chemisry

posted by .

Why does luis place 3 cups of water without any solute in the freezer?

a. if some water spills, he will have extra
b. the plain water is the control group
c. he wants to know how long water takes to freeze
d. the 3 cups of water are unnecessary to the experiment

(b)

• chemisry -

How are we supposed to know what expriment you are doing? I have no idea why Luis placed three cups in the freezer, much less why they were empty. Perhaps he was having a bad day.

Similar Questions

1. science

Does water with salt boils faster than plain water Yes, salt increases the waters boiling point and therefore a higher temperature is needed for the water to boil. Salt does, indeed, increase the boiling point of water due to the salt …
2. Math

A=2 cups concentarte:3 cups water B=5 cups concentrate:9 cups water C=1 cup concentrate:2 cups water D=3 cups concentrate:5 cups water For each mix, how many batches are needed to make juice for 240 campers?
3. Science

Blow up a balloon & tie it up. Measure its diameter with a measuring tape. Place it in a freezer for at least an hour.Predict what happens to the balloon after some time in the freezer when its diameter is measured again. The answer …
4. Chemistry Lab

Which of the following would NOT be a factor for a solute to dissolve in water?
5. Chemistry Lab

Which of the following would NOT be a factor for a solute to dissolve in water?
6. algebra

Rebecca drinks at least 7 cups of water each day. So far,she drank 1.5 cups. She will drink the rest of her water from a bottle that holds 1.5 cups. Write an inequality for the minimum number of bottles of water she will drink.
7. biology

Q: Analyze an experiment in which one group of plants receive extra fertilizer and another group receives extra water. Is the experiment controlled or uncontrolled?
8. Math

Mix W = 5 Cups Concentrate and 8 Cups Cold Water, Mix X = 3 cups concentrate 6 cups cold water, Mix Y = 6 Cups Concentrate 9 Cups cold water, Mix Z = 3 Cups Concentrate 5 cups cold water Question: If possible, write each comparison …
9. science

if your doing an experiment about if sugar or salt will caused fermentation within the yeast.and you have Cup 1 with 2 cup of warm water ;2tsp of yeast and 2tsp of salt. Than cup 2 contains warm 2 cups of water:2tsp of salt and 2tsp …
10. biology

31. A student conducts an investigation in which she dissolves 1 gram (g) each of several substances in 50 milliliters (ml) of water. She has 12 identical plastic cups of water. She places 1 g of salt in three cups, 1 g of sugar in …

More Similar Questions