Home
Class 11
PHYSICS
An alloy of Zn and Cu (l.e. brass) weigh...

An alloy of Zn and Cu (l.e. brass) weighs 16.8 g in air and 14.7 g in water. If relative density of Cu and Zn are 8.9 and 7.1 respectively then determine the amount of Zn and Cu in the alloy.

A

6.6 gm

B

7.6 gm

C

8.6 gm

D

5.6 gm

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

A piece of brass (Cu and Zn) weighs 12.9g in air. When completely immersed in water, it weighs 11.3g . Then relative densities of Cu and Zn are 8.9 and 7.1 respectively. The mass of copper in the alloy is

A metallic sphere weighs 35 g in air and 28.5 g water. Find its relative density and also find weight in a liquid of relative density 0.9.

A piece of solid weighs 120 g in air ,80 g in water and 60 kg in a liquid . The relative density of the solid and that of the liquid are respectively

A solid weighs 32 gf in air and 28.8 gf in water. Find the weight of solid in a liquid of density 0.9 "g cm"^(-3)

Brass is an ally of Cu and Zn. A sample of brass weighing 5.793 g when treated with excess of dil H_2SO_4 gives 324 " mL of " dry H_2 at 20^@C and 750 mm pressure. What is the percentage of Cu by weight in the alloy.

An ornament weighting 36g in air, weighs only 34g in water. Assuming that some copper is mixed with gold to prepare the ornament, find the amount of copper in it. Specific gravity of gold is 19.3 and that of copper is 8.9.

50.0 g sample of brass is dissolved in 1 L dil H_2SO_4.20mL of this solution is mixed with KI, and the liberated I_2 required 20 " mL of " 0.5 M hypo solution for titration calculate the amount of Cu in the alloy.

A solid body weighs 2.10 N in air. Its relative density is 8.4. How much will the body weigh if placed (i) in water (ii) in a liquid of relative density 1.2 ?

A body weighs 82.1 gf in air, 75.5 gf in water and 73.8 gf in a liquid. A. Find the relative density of the liquid. B. How much will it weigh if immersed in a liquid of relative density 0.87 ?

An irregular piece of metal weighs 10.00g in air and 8.00g when submerged in water (a) Find the volume of the metal and its density. (b) If the same piece of metal weighs 8.50g when immersed in a particular oil. What is the density of the oil?