In the balanced chemical reaction shown below, what is the molar ratio of O2 to H2O C3H8(g) + 5O2(g)—> 3CO2(g) + 4H2O(g)

A. 4:3
B. 3:1
C. 5:4
D: 5:3

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

What is the work done by the electric force to move a 1 c charge from a to b?