How many g of Na2Co3 shold be dissolved to make 100cm3 of 0.15 molar Na2Co3 solution?With steps

How many g of Na2Co3 shold be dissolved to make 100cm3 of 0.15 molar N

1.	How many g of Na2Co3 shold be dissolved to make 100cm3 of 0.15 molar Na2Co3 solution?With steps
Answer» 1000 cm3 of 0.15 M Na2CO3 contains Na2CO3 = 0.15 mol100 cm3 of 0.15 M Na2CO3 Will contain Na2CO3 =\xa0{tex}\\frac { 0.15 } { 1000 } \\times 100 = 0.015 \\mathrm { mol }{/tex}Molar mass of Na2CO3 = 2\xa0{tex}\\times{/tex} Na +1\xa0{tex}\\times{/tex} C +3 {tex}\\times{/tex}O =2 {tex}\\times{/tex}23 +1\xa0{tex}\\times{/tex} 12 + 3\xa0{tex}\\times{/tex} 16= 46 + 12 + 48 =106 g mol-1\xa0Therefore, Mass of Na2CO3 =Number of mole of\xa0Na2CO3\xa0{tex}\\times{/tex} Molar mass of Na2CO3 =\xa00.015 mole\xa0{tex}\\times{/tex}106 g/mol = 1.59 g.