Question

Consider a hypothetical reaction in which a and b are reactants and c and d are products. if 25 grams of a completely reacts with 26 grams of b to produce 14 grams of c, how many grams of d will be produced?

Answer 1

According to law of conservation of mass, the mass can neither be destroyed nor created in a chemical reaction.  The mass of reactants and mass of products are equal in a chemical reaction.

The reaction between A and B (reactants) to form C and D (products) is given as:

$A+B\rightarrow C+D$

The mass of A = $25 g$ (given)

The mass of B = $26 g$ (given)

The mass of reactant = mass of A + mass of B

Substituting the values:

The mass of reactant = $25 g + 26 g = 51 g$

The mass of C = $14 g$

Let the mass of D = $X g$

So, the mass of product = mass of C  + mass of D

Substituting the values:

the mass of product = $(14 +X) g$

According to law of conservation of mass:

the mass of reactant = the mass of product

Substituting the values,

$51 g = (14 +X) g$

$X = 51 -14 g$

$X = 37 g$

Hence, the amount of D produced in the reaction is $37 g$.