TIME REMAI 28:46
beharko
Denise is riding her bike and falls to the ground. During
the collision, she hits both grass and cement.
Which best explains why Denise had fewer injuries to
the area of her body that hit the grass?
O The grass did not exert a reaction force.
O The grass did not exert an action force.
O The grass shortens the time of the collision
O The grass extends the time of the collision
to search
o
Bi

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.)

What layer of the atmosphere is directly above the troposphere?

When balancing a chemical equation: