The empirical formula of a compound is CH, If the molar mass of this compound is about 13, what is its molecular formula ?

Q: 10. Make the following conversions: (a) 28.4 g S to moles S (b) 2.50 kg Nacl to moles Nacl (c) 42.2…

A: Number of moles = mass ÷ molar mass

Q: The “lead” in lead pencils is actually almost pure carbon and the mass of a period mark made by a…

A: Answer = 5.02 x 10 19

Q: Sulfur (S8), combines with oxygen (O2) at elevated temperatures to form sulfur dioxide. How many…

A: A question based on molecules that is to be accomplished.

Q: how many chlorine atoms are in those 20.3 grams of carbon tetrachloride?

A:

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 chemical formula of trinitrotoluene (TNT) is C7H5N3O6. What is the molecular mass of TNT?…

A: We have to find the molecular mass of trinitrotoluene (TNT) is C7H5N3O6. Atomic mass of Carbon =…

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: 6.5 x 10²³ atoms of H is equal to how many moles H?

A: Number of units in one mole of any substance is defined by Avogadro's number and it is  equal to…

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

A:

Q: A 13.0-g sample of titanium reacts with oxygen to form 21.6 g of metal oxide. What is the empirical…

A: Given that  Mass of Titanium reacted = 13.0 g  Mass of metal oxide formed = 21.6 g  Empirical…

Q: The bitter-tasting compound quinine is a component of tonic water and is used as a protection…

A: Data given: Mass of the sample = 0.487 g Mass of carbon dioxide produced = 1.321 g Mass of water…

Q: 1. Law of Conservation of Mass. When diamond-a pure form of carbon-is burned in an oxygen…

A: C + O2-------> CO2

Q: A 1932 silver quarter has a mass of 6.25 grams. It is 10% copper and the remainder is silver. How…

A: Answer: Number of moles of a substance in the given sample is always equal to the ratio of mass of…

Q: Is the subscript of an element the same as its number of moles? Does the subscript mean how much…

A:

Q: . He can tell from elemental analysis that the polymer is made up of only three elements: carbon,…

A: To solve this we have to consider the mass of polymer = 100.0g  Then  Mass of C = 56.45 g  Mass of H…

Q: A sample of propane, C3H8, contains 13.8 molesmoles of carbon atoms. How many total moles of atoms…

A:

Q: What is the percent by mass of oxygen in ethylene glycol, C2H4(OH)2?   The answer is …………………………. 4

A: The question is based on the concept of mass percentage.   amount of substance present in hundred…

Q: Avogadro’s number is defined as   the number of atoms in exactly 12 g of carbon-12. the number of…

A: Which one of the following is correct

Q: If atoms of magenesium (Mg) and atoms of 10 chlorine (Cl) could bump into each other, could they…

A: Whether they combine to form any substance has to be determined The number of molecules would be…

Q: And iron ore contains 58.0% iron oxide. Iron constitute 70.0% of iron oxide. How much iron is there…

A: Given, an iron contains 58.0% of iron oxide which means 100 g of iron ore contain 58 g of iron…

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

A: Given :-  chemical formula of unknown compound = NOx  no.of moles of O = 5.1 mol  no.of moles of N =…

Q: 5) Find the mass of 0.02 moles of K,Cr,O,. 7'

A:

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

A: Given, An unknown compound has the following chemical formula: NOx moles of oxygen = 2.9 mol moles…

Q: In chemistry, what is meant by the term “mole?” What is the importance of the mole concept

A: Mole is a unit to  express the mass, Number and volume of a Substance in Chemistry.  It is a bigger…

Q: How many molecules of CH4 are there in a 218.4 gram sample of CH4 ?

A:

Q: average atomic mass

A:

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: When 2.375 grams of a hydrocarbon CxHy, we're burned in a combustion analysis apparatus, 7.451 grams…

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: 0.172 g of Mn was heated in the presence of oxygen to make 0.272 g of MnxOy.  Based on this data,…

A:

Q: In Alice's Wonderland, every element is different from those in our world. There is a pure unknown…

A: to find out, the empirical and molecular formula, first we need to moles of each element present in…

Q: 3. An oxide of chromium is made up of 5.20g chromium and 5.60 g oxygen. What is the empirical…

A: Given,  Mass of Cr = 5.20 g  Mass of O = 5.60 g What is the empirical formula of the oxide = ?

Q: Part a) Mr. Scholl likes to grow tomatoes in his backyard garden. Last year he grew a 6.27 × 10 to…

A:

Q: How many molecules are in 6.26 grams of sulfur dioxide? ______ molecules What is the mass in grams…

A:

Q: 5. Compound X is composed of 52.2% carbon, 13.0% hydrogen, and the rest oxygen, by mass. The…

A: Compound X contain C= 52.2%                                    H= 13%…

Q: Five moles of sulfur dioxide, SO2, would consist of how many molecules?

A: Given, 5 moles of SO2 1 mol of a compound contains  number of molecules.

Q: Imagine that all our balances displayed mass in units of slugs instead of grams. Would we still…

A:

Q: Calculating Percent Composition Directions Use the equation below to calculate the percent…

A: % by mass = {mass of element / mass of compound} × 100  'or'  % by mass ={(no of atoms of an…

Q: 4. A sample of acetic acid has 4.22x1024 molecules. How many grams of hydrogen are present?

A:

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.