Question

Which of the following data illustrates the law of conservation of mass?
a) 56 g of CO reacts with 32 g of oxygen to produce 44 g of CO2
b) 1.70 g of AgNO3 reacts with 100 mL of 0.1 NaCl to produce 1.435 g of AgCl and 0.63 g
of HNO3
c) 12 g of C is heated in vacuum and on cooling there is no change in mass.
d) None of the above.​

Answer 1

Answer:

4.9 of potassium chlorate when heated produced 1.92 g of oxygen and the residue (ACL) left behind weighed 2.98 g show that these result illustrate the law of conscruation of mass.

Answer 2

mass of reactant = mass of product

find moles of HCl

and then weight of HCl

mass is conserved

so 2 option is correct