Answer: To represent conservation of mass.
Explanation:
As the law given by Antoine Lavoisier which states that " in a chemical reaction, mass before and after the reaction remains the same that is mass remains conserved in a chemical reaction" which is known as Law of Conservation of Mass.
Total mass of the reactants = Total mass of the products
So, in order to represent the conservation of mass chemical equation should always be balanced.
1) first, we have to convert the grams to moles of AuCl3 using the molar mass of the molecule.
molar mass of AuCl3= 197 + (35.5 x 3)= 303.5 g/mol
73.4 g (1 mol AuCl3/ 303.5 g)= 0.242 moles
2) now. let's convert moles of AuCl3 to moles of chlorine gas (Cl2) using the mole-mole ratio
0.242 mol AuCl3 (3 mol Cl2/ 2 mol AuCl3)= 0.363 mol Cl2
3) finally, we convert moles to grams using the molar mass of Cl2.
molar mass of Cl2 = 35.5 x 2= 71.0 g/mol
0.363 mol Cl2 ( 71.0 g/ 1 mol)= <span>25.8 grams</span>
10 gm salt in 100 ml water- let its concentration be x
We want 2x(A. T. Q)
For decreasing concentration, we need higher solvent(water here)
x= 100ml
2x=2(100)ml
We already had 100 ml
So 200-100=100
100ml is correct
Answer:
according to me option a is the correct one