Josh prepares a solution by mixing sodium nitrate with water. To calculate the molarity of the solution, josh should calculate the moles of which substance,and why?
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Answer:
the answer is sodium nitrate because it is solute
Explanation
thats what is correct I assure you.
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To calculate this, we need the molar mass of water which is obtaine by adding the molar masses of the elements. For H2O, the molar mass is 18.02g/mol. Then, from the amount given which is 1 gram of H2O we divide the molar mass which yields to 0.06 mol of water.
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Answer:
a) 13.2 moles
b) 79.33 grams of
Explanation:
First, we'll need to balance the equation
→
There are 2 (O) on the left and only one on the right, so we'll add a 2 coefficient to the right.
→
Now there are 4 (H) on the right and only 2 on the left, so we'll add a 2 coefficient to the () on the left.
→
The equation is now balanced.
a) This can be solved with a simple mole ratio.
4.6 moles ×
= 13.2 moles
b) This problem is solved the same way!
2.2 moles ×
= 2.2 moles
However, this problem wants the mass of , not the moles.
The molecular weight of is the weight of 4 (H) molecules and 2 (O) molecules (found on the periodic table). So,
4(1.008) + 2(15.999) = 36.03 g/mol
2.2 moles ×
= 79.33 grams of
Answers
2HBr(aq) Ba(OH)2 (aq) = 2H2O (l) BaBr2(aq)
Ionic equation
2H 2Br- Ba 2 2OH- --------> Ba 2 2Br - 2H2O
Net ionic equation
2H (aq) 2OH- (aq)- ---------> 2H2O (l)