Concentration is measured through multiple equations including mole fraction, % mass, ppm (parts per million), ppb (parts per billion), molarity, and molality.
Based on the information you provided, your answer is either by mole fraction or molarity.
mole fraction:
moles a/ total moles (never greater than 1 and has no unit)
10.0g NaCl • 1 mol
——— = 0.1711156742 mol
58.44 g (molar mass of NaCl)
0.75 L solution • 1 mol
——— = 0.0334821429 mol
22.4 L (stp constant)
.1711156742 mol NaCl + 0.0334821429 mol solution = 0.2045978171 total mol
.1711156742 mol NaCl / 0.2045978171 total mol = 0.8363514168 or 0.84
0.84
molarity:
mol solute/L solution (unit- M)
10.0g NaCl • 1 mol
——— = 0.1711156742 mol
58.44 g (molar mass of NaCl)
0.1711156742 mol NaCl / 0.75 L solution = 0.2281542323 M or 0.23 M
0.23 M
hope this helps :)