Calcium (ca), the fifth most-abundant element on Earth, is always found combined with other elements because of its high reactivity. How many moles of calcium are in 252 g sample of Ca? O 10100 mol Ca O 40. 08 mol Ca O 6. 29 mol Ca 6. 02 x 1023 mol Ca

Q: 15)An unknown compound is composed of 25.24% by mass of sulfur and 74.76% by mass of fluorine. If…

A: Molar mass of compound given= 254.11 g/mol  Let mass of the compound in grams= 100g  Then  mass of…

Q: The molar mass of NBr3 is (2.22 x 10² mol Br₂)(- mol NBr3 g mol NBr3 -) = mol Br₂ g NBr3 mol NBr3 g…

A:

Q: 13. How many oxygen atoms are in 225 g of O2? a. 4.23 x 1024 b. 6.84 x 1024 c. 8.47 x 1024 d. 1.69 x…

A: Number of Atoms of Oxygen can be calculated as -

Q: A sample of sulfolane, C.H3O,S, contains 5.00 x 1024 atoms. How many moles of sulfolane are in the…

A:

Q: Samples of several compounds are decomposed, and the masses of their constituent elements are…

A: The empirical formula of each compound has to be given. (a) Given data contains, Mass of Ba=2.677 g…

Q: 6)An unknown compound is composed of 25.24% by mass of sulfur and 74.76% by mass of fluorine. If the…

A: Given:  Molar mass of compound= 254.11 g/mol  Mass % of sulfur= 25.24 %  Mass% of fluorine= 74.76 %

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: Mg(s) + 2 HCl(aq) −−−→ MgCl2aq) + H2(g)   given that the mass of magnesium is 0.030 g, find the…

A:

Q: How many moles of atoms are contained in 4.5 x 1022 atoms Cu.

A: The number of atoms of Cu is 4.5×1022. The formula to calculate number of atoms is,

Q: The formula for sulfur hexafluoride is SF. a. How many molecules are in 6.61 grams of sulfur…

A:

Q: The chemical formula of aspirin is C9H8O4. What is the mass of 0.40 mol of aspirin?  A. 72.00 g B.…

A: Number of mole = mass / molar mass

Q: A mole of a compound composed of nitrogen and oxygen (N xO y) has a molecular weight of 92.0 g/mol.…

A: Given,  Empirical formula = NxOy  Molecular weight of NxOy = 92 g/mol

Q: How many moles of silver atoms are there in 1.80 x 104 atoms of silver? O 3.30 x 103 moles O 3.00 x…

A: The given data contains, number of atoms = 1.80×1020.

Q: A molecular compound is found to consist of 26.0% nitrogen and 74.0% oxygen. If the molecule…

A:

Q: Nitrogen dioxide is a component of urban smog that forms from gases in car exhaust. How many…

A: Detail mathematical calculation is shown below

Q: 8

A: Question 8. Given: To Solve: Molar mass of ammonium sulfate=? Solution: Molar mass of N=14Molar…

Q: how many moles are 3.604 x 10^24 molecules of Co(NO3)2

A: Moles is defined for the quantity. Mole is the correct term to define number of atoms ,…

Q: Chalk is mostly made of calcium carbonate, CaCO3. If it took 48.6 g of chalk to write your name on…

A: Option A will be correct.

Q: Morphine (molar mass = 285.37 g/mol) is a narcotic %3D painkiller. How many moles of morphine are…

A: We know that : moles = weight of substance/molecular weight of substance  Or, moles (n) = weight…

Q: How many atoms of hydrogen are in 30 g of NH4NO3 (Molar mass: 80.04 g/mol) ? O A. 2.77 x 1022 O B.…

A: MOLE: The amount of substance present in whole of a compound is known as one mole and it is…

Q: How many grams are there in 4.5 x10 22 molecules of MgBr ,? O 1.47 x 10 44 g 8.28 x 10 24 g 0.075 g…

A: Given  molecules of MgBr2 = 4.5 x 1022 molar mass of MgBr2 = 184.113 g/mol   Conversion factor -…

Q: How many individual formaldehyde (CH20 = 30.03 g/mol) are found in a 32.0 mL sample %3D of gaseous…

A: Data given, Volume of formaldehyde = 32.0 mL The density of formaldehyde = 0.815 g/mL Molar mass of…

Q: How many moles of carbon atoms are there in 5g of carbon? 60 mol 17 mol 0.42 mol O 7 mol ООО О

A: Moles= gram mass/ atomic mass Atomic mass of carbon= 12 So,  moles of carbon = 5/12= 0.416moles

Q: The molar mass of Fluorine (F) is 19.0 g/mol. Calculate the molar mass of F2. O 6.31 x 10-23 g/mol…

A: Molar mass of a compound is the sum of individual elements multiplied by their molar masses.

Q: How many aluminum atoms are in 3.78 g of aluminum?

A:

Q: How many atoms are in 4.81 mol of cobalt? 4.81 mol = %3D How many moles are in 5.90 x 1024 atoms of…

A:

Q: NH3 + O2 → NO + H2O For every 150 g NH3,   Find the mass of NO produced. _________ Find the mass…

A: Given, mass of NH3 = 150 g  Molar Mass of :: N: 14.01 g/molO: 16 g/molH: 1.01 g/mol

Q: The mass of 4.75 moles of H2SO4 is O 314 g O 456 g O 466 g O 564 g

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: 8. Acetic acid, the acid present in vinegar, has the empirical formula of CH20. If the Molar mass of…

A:

Q: How many hydrogen atoms are contained in 3.64 g of PtCl2(NH3)2? O4.90 x 1022 O9.79 x 1022 О4.38 х…

A: Molar mass of PtCl2(NH3)2 is given by  Molar mass = Atomic mass of Pt + Atomic mass of Cl X 2 +…

Q: How many moles of ammonia contain 1.51 x 1024 NH3 molecules? A) 2.51 mol B) 0.399 mol C) 0.251 mol…

A: Number of moles = Number of molecules/6.0224 x 1023 Number of moles = Mass/molar mass

Q: Suppose you have two samples that are equal in weight, 34.8 g Ag and 34.8 g Fe,O,. Calculate the…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: Iron is biologically important in the transport of oxygen by red blood cells from the lungs to the…

A: Given :-  Mass of Iron present in 2.64 × 1013 red blood cells = 2.90 g  To be calculated :-  Number…

Q: Dichlorodifluoromethane (CF2CI2) is an Ozone-depleting substance. It belongs to a class of compounds…

A: Atomic Weight of C = 12.01g/mol Atomic mass of Fluorine = 19.0g/mol Atomic mass of Chlorine =…

Q: How many moles of Cl atoms are there in 65.2 g CHCI3? O 3.3 x 1023 mol O 0.548 mol O 1.64 mol O 1.09…

A:

Q: How many atoms of hydrogen are present in 4.54 g of ammonia? A. 6.64 x 1019 B. 8.20 x 1024 O C. 1.61…

A: We know that , 1 mole of substance contain  = 6.022 × 1023  atoms By using this relation , we can…

Q: How many silicon atoms are present in a sample of 32.8 g of silicon? The molar mass of silicon is…

A: Given : Mass of silicon i.e Si = 32.8 g And molar mass of Si = 28.09 g/mol.

Q: How many grams of Zn are in 0.256 mol Zn? O 16.7 g O 1.67 g O 0.004 g 0.256 g 2.56 g

A:

Q: How many moles of calcium atoms do you have if you have 4.69 x 10 atoms of calcium. (The mass of one…

A: 1 moles of any element contains Avogadro's number of atoms. Avogadro's number is 6.023 x 1023…

Q: What is the mass of 0.0250 mol of P205 ? O 0.0250 g O 35.5 g 5676 g O 3.55 g

A: Given, Moles of P2O5 = 0.0250 mol Molar mass of P2O5 is 141.944 g/mol.

Q: 3. Which sample contains the same number of atoms as 1 gram of He? 6 g of C 7 g of Si 9 g of F 8 g…

A: Mass of He = 1g Molar mass of  He= 4 g mol-1   Mass of C = 6 g Molar mass of  C= 12 g mol-1   Mass…

Q: 4. The mass of silicon atoms is * no. of Si atoms 1.63x102 atom [Avogadro's = O 1.04 x 10 g O 4.58 x…

A: Given,  Number of Si atoms =   1.63 x 1021 atoms  Calculate the mass of Si atoms = ?  Options are :…

Q: A sample of terbium contains 3.01×1025 atoms. What is the total mass of this sample?The molar mass…

A: It is required to calculate the mass of 3.01 x 1025 atoms of terbium and the molar mass is 158.9…

Q: How many moles of calcium atoms do you have if you have 2.46 × 10²¹ atoms of calcium

A:

Q: How many hydrogen atoms are in 3.25 g of acetic acid, CH3COOH(I)? a. 3.26 x 1022 b. 6.74 x 1022 C.…

A:

Q: How many moles are in 184 grams of Ba(OH)2? O a. a. 6.44 x 1023 mol b. 1.07 mol O c. 1.78 x 10 24…

A: The relationship between number of moles and mass of a substance is: Number of moles=Given massMolar…

Q: For many years chloroform (CHC]3) was used as an inhalation anesthetic in spite of the fact that it…

A: The mass percentage of a component in a solution is obtained by using the formula: Mass percent=Mass…

Q: How many atoms of carbon are in 9.0g of C6H1206? 6 1.81 x 1023 O 4.9 x 1023 O 3.01 x 1023

A: In this question, we want to determine the number of carbon atoms in given amount of C6H12O6  You…

Q: A combustion analysis is performed on a compound that contains only C and H. The analysis produces…

A:

Q: The number of oxygen atoms in 20.18 grams of Al(NO3); is: O 1.712 x 1023 O 0.09474 5.135 x 1023 O…

A: molecular mass of Al(NO3)3 = 213g no of atoms in 1 mole Al( NO3)3 = 6.023X1023 X 6 atoms no of moles…

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.