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DiKsa [7]
3 years ago
12

3Nitrogen obtained in the laboratory is collected over water.why?​

Chemistry
1 answer:
Cloud [144]3 years ago
8 0
Because displacement of water is the convenient way to obtain gas.
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How many joules are required to melt 100 grams of water? The heat of
vova2212 [387]
Answer- 33.4 kJ


Explanation-

100 g H2O x (1mol/18g) = 5.5 mol

q=(5.5 mol)(6.01 KJ/mol)= 33.4 kJ
4 0
3 years ago
The value of Kp for the reaction NO(g) 1 1 2 O2(g) 4 NO2(g) is 1.5 3 106 at 25°C. At equilibrium, what is the ratio of PNO2 to P
expeople1 [14]

Answer : The ratio of p_{NO_2} to p_{NO} is, 6.87\times 10^5

Solution :  Given,

K_p=1.5\times 10^6

p_{O_2} = 0.21 atm

The given equilibrium reaction is,

NO(g)+\frac{1}{2}O_2\rightleftharpoons NO_2(g)

The expression of K_p will be,

K_p=\frac{(p_{NO_2})}{(p_{NO})\times (p_{O_2})^{\frac{1}{2}}}

Now put all the given values in this expression, we get:

1.5\times 10^6=\frac{(p_{NO_2})}{(p_{NO})\times (0.21)^{\frac{1}{2}}}

\frac{(p_{NO_2})}{(p_{NO})}=(1.5\times 10^6)\times (0.21)^{\frac{1}{2}}

\frac{(p_{NO_2})}{(p_{NO})}=6.87\times 10^5

Therefore, the ratio of p_{NO_2} to p_{NO} is, 6.87\times 10^5

5 0
3 years ago
Will mark as Brainliest.
postnew [5]
<span>0.453 moles O2 is the solution</span>
3 0
3 years ago
Read 2 more answers
Help me on this question esplain
son4ous [18]

Answer:

They have the same number of valence electrons (5) so the body assumes they are the same element.

3 0
3 years ago
An element has an atomic number of 30. How many protons and electrons are in a neutral atom of the element? A. 30 protons, 30 el
Minchanka [31]
Atomic number shows the number of protons in an atom's nucleus. If the atomic number is 30, then it has 30 protons. The question says it is neutral, so it must have the same amount of protons and electrons.

A is the correct answer based on this. 
7 0
3 years ago
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