Answer:- C. 16.4 L
Solution:- The given balanced equation is:
From this equation, there is 2:1 mol ratio between HCl and hydrogen gas. First of all we calculate the moles of hydrogen gas from given grams of HCl using stoichiometry and then the volume of hydrogen gas could be calculated using ideal gas law equation, PV = nRT.
Molar mass of HCl = 1.008 + 35.45 = 36.458 gram per mol
The calculations are shown below:
=
Now we will use ideal gas equation to calculate the volume.
n = 0.672 mol
T = 25 + 273 = 298 K
P = 101.3 kPa = 1 atm
R =
PV = nRT
1(V) = (0.672)(0.0821)(298)
V = 16.4 L
From calculations, 16.4 L of hydrogen gas are formed and so the correct choice is C.
Answer:
A strong alkali is 100% ionised.eg÷sodium hydroxide.
A week alkali is not 100% ionised.eg÷ammonia
A concentrated acid contains a large amount of acid in a given volume.
The sum of the partial pressures in a mixture of gasses is the total pressure of the mixture.
So
4.1 atmospheres + partial pressure of other gas = 5.7 atmospheres
5.7 - 4.1 = 1.6 atmospheres
1.6 atmospheres is therefore the partial pressure of the other gas in the mixture.
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Mass of water*specific heat of water(tf-0)=-mass of water(negative)*specific heat of water(tf-100)
That should do
Explanation:
Perform the following operation
and express the answer in
scientific notation.
5.4x103 x 1.2x107