Answer: Molecular Formulas. Molecular formulas are a compact chemical notation that describe the type and number of atoms in a single molecule of a compound. Identify the molecular formula of a compound given either its name or structural formula.
Explanation:
atm. What is the partial pressure (atm) of argon?
Joseph Proust
Ernest Rutherford
J. J. Thomson
Answer:
J.J. Thomson
Explanation:
Answer:
D
Explanation:
took the test
What is the total number of moles of C that must completely react to produce 2.0 moles of C2H6?
(1) 1.0 mol (3) 3.0 mol
(2) 2.0 mol (4) 4.0 mol
Answer: The correct answer is option 4.
Explanation:
According to the reaction, 1 mol of is obtained from 2 moles of C gives
Then, 2 moles of will be obtained from:
moles of C =4 moles
Hence, the correct answer is option 4.
Answer : The diatomic gas is nitrogen gas, N₂.
Explanation :
First we have to calculate the moles of gas.
Using ideal gas equation:
where,
P = Pressure of gas = 1.00 atm
V = Volume of gas = 4.4 L
n = number of moles of gas = ?
R = Gas constant =
T = Temperature of gas =
Putting values in above equation, we get:
Now we have to calculate the molar mass of gas.
As we are given that the gas is diatomic X₂.
As, 2 atoms of gas X has mass = 28.07 g/mol
So, 1 atom of gas will have mass =
From this we conclude that the nitrogen atom has mass of 14.04 g/mol.
Thus, the diatomic gas is nitrogen gas, N₂.