How many atoms Na are in 1.4 g of Na?     a. 3.7 x 1022 atoms Na   b. 1.0 x 10 -25 atoms Na   c. 1.9 x 1025 atoms Na   d. 8.4 x 1023 atoms Na How many liters of a 1.28 M NaCl can be prepared from 28.0 g of NaCl?     a. 21.9 L   b. 0.613 L                     c. 35.8 L   d. 2.67 L                      e. 0.374 L

Q: What is the mass of one-half mole of SO2? a. 8 g b. 12 g c. 24 g d. 32 g How many grams are there in…

A: (15) The mass and moles of the substance are related to each other as;         Moles =MassMolar mass…

Q: What is the mass in grams of 0.699 moles of glucose, C6H12O6 ? A. 0.00388 g B. 67.1 g C. 126 g D.…

A: Mole: It is defined as the unit for measurement of the amount of substance in the International…

Q: rtobstodafo I nominoq В. Determination of NaCl 86.096 1. Mass of evaporating dish #2, watch glass,…

A:

Q: What is the molar mass (in kg/mol) of methane (CH4)? 1 6 H 1.008 12.00 7. 0.01701 kg/mol 0.01564…

A: Molar mass of a substance is basically the sum of total mass of all the atoms to make a mole of that…

Q: How many moles are in 1.88 x 1022 Al atoms? A.) 2.00 moles B.) 0.500 moles C.) 0.312 moles D.)…

A: The number of moles of a substance is given as the mass of the substance upon its molar mass.

Q: One mole of H₂O contains O a.3.0 1023 hydrogen atoms O b. 1.2 1024 hydrogen atoms c. 6.02 1023…

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

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: Convert 32 grams of C₂H₅OH to moles.

A: The given mass of C2H5OH is 32 g. The molar mass of C, H, and O is 12.011 g/mol, 1.008 g/mol, and…

Q: 3. How many grams of oxygen are in 55.5 g of Fe₂O3? A. 16.6 g B. 5.57 g C. 1.86 g D. 15.3 g E. 138 g

A: The mass of the compound is 55.5 g.The chemical formula of the compound is Fe2O3.To find the grams…

Q: How many moles equate to 128 g of CO2? A. 2.91mol B. 15.6mol C. 5.82mol D. 24.6mol

A: Given : Mass of CO2 = 128 g

Q: Sodium phosphate undergoes a double replacement reaction with calcium nitrate.

A: Double replacement reaction is reaction cations or the anions of two ionic compound exchanges there…

Q: Determine the molecular formula of a compound

A:

Q: Find the Mass of 3.65 x10² mole K,SO,?

A: Number of moles of K2SO4 = 3.65 × 10–2 mol  Molar mass of K2SO4 = 174.26 g/mol

Q: How many oxygen atoms are present in 3,0 x 1023 molecules of Ca(NO3)2?   A. 6.0 x 1023   B. 1.5…

A: 1 molecule of Ca(NO3)2 have 6 oxygen atoms as NO3 have 3 oxygens and (NO3)2 will have 3 x 2 = 6…

Q: What is the mass of aluminum oxide (101.96 g/mol) produced from 3.59 g of iron(II) oxide (71.85…

A: Given :-  Unbalanced chemical equation :-  __FeO(l) + __Al(l)  → __Fe(l) + __Al2O3(s)  Amount of FeO…

Q: You have a beaker containing 325.9mL of H2O and 14.55g of CaBr2. Calculate the mass percent.

A: Mass percentage ( % w/W ) :  mass of solute in grams present in 100 mL of solution is called mass…

Q: An unknown compound comprised of osmium and chlorine is 40.11% osmium by mass. a. If you assume…

A: Hello. Since the question contains more than three sub-parts, the first three sub-parts shall be…

Q: Which of the following compounds is/are polar? You may choose one or more compounds. If there are…

A:

Q: Match the correct number of nitrogens with the correct situation that you see below v 2 NH4NO3 A. 4…

A: Count the no. of N' atom by simply multiply by its coefficient.

Q: Magnesium sulfate (M9SO.) O a. 1 O b. 2 О с. 3 O d. 4

A: Magnesium sulfate is an ionic compound. An ionic compound is made of cation and an anion. Here,…

Q: An experiment was performed in lab to produce 10.3 grams of Ca(OH)2, however the calculations…

A:

Q: 4.0 g of oxygen contains   A. 0.025 molar masses   B. 4.0 molar masses of oxygen   C. .02 x…

A: Here there is Oxygen atom so atomic mass is 16 g mol-1.

Q: What are the values for % Cl and % F, respectively, for Sample II?A. 0.622 and 61.65 C. 38.35 and…

A: Mass percent of a compound is equal to the mass of component divided by the total mass of all the…

Q: How many 500mg tablets of erythromycin are required to prepare 240 mL of a solution of erythromycin…

A:

Q: How many grams of Mo2(SO3)3 are in 1.34x1023 molecules of Mo2(SO3)3?    a. 4.17x104 grams b. 432.13…

A:

Q: 5. Magnesium Phosphate a. Calculate it's molar masS b. 183.58g of Magnesium Phosphate = mols…

A: Number of moles is the ratio of given mass of the substance to the molecular mass of the substance.

Q: What is the molar mass of calcnum chloride hexahydrate! a 75.53 g'mol, b.111.0 gmol c 1170 gmol d.…

A: The answer to the following Question is:

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.