The answer is D
Explanation:
Just got it right. Trust me its not A.
The answer is D
Explanation:
Just got it right. Trust me its not A.
D) The addition of different substances affects the freezing point of water.
Explanation:
The best answer would be letter D.
The short explanation would be, the other choices only involves the addition of 1 substance (salt or sugar).
The long explanation:
Susie is testing two types of solution: sugar + water and salt + water. This means that she is testing the effect of both. An experiment is done to test certain variables and an addition of a variable that is not being tested is not advisable. But since she intentionally used both solutions, then it is reason enough to assume that she is testing both substances (sugar and salt) so the hypothesis should include both as well.
The freezing point of water will be lowered 3°C
Explanation:
Remember that molality is generally the standard for calculating the concentration, between molarity and molality. In this question we have to apply molality, given the units as moles and kilograms.
We can start by receiving the molality of this solution through the following formula...
Now we can determine how much the freezing point of water will be lowered, given that the freezing-point depression constant for water is Kf= –1.86°C/m. Remember that " Kf " is the final temperature, so to determine how much the temperature of the water will decrease, we can note the change in temperature...
Hence the freezing point of water will be lowered 3°C.
It will provide an instant answer!