Mass of magnesum before experiment is 0.33g  after is 0.49g   Calculate the ratio between the moles of magnesium used and the moles of oxygen used. Express  this ratio in simplest whole-number form.

Q: A compound is determined to contain 66.60% carbon, 15.65% hydrogen and 17.74% oxygen. what is…

A:

Q: 8. Determine the number of CH₂Cl2 molecules in 42.463 g of CH₂Cl₂. The molar mass of CH₂Cl2 is…

A: Avagadro's law states that 1.0 mole of any substance Avagadro number () of species.Number of moles =…

Q: (Review Topics] [Refe Use the References to access important values if neede A compound is found to…

A:

Q: Hydroxylamine contains 42.41 % N and 9.15% H by mass, with the remainder being oxygen. Determine its…

A: The empirical formula can be defined as a chemical formula which gives the proportion of all the…

Q: A salt of copper and oxygen is 88.81% ( by mass) copper. Determine the empirical formula of the…

A: A salt of copper and oxygen is 88.81% (by mass) copper. The empirical formula of the copper oxide…

Q: 4. How many moles are present in 2.45 x 1023 molecules (particles) of CH4?

A:

Q: The principal components in air are oxygen, nitrogen, argon, and carbon dioxide. Air is…

A: The air is composed of 78% nitrogen gas, 21% oxygen gas, 0.93% Argon gas and 0.04% carbon dioxide…

Q: 119: Butanedione, a compound in butter and body odor, has a cheesy smell. Elemental analysis of…

A: Q. 119. Conversion of mass % to grams. Suppose 100 g be the total mass of the compound. In 100 g of…

Q: When 0.2004 g of calcium is heated in pure nitrogen gas, the sample gains 0.04670 g of nitrogen.…

A: The mass of calcium is = 0.2004 g The mass of nitrogen is = 0.04670 g The empirical formula of…

Q: A compound containing only sulfur and arsenic is 30.0% S by mass; the molar mass is 428 g/mol. What…

A: The empirical formula is the chemical formula of any compound that represents the proportions of…

Q: A compound that consists of nitrogen and oxygen is found to be 30.4 % nitrogen by mass. The molar…

A: Given : Nitrogen by mass = 30.4% Molar mass is in between 90g/mol and 100g/mol

Q: How many mole of ions are present in 1.264 mole of potassium chromate?

A: To calculate the moles of ions, we first need to write a ionisation equation of potassium chromate.…

Q: Chemistry Vocabulary WORD WALL percent composition the percent, BY MASS, of all elements in a…

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Q: sodium chloride is 60.66% chlorine by mass. calculate the empirical formula of soduim chloride.

A: An empirical formula represents the simplest whole-number ratio of the atoms present in the…

Q: Determine the molecular formula for a molecule with 3.611024 atoms of Carbon per mole of the…

A: Answer: To solve this question we have to find out the number of moles of carbon, hydrogen and…

Q: What is the advantage of expressing mass in moles?

A: Expressing mass in moles offers several advantages in chemistry. It simplifies calculations,…

Q: 2. The rubbing alcohol was found to have 60% carbon, 13.4 % hydrogen, and the remaining percent by…

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Q: 4. In your own words, explain the difference between an empirical formula and a molecular formula.…

A: Empirical formula and a molecular formula can we defined using proper example.

Q: When 2.50 g of copper metal reacts with molecular oxygen, the copper oxide product of the reaction…

A: Empirical formula represents the simplest whole number ratio of atoms of elements present in the…

Q: Combustion of 1.000g of an organic compound produces 2.360g of CO2 and 0.640g of H2O. A) Determine…

A: Assuming the empirical formula of compound to be CaHbOc.Given : mass of CO2 produced = 2.360 gMass…

Q: When one formula unit of iron (III) sulfide decomposes into elemental iron atoms and sulfur atoms,…

A: The formula of iron(III) sulfide is: Fe2S3   The decomposition  reaction is: Fe2S3   → 2 Fe  + 3 S

Q: When 2.004 g calcium is heated in pure nitrogen gas, the sample gains .4670 g of nitrogen. Calculate…

A: Mass of Calcium = 2.004 g Atomic mass of calcium= 40g/mol Moles of calcium = 2.004g/40g/mol = 0.0501…

Q: Researchers from the University of Cape Town in South Africa have discovered that penguins are able…

A: Empirical formula refers to the formula of a compound in which the elements are present in the…

Q: Suppose you’re giving the mass of each element in a compound sample . To calculate the empirical…

A: Given : Mass of elements in the compound. To find : Empirical formula of the compound.

Q: The percent by mass of nitrogen for a compound is found to be 46.7%. Which of the following could be…

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Q: Arsenic reacts with oxygen to form a compound AsxOy. If 2.354g of arsenic forms 3.611g of the…

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Q: 33: A pure silver ring contains 0.0134 mmol (milimol) Ag. How many silver atoms does it contain?

A: 33) Given : Moles of silver = 0.0134 mmol = 1.34 X 10-5 mol.…

Q: cumene is compound comtaining only carbon and hydrogen that is used in the production of acetone and…

A: Interpretation: The range of molar mass of cumene that contains only carbon and hydrogen is given.…

Q: theoretical yield of chemical formulas

A: The theoretical yield is the amount predicted by a stoichiometric calculation based on the number of…

Q: Determine the empirical formula of a compound that contains only C, H and O. This compound is…

A: Given : Mass percent of C = 75.9 % Mass percent of H = 8.80 % And mass percent of O = 15.51 %

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.