All categories

3 years ago

Please actually help me. Thank you!

Chemistry

1 answer:

Fittoniya [83]3 years ago

4 0

Answer:

The answer is Helium.

Explanation:

Scandium's atomic number is 21.

Sulfur's atomic number is 16

Lithium's atomic number is 3

Helium's atomic number is 2.

Therefore, the answer is Helium.

You might be interested in

Which substance can be decomposed by chemical means?

sweet-ann [11.9K]

Are u sure this is the right option? Well, antimony can be decomposed. Including octane.

5 0

3 years ago

What are the differences between a prokaryote and a eukaryote?

victus00 [196]

The answer is A. The prokaryote...

7 0

4 years ago

Read 2 more answers

The duration (length of time) of a lunar eclipse is

vlada-n [284]

Answer:

It is longer than a solar eclipse

7 0

3 years ago

Read 2 more answers

Hydrochloric acid is widely used as a laboratory reagent in refining ore for the production of tin and tantalum, and as a cataly

Lyrx [107]

<u>Answer: </u>0.0285 moles of HCl is present in given amount of solution.

<u>Explanation:</u>

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

$\text{Molarity of solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (mL)}}$ .....(1)

Given values:

Molarity of HCl = 0.453 M

Volume of solution = 62.85 mL

Putting values in equation 1, we get:

$0.453mol/L=\frac{\text{Moles of HCl}\times 1000}{62.85}\\\\\text{Moles of HCl}=\frac{0.453\times 62.85}{1000}=0.0285moles$

Hence, 0.0285 moles of HCl is present in given amount of solution.

4 0

3 years ago

What is the expected ionic charge when group VI elements participate in ionic bonds?

valina [46]

Group 6 elements usually have extra electrons to make give them an octet. So, they have 6 electrons to start and when they have an octet, they have 8.

We can find the charge by doing simple math 6 - 8 = -2

Answer is D)

3 0

4 years ago