What is a mole? How is the mole concept useful in chemical calculations?

Q: 2 5 152 A 352.44 155 T 362.31 154 16 D 359.12 153 G 355.67 156 X 365.88 157 Z 369.52 You time travel…

A: Since you have asked multiple questions ,we will solve the first question for you.If you want any…

Q: a. What is the mass of 1.49 x 1024 atoms of chlorine? grams b. What is the mass of 9.12 x 1023…

A: a) mass of 1.49×1024 atoms of chlorine.

Q: A balanced chemical equation contains the term "2Ba(OH)2 8H2O." How many atoms of each element does…

A: Given: The coefficient of Ba(OH)2·8H2O in the reaction = 2

Q: An unknown compound has the following chemical formula: PtCl, where x stands for a whole number.…

A:

Q: A 2.00 g sample of an organic compound contains 0.675 g of carbon. How much carbon would a 4.00 g…

A: ◼️ Given that:  2.00 g of organic sample has 0.675 g Carbon  Carbon in 4.00 g of same organic…

Q: An unknown compound has the following chemical formula: PtCl, where x stands for a whole number.…

A:

Q: A sample of hydrogen sulfide, H2S, had a mass of 51.00 g. Calculate the number of hydrogen sulfide…

A: Given, mass of H2S = 51.00 g number of H2S molecules = ? Note:  molar mass of H2S = 34.1 g/mol

Q: 7. State the chemical composition (constituent elements and number of atoms of each element) for a…

A: Given  is a molecule of citric acid whose molecular formula is C3H4OH(COOH)3.  Chemical composition…

Q: The element silver (Ag) has two naturally occurring isotopes: 109Ag and 107Ag with a mass of 106.905…

A: Average mass = [(mass)1 × % abundance + (mass)2 × % abundance ] / 100   …(1) Average atomic mass…

Q: The empirical formula of propylene is CH2. An experimental determination of the molar mass of…

A: Let the number of carbon atoms be n and the number of hydrogen atoms be 2n in the molecular formula…

Q: 2. A 4.626 milligram sample of a hydrocarbon, upon combustion in a combustion analysis apparatus,…

A:

Q: A student weighs out 94.53 grams of sodium permanganate, NaMnO4.  How many moles of NaMnO4 is this?…

A: Moles— It is the ratio of given mass of a compound to its molar mass  Mole = given mass / molar mass…

Q: An unknown compound has the following chemical formula: P2Ox where x stands for a whole number.…

A: Given :-  chemical formula ; P2Ox  no. of moles of O = 8.4 mol  no.of moles of P = 3.34 mol  To…

Q: A student heated calcium carbonate (CaCO3) producing calcium oxide (CaO) and carbon dioxide (CO2).…

A: The Law of Conservation of Mass is that mass is neither created nor destroyed in chemical reactions.…

Q: An unknown compound has the following chemical formula: PtCly where x stands for a whole number.…

A: Here, the unknown compound given is PtClx. No of moles of Pt and Cl are given .we have to find…

Q: cond A B C D sketch of molecules in it H H C1O H-Ö C нӧ- H H :O: H H H-Ö H-Ö C H C || :0: C O: 010…

A: first, we have to find empirical formula of the given compounds

Q: 5. A bottle of Ibuprofen (C,,H,,O,) contains 1.204 x 1024 molecules. How many grams of ibuprofen are…

A: The molecular weight is 206.29 g/mol means 1 mol of ibuprofen = 206.29 g of ibuprofen

Q: sample contains 52.0 g of elemental phosphorus, P4. Determine the number of moles of P4 and the…

A: Given ,  sample contains 52.0 g of elemental phosphorus, P4. To Determine the number of moles of P4…

Q: An unknown compound has the following chemical formula: Al,Cl where x stands for a whole number.…

A: given formula = Al2Clx

Q: The element rhenium (Re) has two naturally occurring isotopes, 185 Re and 187 Re. Rhenium is 62.60%…

A:

Q: Fullerenes are molecules composed of only carbon atoms. One fullerene is C60 a carbon molecule…

A: The number of moles of a substance is defined as the mass of the substance upon its molar mass.

Q: Chemistry An element consists of 4.35% of an isotope with mass 49.946 u, 83.79% of an isotope with…

A: calculate the average atomic mass- firstly multiply the fraction by the mass number for each…

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: Benzene and acetylene have the same empirical formula, CH. However, benzene has a molar mass of…

A:

Q: An unknown compound has the following chemical formula: NO, where X stands for a whole number.…

A:

Q: An unknown compound has the following chemical formula: P,Cl, where x stands for a whole number.…

A: What is the value of x in PxCl3 =?

Q: Part A. What is the mass of 9.50 moles of magnesium chloride, MgCl2? Express your answer with…

A: Part A: Calculation of mass of MgCl2 : The number of moles of MgCl2 = 9.50 moles The mass of a…

Q: 9- An unknown compound is composed of C, H, and O. A 0.1005 g sample of this compound is combusted,…

A: We have to predict the empirical formula of compound 0.1005 g sample, produces 0.2829 g of CO2,…

Q: The number of particles and amount, respectively, in 45.2 g of potassium nitrate is 2.69 x 10 22…

A:

Q: A sample of trifluoroacetic acid, C2HF3O2, contains 60.9 g of oxygen. Calculate the mass of the…

A: Sample of trifluoroacetic acid molecular weight                          = (12× 2+ 1+ 3×19+ 16×2) g…

Q: A molecular formula expresses the number of each kind of atom in a molecule. For example, the…

A: Given: Mass of compound = 6.50 g Mass of CO2 = 9.53 g. Mass of H2O = 3.90 g. Molar mass of CO2 = 44…

Q: examples

A: Carbon based nanomaterials such as fullerene, carbon fibers, carbon nanotubes, nanodiamonds are…

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46…

A: Average atomic mass = m1f1 + m2f2 + m3f3

Q: The element silver (Ag) has two naturally occurring isotopes:109 Ag and 107Ag with a mass of 106.905…

A:

Q: Write the balanced chemical equation for the reaction of aqueous potassium hydroxide with aqueous…

A: Chemical equation is the representation of a chemical reaction, in which the reactants and products…

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.