The visible universe is estimated to contain 10²² stars. How many moles of stars are present in the visible universe?

Raunak took 5 moles of carbon atoms in a container and Krish also took 5 moles of sodium atoms in another container of the same weight. (a) Whose container is heavier? (b) Whose container has more number of atoms?

Fill in the missing data in the Table 3.1

What is the SI prefix for each of the following multiples and submultiples of a unit?

(a) 10³

(b) 10^–1

(c) 10^–2

(d) 10^–6

(e) 10^–9

(f) 10^–12

Express each of the following in kilograms

(a) 5.84×10^-3 mg

(b) 58.34 g

(c) 0.584g

(d) 5.873×10^-21g