Other Chemistry Answers

Calculate the number of molecules present in .20 moles of H2O.

(H2O) the 2 is a subscript.

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write an equation for the precipitation (if any) that occurs when solution of sodium sulfate (Na2SO4) and barium chloride (BaCl2) are mixed. Write balanced molecular, complete ionic and net ionic equations for the reaction.

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I was wondering what is the difference between gelatin extracted from animals, fish or vegetables and if they carry any DNA traces to their origin.
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Determine the percentage composition of each element in Na2PO3

White Phosphorus P consist of P4 molecules it spontaneously ignites on contact with air. If there are 0.350 mole of P4 molecules. how many P4 molecules are present? What is the mass in grams of a sample? How many P atoms are present?

1) Dichromate and ferrous ions react in acidic solution to form chromic and ferric ions, respectively. If 1.285 grams of iron(II) bisulfate dissolved in sulfuric acid solution requires 35.78 mL of sodium dichromate solution for complete titration, what is the molarity of the sodium dichromate solution? Show the balanced net ionic and complete chemical equations for this reaction.

2) The sodium dichromate solution from Problem 1 was used to titrate a solution made by dissolving 3.500 g of a pure ferrous salt in sulfuric acid. The titration required 47.22 mL of the sodium dichromate solution. Calculate the percent by mass of iron in the pure salt. The net ionic equation here is the same as in Problem 1. You will not be able to write a balanced molecular equation for this because the anion in the ferrous salt was not specified in this problem.

The percentage composition of a compound is 79.9% copper and 20.1% sulphur. The mass of a sample of the compound is 160.0 g. What are the masses of the copper and sulphur in the sample?

what is the mass of one atom in a sample of 0.543 of oxygen (gas)

weight of 1 atom of an element is 6.644 into 10 power -23 gram .Calculate gram atom of element in 40 kg