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3 years ago

10

When a balloon containing 635 mL of air is taken from sea level (at standard pressure) to a higher altitude, the balloon expands

to 829 mL. What is the air pressure at this new altitude (in atm)?

1 answer:

Fiesta28 [93]3 years ago

8 0

Answer:

0.766atm

Explanation:

Boyles law

P1V1=P2V2

1×635=P2×829

P2=635/829

P2=0.766atm

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Hydrogen atoms fuse together to form helium atoms. This releases a huge amount of energy in the form of _______ and ______. (cal

WARRIOR [948]

Answer:

Hydrogen atoms fuse together to form helium atoms. This releases a huge amount of energy in the form of Kinetic energy of the alpha particle and Electromagnetic radiation.

Explanation:

Nuclear Fusion is the Nuclear process in which the energy is produced when two lighter elements are collided together which are having some kinetic energy in them after that the two lighter nuclei will fuse together into a single heavier nuclei. This is opposite to what happens in Fission process in which the breaking up of atomic specie happens.

Both Nuclear Fission and Nuclear fission occurs with the release of massive amount of energy.

There are conditions for nuclear fusion to happens like, it requires 100 million's kelvin of temperature, also fusion will occur when the pressure is very high because increased pressure will result into squeezing of the atomic specie and hence they will fuse.

When the Hydrogen atom fuse together to form helium atoms. This release a huge amount of energy in the form of Kinetic energy of the alpha particle and Electromagnetic radiation.

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3 years ago

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Answer:

1.Sulfur dioxide and nitrogen oxide

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3 years ago

A 10 M concentrated stock solution of NaCl was used to prepare 5 liters of diluted 1 M solution. Which of the following statemen

Anon25 [30]

Answer: D.) The volume of stock solution used was more than 5 liters

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3 years ago

Read 2 more answers

How many grams of magnesium oxide can be produced if 25.0 g of magnesium are allowed to react with 28 g of oxygen?

Ivanshal [37]

Answer : The mass of $MgO$ produced is, 41.68 grams.

Explanation : Given,

Mass of $Mg$ = 25.0 g

Mass of $O_2$ = 28 g

Molar mass of $Mg$ = 24 g/mol

Molar mass of $O_2$ = 32 g/mol

First we have to calculate the moles of $Mg$ and $O_2$ .

$\text{Moles of }Mg=\frac{\text{Given mass }Mg}{\text{Molar mass }Mg}$

$\text{Moles of }Mg=\frac{25.0g}{24g/mol}=1.042mol$

and,

$\text{Moles of }O_2=\frac{\text{Given mass }O_2}{\text{Molar mass }O_2}$

$\text{Moles of }O_2=\frac{28g}{32g/mol}=0.875mol$

Now we have to calculate the limiting and excess reagent.

The balanced chemical equation is:

$2Mg+O_2\rightarrow 2MgO$

From the balanced reaction we conclude that

As, 2 mole of $Mg$ react with 1 mole of $O_2$

So, 1.042 moles of $Mg$ react with $\frac{1.042}{2}=0.521$ moles of $O_2$

From this we conclude that, $O_2$ is an excess reagent because the given moles are greater than the required moles and $Mg$ is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of $MgO$

From the reaction, we conclude that

As, 2 mole of $Mg$ react to give 2 mole of $MgO$

So, 1.042 mole of $Mg$ react to give 1.042 mole of $MgO$

Now we have to calculate the mass of $MgO$

$\text{ Mass of }MgO=\text{ Moles of }MgO\times \text{ Molar mass of }MgO$

Molar mass of $MgO$ = 40 g/mole

$\text{ Mass of }MgO=(1.042moles)\times (40g/mole)=41.68g$

Therefore, the mass of $MgO$ produced is, 41.68 grams.

4 0

4 years ago

What is the valence of oxygen

leva [86]

Answer:

-2

Explanation:

eACH ELEMENT HAS AN SPECIFIC VALENCE, FOR EXAMPLE, CARBON (+2),+4 IN THE CASE OF OXYGEN IS -2

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3 years ago