The total count of atoms in 1.3 mol of argon in its elemental form is:

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: molecular formulas is also an empirical formula?

A: An empirical formula is defined as the minimum ratio of each of the elements present in a molecule.…

Q: A compound has the chemical formula CaX2, where X is an unknown nonmetal. The percent by mass of Ca…

A: Percentage by mass of compound means if total compound is 100 g then that component has mass…

Q: What is the mass, in grams, of 1 mole of oxygen atoms?

A: Given :- number of moles of O = 1 mol  To calculate :- mass of 1 mol O atoms 1 mol contains 6.022 ×…

Q: How many moles of tin atoms are in a pure tin cup with mass of 38.1 g? a

A: Given data: The mass of tin atoms = 38.1 g. To find: The number of moles of tin atoms.

Q: The empirical formula of a compound is CH. If themolar mass of this compound is about 78 g, what is…

A: Empirical formula is the simplest ratio of the elements in a compound whereas molecular formula is…

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

A:

Q: Explain the problem with the following statement and correct it. “When a chemical equation is…

A: The given statement is to be corrected by explaining the error with it. The given statement is:…

Q: Determine the percentage by mass of an element in "salt"

A: Chemical Formula of Table Salt = NaCl Molar Mass of NaCl = 58.44 g/mol Mass of Element Na = 22.99…

Q: What is the percent by mass of hydrogen in sulfuric acid

A: Molar Mass of H = 1 g/mol Molar mass of H2SO4 = 98 g/mol

Q: A sample of chloroethane, C,H,CI, contains 0.274 mol of the compound. What is the mass of the…

A: Number of moles = mass ÷ molecular mass Mass of compound=  number of moles× molecular mass For…

Q: A molecule has an empirical formula of NO. If the molar mass of the molecular formula is 117g/mol,…

A: We have to calculate the molecular formula.

Q: the same weight Since moles of H2 is maximum, it will have the weight the same number of molecules…

A: The question is based on mole concept. we have to identify the correct statement based on the molar…

Q: The percent by mass of nitrogen for a compound is found to be 63.7%. Which of the following could be…

A: Given -> Percent by mass of nitrogen = 63.7%

Q: Determine the number of atoms and the mass of zirconium, silicon, and oxygen found in 0.3384 mol of…

A: No of atom= atomicity ×total no of molecule×6×1023 atomicity= total no of atoms in 1 molecule  Which…

Q: Calculate the mass % of H in ammonium bicarbonate.

A: We have been asked the mass % of H in ammonium bicarbonate.

Q: The number of moles of atoms in one mole of carbon dioxide gas, CO2, is

A: Given :- number of moles of CO2 = 1 mol  To calculate :- number of moles of atoms in 1 mol CO2

Q: Calculate each of the following: (a) Mass fraction of Cl in calcium chlorate (b) Mass fraction of N…

A:

Q: The molar mass of boron is 10.81 g/mole. What is the mass of a single boron atom?

A: Given, Molar Mass of Boron is 10.81 g/mol. General formula is: 1 mole = 6.023 x 1023 atoms.

Q: How many mol of lead (Pb) atoms are equivalent to six billionlead atoms?

A: We know that 1 billion = 109 So, 6 billion = 6×109 Atomic weight of lead (Pb) = 207

Q: What is the average mass of a single argon atom in grams?

A: Ratio of molar mass to avogadro's  number is known as the average mass of single atom

Q: What is a MOLE? O Aunit of substance containing a certain amount expressed in grams O Aunit of…

A: The given question asks to select the right option that accurately defines a mole of any substance.

Q: What is the mass in grams of one manganese atom?

A: The mass of one manganese atom is 54.938044 u, where u stands for atomic mass unit.

Q: What advantage is there to using a counting unit (the mole) inchemistry rather than a mass unit?

A: Using counting unit as mole in chemistry is advantageous as with help of this we can inter convert…

Q: Consider a sample of carbon tetrafluoride that contains 2.13 × 1024 atoms of fluorine. Using the…

A:

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

A: Given that the percent by mass of nitrogen in the compound is 46.7%.

Q: An element’s molar mass in grams per mole is numerically equal tothe element’s atomic mass in atomic…

A: An element's molar mass in g/mol  is numerically equal to the element's atomic mass in atomic mass…

Q: True

A: Question True or false, the molar mass of a substance is the total mass of all atoms in the chemical…

Q: The % sulfur in sulfur dioxide is

A: The atomic mass of Sulfur =32 g The atomic mass of Oxygen =16 g So, the mass of compound SO2=32+16×2…

Q: Number of atoms of Carbon in 19 moles of C4H10 are:

A: Recall the data, moles of C4H10=19 moles  no. of carbon atom ?

Q: How many total atoms are in 0.760 g of P, O,?

A: Mass of P2O5 = 0.760 g Molar Mass of P2O5 = 141.94 g mol-1

Q: Which of the following has the largest moles of oxygen per mole of the molecule?

A: 1 mole of any substance = avogadro number of particles                                          =…

Q: The percent by mass of nitrogen for a compound is found to be 30.5%. Which of the following could be…

A: Percentage by mass of element in a compound  = Mass of element  × 100 / Mass of compound

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

A:

Q: Complete the table below for calculating the formula weight of the ionic compound aluminum oxide,…

A: To solve this we use the atomic weights of ions . As we know that the formula weight is the sum of…

Q: How many atoms are present in a 0.300-mole sample of gold?

A: The number of molecules from the number of moles of a compound can be determined by Avogadro's…

Q: Is formula mass different from molecular mass and molar mass? Or they can be used interchangeably in…

A: Given: Three terms are given formula mass, molecular mass and molar mass To find: whether these are…

Q: In 574 g of a binary substance of molecular formula MO2 there are 1.57 × 1025 oxygen atoms.…

A: The given data contains, mass of a binary substance = 574 g Number of 'O' atoms = 1.57 x 1025

Q: 0.238g of carbon were burned in the presence of oxygen, the resulting mass was 0.872g. What is the…

A: Amount of carbon = 0.238 g Amount of product = 0.872 g Carbon + Oxygen → Product

Q: The oxygen gas (O2) in a cylinder has a mass of 360 grams. How many moles of oxygen are present in…

A: The number of moles of solute is defined by the ratio of the mass to the molar mass.

Q: Consider a sample of carbon tetrafluoride that contains 1.39 × 10²⁴ atoms of fluorine.  Using the…

A: Given  Number of mole of F in CF4  = 2.31 mole Number of mole of CF4 = ?

Q: Which one of the following contains the most moles of hydrogen atoms?

A: (A) Each C2H6 contains 6 H atoms.  5 mol of C2H6 contains 6 x 5 = 30 mol of H atoms.

Q: The percent by mass of nitrogen for a compound is found to be 30.5%, Which of the following could be…

A:

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

A:

Q: Caroline knows the amount of a compound in moles. To find the number of molecules in the given…

A: it was known, the amount of a compound in moles.

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

A:

Q: 9) How many molecules of SO, are in 200 g of SO,?

A:

Q: Which of the molecular formulas below is also an empirical formula?

A: Empirical formula shows the simplest whole number ratio of atoms in a compound. But, molecular…

Q: Consider a sample of carbon tetrafluoride that contains 1.01 × 10²⁴ atoms of fluorine. Determine…

A: Given:

Q: The molar mass is the mass of 6.022 x 1023 particles of matter. O True OFalse

A: We know that, Avogadro number =6.022 × 1023 partical/mol so,

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.