Explain how two compounds can have the same percentage composition but different molecular masses?

1. If you increase the air temp. a crickets chirp will A) decrease B) increase C) stay the same 2. If you double the air temp. the chirp rate will A) double B) be halved C) remain the same D) all of the above 3.

Which postulate of Dalton's atomic theory is the result of the law of conservation of mass

How many valence electrons are in the Lewis structure of Methane (CH4) ? A. 2 B. 4 C. 6 D. 8 <- - I believe this is correct.

Which describes fat? A: a carbohydrate that produces energy B: a nucleic acid that directs cell function C: a lipid that stores energy D: a protein that speeds up a chemical reaction

Mantle material rises in convection currents because heated materials becomes more dense

If you made 6 moles of NO2 How many grams of N2 did you use N2+2O2> 2NO2

At what temperature in Kelvin will 0.0965 moles of chlorine exert a pressure of 2.02 atm at a volume of 0.652 L?

How can a mixture of nails and sawdust be most efficiently separated into its component parts? A:By cooling it B:By filtering it C: By using a magnet D:By using a catalyst

A 10.0 L balloon contains helium gas at a pressure of 655 mmHg. What is the new pressure, in mm Hg, of the helium gas if the volume is 20.0 L and if there is no change in temperature or quantity? 6550 mmHg 1000 mm Hg 1310 mmHg 300 mm Hg

Restate Newtons first law in terms of acceleration