An unknown compound contains nickel, phosphorus, and oxygen. When analyzed, a 100.0 g sample was found to contain 18.54% P and 28.74% O. How many nickel atoms are present in the empirical formula? [MM (Ni) - 58.70 g/mol; MM (P) – 30.97 g/mol; MM (0) - 16.00 g/mol) 1 2 O 3 O 6 07 O8

Q: If the sample has a molar mass of 176.0 g/mol, what is the molecular formula of the sample?

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Q: A substance contains C, H and S only. Combustion analysis of a 182.9 mg sample of this substance…

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Q: Fructose is a very sweet natural sugar that is present in honey, fruits, and fruit juices. It has a…

A: Given that, %C= 40% %H=6.7% %O=53.3% Molar mass of Fructose=180.1 g mol-1 Then,

Q: An unknown compound contains nickel, phosphorus, and oxygen. When analyzed, a 100.0 g sample was…

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Q: 1) How many sodium atoms are there in 0.3 moles of Na atoms? 2) A sample of carbon dioxide is made…

A: 1) given, Number of moles of Na atoms = 0.3 moles Number of sodium atoms = ?

Q: An unknown compound contains nickel, phosphorus, and oxygen. When analyzed, a 100.0 g sample was…

A: Molecular formula is defined as sum of masses of atoms in molecules.

Q: A particular protein sample is found to have 1 atom of iron in its chemical formula. If the mass…

A: Number of iron atom = 1 Mass percent of  Fe in the compound = 0.330 %

Q: A particular compound is comprised only of the elements C, H, N, and Cl. Combustion analysis of…

A: Given that: Total mass of sample = 14.30 g Mass of CO2 = 31.22 g Mass of H2O = 6.764 g Mass % of N=…

Q: Compound Y contains lead and oxygen only. 15.0 g of Y was found to contain 12.99 g lead. Find out…

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Q: 0.93 g sample of NaCr(SO4)2.XH20 was heated in a crucible to get a constant mass. If the mass of the…

A: Molar mass of NaCr(SO4)2.xH2O = 0.93 g = AMass of NaCr(SO4)2= 0.70g = BMolar mass ofNaCr(SO4)2 =…

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

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Q: What is the molar mass of MgSO4 ● 7 H2O ? H=1.01 O = 16.00 Mg = 24.31 S=32.07

A: Given, molar mass of MgSO4 ● 7 H2O  = ? Note: The molar mass of different atoms are, H = 1.01 g/mol…

Q: An Organic compound contains 59.00% by mass C, 7.15% by mass H, 7.65% by mass N, and 26.20% by mass…

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Q: An unknown compound contains only carbon, hydrogen, and oxygen. Using combustion analysis, you…

A: Here we are required to find the empirical formula of the compound.

Q: Which formula shows the correct way to calculate the molar mass of the compound - Magnesium…

A: Molar mass of a compound is the mass of 1 mol of compound . Molar mass of a compound can be…

Q: One of the sodium oxoacid salts of chlorine (there are 4 salts, each containing Na, Cl, and O) was…

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Q: A 5.91 g unknown sample analyzed by elemental analysis revealed a composition of 37.51 % C. In…

A: Given A 5.91 g unknown sample analyzed by elemental analysis revealed a composition of 37.51 % C. In…

Q: - Why do we use the "mole" in chemistry. How does it relate to the periodic table? a) What is the…

A: The relationship between mole and mass is as follows:       Mole = Mass Molar mass ⇒Mass =…

Q: Consider the following reaction of K2S2O3 for neutralizing chlorine in industrial bleaching. K2S2O3…

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Q: The formula for dinitrogen monoxide is N2O. If a sample of the oxide was found to contain 0.0800 g…

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Q: 1 How many are the oxygen atoms in 111 g of Ca(OH)2? (Atomic mass of Ca = 40)

A: Given 111g of Ca(OH)2

Q: A compound containing chromium, Cr; chlorine, Cl; and oxygen, O, is analyzed and found to be 33.6%…

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Q: One mole of water contains 6.022 × 1023 hydrogen atoms

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Q: The percent compositionn compound is 76.0% C, 12.8% H, and 11.2% O. The molar mass of this compound…

A: Answer = The correct option is(d)  C18H36O2 Solution - According to the question - Given - Ratio of…

Q: Starting with the following equation, Pb(NO3)2(aq) + K3PO4(aq) → Pb3(PO4)2(s) + KNO3(aq) calculate…

A: The given question related to calculation of moles of lead nitrate required to produce for 415 grams…

Q: An aluminum-containing compound has the formula Mg, Al,0, and is 44.98% oxygen by mass. What is the…

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Q: How many moles of H20 can be formed from 6.62 x 10 atoms of NH3 from the following equation? 4 NH,…

A: One mole of any chemical substance contains Avogadro’s number or Avogadro’s constant of atoms in it.…

Q: 4. YOU HAVE 15 GRAMS OF NazSO4. CALCULATE THE NUMBER OF CATIONS IN THIS MASS. GIVEN: MOLAR MASS (…

A: Given compound Na2SO4 and this compound dissociates into cation and anion as  Na2SO4 ⇌2Na+ + SO4-2…

Q: 2) The molecular formula of allicin, the compound responsible for the characteristic smell of…

A: The molecular formula of allicin is C6H10OS2.

Q: 0.93 g sample of NaCr(SO4)2.XH20 was heated in a crucible to get a constant mass. If the mass of the…

A: In this question, we want to determine the value of x in the given Compound. How we will determine,…

Q: What is the molecular formula of a compound if the empirical formula is C,H, and the approximate…

A: Molecular formula: In a molecular formula we describe the number of atoms of all the elements…

Q: A 20.77 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis…

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Q: One term in a balanced chemical equation contained the coeffi cient 3 in front of the formula Al…

A: The subscripts in the molecular formula represent the number of atoms of each type present in the…

Q: A 27.129 mg sample of a chemical known to contain only carbon, hydrogen, sulfur, and oxygen is put…

A: Answer: Empirical formula is the formula containing all the atoms present in the compound in their…

Q: If 1.000 g of tin metal reacts with 0.480 g of fluorine gas, what is the empirical formula of the…

A: No of moles of tin(Sn) =mass of tin(Sn) /molar mass of tin(Sn) =1/118.72 mol of Sn =0.0084232 mol of…

Q: s 7.86 g CO2 and 2.14 g H20. Calculate the empirical formula and molecular ula of acid given that…

A: Mass of acid = 5.24 g Mass of CO2 = 7.86 g Mass of H2O = 2.14 g

Q: Sodium is an alkaline metal which is very reactive and so is not found free in nature. Sodium forms…

A: We have to calculate  the mass percent composition of each element in NaF, NaCl, NaBr, and Nal

Q: How many moles of HCl are in 30.6 g HCl? Express your answer in millimoles. (atomic weights: H=1.01;…

A: • Thus, 839 millimoles of HCl are in 30.6 g HCl in correct number of significant figures.

Q: In a reaction involving manganese, Mn and sulfur, S it was determined that 0.549 g of manganese…

A: First we convert the mass sulfur and manganese to Moles. By this moles of Mn & S  , we have to…

Q: Write the empirical formula for at least four ionic compounds that could be formed from the…

A: Write the empirical formula for at least four ionic compounds that could be formed from the…

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.