When 6.7 g of salt are dissolved in 52.1 mL of water, 6888.5 J of heat are given off by the system. How much heat would be given off if only 1.00 g of salt had been dissolved in the water?

the heat absorbed on dissolving 1 g of salt = 1028.13 J

Explanation:

given data

salt dissolve = 6.7 g

water dissolve = 52.1 mL

heat = 6888.5 J

solution

when you dissolve 6.7 g of salt then heat absorbed  = 6888.5 J

and

if dissolve 1 g of salt then heat absorbed = (6888.5 J ÷ 6.7 g) × 1 g

if dissolve 1 g of salt then heat absorbed = 1028.13 J

so that

the heat absorbed on dissolving 1 g of salt = 1028.13 J

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer