B. Calculate the number of moles contained in each of the following samples. 13) 1.06 x 1025 atoms of nickel 14) 9.47 x 1020 atoms of Ag 15) 5.82 x1035 molecules of NazS

Q: For the following chemical reaction, write 6 different mole to mole ratios. Fe2O3 (s) + 6 HCl (g)…

A: Mole to mole ratios can observe by chemical reaction  Fe2O3:HCl=1:6 Fe2O3:FeCl3=1:2 Fe2O3:H2O=1:3

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: Given :-  Percent composition of Zn = 23.4 %  Percent composition of As = 53.7%  Percent composition…

Q: determine the quantity of molecules in 0.150 molecules in 0.150 moles of H20

A: Given Moles of H2O = 0.15 moles

Q: Complete the table. Element Moles Mass Cr 0.00442 Fe 73.5 mg Ti 1.009 x 10-3 Hg 1.78 kg

A: Mole is represented by the symbol mol. It is unit of measurement of substance. Mass is defined as…

Q: A sample of ammonium phosphite, (NH4)3PO3, contains 0.162 mol of nitrogen atoms. The number of moles…

A: Given , ammonium phosphite  (NH4)3PO3

Q: Determine the empirical and molecular formula for a compound that gives the following percentages…

A: Assuming we have 1 mole of compound Hence mass of compound = 1 X molar mass = 98.96 g Since the mass…

Q: A compound consisting of B, N, and H undergoes elemental analysis. The % composition by mass is…

A: Given,Percent of B in the compound = 40.28 %Percent of N in the compound = 52.20 %Percent of H in…

Q: Suppose you have two samples that are equal in weight, 24.824.8 g VV and 24.824.8 g Cr2O3Cr2O3.…

A: Given, Mass of V = 24.8g. Mass of Cr2O3 = 24.8g.

Q: Determine the number of moles in 4.21 x 1023 molecules of CaCla STARTING AMOUNT

A: Number of moles is basic unit of amount of substance.

Q: 16. A chemist has 2.50 grams of magnesium. How many grams of F2 molecules must a chemist have to…

A: Mass of magnesium = 2.50 g Molar mass of magnesium = 24.305 g/mol Molar mass of F2 = 38.0 g/mol Mass…

Q: A block of pure magnesium metal weighs 76.9 grams. How many moles of magnesium are present in the…

A: Mole= mass of Mg / molar mass of Mg Given - 1) mass of Mg =76.9              2) Molar mass of Mg=…

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: First calculate percentage ratio  of mole then form formula

Q: Calculate the percent by mass of each element in the following compounds. 1). Ag2S 2). NaHSO3 3).…

A: 1) The compound given is Ag2S. Assuming 1 mole of compound Ag2S. Molar mass of Ag2S = Atomic mass of…

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

A: Moar mass of Phosphorus = 30.973762 g/mol  Molar mass of Iodide = 126.90447 g/mol

Q: 31. How many moles of potassium bromide can be produced from the reaction of 2.92 moles of potassium…

A:

Q: When the following chemical equation is balanced, _ K2Cr2O7 + _ BaCl2 + _ H2O → _ BaCrO4 + _ KCl +…

A:

Q: A compound is 80.0% carbon and 20.0% hydrogen by mass. Assume a 100.-g sample of this compound. The…

A: Given, Mass % of C = 80.0 % Mass % of H = 20.0 % Mass of the compound = 100 g Empirical formula of…

Q: Complete the table below for calculating the molar mass of the compound carbon tetrachloride. Molar…

A: The complete table for the molar mass of the compound carbon tetrachloride is given below, 1mole of…

Q: a. Two compounds have the same composition: 92.25% C and 7.75% H. Obtain the empirical formula…

A: Empirical formula is the simplest formula of a compound where atoms of participating elements are…

Q: CO2 has a molar mass of 44 grams per mole. 4.4 grams of CO2 is how many moles? A)  193.6 molecules…

A: mass of CO2 = 4.4 gmolar mass of CO2 = 44 g/molNumber of molecules of CO2 = ?Number of moles of CO2…

Q: Determine the empirical formula of a compound with the following composition by mass: 18.0%C, 2.5%H,…

A: We have to predict the empirical formula.

Q: How many hydrogen atoms are present in 3.2 g of NH3?     a)  0.19 atoms   b)  0.56 atoms   c)…

A: Given that:  Mass of NH3 = 3.2 g  We know molar mass of NH3 = 17/gmol Moles = given mass/molar mass

Q: Convert 0.2377 grams of carbon into moles. 0.01718 molescarbon 0.01181 molescarbon 0.008229…

A: The mass of carbon given = 0.2377 g Molar mass of carbon = 12.0107 g/mol

Q: How many moles (of molecules or formula units) are in each sample? Express your answer in moles to…

A: Given A) 29.2 g NO2 B) 1.35 kg CO2 C) 45.9 g KNO3 D) 164.5 kg Na2SO4 moles (of molecules or formula…

Q: What amount in moles is 4.77x10^25 (to the power of 25) molecules?? 1.2.87x10^49 mol 2.79.2 mol…

A: Molecules = 4.77 x 1025

Q: A chemist weighs 50.0 grams of solid NaOH. a) How many moles of NaOH are in the sample? [ Select ]…

A:

Q: A 1.252-g sample of a hydrate of cobalt(II) chloride (CoCl2∙xH2O) is heated in a crucible, cooled,…

A: Number of moles of cobalt chloride and water is determined as given below:

Q: 2.00 mol of CO2  A) 6.022 x 10^22 molecules B)44.01 g C)3 atoms total

A: The molecule given is CO2 with moles of CO2 = 2 Since 1 molecule of CO2 has  1) 1 atom of C  2) 2…

Q: How many moles are present in each of the following samples? a.) 55.0 g of titanium, Ti  b.) 16.9…

A:

Q: According to the following reaction, how many moles of chlorine gas are necessary to form 0.452…

A:

Q: A compound was found by elemental analysis to contain 39.96 % carbon, 13.42 % hydrogen, and 46.62 %…

A: Molecular formula is the formula of the molecule in which all the atoms are represented with number…

Q: 19) How many sodium ions are contained in 99.6 mg of Na2SO3? The molar mass of Na2SO3 is 126.05…

A:

Q: Calculate the moles of ammonia present in a 7.040 g sample of ammonia, which has a molar mass of…

A: Given, mass of ammonia = 7.040g  Molar mass of ammonia = 17.030gmol-1  Moles of ammonia = ?  Note :…

Q: Complete the table below for calculating the molar mass of the compound sulfur trioxide. S O Molar…

A:

Q: 25. How many particles are present in 8.0 moles of silver? 1.6 · 1024 particles 3.0 · 1023 particles…

A: Given: The number of moles of silver is 8.0 mol. The number of particles present in the "n" number…

Q: Without using a calculator, which has the greater mass: One mole of carbon atoms or one mole of…

A:

Q: Convert 40.0g K3PO4  to molecules of K3PO4 . choose the correct multiple choice underneath. 40.0…

A: Given mass of K3PO4  = 40 g

Q: Question 11 How many moles of carbon are present in 1.37 x 10 25 atoms of carbon? O 8.25 moles O…

A:

Q: 5 g of hydrated barium chloride is heated in a crucible until the mass of the sample no longer…

A: Given: Mass of hydrated barium chloride = 5 g Mass of sample after heating = 4.26 g The loss of mass…

Q: Which of the following is true about finding the molar mass of potassium sulfate, K₂SO4? A. The…

A: The molar mass of a compound can be calculated by adding the standard atomic masses (in g/mol) of…

Q: How many moles of atoms are contained in each of the following? a.) 7.50 x 10^24 I2 Molecules b.)…

A:

Q: A flask contains 0.200 mol of liquid bromine. Br2. Determine the number of bromine molecules present…

A:

Q: rue or False? A molar ratio is a ratio between the number of moles of any two components involved in…

A: The chemical equation depicts the arrangement of the reactants on the left side and the products on…

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.