Using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk.

What are the functions of protein in organisms?

The weight of an object never changes. True False

Why does the atmosphere allow life on planet Earth

what mass of sucrose needs to be dissolved into 540 g of water in order to prepare a 15.0% by mass solution?

Index fossils are found throughout the world and come from organisms which existed during limited periods of geologic time. Which of the following best describes what index fossils can be used to determine? A. the age of a layer of rock B.

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.

Which of the following shows the correct net ionic equation for the reaction between HCl and NH3?

How would non secretion of of saliva effect digestion of food in the mouth.

Which of the following is insoluble in water? a." (NH) SO b. Na so c. Maso d. ZnSO e Baso