Chemistry
(a) Calculate the number of moles in 7 g of nitrogen.
(b) What is the volume at S.T.P. of 7.1 g of chlorine?
(c) What is the mass of 56 cm3 of carbon monoxide at S.T.P?
Related Questions
From the equation for burning of hydrogen and oxygen
2H2 + O2 ⟶ 2H2O (Steam)
Write down the number of mole (or moles) of steam obtained from 0.5 moles of oxygen.
From the equation
3Cu + 8HNO3 ⟶ 3Cu(NO3)2 + 4H2O + 2NO
(At. mass Cu=64, H=1, N=14, O=16)
Calculate:
(a) Mass of copper needed to react with 63 g of HNO3
(b) Volume of nitric oxide at S.T.P. that can be collected.
Some of the fertilizers are sodium nitrate NaNO3, ammonium sulphate (NH4)2SO4 and urea CO(NH2)2. Which of these contains the highest percentage of nitrogen?
200 cm3 of CO2 is collected at STP when a mixture of acetylene and oxygen is ignited. Calculate the volume of acetylene and oxygen at STP in the original mixture.
2C2H2 (g) + 5O2 (g) ⟶ 4CO2 (g)+ 2H2O (g)