3. Chemical Reactions

Empirical Formula

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Determine the simplest form of a compound made up of carbon, hydrogen, nitrogen and oxygen if it is made of 49.48% C, 5.19% H and 16.48% O.
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Domanda aperta
Some of the formulas below could be either molecular or empirical formulas; however, some could only be molecular formulas. Which of the following formulas must be molecular formulas? Select all that apply.
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Scelta multipla
In order to make 1 s’ more, you need 2 graham crackers, 1 piece of chocolate, and 1 marshmallow. How many s’mores can be made from the following ingredients?
7 graham crackers, 6 pieces of chocolate, and 5 marshmallows
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Scelta multipla
What is the empirical formula of acetic acid, CH3COOH?
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Scelta multipla
A compound composed of potassium, manganese and oxygen contains 3.12 g potassium and 1.922 x 10²³ oxygen atoms. If a sample of the compound weighs 12.61 g determine its empirical formula.
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Domanda aperta
An example of an empirical formula is
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Domanda aperta
A chemist decomposes samples of several compounds; the masses of their constituent elements are listed. calculate the empirical formula for each compound.
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Scelta multipla
What is the empirical formula for a compound containing 34.4% ethylenediamine, 2.101% Ni, 3.44% sulfate, and 60.06% water by mass?
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Domanda aperta
What are the subscripts in the empirical formula of this compound?
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Scelta multipla
In an experiment, 10.0 g of sulfur and 10.0 g of oxygen react completely to form an oxide of sulfur. What is its empirical formula?
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Domanda aperta
A 4.08 g sample of a compound of nitrogen and oxygen contains 3.01 g of oxygen. What is the empirical formula?
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Domanda aperta
A sample of an iron-containing compound is 22.0% iron, 50.2% oxygen, and 27.8% chlorine by mass.
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Scelta multipla
An unknown compound contains only carbon, hydrogen, and chlorine. Using combustion analysis, you burned 22.56 mg of the sample and collected 7.11 mg of H2O and 52.93 mg of CO2. What is the empirical formula of this compound?
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Domanda aperta
What is the empirical formula for a compound that is 43.6% phosphorus and 56.4% oxygen?
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Domanda aperta
To indicate the number of atoms of each element present in a molecular compound, scientists use -
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