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Rom4ik [11]
3 years ago
14

What is the atomic number of an oxygen atom with 8 protons and 10 neutrons in the nucleus.

Chemistry
1 answer:
Papessa [141]3 years ago
5 0
The atomic number is always equal to the number of protons. Therefore, the atomic number of Oxygen is 8.
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How many moles of nitrogen gas are there in 16.8 L of this gas at STP?
sweet-ann [11.9K]
According to Avogadro's Law, same volume of any gas at standard temperature and pressure will occupy same volume. And one mole of any Ideal gas occupies 22.4 dm³ (1 dm³ = 1 L).

Data Given:

                  n = moles = ?
                  V = Volume = 16.8 L

Solution:
               
As 22.4 L volume is occupied by one mole of gas then the 16.8 L of this gas will contain....

                           = ( 1 mole × 16.8 L) ÷ 22.4 L
                    
                           = 0.75 moles

Result:
           
16.8 L of Nitrogen gas will contain 0.75 moles at standard temperature and pressure.
4 0
3 years ago
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Anastaziya [24]
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5 0
3 years ago
To convert from mass of A to moles of B in a stoichiometry problem, the following steps are followed:
taurus [48]

Answer:

b. mass A → moles A → moles B

Explanation:

hope this helps

4 0
3 years ago
What is the mass of 4,48 L of SO2 at STP?
Trava [24]

Answer:

2 moles

Explanation:

Hi there !!

Given volume = 44.8 litres

Molar volume = 22.4 litres

No: of moles = Given volume / Molar volume

                    = 44.8 / 22.4 = 2 moles

3 0
2 years ago
Read 2 more answers
A balloon of hydrogen is subjected to vacuum. The initial pressure and volume of hydrogen is 0.95 atm and 0.55 L. Calculate the
Scilla [17]

Answer:

0.43 atm

Explanation:

From the question given above, the following data were obtained:

Initial pressure (P₁) = 0.95 atm

Initial volume (V₁) = 0.55 L

Final volume (V₂) = 1.22 L

Final pressure (P₂) =?

The final pressure of the gas can be obtained by using the Boyle's law equation as follow:

P₁V₁ = P₂V₂

0.95 × 0.55 = P₂ × 1.22

0.5225 = P₂ × 1.22

Divide both side by 1.22

P₂ = 0.5225 / 1.22

P₂ = 0.43 atm

Therefore, the final pressure of the gas is 0.43 atm

7 0
2 years ago
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