What volume of 9M HCl and 4 MHCl should be mixed to get 1L of 5M HCl solution?
The density of 3M solution of NaCl is 1.25g ml-1. Calculate molality of the solution.
How many moles of NaOH are contained in 27mL of 0.15 M NaOH?
1000mL of NaOH contains 0.15 moles
27 mL of NaOH contains
= 0.004 moles
Calculate the mass of nitrogen supplied to the soil by 5Kg of urea [CO(NH2)2]?
The formula for urea is.
The molar mass for urea is 14x 2+1x 4+12+16= 60 g/mole.
In this 60 g of urea, nitrogen has a mass of 28 g.
So by simple proportion in 5 kg of urea,
nitrogen has a mass =
In a reaction vessel 0.184 g of NaOH is required to be added for completing the reaction. How many millilitre of 0.150 M NaOH solution should be added for this requirement?
Molar mass of NaOH = 40 g mol-1
1000 mL of NaOH solution contains 0.150 mol = 0.150 x 40 = 6 g
It means that 6g sodium hydroxide is present in 1000 mL
0.184 g sodium hydroxide would be present in