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3 years ago

Can anybody help me with these 2 ohms law

Chemistry

1 answer:

Fynjy0 [20]3 years ago

3 0

Answer:

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This drawing shows a human body system.

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Explanation:

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3 years ago

What are the primary colors?

guapka [62]

The primary colors are blue, red, and yellow.

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3 years ago

If you have 16 g of manganese (II) nitrate tetrahydrate, how much water is required to prepare 0.16 M solution from this amount

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

How many grams of fluorine are needed to react with 8.5g of phosphorus?

love history [14]

Step 1: write the equation:

P₄(s) + 6F₂(g) → 4PF₃(g)

Step 2: Molar mass of P₄ = 30.97 g/mol × 4 = 123.88 g/mol

Step 3: Number of moles of phosphorus

n = m/M

n = 8.5 g/123.88g/mol

n = 0.07 moles

Step 4: 0.07 × 12 = 0.84 moles of fluorine.

Fluorine is diatomic gas so we multiplied the number of moles by 12.

Step 5: To find the mass of fluorine we multiply the number of moles with the molar mass.

Mass of fluorine = 0.84 × 228

= 191.52 grams.

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3 years ago

An insect population increases and then decreases as the food supply changes.

Arada [10]

Answer:

self regulation

Explanation:

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3 years ago

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