Which of these is a pure substance?

a. ocean water

b. 10 carat gold

c. solid gold

d. cake mix

What does Hund's rule state? A. An orbital can contain two electrons only if the electrons have opposite spins. B. An orbital can contain two electrons only if all other orbitals at that sublevel are empty. C.

3. Why do atoms form covalent molecules!

What type of protein penetrates to the interior of the plasma membrane but does not extend all the way through it?

The ph of a sodium acetate-acetic acid buffer is 4.70. calculate the ratio [ch3coo-] / [ch3cooh]

Predict Which of the following transition metal ions has a color: Cr3 + Cd2 + Hg+2 V2+. Explain

my attic keeps making sound and thombs wat does it mean iam creeped out right now it just happened and the lightbulb was shaking

During what phase of the moon can a lunar eclipse occur? A) new moon B) first quarter C) waxing gibbous D) full moon

All bodies of water make up a earth's A. atmosphere B. asthenosphere C. hydrosphere D. lithosphere

Which characteristic provides clues to how igneous rocks were formes? A textures B color C luster D streaks

If your heart beats an average of 68 times per minute, how many times will your heart beat in an hour? In a day? In a week? Show all work