Question

The number of atoms in 4.25 g of NH3 is approximately

Solution

Correct option is

 

4.25 g NH3 = 4.25/17 mol

 

SIMILAR QUESTIONS

Q1

If 0.5 mol of BaCl2 is mixed with 0.2 mol of Na3PO4, the maximum number of moles of Ba3(PO4)2 that can be formed is

Q2

If 1021 molecules are removed from 200 mg of CO2, then the number of moles of CO2 left are

Q3

The  number of gram molecules of oxygen in  molecules is

Q4

The molecular weight of O2 and SO2 are 32 and 64 respectively. If onelitre of O2 at 15oC and 750 mm contains N molecules, the number of molecules in two litres of SO2 under the same conditions of temperature and pressure will be

Q5

Five grams of each of the following gases at 87oC and 750 mm pressure are taken. Which of them will have the least volume?

Q6

Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at wt. of Fe = 56) present in one molecule of haemoglobin is 

Q7

In the reaction, 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + H2O (l), when 1 mole of ammonia and 1 mole of O2 are made to react to completion 

Q8

50mL 10 N H2SO4, 25mL 12 N HCl and 40 mL 5 N HNO3 were mixed together and the volume of the mixture was made 1000mL by adding water. The normality of the resultant solution will be : 

Q9

A 100mL solution of 0.1 N HCl was titrated with 0.2 N NaOH solution. The titration was discontinued after adding 30mL of NaOH solution. The remaining titration was completed by adding 0.25 N KOH solution. The volume of KOH required for completing the titration is 

Q10

One mole of calcium phosphide on reaction with excess of water gives