The number of mole will be 65.81 mole.
An ideal gas would be one for which both the overall volume of the molecules and even the forces that exist between them are so negligible as to have no influence on the behavior of something like the gas.
Number of ideal gas can be calculated by using the formula:
PV = nRT
where, p is pressure, n is number of mole, R is gas constant and T is temperature.
Given data:
V= 1750 
= 1750 L
P = 125,000 p = 1.2 atm
R = 0.082 L /mole kelvin
T = 273+127 = 400 K
Now, put the value of given data in above equation.
1.23atm x 1750L = n x 0.0820atm x Liter/ mole x kelvin x 400K
n = 65.81 mole.
Therefore, the number of mole will be 65.81 mole
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2
refer to periodic table for explanation
The mass number is the total number of protons and neutrons in a nucleus of an element. The average atomic mass is the sum of the masses of an element's isotopes, each multiplied by their abundance.
We are given with
<span>1.80 × 10–4 g K2SO4
</span><span>1.50 L of water
The concentration of K2SO4 is
</span>1.80 × 10–4 g K2SO4 x (1 mole K2SO4 / 174 g K2SO4) x (1 / 1.50 L)
= 6.897 x 10-7 M
Since K2SO4 dissociates into
K2SO4 <=> 2K+ + SO4-2
The concentration of K+ ions is
2 x 6.897 x 10-7 M = 1.379 x 10-6 M
The concentration of SO4-2 is the same as that of K2SO4
1.379 x 10-6 M
Answer:
2.21m
Explanation:
Molality, m, is defined as the ratio between moles of solute (The substance that is in less amount, sodium sulfide) and kilograms of solvent (Water, in this case).
Thus, we need to convert mass of sodium sulfide to moles using its molar mass and grams of water to kilograms:
<em>Moles Na2S (Molar mass: 78.0452g/mol):</em>
37.5g * (1mol / 78.0452g) = 0.48 moles Na2S
<em>Kilograms water:</em>
217g * (1kg / 1000g) = 0.217kg
Molality:
0.48 moles Na2S / 0.217kg =
<h3>2.21m</h3>
