Oxygen is a gas with no color or smell

a. True

b. False

How many moles of H2O are there in1.0g of H20?

Describe Thomson's "plum pudding" model of the atom, and then explain how the results of Rutherford's gold foil experiment resulted in a change to the atomic model.

What the symbol for the oxygen isotope with 10 neutrons?

0.0000250 m in scientific notation

Which element is likely to have the highest thermal conductivity? antimony carbon sodium gallium

Dinitrogen difluoride gas is collected at in an evacuated flask with a measured volume of. When all the gas has been collected, the pressure in the flask is measured to be.

How is the mass number of an isotope expressed in the name of an atom?

1. A sample of sodium chloride (NaCl) has a mass of 28.36g. Calculate the number of moles of NaCl in the sample. Show your work. 2. Calculate the number of moles of each element (number of moles of Na and number of moles of Cl) in NaCl in the sample.

How can we predict how the moon will change appearance from day to day?

When is the Sun directly overhead in the continental United States? A. always B. in the summer C. never D. at noon