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Alex17521 [72]
3 years ago
15

27 Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!

Chemistry
1 answer:
zvonat [6]3 years ago
3 0

<em>Hello Human!!</em>

<em>The answer is below!!</em>

<em>-------------------------------------------------------------------------------------------------------</em>

<em>14. </em><em>The answer is </em><em>C. </em><em>Mass</em>

<em>15. </em><em>I think the right answer is </em><em>C. </em><em>Melting point</em>

<em>16. </em><em>I don't know this is right.... </em><em>D. </em><em>Ability to oxidize </em>

<em>17. </em><em>I also don't know this right as well... So </em><em>A. </em><em>Generally, a gas is in the gaseous state at room temperature and a vapor is in either the  solid state or liquid state at room temperature.</em>

<em>P.S </em><em>Tell me if this wrong....</em>

<em />GoodLuck!!<em />

<em>#</em>Be<em> </em>Bold<em />

<em>#</em>LearnWithBrainlyAlways<em />

<em />_{Itbrazts}<em />

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How many moles of xenon gas, Xe, would occopy 37.8L at stp
Charra [1.4K]

Answer:

The number of moles of  xenon are 1.69 mol.

Explanation:

Given data:

Number of moles of xenon = ?

Volume of gas = 37.8 L

Temperature = 273 K

Pressure = 1 atm

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will put the values in formula.

1 atm × 37.8 L = n ×  0.0821 atm.L/ mol.K   ×273 K

37.8 atm.L =  n × 22.413 atm.L/ mol.

n = 37.8 atm.L /  22.413 atm.L/ mol.

n = 1.69 mol

The number of moles of  xenon are 1.69.

8 0
3 years ago
Which observation supports the claim that Earth's plates move?
Contact [7]

Answer:

B)Continents look like they fit together

4 0
2 years ago
The conductance of the electric current through the electrolytic solution increases with
zheka24 [161]

The conductance of the electric current through the electrolytic solution increases with increase in concentration.

<h3>What is electrolytic solution?</h3>

Electrolytic solutions are solutions that are capable of conducting an electric current due to presence of ions.

The current flowing in an Electrolytic solutions is calculated as;

Q = It

I = Q/t

where;

  • Q is charges

Increase in the concentration of the charges, increases the amount of charges in the solution and hence the conductance of the solutions will increase as well.

Learn more about Electrolytic solutions here: brainly.com/question/14654936

#SPJ1

7 0
2 years ago
Humans first appeared in the _____ period.
Ira Lisetskai [31]

Answer:

They first appeared in the fossil record around 66 million years ago, soon after the Cretaceous–Paleogene extinction event that eliminated about three-quarters of plant and animal species on Earth, including most dinosaurs.

Explanation:

6 0
3 years ago
Read 2 more answers
A sample of an alloy of aluminum contains 0.0898 mol Al and 0.0381 mol Mg. What are the mass percentages of Al and Mg in the all
blondinia [14]

Answer:

Al 72.61%

Mg 27.39%

Explanation:

To obtain the mass percentages, we need to place the individual masses over the total mass and multiply by 100%.

If we observe clearly, we can see that the parameters given are the moles. We need to convert the moles to mass.

To do this ,we need to multiply the moles by the atomic masses. The atomic mass of aluminum is 27 while that of magnesium is 24.

Now, the mass of aluminum is thus = 27 * 0.0898 = 2.4246g

The mass of magnesium is 0.0381 * 24 = 0.9144g

We can now calculate the mass percentage.

The total mass is 0.9144 + 2.4246 = 3.339g

% mass of Al = 2.4246/3.339 * 100 = 72.61%

% mass of Mg = 0.9144/3.39 * 100 = 27.39%

7 0
3 years ago
Read 2 more answers
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