Question

write a law of conservation of mass​

Answer 1

Answer:

Law of conservation of mass can be expressed in the differential form using the continuity equation in fluid mechanics and continuum mechanics as:

∂ρ/∂t+▽(ρv)=0

Where,  

• ρ is the density
• t is the time
• v is the velocity
• ▽ is the divergence

Explanation:

Answer 2

1. take hundred ml of lead nitrate solution in a conical flask (250 ml) by dissolving 2 grams of lead nitrate in hundred ml of water
2. make potassium iodide solution by dissolving 2 grams of potassium iodide in hundred ml of water
3. put the potassium iodide solution in a small test tube and hang it in the conical flask ( by using thread) containing hundred ml of lead nitrate solution
4. Put a cork on the conical flask
5. now measure the weight of the apparatus (the set )
6. remember that the lead nitrate solution do not mix with the potassium iodide solution
7. shake the flask gently and let the both solutions mix and the chemical reaction takes place
8. now measure the weight of the apparatus again
9. we found that the weight of the apparatus is same before and after the chemical reaction
10. this all concludes that mass neither be created nor be destroyed in a chemical reaction and the mass is conserved here
11. This is conservation of mass