Question

If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass?

4.48% MgO

18.3% MgO

22.3% MgO

28.8% MgO

Answer 1

@Abhisar

Answer 2

u don't want to try it ?

Answer 3

use the same formula i applied in the last question.

Answer 4

ohhh ok so 45.8 / 205 * 100 right?

Answer 5

u have to divide the mass of solute by mass of SOLUTION. 205 is mass of solvent. Mass of solution = mass of solute + Mass of solvent.

Answer 6

In previous question they had directly given the mass of solution \(\color{green}{\huge ツ}\)

Answer 7

got it ?

Answer 8

i understand what you're saying but i dont get how to solve it

Answer 9

It will be \(\huge\frac{45.8}{45.8+205}*100\)

Answer 10

got it ?

Answer 11

and it will be equal to 18.261 \(\approx\) 18.3%

Answer 12

ahh i see, so 45.8 is tha solute?

Answer 13

yes and 205 is solvent, 205+45.8 is solution

Answer 14

ah ok i see now, thanks so much. i've got just a few more if up for some more medals haha

Answer 15

In general, the substance which is dissolved in something is called as solute, the substance in which something is dissolved is called as solvent. Solute and solvent together is called as solution

Answer 16

Go ahead u can as much as u want :)

Answer 17

alright cool now i got tha terminology down haha, and ok ill just post em here.

Answer 18

Describe, in your own words, why sugar will dissolve faster in hot tea than it will in cold tea. Be specific in your explanation.

Answer 19

post it as new question !
Multiple questions in a single thread is against the code of conduct :(

Answer 20

okay