Ethane, C2H6, burns in oxygen as follows. C2H6 + O2  CO2 + H2O
What mass of carbon dioxide is produced if 10.2 g of ethane and 44.6 g of oxygen are mixed and ignited? ( Ans = 29.9 g of carbon dioxide check 29 or 20)

No copying 15 pts how does a free-body diagram tell you about the net force on an object?

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 approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3? a. 0.42 g b. 2.4 g c. 42 g d. 260 g