Based upon the ion charge of the following polyatomic ions, predict the formula for the following compounds. sulfate = so4 -2 phosphate = po4 -3 hydroxide = oh- sodium sulfate
naso4
na2so4
na(so4)2
naso8

The correct answer is .

Explanation:

Given polyatomic ions:

1) Sulfate =

2) Phosphate =

3) Hydroxide =

The formula of Sodium sulfate will be:

Sodium carries 1+ charge and and sulfate ion carries 2-charge. In order to neutralize negative charge on sulfate ion two sodium ions will be needed.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2