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2 years ago

9

Identify each layer of Earth as a solid or a liquid.

1 answer:

Anna71 [15]2 years ago

4 0

The crust is solid , the mantle is solid, the outer core is liquid, and the inner core is solid

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Which of the following reactions is a synthesis reaction?

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The first reaction is a synthesis reaction (A+B -> AB)

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2 years ago

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Which would have a greater density, 5 g of aluminum or 5 kg of aluminum if they were both the same temperature? Fully explain yo

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Answer:the 5g would be more dense due to the mass and structure

Of it causing the atoms to expand as heat gets added

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3 years ago

1. Of 100 animals on a farm, 20% are horses, 15 % are pigs, 30% are cows, and 35% are

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3 years ago

A steel container with a movable piston contains 2.00 g of helium which was held at a constant temperature of 25 °C. Additional

shtirl [24]

Answer: D) 1.00 g

Explanation:

According to the Avogadro's law, the volume of gas is directly proportional to the number of moles of gas at same pressure and temperature. That means,

$V\propto n$

or,

$\frac{V_1}{V_2}=\frac{n_1}{n_2}$

where,

$V_1$ = initial volume of gas = 2.00 L

$V_2$ = final volume of gas = 3.00 L

$n_1$ = initial moles of gas = $\frac{\text {Given mass of helium}}{\text {molar mass of helium}}=\frac{2.00g}{4g/mol}=0.500mol$

$n_2$ = final moles of gas = ?

Now we put all the given values in this formula, we get

$\frac{2.00L}{3.00L}=\frac{0.500mol}{n_2}$

$n_2=0.75mole$

Mass of helium = $moles\times {\text {molar mass}}=0.75\times 4=3.00g$

Thus mass of helium added = (3.00-2.00) g = 1.00 g

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3 years ago

What is number 1 for b, c, and d?

SVETLANKA909090 [29]

B because....................

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3 years ago