Consider a sample of calcium carbonate in the form of a cube measuring 2.605 in.in. on each edge. If the sample has a density of 2.73 g/cm3g/cm3 , how many oxygen atoms does it contain?

Q: Folic Acid (C19 H19 N7 O6), also known as vitamin B9 is used to treat anemia caused by folic acid…

A: a) The number of moles of Vitamin B9 can be calculated as given below. Therefore, the number of…

Q: Calculate the formula units of K2Cr2O7 in 130 g of K2Cr2O7. How many O atoms are in this sample? If…

A: The representation in which the individual atoms of the compound are present in the lowest whole…

Q: How many sulphur atoms are contained in 30 g of Al2(S04)3 (Molar mass: 342.15 g/mol) ? OA 5.78 x…

A: Applying no. of moles  n= w/M  NA= 6.022E+23

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g) to an aqueous solution…

A: Number of moles of I2 is determined as follows, Molar mass of NaI is 253.8 g/mol 2 moles of NaI…

Q: 1) How many zinc (Zn) atoms are contained in 5.16 moles of Zn?

A: Mole is described as the amount of a substance which consist of  exactly the Avogadro number of…

Q: A sample of the compound shown below contains 5.22 g of nitrogen. How many grams of oxygen does it…

A:

Q: What is the average mass (in amu) of:a. Hg b. Kr c. Mg

A: The average atomic mass of an element is the average weight of all the isotopes of that element,…

Q: a. Determine the molar mass of potassium phosphate and ammonium phosphate. K3PO4 (NH4);PO4 b.…

A: The objective of the question is to determine the molar mass and mass percentage of phosphorus.

Q: 26. a. Calculate the the molecular weight of Na2SO4 Atom Number of atoms Atomic Mass Total mass…

A:

Q: What is the theoretical yield of SO3 produced by 2.14 g of S? Express your answer numerically in…

A: We have to calculate the theoretical yield of SO3.

Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g)Cl2(g) to an aqueous…

A: The mass of the substance can be calculated if the molar mass and moles of that substance are known.…

Q: A: What is the correct chemical formula when Co4+ combines with S2- ?  B:  How many ATOMS of OXYGEN…

A: A: What is the correct chemical formula when Co4+ combines with S2-?

Q: Suppose that a device is using a 10.0-mg sample of silicon that is doped with 1 x 10-5% (by mass)…

A:

Q: What is the mass of O in a sample of 70.09g of CO2?

A: Two or more elements are combined to form a chemical compound. Here C and O combine to form CO2…

Q: What is the percent by mass N in Magnesium Nitrate?

A: Atomic mass of N =  14 g mol-1 Molar mass of Magnesium Nitrate (Mg(NO3)2) = 148.3 g mol-1

Q: What mass, in grams, of NO2 is needed to form 140.4 g of NO? Assume excess water.    3NO2(g) +…

A: The reaction given is  3 NO2(g) + H2O(l)  →  2 HNO3(aq) + NO(g) Given : mass of NO forming = 140.4 g…

Q: What is the maximum amount of grams of Fe that can be produced from 33.4 g of iron(iii) oxide mixed…

A: Interpretation: The maximum amount of grams of Fe that can be produced from 33.4 g of iron(iii)…

Q: 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g) What is the maximum mass of water that can be produced…

A: Number of moles of each reactant is calculated.

Q: Consider the balanced reaction of magnesium and oxygen. 2 Mg + O2 2 MgO What mass, in grams, of MgO…

A: The given chemical reaction between magnesium and oxygen isas follows,  2Mg +O2 →2MgOamount of Mg…

Q: If a sample of ammonium sulfate weighs 4.23 g. How many ammonium ions are in that sample?

A: 1 mole = 6.022×1023 [Avogadro's number]  Molar mass :-  The mass of one mole of molecules of a…

Q: Consider a sample of calcium carbonate, CaCO3 (100.09 g/mol), in the form of a cube measuring 2.88.…

A: The length of the cube of calcium carbonate, CaCO3 =2.88 cm The density of the calcium carbonate,…

Q: How many grams of NH,NO3 are required to produce 33.0 g N2O?

A: Given :- mass of N2O produced = 33.0 g  To calculate : mass of NH4NO3 required    Number of moles =…

Q: The semi-precious stone turquoise is a hydrate and with the chemical formula CuAlg(P04)4(OH)8 ·4…

A:

Q: How many grams of water could be made from 5.19 mol H2 and 3.86 mol O2?

A: Since you have posted more than one question,we can solve only first question for you. If you want…

Q: A sample of rubbing alcohol solution contains ethanol, C2H5OH(l). If the sample contains 1.25 × 1023…

A: Given;

Q: What is the mole ratio of Hydrogen (H2) to Ammonia (NH3) in this balanced equation? N2(g) + 3H2(g)…

A: N2(g) + 3H2(g) -> 2NH3(g)

Q: An experiment requires that enough PNCl2 be used to yield 10.3 g of chlorine. How much PNCl2 must be…

A: Answer: 16.84 g

Q: If nickel(II) formate is heated to 300 °C in the absence of air for 30 minutes, the salt decomposes…

A:

Q: In the laboratory, a student weighs out 0.0852 g of cobalt on balance. How many atoms of cobalt…

A: Molar mass of an element represents the mass of one mole of the element.

Q: What is the mass (in g) of 9.87 x 1022 atoms of magnesium? The molar mass of Mg is 24.305 g/mol.…

A: Given, 9.87*1022 Mg atoms

Q: . Aluminum metal is produced by passing an electric current through a solution of aluminum oxide…

A:

Q: How many moles of CCL4 are present in 7.65 X 1045 molecules of the compound? W mass of this amount…

A: Given: The number of molecules of CCl4 is 7.65×1045. The number of moles and mass of CCl4 is to be…

Q: A 0.500 g sample of tin foil reacted with oxygen to give 0.635 g of product. (a) What is the…

A:

Q: An acid, HEl, is formed from a hypothetical element, El, and a subsequent aqueous solution is…

A:

Q: A student, Ken, is given a mixture containing two carbonate compounds. The mixture includes MgCO,…

A: Given: Percent by mass of CO32- ions in sample = 69.14 %

Q: The density of phosphoric acid (H3PO4) is 1.885 g/cm². How many moles are present in 0.245 L of…

A: NOTE : The units of density will be g/cm3 and not g/cm2. Given : Density of H3PO4 = 1.885 g/cm3 =…

Q: How many grams of oxygen does it contain? What is the percentage by mass of nitrogen in the…

A:

Q: How many grams of sodium oxide (Na2O) are produced from 3.55 g of Na?

A: The reaction for the formation of sodium oxide can be expressed as,                         2 Na + O…

Q: An impure sample of table salt (NaCl) that was dissolved in water and treated with silver nitrate to…

A: Mass of the impure sample = 1.741 g  Mass of AgCl formed = 4.084 g

Q: Calculate the maximum yield of sodium sulfate in grams: Mass = g Na,SO4

A:

Q: Phosgene, a substance used in poisonous gas warfare during World War I, is so named because it was…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: An acid, HEl, is formed from a hypothetical element, El, and a subsequent aqueous solution is…

A: The number of moles of compound is given by the expression: Number of moles=Given mass of…

Q: Which one of the following is not equivalent to one mol of the substance? O 65.39 g Zn O 55.85 g Fe…

A:

Q: Calculate the number of SS atoms in 0.700 molemole of SS.

A: Given information:It is assumed that S represents Sulfur. Mole of S is 0.700 mol.

Q: Suppose a student starts with 2.4185 g of a sand mixture and separates the components into 1.3012 g…

A: Mass percent of a component in the mixture can be calculated as the ratio of mass of component to…

Q: An acid, HEl, is formed from a hypothetical element, El, and a subsequent aqueous solution is…

A: Given, Mass percentage of acid, HEI = 20.09%  Atomic Mass: H: 1.00784 g/mol O: 15.999 g/mol El:…

Q: What is the maximum mass of ammonia that can be produced from a mixture of 1.40 x 10' g N, and 4.60…

A: Given data, According to the stoichiometry, One mole ( 28.014 g ) of nitrogen will react with three…

Q: If mass of SO2 is 24g , calculate: 1.1. the molar mass of SO2 The number of mole of SO2 The number…

A: Given.  Mass of SO2 = 24 g  Molar mass of SO2 = To be determined  Atomic wt. Of Sulphur = 32.065…

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.