solution?
kobusy [5.1K]

The concentration of the solution reduces and the number of moles of solute isn't affected.

Data;

  • V1 = 50mL
  • C1 = 12.0M
  • V2 = 200mL
  • C2 = ?
<h3>Facts about the diluted solution</h3>

1. When the solution is diluted, the concentration changes and this time, the concentration reduces.

Using dilution formula

c_1 v_1 = c_2 v_2\\12 * 50 = c_2 * 200\\c_2 = \frac{600}{200} \\c_2 = 3M

The concentration of the solution reduces.

2. The number of moles remains the same.

When a solution is diluted, the number of moles remains the same because there's no change in the mass of the solute.

Learn more on concentration of a solution here;

brainly.com/question/2201903

7 0
3 years ago
Which of the following elements does not form hydride by direct heating with
ozzi
I believe the answer is A.

Hope this helps! ^^
4 0
3 years ago
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Срочно!!!!!!!помогите пожалуйста ​
Marizza181 [45]

Answer:

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Explanation:

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8 0
3 years ago
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What accommodations have been designed to protect astronauts from micrometeoroids hitting their spacesuits?
PolarNik [594]

Answer:

They are multilayered

Spacesuits provide protection from radiation and offer normal air pressure inside

Explanation:

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