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3 years ago

What is a closed container in relation to the law of conservation of mass

1 answer:

5 0

The law of conservation of mass<span> states that </span>mass<span> in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.

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Adding an oxygen atom to a carbon atom in an organic molecule causes the carbon atom to become more?

Marat540 [252]

Answer:

diluted or stronger

Explanation:this is caused by the addition of oxygen and it is normally overbearing of ends up changing the whole molecule

3 0

3 years ago

Why is the atmosphere important to life on Earth?

Salsk061 [2.6K]

Answer:

Explanation:

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3 years ago

12. The vapor pressure of water at 90°C is 0.692 atm. What is the vapor pressure (in atm) of a solution made by dissolving 3.68

luda_lava [24]

Answer : The vapor pressure (in atm) of a solution is, 0.679 atm

Explanation : Given,

Mass of $H_2O$ = 1.00 kg = 1000 g

Moles of $CsF$ = 3.68 mole

Molar mass of $H_2O$ = 18 g/mole

Vapor pressure of water = 0.692 atm

First we have to calculate the moles of $H_2O$ .

$\text{Moles of }H_2O=\frac{\text{Mass of }H_2O}{\text{Molar mass of }H_2O}=\frac{1000g}{18g/mole}=55.55mole$

Now we have to calculate the mole fraction of $H_2O$

$\text{Mole fraction of }H_2O=\frac{\text{Moles of }H_2O}{\text{Moles of }H_2O+\text{Moles of }CsF}=\frac{55.55}{55.55+3.68}=0.938$

Now we have to partial pressure of solution.

According to the Raoult's law,

$P_{Solution}=X_{H_2O}\times P^o_{H_2O}$

where,

$P_{Solution}$ = vapor pressure of solution

$P^o_{H_2O}$ = vapor pressure of water = 0.692 atm

$X_{H_2O}$ = mole fraction of water = 0.938

$P_{Solution}=X_{H_2O}\times P^o_{H_2O}$

$P_{Solution}=0.938\times 0.692atm$

$P_{Solution}=0.649atm$

Therefore, the vapor pressure (in atm) of a solution is, 0.679 atm

5 0

3 years ago

If an object has a mass of 25g and a volume of 5cm what is the density

sergij07 [2.7K]

Density= 5m^3

Explanation:

Here, the Mass of an object is 25g

To convert grams into kilograms, we need to divide 25 by 1000

so, the 25g=25/1000 = 0.025kg.

The volume of an object is given by 5cm^3 ( cubic centimetre)

To convert cubic centimetre to meter cube, we need to divide 5 by 1000.

So, 5cm^3=5/1000=0.005m^3

Finally, the equation of density is

DENSITY= MASS/VOLUME

Density = 0.025/0.005

= 5m^3

Hence, the density of the object is 5m^3.

5 0

3 years ago

Newton used a prism to discover that white light is made up of a ______ of different colors? Plz help

miss Akunina [59]

Red orange yellow green blue and violet

8 0

3 years ago