How many moles of MgCl2 are present in 45.0 g of MgCl2?

Q: A 58.5 g sample of an unknown compound that contains only carbon, hydrogen and oxygen was analyzed…

A: mass of hydrogen present in the unknown compound is approximately 4.00 gramsExplanation:Step 1:-…

Q: 5. Analysis of 20.0 g of a compound containing only calcium and bromine indicates that 4.00 g of…

A: Given, The mass of a compound is 20.0 grams The mass of the calcium in the compound is 4.00 grams

Q: What is the molar mass of Sodium Sulfide. Na2S?

A: The molar mass of sodium sulfide has to be given.

Q: How many C4H10 molecules are contained in 9.213 g of this compound? How many hydrogen atoms?

A: Formula for calculation of number of molecules is:

Q: How many moles are in 2.56 x 10-4 grams of Fe2O3?

A:

Q: How many moles of O are present in 7.89 g of acetic acid?

A: In  1 mole of acetic acid there are  2 moles of oxygen,              CH3COOH = 12 + 3*1 + 12+ 2*16+…

Q: How many molecules are in 75.8 g of C6H12O6 ?

A:

Q: A sample of nickel silver contains 18.0% nickel by mass. What mass of nickel silver must be melted…

A: Given: Sample of Nickel Silver contains: 18% Nickel by mass.

Q: - Use dimensional analysis to convert 1.75 mol Mg3(PO4)2 to grams of Mg3(PO4)2-

A: Convertion of moles into mass by using below relation Number of moles = mass of compound/ molecular…

Q: What is the mass percentage of O in CO2? Provide an answer to two decimal places.

A: Given,  The mass percentage of O in CO2 is:

Q: How many grams of chlorine are present in 45.0 g of CCl4?

A: Answer:- This question is answered by using the simple concept of calculation of mass of any element…

Q: Calculate the number of grams of sodium in 2.20 g of each sodium-containing food additive.

A: Sodium benzoate NaC7H5O2 Number of moles of a substance can be expressed as: Given mass of sodium…

Q: How many moles are in 8.00 g of SO3?

A: The number of moles of a substance from its given mass may be calculated as:

Q: 3N2 (g) + H2(g) ~> 2NH3(g) is the balanced chemical equation for the synthesis of ammonia. If an…

A: Given balanced chemical equation for the synthesis of ammonia is  3N2 + H2 ----> 2NH3 Starting…

Q: A chemical reaction calls for 0.125 moles of sodium acetate, NaC2H3O2. What mass, in grams, of…

A: The relationship between number of moles (n) and mass of a substance is given by: n=MassMolar…

Q: How many moles of Sodium thiosulfate, Na2S2O3, are present in 31.7 g of Sodium thiosulfate?

A: A numerical problem based on mole concept that is to be accomplished.

Q: What is the mass (in g) of 3.47 moles of Mg(OH)2?

A: Given the moles of Mg(OH)2 = 3.47 mol In order to find mass, we have to calculated the molar mass of…

Q: How many molecules are present in 52 mg of glucose (C6H12O6)?

A:

Q: Complete the table below for calculating the molar mass of the compound phosphorus triiodide. Molar…

A:

Q: A Hydrate of cobalt (II) chhloride has a mass of 165.88 g before heating. After heating, the…

A: Given: The mass of a hydrate of cobalt (II) chloride before heating = 165.88 g The mass of the…

Q: The number of molecules in 1.5x10-3 g of C3H6O

A:

Q: Calculate the number of moles of ethanol present in 243.3 mL of ethanol, CH3CH2OH, which has a…

A: The following relation can be used to calculate the moles of ethanol : 1- Density = mass/volume 2-…

Q: Write the balanced chemical equation for the reaction of aqueous potassium hydroxide with aqueous…

A: Chemical equation is the representation of a chemical reaction, in which the reactants and products…

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.