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Vlad [161]
1 year ago
5

A student added 3 g of melted wax to a container that weighed 15 g. What is the weight of the container after the wax hardens?

Chemistry
1 answer:
koban [17]1 year ago
6 0

The weight of the container after the wax hardens is 0.18 N.

<h3>What is the law of conservation of mass?</h3>

We know that according to the law of the conservation of mass, the mass of an object can neither be created nor destroyed but it can be changed from one form to the other.

Looking at this law, we know that the mass would not change even after the time that the wax must have hardened. The total mass of the wax would have to be a constant.

Total mass would now be;

Mass of the wax + mass of the container

= 3 g + 15 g

= 18 g

Weight = 18/1000 * 9.8 m/s^2

= 0.18 N

Learn more about mass:brainly.com/question/13383562

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The nuclear disintegration series of 238-U is the source of radon-222 in soil.

<h3>What is nuclear disintegration ?</h3>
  • The process of nuclear disintegration is how an unstable atomic nucleus loses energy through radiation.
  • A substance that has unstable nuclei is regarded as radioactive.
  • Alpha, beta, and gamma decay are three of the most prevalent types of decay, and they all entail the emission of one or more particles.
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2 years ago
4.3.6 Quiz: Calculating with Balanced Equations
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Answer:

B.) The coefficients give the molar ratio of the reactants.

Explanation:

The coefficients represent how many of each molecule are within a reaction. Coefficients are added to make sure the amounts of each element are the same on both sides of the reaction. You can use the coefficients to convert between moles of each molecule. As such, the best answer is B.) because coefficients are what allow you to construct a mole ratio.

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Which of the following chemicals can damage the central nervous system, cardiovascular system, reproductive system, hematologica
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Answer : Option B) Lead

Explanation : Lead is chemical element which damages<span> the central nervous system, cardiovascular system, reproductive system, hematological system, and kidneys with overexposure as compared to other elements in the given option.</span>
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Provided is a diagram showing forces on a box.
Eduardwww [97]

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5 N left

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3 years ago
A 78.0 sample of gold at 175°C is put in a foam cup calorimeter with 25.0 g of water at 25.0°C. Calculate the specific heat of t
Nady [450]

The answer is the specific heat of the gold is 0.129 J/gC .

<h3>What is Calorimetry ?</h3>

It is an experimental method that allows one to calculate the heat change in a chemical process.

Calorimeter is just a reaction vessel. It could be a foam cup, a soda can, or a commercially available bomb calorimeter

Where q represents the heat change in the reaction, the calorimeter and the water. Since you are only measuring temperature, you will need to calculate the heat using it.

The change in heat of the gold is given by:

\rm q_{gold} = m c_{gold}\Delta T

=78 \times c_{p}\times (175-38.18)

The change in heat of the water is given by:

\rm q_{water} = mc_{p}\Delta T

m is the mass of water in the calorimeter in grams,

and delta T is the change in temperature.

where \rm c_{p} is the specific heat of water, which is 4.184 J/gC

mass of water =  25 g of water.

Temperature T₁ = 25°C

Final Temperature = 38.18 °C

Difference between temperature = 13.18 °C

\rm q_{water} = 25 \times 4.18\times 13.18

For a Foam Cup Calorimeter

\rm q_{water} = q_{cal}\\\\\\\rm 25\times4.18\times13.318 = 78 \times c_{p}\times (175-38.18)\\\\\\On \;solving\; this \;we \;get  \;c_{p} =  0.129

Therefore the  the specific heat of the gold is 0.129 J/gC

To know more about Calorimeter

brainly.com/question/4802333

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4 0
2 years ago
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