We know the volume of one mole of gas at 273 K and 760 Torr is 22.4 L. Using
(PV)/T = constant
We can calculate the volume of the gasses at the given conditions:
(P₁V₁)/T₁ = (P₂V₂)/T₂
(760 * 22.4) / 273 = (288 V₂) / 308.2
V₂ = 66.7 L
Mass of He: 4
Mass of Ne: 20
Fraction of Ne: x
Fraction of He: 1 - x
avg density = (∑(component fraction × component mass))/volume
0.2460 = (20x + 4(1 - x))/ 66.7
x = 0.775
Answer:
Wavelength of sound waves millimetres
Explanation:
The speed of any wave is equal to the product of its wavelength and frequency.
This can be represented mathematically as
Where
V is the speed of sound waves
f is the frequency of sound waves
and
is the wavelength of the sound waves.
Substituting the given values in above equation we get -
meters
millimetres
Answer:
The physical and chemical properties of elements are periodic function of their atomic weights. This is Mendeleev's periodic law.
63 elements were classified by Mendeleev.
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Answer:
first.....lets calculate the molar mass of KClO4
39+35.5+16*4
39+35.5+64
=138.5g/mol
so that mean every mole have 138.5g...got that?
138.5g = 1mole
123g=x mole
123/138.5=x
x=0.888mol