What is the empirical formula of a compound that contains 50.0% carbon, 6.7% hydrogen, and 43.3% oxygen by mass?

a.

ch3o

b.

c3h5o2

c.

c2h2o5

d.

c3h205

e.

c1h3o5

Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

What is an example of a physical property?

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer