39. Calculate the number of molecules present in each of the following samples. a. 4.75 mmol of phosphine, PH3 b. 4.75 g of phosphine, PH3 c. 1.25 x 10 2 g of lead(II) acetate, Pb(CH3 CO2)2

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Q: Calculate the number of Hions in 8.14 g of SrH₂. Hrdions Enter your answer in scientific notation.…

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Q: fragrance manufacturers to provide a rich and elegant musky essence to many perfumes. Cosmone has…

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Q: If you have 42.5 moles of glucose (C6H₁206) approximately how many grams do you have? #3

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Q: A balanced chemical equation contains the term "2Ba(OH)2 8H2O." How many atoms of each element does…

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Q: Balance each equation. a. Ni( s) + HCl( aq) NiCl 2( aq) + H 2( g) b. CH 4( g) + Cl 2( g) CCl 4( g) +…

A: Since you are posted with multiple sub-parts. As per the rule, I am answering the first three…

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

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Q: Calculate the molar mass. a. Co(NO3)2 x 6H2O b. Ni(NO3)2 x 6H2O

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Q: Use the following data and steps below to calculate the formula of the copper chloride hydrate.…

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Q: A sample of Water, H2O, has a mass of 55 grams. Determine the number of moles in the sample.

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

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Q: atter.) 115 g of methane is reacted with an equal mass of sulfur.

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Q: a. Write the balanced chemical equation for the diagram above b. If you have 0.031 moles of…

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Q: 1. 84 g of CsH&O6 contains 6.02 x 1023 molecules.

A: Molar mass of C5H8O6 = 5×12 + 8×1+ 6 × 16 = 164 g 1 mol of any substance contains= 6.022×1023…

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Q: D. Calculate the mass (g) of the following samples. 25) 238 moles of lead 26) 1.54 x 10° moles of Zn…

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Q: 32. Find the mass of oxygen present in 1.50 mole of sucrose (C12H22011). a. 195 g b. 200 g c. 245 g…

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Q: A student reported the following composition of an unknown mixture: 25% NH4Cl, 30% NaCl, and 50%…

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

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Q: The semi-precious stone turquoise is a hydrate and with the chemical formula CuAl₆(PO₄)₄(OH)₈･4 H₂O.…

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Q: 150. g of carbon tetrachloride reacts with 100. g antimony (III) fluoride to produce…

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Q: 6. Calculate the mass of 4.50 moles of CazPO4 . O 968 g O 215 g O 0.0209 g O 87.1 g 7. The molecular…

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Q: What number of molecules (or formula units) are present in 1.80 g of each of the following…

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Q: 2. Calculate number of molecules in 2.33 g CH6. molar masses: C = 12.01 g/ mole and H = 1.008 g/…

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Q: Calculate the percent composition by mass of calcium sulfite, CaSO3 2. Calculate the percent…

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Q: 16. A metal has the mass of 12.00 g and 5.850 x 1022 atoms. Calculate molar mass of the metal. O…

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Q: An air conditioner compressor contains pure CClF3, also known as the refrigerant R-13. CClF3 has a…

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Q: 4. Bismuth (II) Nitrate a. Calculate it's molar mass b. 84.56 g Bismuth (II) Nitrate = mols Bismuth…

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Q: Arrange the following substances in order of increasing mass percent of carbon.a. caffeine.…

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

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Q: 24. Calculate the following: a. The number of moles of oxygen atoms in 4.35 × 1026 molecules of CO2…

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Q: a. How many ATOMS of boron are present in 5.24 grams of boron trifluoride? atoms of boron. b. How…

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Q: 1. In a certain compound of copper and oxygen, CuxOy, we find that a sample weighing 0.6349 g…

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Q: Determine the amount in moles of xenon tetrafluoride, XeF4(s), in 22 mg.

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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.