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irina1246 [14]
2 years ago
10

Help pls you get 22 points if you answer me

Chemistry
1 answer:
snow_tiger [21]2 years ago
5 0

Answer:

the 2nd one

Explanation:

All other symbols are for Mathematics.

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Is atmosphere nitrogen denser than pure nitrogen​
marusya05 [52]

Answer:

Atmospheric nitrogen is not heavier than chemical nitrogen, largely because “chemical nitrogen” is ultimately derived from atmospheric nitrogen. On the other hand, you could be asking why the atomic mass of nitrogen is not the same as the mass of nitrogen gas; that's because gaseous nitrogen is diatomic, .

Explanation:

This is from Google.

Hope this helps :))

7 0
3 years ago
Look at this balanced chemical reaction: N2 + 3H2 2NH3
stepladder [879]

Answer: A mass of 124457.96 g ammonia is produced by reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm.

Explanation:

Given: Volume = 450 L

Temperature = 450 K

Pressure = 300 atm

Using ideal gas equation, moles of nitrogen are calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = tempertaure

Substitute values into the above formula as follows.

PV = nRT\\300 atm \times 450 L = n \times 0.0821 L atm/mol K \times 450 K\\n = \frac{135000}{36.945}\\= 3654.08 mol

According to the given equation, 1 mole of nitrogen forms 2 moles of ammonia. So, moles of ammonia formed by 3654.08 moles of nitrogen is as follows.

2 \times 3654.08 mol\\= 7308.16 mol

As moles is the mass of substance divided by its molar mass. So, mass of ammonia (molar mass = 17.03 g/mol) is as follows.

Moles = \frac{mass}{molar mass}\\7308.16 = \frac{mass}{17.03 g/mol}\\mass = 124457.96 g

Thus, we can conclude that a mass of 124457.96 g ammonia is produced by reacting a 450 L sample of nitrogen gas at a temperature of 450 K and a pressure of 300 atm.

8 0
3 years ago
What is rust and give two methods that can be usedto prevent ​
SOVA2 [1]

Answer:

rust is a substance formed on iron coated when it reacts with water and its miosture.

two general method are--

1.after u make any object of iron wet make it dry fast.

2. coat its surface with paint or apply grease, oil or varnish.

3.also by Rusting of iron can be prevented by galvanization.

4 0
3 years ago
Read 2 more answers
According to dalton's model, the atom is a solid sphere. What would the alpha particles do when they hit the floor gold foil if
tester [92]
The alpha particle would be attracted to the atom<span />
5 0
3 years ago
Which of the following properties of matter is independent of its location?
drek231 [11]
The answer is mass. 
Mass is the amount of matter in an object. So no matter where the object is, it mass will stay the same unless particles are increased. 
7 0
2 years ago
Read 2 more answers
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