Idont know what to do. barium sulfate, baso4, is made by the following reaction.
ba(no3)2(aq) + na2so4(aq)
baso4(s) + 2nano3(aq)
what is the theoretical yield of barium sulfate, expressed in grams, if 75.00 g of ba(no3)2 were used with an excess of na2so4?

Explanation:

We know we will need an equation with masses and molar masses, so let’s gather all the information in one place.  

M_r:         261.34                         233.39

              Ba(NO₃)₂ + Na₂SO₄ ⟶ BaSO₄ + 2NaNO₃

m/g:         75.00

1. Moles of Ba(NO₃)₂

2. Moles of BaSO₄

The molar ratio is (1 mol BaSO₄/1 mol Ba(NO₃)₂

3. Mass of BaSO₄

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