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 =
What is the number of significant figures in 9.984?
Express the Avogadro's number (6·023×1023) upto three significant figures.
What is the result of (5.472 - 1.12) to the appropriate number of signficant figures?
Express 0.0468 in scientific notation.
What does SI units stand for?
What is the relation between temperature in Kelvin (K) and temperature on centigrade scale?
The popular unit of pressure is atmosphere, how is it related to pascal?
What are SI units of the following:
(i) Density
(ii) Molarity
(iii) Energy
(iv) Temperature ?
Out of 5.00 g and 5.0 g which one is more accurate and why?
Mock Test Series
