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3 years ago

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A rectangular field measures 6.0 m by 8.0 m. What is the area of the field in square centimeters (cm 2 )? Use the formula: Area

= length × width.
A: 4.8 × 10 4 cm 2

B: 4.8 × 10 5 cm 2

C: 4.8 × 10 3 cm 2

1 answer:

Lera25 [3.4K]3 years ago

7 0

The answer is C

6.0m x 8.0m= 48.0m

then converting it to cm by multiply
48 x 100

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Sample A: 300 mL of 1M sodium chloride

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sample B contains the larger density

Explanation:

Given;

volume of sample A, V = 300 mL = 0.3 L

Molarity of sample A, C = 1 M

volume of sample B, V = 145 mL = 0.145 L

Molarity of sample B, C = 1.5 M

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Molarity is given as;

$C = \frac{moles \ of \ solute, \ mol}{liters \ of \ solvent} \\\\Moles \ of \ solute \ for \ sample \ A = 1 \times 0.3 = 0.3 \ mol\\\\Moles \ of \ solute \ for \ sample \ B = 1.5 \times 0.145 = 0.2175 \ mol$

The reacting mass for sample A = 0.3mol x 58.5 g/mol = 17.55 g

The reacting mass for sample B = 0.2175 mol x 58.5 g/mol = 12.72 g

The density of sample A $= \frac{mass}{volume} = \frac{17.55}{0.3} = 58.5 \ g/L$

The density of sample B $= \frac{mass}{volume} = \frac{12.72}{0.145} = 87.72 \ g/L$

Therefore, sample B contains the larger density

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