Answer: The correct answer is Option C.
Explanation:
To calculate the number of moles, we use the formula:
We are given in the question that the masses of twp samples are different and from the above formula, we see that the moles of a substance depends on the molar masses of the substance.
Volume of the substance has no effect on the moles.
So, the two substances can have 1 mol of substance.
Answer:
A) ,
,
A = 1.5×, A = 1.9×
, A=1.5×
B) 4.469
Explanation:
From Arrhenius equation
where; K = Rate of constant
A = Pre exponetial factor
= Activation Energy
R = Universal constant
T = Temperature in Kelvin
Given parameters:
taking logarithm on both sides of the equation we have;
since we have the rate of two different temperature the equation can be derived as:
= 19846.04×7.544×
= 1.497
=
= 4.469
Explanation:
a. → ?
Removing common ions from both sides, we get the net ionic equation:
b. →
No precipitation is occuring.
c. →
Removing common ions from both sides, we get the net ionic equation:
d. →
Removing common ions from both sides, we get the net ionic equation:
Answer:
32,127.02 grams of hydrogen hexafluorosilicate will contain this 25,434 grams of F.
Explanation:
Volume of cylindrical reservoir = V
Radius of the cylindrical reservoir = r = d/2
d = diameter of the cylindrical reservoir = d =
r = d/2 = 22.5 m
Depth of the reservoir = h = 10.0 m
Volume of water cylindrical reservoir : V
Density of water,d = 1 kg/L
Mass of water cylindrical reservoir = m
1.6 kilogram of fluorine per million kilograms of water. (Given)
Concentration of fluorine in water = 1.6 kg/ 1000,000 kg of water
In 1000,000 kg of water = 1.6 kg of fluorine
Then of water have x mass of fluorine:
15,896,250 kg water of contains mass 25.434 kg of fluorine.
25.434 kg = 25434 g
25,434 grams of fluorine should be added to give 1.6 ppm.
Percentage of fluorine in hydrogen hexafluorosilicate :
Molar mass hydrogen hexafluorosilicate = 144 g/mol
Total mass of hydrogen hexafluorosilicate = m'
m' = 32,127.02 g
32,127.02 grams of hydrogen hexafluorosilicate will contain this 25,434 grams of F.