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3 years ago

Based on the kinetic theory, which statement is true?

Chemistry

2 answers:

Effectus [21]3 years ago

7 0

answer is A

The kinetic theory is used to explain the behaviour of gases.

One of the assumptions states that "a gas is composed of a large number of identical molecules moving at different speeds".

Mariulka [41]3 years ago

3 0

Answer:

The particles of matter are arranged in different ways for the different states.

Explanation:

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Which of the following exerts the greatest pressure on the ground?

NikAS [45]

Pressure = (weight) / (area supporting the weight).

From the fraction, you can see that <em>more weight </em>produces more pressure,
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That would be the 55-kg boy, standing on one foot.

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4 years ago

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Calculate the number of moles of magnesium used in trial 1. the molar mass of magnesium is 24.305 g/mol.

Whitepunk [10]

In order for us to help we need more information. Possibly the amount of grams you used for Mg in trial 1 or something similar to this.

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3 years ago

A piece of brass is found to have a mass of 24.32 g. When placed in a graduated cyclinder with an initial reading of 5.60 mL the

Jobisdone [24]

Answer:

$\rho=3.1g/mL$

Explanation:

Hello,

In this case, considering that the density of a body is computed given its mass and volume:

$\rho =\frac{m}{V}$

Taking into account that the mass is 24.32 g and the volume is computed via the difference between the volume of the water with the brass and the volume of water by itself as follows:

$V=13.50mL-5.60mL=7.9mL$

The density of the piece of brass turns out:

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3 years ago

Assuming the materials don't mix, show how the materials would "stack up" in a graduated cylinder. (Based on their densities) (J

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3 years ago

In an accident, a solution containing 2.5 kg of nitric acid was spilled. Two kilograms of Na2CO3 was quickly spread on the area

storchak [24]

First we must write a balanced chemical equation for this reaction

$Na_2CO_3 _(_a_q_)+ 2HNO_3_(_a_q_) \implies 2NaNO_3_(_s_) + CO_2_(_g_) + H_2O_(_l_)$

The mole ratio for the reaction between $HNO_3$ and $Na_2CO_3$ is 1:2. This means 1 moles of $Na_2CO_3$ will neutralize 2 moles $HNO_3$ . Now we find the moles of each reactant based on the mass and molar mass.

$2500g HNO_3 \times \frac{mol}{63.01g\ HNO_3} = 39.67 mol\ HNO_3$

$2000g\ Na_2CO_3 \times \frac{mol}{105.99g \ Na_2CO_3} = 18.87 mol\ Na_2CO_3$

$\frac{18.87 mol Na_2CO_3}{39.67\ HNO_3} = \frac{1 molNa_2CO_3}{2 mol HNO_3}$

The $Na_2CO_3$ was enough to neutralize the acid because 18.87:39.67 is the same as 1:2 mol ratio.

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4 years ago