How many grams of lactic acid (C3, H6, O3) are in a .5 M solution of lactic acid? (12 C, 1H, 16O).?

Question

how many grams of salt (NaCl) must be dissolved in water to make 2 liters of a 2 M salt solution? (23 Na, 14 Cl)

Answer 1

0.5 molar has 0.5 moles per liter

0.5 moles of lactic acid @ 90.08 g/mol =

your answer: 45.04 g of lactic acid are in each litre of solution

=====================================

how many grams of salt (NaCl) must be dissolved in water to make 2 liters of a 2 M salt solution? (23 Na, 14 Cl)

2 litres @ 2 mol / litre = 4 moles of NaCl

4 moles of NaCl @ 58.44g / mol =

your answer: 234 grams of NaCl are in 2 litres of 2 molar NaCl