Which is the least dense?

1000 g of water

1000 g of feathers

1000 g of concrete

1000 g of mercury

Match each term to its description. Match Term Definition Excess reactant A) Reactant that can produce more of the product Limiting reactant B) Reactant that can produce a lesser amount of the product Theoretical yield C) Amount of product predicted

Elements that's are gases, brittle & poor conductors at room temperature are A. Metalloids B. metals C. nonmetals D. isotopes

which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

Ideally, how should a buffer be prepared? A. in such a way that pH = POH B. in such a way that pH = pka c. in such a way that pH = Kg D. in such a way that pH = 1

Where are reactive metals found?

What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?

Calculate the molar mass for HCN. 0.2703 g/mol 2.703 g/mol 27.03 g/mol 270.3 g/mol

This iron oxide mineral commonly has a reddish color and consistently has red streaks. What mineral is it?

Which of the following transitions would release energy? n=2->n=3 n=1 - > n=3 n=3 - >n=1 n=3->n=2

Which animal group actually saw a drop in the number of endangered and threatened species between 1995 and 2005? a Fish b. Reptiles c. Birds d. Mammals