Respuesta :

Answer:

80 units B

Explanation:

Equation for the reaction is given below:

A + 2B —> C

From the equation above,

2 units of B reacted to produce 1 unit to C.

Finally, we shall determine the unit of B needed to produce 40 units of C. This can be obtained as follow:

From the equation above,

2 units of B reacted to produce 1 unit to C.

Therefore, x unit of B will react to produce 40 units of C i.e

x unit of B = 2 × 40

x unit of B = 80 units

Thus, 80 units B is needed for the reaction.