You can also calculate percent composition from a formula. This is similar to percent abundance in that what percentage of a compound is each element. If you look at the compound and tell how many of each element there is, you calculate the percent composition.  Ex. Calculate the total mass of a compound just like before - CO2 C = 1 X 12 = 12g O = 2 X 16 = 32g 12+32 = 44g Then take the mass of each and divide by the total. 12/44 X100 = 27% carbon 32/44 X 100 = 73% oxygen  CO2 is 27% carbon and 73% oxygen. What percentage of Na3PO4 is sodium (Na)?

Q: How many formula units are in 0.032 moles of Fe2O3? A sample of 7.30x10^24 atoms of silver weighs…

A: We need to calculate  formula units in 0.032 moles of Fe2O3 mass of 7.30x1024 atoms of silver…

Q: 2. A sample of a substance containing only carbon, hydrogen, and oxygen has mass x in grams. It is…

A: The equation for the burning of carbohydrate is: x12a+b+16c CaHbOc  +  O2   →    y44CO2  +  Z18…

Q: If the sample has a molar mass of 176.0 g/mol, what is the molecular formula of the sample?

A:

Q: A lab analysis of an organic compound showed it is made up of 60.00% C, 5.75% H, and 34.25% O. If…

A: Given, C = 60.00 %  H = 5.75 %  O = 34.25 %  Molecular mass = 560.56 g/mol

Q: Predict the element that will have the highest mass percent composition in each compound without…

A: a. Given: C3​H6​O;MC​=12.01g/mol;MH​=1.01g/mol;MO​=16.00g/molStep 1: Solve for the molar mass of the…

Q: A 1-carat diamond is pure crystaline carbon and has a mass of 0.200 g.Which contains more carbon…

A:

Q: How many atoms are contained in 0.98 moles of iron (Fe)?

A:

Q: A particular protein sample is found to have 1 atom of iron in its chemical formula. If the mass…

A: Number of iron atom = 1 Mass percent of  Fe in the compound = 0.330 %

Q: Draw the major organic product of the reaction shown below. PBr3 *** OH • You do not have to…

A: Given a  alcohol and reagent PBr3 . Draw the product.

Q: You have 28.83 liters of oleic acid. Find the number of molecules in this sample. Oleic acid has a…

A:

Q: D. Calculate the mass (g) of the following samples. 25) 238 moles of lead 26) 1.54 x 10° moles of Zn…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: Determine the moles of barium in each sample. Be sure each of your answer entries has the correct…

A: Part 1) 731. g Ba:To find the number of moles of barium, we'll divide the given mass by the molar…

Q: Sucrose has the molecular formula C12H22011. If a sucrose sample contains 9.0 x 1024 atoms of…

A: Given, Sucrose has the molecular formula: C12H22O11 A sucrose sample contains, Number of atoms of…

Q: Write out the conversion factor of the given element in the given compound using the mass percent…

A: Mass percent composition is the percent by weight. It is abbreviated as w/w%.For a solution, mass…

Q: mass

A:

Q: How many molecules are there in 39 grams of oxygen? 39.0 g O, x =? molecules O2 32.00 g 02=1 mol O2…

A: Applying formula of moles  n=w/m  No of molecules=n×NA

Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A:

Q: In a universe far, far away, there exists an alien world where they have a different periodic table,…

A:

Q: 1.A compound is composed of the elements C, H, O, and Br. Combustion analysis of a 6.17 g sample of…

A: The amount of CO2 formed from 6.17 g of the sample = 3.91 g The amount of H2O formed from 6.17 g of…

Q: What is the mass in grams of 7.94 x 1015 molecules of CS,?

A:

Q: What is thé mass percentage of C in codeine, C18H21NO3? Provide an answer to two decimal places.

A: Given : We have to calculate mass percentage of carbon in codeine.

Q: What is the mass percent of silicon dioxide (SiO2) if you are able to separate 2.202g out of a…

A: The mass percentage of a compound in a mixture is equal to the ratio of the mass of that compound…

Q: An air conditioner compressor contains pure CClF3, also known as the refrigerant R-13. CClF3 has a…

A: We know that, density can be expressed as the mass per unit volume, i.e.…

Q: A newly found compound was discovered to contain 4 iron atoms. If the molar mass of this compound is…

A:

Q: Tartaric acid is the white, powdery substance that coats sour candies such as Sour Patch Kids.…

A: To solve this problem first we find the mass of C , H and O  Then the number of mole of each to get…

Q: How many moles of carbon are there in a 7.000 g (35.00 carat) diamond? Express your answer in moles…

A:

Q: CHEMWORK With the advent of techniques such as scanning tunneling microscopy, it is now possible to…

A: The advent of advanced techniques such as scanning tunneling microscopy has revolutionized the field…

Q: Formula Molar mass of ion   Number of ions   Mass of ion in one mole of barium iodide Cation Ba2+…

A: We have to just collect data and then add them up

Q: A balanced chemical equation contains the term "2Ba(OH)2-8H₂O", which is used as a lubricating…

A: Given: The coefficient of  is 2.

Q: Name each compound, and then calculate its mass. Express this value in scientific notation. a. 4.5 x…

A: Given Moles of Co(NO3)2 = 4.5 x 10-3 mol

Q: Consider the following table: Substance Density (g/mL) Gold (s) 19.32 Silver (s) 10.49 Lead (s)…

A: Density can be defined as mass divided by volume which is represented as; Density=MassVolume…

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.