Question

100 ml of Na2CO3 solution containing 5.3 g of Na2CO3 was exactly neutralized by 200 ml of
H2SO4. solution. What is the pH of H2SO4,? (log 5 = 0.6990)​

Answer 1

The uncertainity of a moving bullet of mass 10g is 10^-5 m. Calculate the uncertainity in its velocity?

According to uncertainty principle

Δx.Δmv = ℎ / 4π

Δv = ℎ 4πmΔ

x=6.626 × 10−34 / 4×3

=> ×14×10−2×10−5

=> 5.27×10−28 m/s ...