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o-na [289]
3 years ago
9

Billy is trying to figure out what type of wood to use for building a model boat. He has a block of wood with a volume of 8.0 cu

bic centimeters (cm) and a mass of 4.0 grams (g). What is the density of the block of wood in g/cmº to the nearest tenth? 0.5 2.0 4.0 32.0​
Chemistry
1 answer:
geniusboy [140]3 years ago
6 0

Answer:

ρ = 0.5 g/cm³

Explanation:

Step 1: Given data

Volume of the block of wood (V): 8.0 cm³

Mass of the block of wood (m): 4.0 g

Density of the block of wood (ρ): ?

Step 2: Calculate the density of the block of wood

The density of the block of wood is equal to its mass divided by its volume. The mathematical expression is:

ρ = m/V

ρ = 4.0 g/8.0 cm³

ρ = 0.5 g/cm³

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<u>Answer:</u> The final concentration of potassium nitrate is 5.70\times 10^{-6}M

<u>Explanation:</u>

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\text{Molarity of }KNO_3=\frac{0.360\times 1000}{101.1\times 500.0}\\\\\text{Molarity of }KNO_3=7.12\times 10^{-3}M

To calculate the molarity of the diluted solution, we use the equation:

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  • <u>Calculating for first dilution:</u>

M_1\text{ and }V_1 are the molarity and volume of the concentrated KNO_3 solution

M_2\text{ and }V_2 are the molarity and volume of diluted KNO_3 solution

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  • <u>Calculating for second dilution:</u>

M_2\text{ and }V_2 are the molarity and volume of the concentrated KNO_3 solution

M_3\text{ and }V_3 are the molarity and volume of diluted KNO_3 solution

We are given:

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Hence, the final concentration of potassium nitrate is 5.70\times 10^{-6}M

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