If 150g of sugar is dissolved in 100cm3 of water, what will be the mass of the solution?
2007-10-18 04:58:58 · 6 answers · asked by acemum 2 in Education & Reference ➔ Homework Help
also, how do you work it out? please and thankyou to everyone who helps!
2007-10-18 05:09:21 · update #1
1 cm3 of water has mass of 1g (slightly less if warm water because less dense, but presume question is baswed on that) so 100 cm3 has mass of 100g. When sugar dissolves it is still there even if you cannot see it, so you add the mass of the water and the mass of the dissolved sugar.
You could check it out with kitchen scales if you are not convinced.
2007-10-18 05:36:37 · answer #1 · answered by derbydolphin 7 · 0⤊ 0⤋
1 cm^3 of water has a mass of 1 g so 100 cm^3 has a mass of 100g. Add this to the mass of sugar and the answer is 250g.
2007-10-18 11:35:37 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Answers given work: 250g.
Why this works:
The general principle so you can actually tell your daughter how to do all of these problems
Kilograms are based on the principle that 1kg of water has a volume of 1 litre.
I litre is exactly equivalent to 1000cm cubed (it means the same).
Therefore in the example 100cm cubed is 10% of a litre, so weighs 1/10 of a kg, 100g.
Of course actual measured weights of a litre will vary slightly in real life... but that's a whole science experiment
2007-10-18 06:09:47 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Don't know the answer, but you could try some of the sites listed below that help with homework.
I always found the BBC site good for homework.
2007-10-18 05:15:44 · answer #4 · answered by dietbru 3 · 0⤊ 0⤋
250g - 1cm3 water is about 1 gram.
2007-10-18 07:34:48 · answer #5 · answered by Anonymous · 0⤊ 0⤋
250gm
2007-10-18 05:07:28 · answer #6 · answered by brainstorm 7 · 0⤊ 0⤋