n oxide of chromium is made up of 5.20 g chromium and 5.60 oxygen. what is the emphirical formula of the oxide

Q: what is the precent mass of oxalat in (K3Fe(C2O4)3·3H2O, 491.3 g/mol)?

A:

Q: A hydrate of Na2CO3 has an initial mass of 4.31 g before heating and 3.22 g after.      What is the…

A: The initial mass of hydrate of Na2CO3 before heating is = 4.31 g The mass of Na2CO3 after heating is…

Q: Methyl tertiary butyl ether, or MTBE, is currently used as an octane booster in gasoline. It has…

A: The question  is based on the concept of mass percentage. mass percentage is defined as the  mass of…

Q: A tube of Thothpaste contains 0.76 g of sodium monofluorphosphate (Na2PO3F) in 100 mL. a)what mass…

A: Mole is the amount of the substance that contains the same number of particles or atoms or…

Q: 3.135 A certain metal M forms a bromide containing 53.79percent Br by mass. What is the chemical…

A: Let the mass of the compound be 100 g. Then the mass of the Br is 53.79. Calculate the mass of the…

Q: the atomic masses of 10B and 11 B are 10.012938 and 11.009305 amu, respectfully. The average atomic…

A:

Q: 5. How many hydrogen atoms are in 15 g of methane?

A: The answer is explained below.  Given that, the mass of methane = 15 g.  & we know the molar…

Q: An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of…

A: Mass (%) of an element in compound = 100 x Mass of element/Mass of compound Number of moles =…

Q: An experiment requires that enough C,H1206 be used to yield 11.7 g of oxygen. How much C,H1206 must…

A: Given : mass of oxygen, O2 to be yielded = 11.7 g Molar mass of O2 = 32 g/mol Since mass = moles X…

Q: How many atoms of vanadium are in 1.28 grams of vanadium ?

A: 1 mole of vanadium contains Avogadro’s number of atoms. The number of mole of 1.28 g of vanadium…

Q: Consider a sample of calcium carbonate in the form of a cubemeasuring 2.005 in. on each edge. If the…

A: Given: Edge length of the cube(Calcium carbonate) =2.005 inch Density of sample= 2.71 g/cm3 To…

Q: What mass of ammonia gas (NH3) contains 2.8*10^24 hydrogen atoms?

A:

Q: has a molecular formula of C12H2403. What is the empirical formula of d?

A: Answer:  Molecular formula : the actual  whole number of elements in that compound.   Molecular…

Q: 5) Given the molecular formula C6H1004, what is this compound's empirical formula? A) CH2O B) C2H50…

A: Since in the empirical formula, the ratio of atoms are the smallest whole numbers. And since in the…

Q: If you have 9.407 * 10^23 atoms of lead how mant grams of lead (IV) phosphate can you make   How…

A: To determine the moles of Lead present in the given number of atoms, As 6.022×1023 atoms are…

Q: The recommended daily allowance(RDA) of selenium in your diet is 8.87 × 1 0 -4 mol. Howmany atoms of…

A: The number of atoms from the given number of moles can be calculated as the product of number of…

Q: 6. Explain what the coefficient of 4 means in the following chemical formula: 4K,SO,

A: Given that, 4K2SO4

Q: 6. Give the empirical formula for the following compounds: b)_

A: *** As per guidelines I'm solving first question only. Please upload again other questions and write…

Q: A compound is made by carbon, hydrogena and nitrogen and 1 g of this compound contains 91.5 mg of…

A: To write the molecular formula of the compound, the number of moles of each element should be…

Q: h for dellivery from the supplier? Assume that the atomic mass of Ca is 47.0 u.

A:

Q: Use percent composition and molar mass to determine molecular formula. Analysis of a compound of…

A: Given : We have to calculate the molecular formula of the compound.

Q: How many N atoms in a sample of C7H5(NO2)3 that has the same number of O atoms as 13.0 g C6H12O6?

A: Solution stoichiometry is mainly based on the calculation of moles and volumes. These two values are…

Q: A chloride of silicon contains 79.1 mass % Cl. (a) What is theempirical formula of the chloride? (b)…

A: Empirical formula It gives the simplest whole number ratio of elements present in a compound. It is…

Q: An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of…

A: For a compound consisting of two components A and B, mass% of A abd B are related to each other as…

Q: A recently created chromium-boron compound is a component of Ironman’s armor. It was created by…

A: Empirical formula represents the simple ratio of constituent elements in the molecular formula. ex:…

Q: A 0.933 g sample of Nickle metal is heated in the presence of nitrogne gas forming 1.081 grams of a…

A:

Q: Suppose 2.367 g of TiO2 sample evolves 0.143 g O2 , what is the %Ti02 in the sample?

A:

Q: 0.933 g sample of Nickle metal is heated in the presence of nitrogne gas forming 1.081 grams of a…

A: Mass of Sample = 0.933 gMass of Nickel Nitride = 1.081 gmoles of Nickel in sample = To be determined…

Q: What is the mass of 0.38 moles of Phosphorous?

A: Atomic Mass of Phosphorus=30.973762 g Mass of 1 mole = 30.973762 g  Mass of 0.38mole of Phosphorus =…

Q: The compound benzene contains 92.26% C, the remain is hydrogen and has molar mass of 78 g/mol. what…

A: Given    C = 92.26 %    H   = (100 - 92.26) %         = 7.74 %  Molar mass of Compound = 78…

Q: What is the percent of N in N2H4?

A: Molecular weight of N = 14 g/mol Molecular weight of  H = 1 g/mol Molar mass of N2H4 = 32 g/mol…

Q: What is the mass percent oxygen in the molecule NO2?

A: We Know that, Molar mass of NO2 = 46.0 g/mol Molar mass of O2 = 32.0 g/mol

Q: 4. If the manufacturer of Remdesivir has access to 1394 g of phosphorus atoms, how many grams of…

A: The chemical formula of Ramdesivir: C27H35N6O8P. The given mass of phosphorus atoms = 1394 g Atomic…

Q: A compound containing carbon and hydrogen has a molar mass of 56.11 g/mol and an emperical formula…

A:

Q: mass

A: 0.415 mol sample of MnX2O7 has a mass of 85.14 g.  What is X?

Q: A recently created iron-carbon compound is a component of Ironman’s armor. It was created by…

A: Given : Mass of Fe reacted = 5.214 g And mass of compound formed = 6.055 g Assuming the empirical…

Q: What is the average atomic mass of a mystery substance that is 27.5 at a mass of 37g and 72.5% at a…

A: Given: Mass =37 g  Percentage %=27.5 % Mass =38 Percentage % =72.5% Average mass=?

Q: How many atoms of chlorine (CI) are present in 0.072 g of FeCI,? Given that ; Fe= 56 g /mol, Cl=…

A: Given that mass of FeCl = 0.072 g Molar mass of Fe = 56 g/mol, Cl = 35.5 g /mol Hence, molar mass of…

Q: Use percent composition and molar mass to determine molecular formula. Analysis of a compound of…

A: Number of moles is calculated by dividing given mass with molecular mass.

Q: 1. How many ATOM nitrogen trifluoride atoms c

A: Note: According to our guidelines we are supposed to answer only first question

Q: Two binary oxides of the element manganese contain, respectively, 30.40% and 36.81% oxygen by mass.…

A: Empirical formula refers to the formula of a compound in which the elements are present in the…

Q: Narceine is a narcotic in opium that crystallizes from solu-tion as a hydrate that contains 10.8…

A: The value of x in narceine.xH2O is to be determined.

Q: A 0.415 mol sample of MnX2O7 has mass of 85.14g identify X indicating the symbol and not the name of…

A:

Q: Given 500 kg/m3 H2SO4, what are the amounts of H2 and SO4?

A:

Q: 7. A compound contains 30.4 g of nitrogen and 69.6 g of oxygen by mass. What is the chemical formula…

A:

Q: To prevent the presence of air, noble gases are placed over highly reactive to act as inert…

A: The partial pressure of a gas in a mixture of gases is equal to the total pressure multiplied by the…

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

A: Given;

Q: The formula of ytterbium(III) oxide is Yb₂O₃. What is the percent by mass of oxygen in…

A: Mass percent represents the composition of an element in the given compound, which is calculated…

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.