0.761 mol of would you have if you have 76.36 grams.
A mole is defined as 6.02214076 × of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Given data:
Mass=76.36 grams
Moles = 0.761
Hence, 0.761 mol of would you have if you have 76.36 grams.
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Answer:
The order of the production of bacteria is 1.
12,787 bacteria will be present after 112 min.
is the rate constant for the process.
Explanation:
Rate of formation of bacteria when there 100 bacteria: R
Rate of formation of bacteria when there 200 bacteria: R' =2R
Rate of formation of bacteria is directly proportional to the number of bacteria:
x = 1
The order of the production of bacteria is 1.
The half life of the process =
Rate constant of the process = k
For first order process k is only dependent on half life:
For the first order process the increment numbers is given ;
Where:
= Initial population
N = Population after time t.
We have ;
t = 112 minutes
12,787 bacteria will be present after 112 min.
is the rate constant for the process.
Answer : The correct option is, (b) 22.5 M
Explanation : Given,
Mass of calcium nitrate tetrahydrate = 266 g
Molar mass of calcium nitrate tetrahydrate = 236.15 g/mole
Volume of solution =
Molarity : It is defined as the moles of solute present in one liter of solution.
Formula used :
Now put all the given values in this formula, we get:
As calcium nitrate tetrahydrate dissociate to give 1 mole of calcium ion, 2 moles of nitrate ion and 4 moles of water.
The concentration of nitrate ion =
Thus, the concentration of nitrate ion is, 22.5 M