Dr. martin is an ophiologist, or a scientist who studies snakes. during one experiment, dr. martin fed a snake a whole mouse and compared the mass of the snake before it consumed the mouse to the snake's mass immediately after it was fed. according to the law of conservation of mass, how should the masses compare?
a. the mass of the snake after feeding should be the same as the original mass of the snake.
b. the mass of the snake after feeding should be equal to the mass of the mouse. c. the mass of the snake after feeding should be equal to the original mass of the snake minus the mass of the mouse.
d. the mass of the snake after feeding should be equal to the original mass of the snake plus the mass of the mouse.

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide

Which statement best describes the function of enzymes?