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2 years ago

What is the mass of a substance in 0.5 mol of nh3

Chemistry

1 answer:

KATRIN_1 [288]2 years ago

6 0

Answer:

17 g/mol

Explanation:

don't worry tama yan

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If 20.0 mL of Ca(OH)2 with an unknown concentration is neutralized by 37.5 mL of 0.124 M HCl, what is the concentration of the C

Nady [450]

You first need to write the balanced chemical reaction for what is going on.
Ca(OH)₂+2HCl→2H₂O+CaCl₂

After you make the balanced chemical reaction, First you find the moles of HCl used. To do this multiply 0.0375L by 0.124M to get 0.00465mol HCl. Then you multiply 0.00465mol HCl by (1mol Ca(OH)₂)/(2mol HCl) to get 0.002325mol Ca(OH)₂. Finally to find concentration of Ca(OH)₂ used you divide 0.002325mol by 0.020L to get 0.116M Ca(OH)₂.
Therefore the concentration of the unknown solution of Ca(OH)₂ was 0.116M.

I hope this helps. Let me know if anything is unclear.

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2 years ago

Use the Activity Series Chart

omeli [17]

Answer:

Explanation:

Mg is above Al on the table meaning it is easier to oxidize.

Fe and Zn are below Al on the table showing they are not as reactive.

8 0

3 years ago

Do all materials respond to heat in the same way?

LenaWriter [7]

Answer:

No.

Materials like water get evaporated when heated, but materials like camphor get sublimed that is they directly get converted into gaseous form when heated, while materials like copper gets melted on heating

4 0

2 years ago

(23.4m)(14m) rounded off to the correct number of significant figures

VARVARA [1.3K]

The value of the given expression up to correct significant figures is $330 m^2$ .

The rule that applies for the multiplication and division is :

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

The rule that applies for the addition and subtraction is :

The least precise number present after the decimal point determines the number of significant figures in the answer.

Given:

The expression: (23.4m)(14m)

To find:

The answer up to correct a number of significant figures.

Solution

Number of significant figures in '23.4' = 3

Number of significant figures in '14' = 22

$=(23.4m)(14m)\\=(23.4m)\times (14m)\\=327.6 m^2$

The number with the least significant figures is '14' is 2, so the answer will be reported up to 2 significant figures:

$=327.6 m^2\approx 330 m^2$

Number of significant figures in '330' = 3

The value of the given expression up to correct significant figures is $330 m^2$ .

Learn more about significant figures here:

brainly.com/question/11904364?referrer=searchResults

brainly.com/question/17177568?referrer=searchResults

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2 years ago

1 pts<br> Which of the following gases would you predict to be least ideal?<br> Cu

umka2103 [35]

Explanation:

The gas that would behave least ideally is CO

5 0

2 years ago

What is the mass of a substance in 0.5 mol of nh3​

What is the mass of a substance in 0.5 mol of nh3