Which of the following samples has a mass greater than 50.00 grams? Select one:
a. 6.02 x 10 23 atoms of Fe
b. 3.01 x 10 23 molecules of CH 4
c. 9.03 x 10 23 molecules of H 2O
d. more than one correct response
e. no correct response

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by