Answer:
184.3g
Step-by-step explanation:
Given parameters: 
Volume of acid = 42.5L 
Unknown: 
Mass of acid = ? 
Solution: 
We have to assume that this measurement was taken at rtp; 
 At rtp; 
 1 mole of a substance occupies a volume of 22.4L 
 
 Therefore, 
 42.5L of H₂SO₄ will have 
 moles = 1.9moles
 moles = 1.9moles 
To find the mass;
 Mass = number of moles x molar mass 
 Molar mass of H₂SO₄ = 2(1) + 32 + 4(16) = 97g/mol 
 Mass = 1.9 x 97 = 184.3g