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NNADVOKAT [17]
3 years ago
6

What does expunge mean?

Chemistry
1 answer:
trasher [3.6K]3 years ago
3 0

It means is where something is removed or erased completely or something unwanted or unpleasant.


Hope this helps and the right meaning of expunge.

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What is the molarity of a solution that contains 0.400 mol HCI in 9.79 L solutions ​
USPshnik [31]

Molarity's formula is known as: Molarity(M)=moles of solute/liters solution.

In this case we are already given moles and liters so you just have to plug the numbers into the equation.

0.400 mol HCL/9.79L solution=0.040858M

If you were to use scientific notation, the answer will be: 4.1*10^-2, but otherwise, you can just use the decimals above and round appropriately as you see fit.

6 0
3 years ago
When bismuth-212 undergoes alpha decay, it becomes which of the following?
Iteru [2.4K]

Answer: -

When bismuth-212 undergoes alpha decay, it becomes ²⁰⁸Tl

Explanation: -

Mass number of ²¹²Bi = 212

Atomic number of ²¹²Bi = 83

When alpha decay occurs the mass number decreases by 4 and the atomic number decreases by 2.

Mass number of daughter = 212 - 4 = 208

Atomic number of daughter = 83 - 2 = 81

It is the atomic number of Thallium Tl.

Thus the daughter nucleide is ²⁰⁸Tl.

8 0
3 years ago
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When a solution produces equal numbers of hydrogen and hydroxyl ions, it is said to be neutral. Select one: True False
ioda

Answer:

true

Explanation:

The hydroxyl group is a functional group formed by an oxygen atom and a hydrogen atom.

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4 years ago
Holly wants to design a test to find out how fast her friend Jill can walk from one end of the playground to the other.
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D

Explanation:

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Please help fast, I will give brainliest.
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