7 Answered Questions for the topic Chemicals

05/20/21

Practice #5- limiting reactant in grams

Which is the greatest amount of silicon tetraflouride in grams that can be produced 48 grams of HF and 92 grams of SiO2? Which reactant is limiting? How many grams of the excess reactant will be... more
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Chemicals Chemistry

11/13/20

About the experiment of the chromatography
Question: If two samples have identical Rf Values does this mean that they are necessarily identical molecules?
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Chemicals Chemistry

10/23/20

How to solve this chemical question? (about chemistry)
It is time for the titration. You measure 15.0 mL of the H2C2O4 solution with a 100-mL graduated cylinder and add it to a 125-mL Erlenmeyer flask. Then you add two drops of the indicator,... more
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Chemicals Chemistry

10/23/20

How to solve this calculation (about chemical)
 It is time for the titration. You measure 15.0 mL of the H2C2O4 solution with a 100-mL graduated cylinder and add it to a 125-mL Erlenmeyer flask. Then you add two drops of the indicator,... more
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Chemicals Chemistry

10/23/20

Is answer correct or not? (about chemical calculation)
Calculate the number of moles of oxalic acid and the molarity of the oxalic acid solution. Molar mass of H2C2O4•2H2O 126.07 g/mol Mass of H2C2O4•2H2O              1.5232g 1) No. of moles of... more
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Chemicals Chemistry

10/23/20

Is this calculation correct up here? (about chemistry)
A student prepared a standard oxalic acid (H2C2O4·2H2O) solution and performed a titration to determine the molarity of an unknown sodium hydroxide (NaOH) solution.Use the data given below to find... more
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04/14/19

Wet photography: what's the second choice after silver halide?
All the film photography I know of - both colour and black-and-white - uses silver halide as the photosensitive component. I suppose that after over a hundred years of wet photography we have a... more
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