Answer:
747mL of the 0.157mL are needed
Explanation:
To find the grams of salt we need to convert these grams to moles using molar mass of magnesium nitrate (148.3g/mol). Then, with the molar concentration we can convert the moles to liters and, as last, to milliliters, as follows:
Moles Mg(NO₃)₂:
17.4g * (1mol / 148.3g) = 0.117 moles of magnesium nitrate
Volume:
0.117 moles * (1L / 0.157moles) = 0.747L
= 747mL of the 0.157mL are needed
In a 0.157M solution there are 0.157 moles per liter of solution
