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A mixture of FeO with Fe3O4 when heated in air to a constant mass gains 5% by mass. Compute the composition of the mixture Atomis mass Fe=55.8
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How many grams of H2SO4 must be dissolved into 0.709 L of solution to generate a concentration of 0.303 M?
Sodium sulfide (11.7 g) reacts with hydrochloric acid (16.7 ml, 12.0 M) to yield sodium chloride and hydrogen sulfide. What is the theoretical yield (g) of hydrogen sulfide?
A mass of 8.15 gC 2 H 4 ( g ) reacts with excess oxygen. If 16.2 g CO 2 ( g ) is collected, what is the percent yield of the reaction? C 2 H 4 ( g ) + 3O 2 ( g )® 2CO 2 ( g ) +2H 2 O( g )
Why does a hydrate exist only as a solid? What characteristic of a hydrate is responsible for this phenomenon?
What is the subshell electron configuration for the Ca20 atom? Which are valence electrons and how many valence electrons are there?
What is the molarity, to the hundredths place, of 5.0 g HPO3 in 300. mL of solution?
When .514g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.8 degrees C to 29.4 degrees C. Find delta E(rxn) for the combustion of biphenylin kJ/mol. The heat capacity of the ...
A chemist adds 190.0 mL of a 2.8*10^-6 mol/L mercury(I) chloride (Hg2Cl2) solution to reaction flask. Calculate the micromoles of mercury(I) chloride the chemist has added to the flask. Round your answer to 2 significant ...
What would an increase in the metal wire mass indicate when the metal wire starts to form copper on it from a chemical reaction from 6M HCl and copper (II) sulfate pentahydrate? What would a decrease in the metal wire ma ...
Do you notice any trends or can you make any generalizations about where certain types of liquids fall on the pH scale?
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