Question

Eduardo dissolved as much salt as he could into a beaker of water. He did not measure the salt as he put it in, but he wanted to know how much salt had dissolved into the water. He weighed the saltwater and the beaker. The total mass of both was 156 g. Eduardo gently heated the beaker of saltwater until all the water evaporated, then weighed it again.

The salt and beaker together massed 56 g. When he removed all the salt from the beaker, the beaker weighed 20 g.

How much salt did Eduardo dissolve into the water?

Answer 1

Find the mass of the saltwater before evaporation:

Total mass of saltwater and beaker = 156 g.

Find the mass of the beaker:

Mass of the beaker = 20 g.

Calculate the mass of the saltwater:

Mass of saltwater= Total mass − Mass of beaker = 156g − 20g = 136g.

Find the mass of the salt after evaporation:

Mass of salt and beaker after evaporation = 56 g.

Calculate the mass of the salt:


Mass of salt = Mass of salt and beaker − Mass of beaker = 56g − 20g = 36g.


This means that the correct answer is 36g.

Answer 2

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Answer 12

36g

Answer 13

is da answer