Home
Class 12
CHEMISTRY
A 0.50g sample of rock was found to have...

A 0.50g sample of rock was found to have `2.5 xx 10^(-6)` mol of `._(19)^(40)K (t_(1//2)=1.3 xx 10^(9) "yr")` and `7.5 xx 10^(-6)` mol of `._(20)^(40)Ca` . How old is the rock?

A

`6.5 xx 10^(8)` yr

B

`1.3 xx 10^(9)` yr

C

`2.6 xx 10^(9)` yr

D

`5.2 xx 10^(9)` yr

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETIC & NUCLEAR CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.3 To Q.32)|1 Videos

  • CHEMICAL KINETIC & NUCLEAR CHEMISTRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.33 To Q.62)|2 Videos

  • SURFACE CHEMISTRY

    NARENDRA AWASTHI|Exercise Level -2|1 Videos