Does the law of conservation of mass apply to physical changes or just chemical changes?

The heat of fusion of water is 80 cal/ g. How much energy is needed to melt 0.05 kg of ice?

Is water denser than vinegar

Which of these following is true about the mass of the reactants in a chemical reaction?

How many moles are in 0.06 grams of iron

A 155g sample of copper was heated to 150.0 degrees Celsius, then placed into 250.0g water at 19.8 degrees Celsius. Calculate the final temperature of the mixture

How many minutes will be required to deposit 1.00 g of chromium metal from an aqueous?

Does a gas discharge tube filled with boron emit the same wavelength

What is HNO3 it's formula

Which indicator would be the best to use for a titration between 0.10 m hcooh with 0.10 m naoh? you will probably need to consult the appropriate table in the book. 1. methyl red, color change at ph 3-5 2.

How are elements group into families