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`.