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2 years ago

Granite forms when magma cools slowly underground. Granite _____.

1 answer:

3 0

Granite forms when magma cools slowly underground. Granite is an intrusive igneous rock. The answer is letter B. granite is composed mostly of quartz and feldspar with minor amounts of mica, amphiboles and other minerals.

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Part 1: A cylinder containing 20.0 L of compressed nitrogen is connected to an empty (evacuated) vessel with an unknown volume.

baherus [9]

Answer:

The volume of the vessel is 250 L

Partial pressure of hydrogen = 189 torr

Explanation:

Using Boyle's law

${P_1}\times {V_1}={P_2}\times {V_2}$

Given ,

V₁ = 20.0 L

V₂ = ?

P₁ = 25 atm

P₂ = 2 atm

Using above equation as:

${P_1}\times {V_1}={P_2}\times {V_2}$

${25}\times {20.0}={2}\times {V_2}$

${V_2}=\frac {{25}\times {20.0}}{2}\ L$

${V_2}=250\ L$

<u>The volume of the vessel is 250 L.</u>

According to Dalton's law of partial pressure:-

$P_{H_2}=Mole\ fraction\times Total\ Pressure$

So, according to definition of mole fraction:

$Mole\ fraction\ of\ H_2=\frac {n_{H_2}}{n_{H_2}+n_{He}}$

Also,

Mole fraction of H₂ = 1 - Mole fraction of He = 1 - 0.75 = 0.25

So,

Total pressure = 756 torr

Thus,

$P_{H_2}=0.25\times 756\ torr$

<u>Partial pressure of hydrogen = 189 torr.</u>

7 0

3 years ago

Fill in the missing in information: (protons, electrons, atomic#, or

zloy xaker [14]

Answer:

sorry po Hindi ko po alam

3 0

2 years ago

How many atoms are there in 23g of Na? How would I attempt this question. Thanks

Pavlova-9 [17]

Avodagros number i.e. 6.023 ×10^23

4 0

2 years ago

Read 2 more answers

How many atoms are in 35g of water?

Helga [31]

Explanation:

nH2O=35/18

xH2O=35/18x6.02x10 powered by 23

so, the answer is

$11.70556 \times {10}^{23}$

im sry if im wrong

8 0

2 years ago

How did the discovery of isotopes help to lead to a revised model of atomic structure?

Arte-miy333 [17]

Dalton postulated that atoms of the same elements had the same mass while atoms of different elements had different masses.

The discovery of isotopes revealed that atoms of the same element did not necessarily have same masses, they could have different masses.

Therefore, the modern periodic table that we use nowadays contains the average atomic mass of all the isotopes found for a given element.

8 0

3 years ago