3 years ago

I need a Help plz! It’s my final exam!

1 answer:

7 0

Um i think gold... i think?

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harina [27]

I think it is C species and heredity

5 0

3 years ago

nikklg [1K]

The focal length, like you said it's the distance between the FOCAL point and the mirror.

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3 years ago

Schach [20]

<u>Answer:</u> The amount of water required to prepare given amount of salt is 398.4 mL

<u>Explanation:</u>

To calculate the volume of solution, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Molarity of solution = 0.16 M

Given mass of manganese (II) nitrate tetrahydrate = 16 g

Molar mass of manganese (II) nitrate tetrahydrate = 251 g/mol

Putting values in above equation, we get:

$0.16M=\frac{16\times 1000}{251\times \text{Volume of solution}}\\\\\text{Volume of solution}=\frac{16\times 1000}{251\times 0.16}=398.4mL$

Volume of water = Volume of solution = 398.4 mL

Hence, the amount of water required to prepare given amount of salt is 398.4 mL

4 0

3 years ago

defon

A. Gamma radiation because it reaches further than beta and alpha rays

8 0

3 years ago

Fofino [41]

Answer:

802.69 g

Explanation:

The molar mass of Barium nitrite is 229.34 g/mol, so 3.5 moles of it will have a mass of ...

3.5 mol × 229.34 g/mol = 802.69 g

8 0

3 years ago