How many copper atoms are in a pure copper statue with a mass of 135

kg?

for 2Na (s) + Cl2 (g) - >2NaCl (s) how many grams of sodium chloride will be made from 115 g of sodium metal when when reacted with excess chlorine gas

A red light wave travels at 3 x 108 m/s. if it has a wavelength of 5.5 x 10-7 m, what is its frequency?

Which of the following absorbs most of the harmful UV radiation from the sun? Ozone Oxygen Carbon dioxide Sulfur dioxide

The surface tension of which of the following liquid is maximum? a) H20 b) C6H6 c) CH3OH d) C2H5OH ... ?

What element do you think is the most abundant in the star that you observed in part two? explain your answer?

Identify water. weak electrolyte, weak acid nonelectrolyte strong electrolyte, strong acid weak electrolyte, strong acid strong electrolyte, weak acid

What is the atomic weight of a hypothetical element consisting of two isotopes, one with a mass of 62.2 u which is 24% abundant, and the other with a mass of 64.0 u?

A pure compound contains 24 g C, 4 g H, and 32 g O. If no other elements are present, determine the empirical formula of the compound. Be sure to show your work.

One method for preparing pure iron from Fe2O3 is by reaction with carbon monoxide. Fe2O3 (s) + CO (g) →Fe (s) + CO2 (g) How many moles of carbon monoxide are needed to react completely with 122 kg of Fe2O3.

A microspectrophotometer measures which of the following? Electrons Electricity Light absorption Pigments