Please help me 14 point's If 1kg of the compound toluene melts at -950C, then 500g of toluene will
Group of answer choices

A) Boil at 95 0C

B) Freeze at -47.5 0C

C) Boil at 47.5 0C

D) Freeze at -95 0C

Different isotopes indicate that an element will have different numbers of

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt