Question

question 15 when balancing the equation h3po4 + koh → k3po4 + h2o the coefficient for water is blank 1. blank 1 add your answer 5 points question 16 using the equation al(oh)3 + 3hbr → albr3 + 3h2o, blank 1moles of water would be produced from 2.49 moles of al(oh)3. blank 1 add your answer 5 points

Explanation:

Question 15

Step1: Balance the chemical equation

$H_3PO_4 + 3KOH
ightarrow K_3PO_4+3H_2O$
The coefficient of water is 3.

Step1: Use mole - ratio from balanced equation

The balanced equation is $Al(OH)_3 + 3HBr
ightarrow AlBr_3+3H_2O$. The mole - ratio of $Al(OH)_3$ to $H_2O$ is 1:3.

Step2: Calculate moles of water

If we have 2.49 moles of $Al(OH)_3$, then the moles of $H_2O$ produced is $n = 2.49\times3$.
$n=7.47$ moles.

Answer:

3

Question 16