How many carbon atoms are in 21 molecules of benzene, C̟H,?

Q: Determine the exact number of H atoms in the empirical formula of the compound composed of…

A: Calculate the emprical formulaC⇒64.817768 %H⇒13.597446%O⇒21.585325%C=64.81g  x112.0xmolesg=5.39…

Q: How many moles of He are 221,000 He atoms?

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: How many moles are in 5.50 × 1023 molecules of carbon monoxide?

A: We know that   1 mole of any substance contains Avogadro’s Number (6.022 × 1023 molecules ) of…

Q: Which of the following would contain the highest number of atoms?

A: Number of moles = mass/molar mass.  1 mol contains 6.022 × 1023 atoms

Q: Chromium(III) nitrate forms a hydrate that is40.50% water by mass. What is its chemical formula?

A: If 100 % mass of Chromium nitrate is present and 40.50 % is the mass of water. Mass of anhydrous…

Q: How many oxygen atoms are in 0.68 moles of acetic acid ?

A: The number of moles of acetic acid is = 0.68 mole The number of oxygen atoms in this amount is =?

Q: What is the empirical formula for perfluoropropane if the compound contains 81% fluorine and 19%…

A: Empirical formula of a chemical compound is that chemical formula which represents the simplest…

Q: Write a sentence that describes how to determine the number of moles of a compound in a known mass…

A: Moles of any substance is defined as the 6.022 X 1023 molecules of the substance.

Q: How many total atoms are in 0.620 g of P,O,? total atoms:

A:

Q: References) What number of molecules (or formula units) are present in 5.12 g of each of the…

A: Given: mass=5.12 g To find: Molecules present in 5.12 g of each of the compounds

Q: A sample contains 56.36% oxygen by mass, and the rest phosphorus. If the molecular mass is 316.40g,…

A:

Q: This is the chemical formula for diethyl ether: (CH,CH,),O. . Calculate the mass percent of hydrogen…

A: Given :-  chemical formula of diethyl ether = (CH3CH2)2O  To calculate :-  mass percent of Hydrogen…

Q: How many chlorine atoms are in 27 molecules of chloroform, CHCI,?

A: CHCl3 is a polar organic compound and is used as solvent in various organic reactions. It is made up…

Q: How molecules of nitrogen dioxide are present in 4.61 moles of this compound? many

A: Given : moles of nitrogen dioxide i.e NO2 = 4.61 mol.

Q: how many chlorine atoms are in 27 molecules of chloroform, CHCl3.

A: The molecular formula of the compound given is CHCl3.

Q: An oxide of iron is found to be 70% iron by mass, what is the empirical formula for this compound…

A: An oxide of iron is given that has the following mass % compositions: Mass percentage Fe =70 % Mass…

Q: How many chlorine atoms are in 31 molecules of chloroform, CHCI:?

A:

Q: How many hydrogen atoms are in 12.64 moles of heptane?

A:

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

A:

Q: Calculate the number of atoms or molecules in

A: One mole of a substance is equal to Avagadro no. (6.022 x 1023 molecular entities, i.e. atoms,…

Q: n. What is the empirical formula?

A:

Q: How many moles of silicon are in th

A:

Q: a. How many molecules of carbon tetrachloride are present in 3.37 moles of this compound? molecules

A: This problem can be solved by knowing the number of molecules presentin one mole.…

Q: The mineral pyrolusite is a compound of manganese-55 and oxygen-16. If 63% of the mass of pyrolusite…

A: Given: Mass % of manganese in pyrolusite = 63% Molar mass of Mn = 55 g/mol Molar mass of O = 16…

Q: Calculate the mass of 500. atoms of iron (Fe).

A:

Q: 1 mol of ibuprofen, C13H18O2, contains how many mol of atoms?

A: The molecular formula of ibuprofen is C13H18O2  Hence from the formula we can see that 1 molecule of…

Q: One molecule of H2SO4 would have a mass in grams equal to?

A: Given, one molecule of H2SO4we are asked to calculate the mass of one molecule of H2SO4 in grams.

Q: In contrast, a liter of water contains 55 moles of water.  How many water molecules are in a mole?

A: Number of moles of water = 55 moles

Q: There are approximately 7.3 billion people on earth, how many moles of people is this?

A: 1billion = 1,000,000,000 7.3 billion = 7.3×1,000,000,000 people

Q: How many molecules and atoms are in 3 moles of N,H, 24

A: Mole: It is defined as the ratio of moles to the molar mass mole=massmolar mass To calculate the…

Q: How many moles are in 9.3 × 1024 molecules of carbon dioxide?

A:

Q: According to the chemical formula and atomic masses in the periodic table, what is the molar mass of…

A: The mass of C = 12.0107g/mol The mass of H = 1.00784 g/mol

Q: A compound is 55.26% potassium, 14.59% phosphorus, and 30.15% oxygen. What will be the empirical…

A: Each percentage represents the number of grams of that element per 100 grams of that compound.  Now…

Q: Question 15 of 60 Submit How many molecules are in 57.2 moles of CH,?

A:

Q: How many formula units are contained in 78 g of calcium fluoride, CaF,?

A: Number of moles is the term which is used to express the amount of the compound or the element in…

Q: How many carbon atoms are in 8.79 moles of Decane?

A: Decane has the structural formula - C10H22

Q: What is the total number of atoms in a molecule of each of the following compounds?

A:

Q: What is the empirical formula for this compound?

A: Number of moles = mass/molar mass  Molar mass of Oxygen = 16 g/mol  Molar mass of nitrogen = 14…

Q: The mineral pyrolusite is a compound of manganese and oxygen. If 63.19% of the mass of pyrolusite is…

A: The empirical formula of a chemical compound is the simplest positive integer ratio of atoms present…

Q: How many moles of He are 221,000 He atoms?

A:

Q: Problem attached

A: Moles of the given compound for each atom can be calculated as follows: n=mM where n: number of…

Q: atoms

A:

Q: How many moles are in 2.6 × 10 23 molecules of acetic acid

A:

Q: What is the mass (grams) of 2500. carbon atoms?

A:

Q: How many total atoms are in a sample of 10.0 grams of disilicon tetrachloride?

A:

Q: What mass of sulfur hexafluoride, SF, has the same number of fluorine atoms as 25.0 g of oxygen…

A:

Q: How many atoms of oxygen are in 0.66 moles of aluminum acetate?

A:

Q: What is the empirical formula of glucose?

A: An empirical formula represents the lowest whole number ratio of elements in a compound.The…

Q: b) What is the molecular formula given that its mass is 121 g. ( to

A: Given;

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.