Balance the following chemical

equation by providing the correct

coefficients.

[?]Pb (NO3) 2 + [?] Na2Cr04

[?]PbCrO4 + [?]NaNO3

Draw all possible lewis structures (including resonance structures for methyl azide (ch3n3 using lewis structure rules.

The brackets used to express concentration [ ], when making equilibrium constant calculations, indicate

A 48.6 g ball of copper has a net charge of 2.4 µc. what fraction of the copper's electrons have been removed? (each copper atom has 29 protons, and copper has an atomic mass of 63.5.)

According to the nebular hypothesis, our solar system formed from a huge rotating cloud made mostly of a. carbon and hydrogen. b. helium and hydrogen. c. oxygen and helium. d. nitrogen and oxygen.

Which two compounds have the same empirical formula? A. NO2 and N2O4 B. H O and H2O C. CH2 and C3H8 D. C2H2 and C2H4

At 300 k the pressure inside a gas filled container is 500 kPa if the pressure inside decreses to 100kpa but the volume remains the same what is the final temperature of the gas

The SI unit for current is: joules volts ohms amps

In chemical reactions, there is a conservation of what?

If the temperature of water increases as you heat it, the temperature is the independent variable. True False

Which is made by weathering? A. sediments B. minerals C. ash D. magma