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3 years ago

When a sample of CO2 solid becomes CO2 gas there is a change in

Chemistry

1 answer:

notka56 [123]3 years ago

5 0

Volume and state of matter

Explanation:

When sample solid change to gas, there is a phase change known as sublimation.

We can conclude that the state of matter has changed from solid to gases.

There is an increase in entropy and the particles becomes more random.

There is little to no force of attraction between the particles.

There is also a volume change because gases have no fixed shape. They just fill containers that holds them.

The mass of the gases will remain the same as that of the solid carbon dioxide. Mass is a function of the particles in compound.

We can also agree that the kinetic energy has increased considerably.

Learn more:

Phase change brainly.com/question/1875234

#learnwithBrainly

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Which of the following would absorb the most sunlight?

MrRa [10]

The tshirt that is going to absorb most amount of sunlight is the black t-shirt. This is because its reflectivity is almost zero that it is not capable of reflecting back the light to the surface. This is the very reason why we are feeling so warm when we wear a black t-shirt.

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3 years ago

How many grams of H2O will be formed when 32.0 g H2 is mixed with 84.0 g of O2 and allowed to react to form water

Zarrin [17]

Answer:

94.58 g of $H_2O$

Explanation:

For this question we have to start with the reaction:

$H_2~+~O_2~->~H_2O$

Now, we can balance the reaction:

$2H_2~+~O_2~->~2H_2O$

We have the amount of $H_2$ and the amount of $O_2$ . Therefore we have to find the limiting reactive, for this, we have to follow a few steps.

1) Find the moles of each reactive, using the molar mass of each compound ( $H_2~=~2~g/mol~~O_2=~32~g/mol$ ).

2) Divide by the coefficient of each compound in the balanced reaction ("2" for $H_2$ and "1" for $O_2$ ).

Find the moles of each reactive

$32.0~g~H_2\frac{1~mol~H_2}{2~g~of~H_2}=15.87~mol~H_2$

$84.0~g~of~O_2\frac{1~mol~of~O_2}{32~g~of~O_2}=2.62~mol~of~O_2$

Divide by the coefficient

$\frac{15.87~mol~H_2}{2}=7.94$

$\frac{2.62~mol~of~O_2}{1}=2.62$

The smallest values are for $H_2$ , so hydrogen is the limiting reagent. Now, we can do the calculation for the amount of water:

$32.0~g~H_2\frac{1~mol~H_2}{2~g~of~H_2}\frac{2~mol~H_2O}{2~mol~H_2}\frac{18~g~H_2O}{1~mol~H_2O}=94.58~g~H_2O$

We have to remember that the molar ratio between $H_2O$ and $H_2$ is 2:2 and the molar mass of $H_2O$ is 18 g/mol.

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3 years ago

A sugar crystal contains approximately 1. 9×1017 sucrose (c12h22o11c12h22o11) molecules. part a what is its mass in mgmg ? expre

yKpoI14uk [10]

Sucrose is a disaccharide, which is a sugar molecule formed from two monosaccharides. In this case, the two monosaccharides are fructose and glucose.

Answer and Explanation:

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2 years ago

Deduce the molecular formula of hydrogen 18.2%, carbon 81.8%, relative molecular mass is 44

ivanzaharov [21]

Answer:

let number of carbon is an

Explanation:

hence 12 and + 2n is equal to 126

14 and is equal to 126

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2 years ago

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topjm [15]

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4 years ago