Question

A compound has the following percentage composition zn:22.65percent,s:11.15percent,o:61.32percent,H::4.88percent Its relative molecular mass is287g,calcute its molecular formula assuming that all the hydrogen in compound is present in combination with oxygen as water of crystallization. Zn-65,S:32,O-16,H-1​

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 ...