Using distributive property solve 9*19

How is the atomic mass of an element calculated

A weather balloon is filled with helium that occupies a volume of 5.27 10^4 L at 0.995 atm and 32.0°C. After it is released, it rises to a location where the pressure is 0.720 atm and the temperature is - 12.7°C.

In a constant-pressure calorimeter, 50.0 mL of 0.320 M Ba (OH) 2 was added to 50.0 mL of 0.640 M HCl. The reaction caused the temperature of the solution to rise from 23.76 °C to 28.12 °C.

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

What must models and theories do in order to remain valid? Provide 2 facts.

Identify the missing numbers below to show the result of dividing the numbers 5.6 x 10^12 / 3.5 x 10^9 = A x 10^B

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