Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AC = 8

and BC = 4, what is the length of DC? (Note: the figure is not drawn to scale.)

A

D

X

Pb (OH) 2 + _HCI → __ H2O + _ PbCl2

How many seconds are there in the month of February, which has twenty-eight days in a common year? 3.24 x 10-6 s 2.42 x 106 s 6.72 x 102 s 4.2 x 103 s

A buffer is made with sodium acetate (CH3COONa) and acetic acid (CH3COOH); the Ka for acetic acid is 1.80*10-5. The pH of the buffer is 3.98.

What would be the subscripts for the formula unit Ca_O_?

Which best explains the difference between a monomer and a polymer? A monomer is larger than a polymer. A monomer contains carbon and a polymer does not. A polymer contains carbon and a monomer does not. A polymer is larger than a monomer.

What is a comet? tell in a short and easy answer

In calcium fluoride, what is the closets noble gas that each ion becomes?

Americium-241 is used in some smoke detectors. it is an alpha emitter with a half-life of 432 years. how long will it take in years for 45.0 % of an am-241 sample to decay?

What is the purpose of forming a scientific hypothesis? It starts a plan to test your idea It provides the answer to your investigation It allows you to prove your idea is correct

N2 + 3h2 2nh3 how many moles of hydrogen are needed to completely react with two moles of nitrogen?