Questions from General Chemistry

Q: For each of the following balanced chemical equations, calculate how many

For each of the following balanced chemical equations, calculate how many moles and how many grams of each product would be produced by the complete conversion of 0.50 mole of the reactant indicated i...

Q: Silicon carbide, SiC, is one of the hardest materials known

Silicon carbide, SiC, is one of the hardest materials known. Surpassed in hardness only by diamond, it is sometimes known commercially as carborundum. Silicon carbide is used primarily as an abrasive...

Q: Your text talks about several sorts of “yield” when experiments

Your text talks about several sorts of “yield” when experiments are performed in the laboratory. Students often confuse these terms. Define, compare, and contrast what are meant by theoretical yield,...

Q: An air bag is deployed by utilizing the following reaction (the

An air bag is deployed by utilizing the following reaction (the nitrogen gas produced inflates the air bag): 2NaN3(s) 2Na(s) + 3N2(g) If 10.5 g of NaN3 is decomposed, what theoretica...

Q: The compound sodium thiosulfate pentahydrate, Na2S2O3.5H2O, is important

The compound sodium thiosulfate pentahydrate, Na2S2O3.5H2O, is important commercially to the photography business as “hypo,” because it has the ability to dissolve unreacted silver salts from photogra...

Q: Alkali metal hydroxides are sometimes used to “scrub” excess carbon

Alkali metal hydroxides are sometimes used to “scrub” excess carbon dioxide from the air in closed spaces (such as submarines and spacecraft). For example, lithium hydroxide reacts with carbon dioxide...

Q: Although they were formerly called the inert gases, at least the

Although they were formerly called the inert gases, at least the heavier elements of Group 8 do form relatively stable compounds. For example, xenon combines directly with elemental fluorine at elevat...

Q: Solid copper can be produced by passing gaseous ammonia over solid copper

Solid copper can be produced by passing gaseous ammonia over solid copper(II) oxide at high temperatures. The other products of the reaction are nitrogen gas and water vapor. The balanced equation for...

Q: Natural waters often contain relatively high levels of calcium ion, Ca21

Natural waters often contain relatively high levels of calcium ion, Ca21, and hydrogen carbonate ion (bicarbonate), HCO3-, from the leaching of minerals into the water. When such water is used commerc...

Q: One process for the commercial production of baking soda (sodium hydrogen

One process for the commercial production of baking soda (sodium hydrogen carbonate) involves the following reaction, in which the carbon dioxide is used in its solid form (“dry ice”) both to serve as...