If a sample of (NH4)2CrO4 is found to contain 4.00 · 10-2 mol of Cr atoms how many moles of (NH4)2CrO4 formula units are present? Express your answer in scientific notation.

Q: A 125.6 mg sample of an organic compound containing only carbon, hydrogen, and nitrogen is combusted…

A: Answer The empirical formula is C3H8N The molecular formula is C6H16N2

Q: A 0.025-g sample of a compound composed of boron and hydrogen, with a molecular mass of ~28 amu,…

A: The empirical formula is the chemical formula of any compound that represents the proportions of…

Q: 5. How many molecules are in 1 mole of TNT C,H̟N,O,? 6. How many thallium atoms in 1 mole? 7. How…

A:

Q: What number of molecules (or formula units) are present in 2.93 g of each of the following…

A:

Q: What is the mass, in grams, of 9.55×1024 molecules9.55×1024 molecules of methanol (CH3OH)?

A:

Q: 1. An analysis of a compound having a molar mass of 180 g/mol gives the following percentage…

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: Which of the following could only be an empirical formula? N2H4 N2O4 .N2H6. N2O5

A: Empirical formula of a compound is defined as the formula of a chemical compound in which atoms are…

Q: Which of the following could be an empirical formula?

A: Empirical formula of a compound written with the smallest possible integers.

Q: 2. A compound was analyzed and found to have the following percentage composition by mass: Cu:…

A: Given composition of compound : Cu= 49.73% P= 16.28 % O= 33.99 %

Q: What is the empirical formula and what is the molecular formula for a substance consisting of 24.44%…

A:

Q: When 2.115 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 6.637 grams…

A: First of all we calculate the mass of Carbon in Carbon dioxide and mass of Hydrogen in water. Then…

Q: Opal is a hydrated form of silica. If a laboratory analysis of a sample of opal reveals it to…

A: Hydrated form of silica means some of water molecules are present in form of H2O in silica compound.

Q: What is the mass, in grams, of 9.29×1024 molecules of methanol (CH3OH

A: Given :-9.29x1024 molecules of methanolFirst convert molecules into moles9.29x1024molecules of…

Q: What is the empirical formula for an unknown organic compound, if the compound contains 75% carbon…

A:

Q: Use the balnced equation: 4Al + 3O2 ⇒ 2Al2O3 If I want to produce 16 moles of Al2O3 , how many…

A:

Q: A sample of compound X is subjected to elemental analysis and the following percentages by weight…

A: Given   % C = 39.97 %  % H  =  6.73 %  % O  =  53.30  Empirical formula = ?

Q: Which of the following is an empirical formula? O CSH10 O C3H,O2 O H2O2 O PĄO10

A: The empirical formula may be defined as the simplest positive integer ratio of atoms present in a…

Q: How many moles of bromine atoms are present in a sample that contains 4.53 moles of BBr3 ?

A: From any molecular formula of any molecule, we can determine the moles of each atoms present in it.…

Q: What is the molecular formula of the molecule that has an empirical formula of CH and a molar mass…

A: Given , Empirical formula = CH Molar mass = 78.0 g/mol

Q: Caffeine has the formula C8H10N4O2 . If an average cup of coffee contains approximately 125 mg of…

A: In the international system of units the mole (symbol: mol) is the quantity unit for measurement…

Q: 1. NutraSweet is a popular noncarbohydrate sweetener. Analysis showed that it contains the following…

A: Hello. Since the question contains multiple parts, the first part is solved. In case the solution…

Q: An empirical formula will not provide the following information 1. lowest whole-number ratio of…

A: Empirical formula : Empirical formula is the lowest or simplest  ratio of the atoms present in the…

Q: What are the empirical formula and empirical formula mass for C3H9O3?

A: Given molecule is                          C3H9O3

Q: It is NOT an example of an empirical formula. A. CH4 B. CeH12

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: What is the mass, in grams, of 9.32×1024 molecules9.32×1024 molecules of methanol (CH3OH)?

A:

Q: How many moles are, in 7.99 x 10 I2 molecules .

A:

Q: What number of molecules (or formula units) are present in 8.26 g of each of the following…

A: Given- Weight of substance=8.26g

Q: Ferrocene has the formula Fe(C5H5)2 (a)Chemical amount of ferrocene in 100g of ferrocene (b)Number…

A: This can be solved by using the Molarity and Avogadro's number concept.

Q: A compound has a molar mass of 28.06 g. What is its chemical formula if carbon and hydrogen are…

A: In this question, chemical formula of the compound is to be determined which consists of carbon and…

Q: What is the mass, in grams, of 9.35×1024 molecules9.35×1024 molecules of methanol (CH3OH)?

A: Given information: molecules of methanol (CH3OH) = 9.35×1024

Q: A compound was decomposed and determined to be 51.27 % C, 7.75% H and 40.98 %O  by mass.  What is…

A: Given  C%   = 51.27 % H     = 7.75 %  O     = 40.98 %  Subscript of Carbon in Empirical Formula   =…

Q: Based on their molecular masses, list the molar mass of each substance: Fe,0, CO Fe co,

A: In this question, the molar mass of the given compounds have to be determined: The molar mass of a…

Q: Which of the following cannot be an empirical formula? O 1) Al(SIO3)3 O 2) AGNO3 3) KCI O 4) C4H10

A: Empirical Formula It is a chemical formula showing simplest ratio of elements in a compound.…

Q: A sample of CH 3 F contains 2.71 * 10 ^ 24 molecules. How many moles of CH 3 F are present?

A: Since moles of any molecule = number of molecule / Avogadro's number  Avogadro's number = 6.022 X…

Q: A compound having an approximate molar mass of 150.0–155.0 g has the following percentage…

A: The question is based on the concept of elemental analysis. we have been given percentage of…

Q: 1. What is the molecular formula of the molecule that has an empirical formula of CH2CI and a molar…

A:

Q: How many molecules are in 3.1 x 10-3 g of C9H8O4  ?

A: Given that,  Weight of C9H8O4 = 3.1 x 10-3 g Molar mass of C9H8O4 = 180.16 g/mol Moles of C9H8O4 in…

Q: How many atoms of hydrogen are in 230  g of hydrogen peroxide ( H2O2)?

A:

Q: 10. This question is about compounds used in fertilisers. la) A compound used as a fertiliser has…

A:

Q: What is the number of moles for 2.44 x 1022 NaCl formula units?

A:

Q: A compound that contains only carbon, hydrogen, and sulfur is 30.8 % S and 57.6 % C by mass. What is…

A: The given data contains, Sulphur = 30.8 % Carbon = 57.6 % The % of Hydrogen =100%-(30.8+57.6)%= 11.6…

Q: What number of molecules (or formula units) are present in 4.70 g of each of the following…

A: We have to calculate number of molecules in 4.70g of each compounds.

Q: An organic compound has a molar mass of 171.1 g/mol and contains 11.10 % hydrogen atoms by mass. How…

A:

Q: Elemental analysis of an unknown compound shows it to contain 1.314574 g of hydrogen, 13.466853 g of…

A: Molar Mass of Phosphorus = 30.97 g/mol Molar mass of Hydrogen 1.00 g/mol Molar mass of Oxygen = 32…

Q: Calculate the number of grams of xenon in 4.294g of the compound xenon tetrafouride. Mass of xenon=…

A: We have to calculate the mass of Xe.

Q: How many moles of water, H2OH2O, contain 2.0×10222.0×1022 molecules of water?

A: Mole is the unit of  measurement  for  amount of substance

Q: How many total atoms are in a 0.400 g of P2O5?

A: Given, 0.400 g of P2O5

Q: A philosophy student was counting grains of sand, and found they had 3.7 x 10^24 molecules of SiO2…

A:

Q: How many moles of CaCl2 are in 5.23 x 1024 formula units?

A: No. of formula units of CaCl2 given = 5.23 x 1024

Q: Combustion analysis of 63.8 mg of a C, H, and O containing compound produced 145.0 mg of CO2 and…

A: Empirical formula is the simplest ratio of the elements present in the exact molecular formula.…

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.