Calculate the number of moles in each sample. Express your answer with the appropriate units. 71.5 g HCCl3 10.7 g C6H12O6 21.6 kg C2H2 22.5 g of nitrogen dioxide

Q: rgahic compound has a gram molecular weight of 372 g/mol, and its composition is 38.6% carbon, 9.76%…

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Q: Which one is a FALSE statement? O The chemical formula CuBr2 indicates that this compound is…

A: We have to predict the false statement.

Q: A particular ore of lead, galena, is 10.0% lead sulfide, PbS, and 90.0% impurities by weight. What…

A: we  need to calculate mass of Pb in the ore

Q: Which of the following would contain the highest number of atoms?

A: Number of moles = mass/molar mass.  1 mol contains 6.022 × 1023 atoms

Q: See pic below

A: Given, Mass of methane = 3.20g

Q: You have 28.83 liters of oleic acid. Find the number of molecules in this sample. Oleic acid has a…

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Q: A chemist decomposes samples of several compounds; the masses of their constituent elements are…

A: In order to calculate the empirical formula of each compound , we first need to convert the grams of…

Q: Find the mass (in grams) 7.7 X 10 molecules of NO,

A: Given :-  Number of molecules of NO2 = 7.7 x 1023 molecules  To calculate :- mass of NO2 in grams

Q: What mass (in kg) does 4.41 moles of copper have?     0.784 kg     0.444 kg     0.280 kg…

A: Given -  No of moles =4.41 moles  Molecular mass of  copper (M) = 63.546  g / mol No of moles = 4.41…

Q: 4A1+30₂ -> 2Al₂O3 Given 6 moles of aluminum (Al), how many grams of aluminum oxide (Al2O3) will be…

A: The formula to calculate the number of moles is: Number of moles of a substance=Amount of…

Q: Calculate the moles of glucose in 1.0253 g of glucose, C6H12O6. Then calculate the moles of each…

A: Given :-  Mass of glucose = 1.0253 g  To calculate :-  Number of moles of glucose and also determine…

Q: What is the elemental composition of mercury(I) nitrate, Hg2(NO3)2? Report the mass percent of each…

A: Answer:- This question is answered by using the simple concept of calculation of percent of each…

Q: Calculate the molar masses of the following molecules. Include the units. Use 4 significant figures.…

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Q: What mass of chlorine is contained in 80.3 g of ZnCl2?

A: %w/w = (mass of chlorine in ZnCl2/mass of ZnCl2) × 100

Q: Determine the moles of barium in each sample. Be sure each of your answer entries has the correct…

A: Part 1) 731. g Ba:To find the number of moles of barium, we'll divide the given mass by the molar…

Q: Sucrose has the molecular formula C12H22011. If a sucrose sample contains 9.0 x 1024 atoms of…

A: Given, Sucrose has the molecular formula: C12H22O11 A sucrose sample contains, Number of atoms of…

Q: How many molecules are there in 39 grams of oxygen? 39.0 g O, x =? molecules O2 32.00 g 02=1 mol O2…

A: Applying formula of moles  n=w/m  No of molecules=n×NA

Q: How many grams do 3.47 x 1023  formula units of Sr(ClO4)2 weigh?

A: The question is based on mole concept. We have been given formula units of solute. we have to…

Q: How many molecules are in each sample? 69.0 g N2 (Express your answer using three significant…

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

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: Determination of Hydrate Formula: barium chloride hydrate  Data:…

A: While heating the hydrate BaCl2.nH2O, the water in it escapes as water vapor. The amount of salt…

Q: A 0.720 mol of Ca3(PO4)2 sample weighs how much in milligrams? What is the mass in grams of…

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Q: Convert 1.61 × 1024 atoms of carbon to moles of carbon.

A: Answer:Each mole of a substance has number of particles equal to Avogadro number whose value is…

Q: What is the mass percent of silicon dioxide (SiO2) if you are able to separate 2.202g out of a…

A: The mass percentage of a compound in a mixture is equal to the ratio of the mass of that compound…

Q: A chemical reaction was used to produce 1.61 moles of copper (II) bicarbonate, Cu(HCO3)2. What mass…

A: Given data:

Q: osmium by mass. a) If you assume 100.0 g of the compound, what is the mass in grams of osmium that…

A: Since you have posted a question with multiple sub- parts, we will solve first three sub- parts for…

Q: You can also calculate percent composition from a formula. This is similar to percent abundance in…

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Q: Titanium(IV) oxide is one of the best sunscreens because it completely blocks ultraviolet radiation…

A: mass of Ti = 23.5 gatomic mass of Ti = 47.87 g/molmolar mass of TiO2 = 79.87 g/mol

Q: The black powder used to propel a firework into the sky is made up of 64% by mass potassium nitrate…

A: Number of atoms, ions and molecules present on a given amount can be determined by “Mole Concept”.…

Q: A newly found compound was discovered to contain 4 iron atoms. If the molar mass of this compound is…

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Q: Tartaric acid is the white, powdery substance that coats sour candies such as Sour Patch Kids.…

A: To solve this problem first we find the mass of C , H and O  Then the number of mole of each to get…

Q: A molecule contains 16.623% hydrogen, 2.078% oxygen, and no other element except carbon. What is the…

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Q: How many calcium atoms are in 1 g of CaO? O 9.553 x 10-23 O 7.201 x 1023 O 1.074 x 1022 O 1.422 x…

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Q: From the given molar mass and empirical formula of several compounds, find the molecular formula of…

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Q: O 4.29 x 10 10 g What is the mass of 4.63 x 1012 atoms of Fe? O 1.08 x 10 10g O 9.76 x 10 10 4.29 x…

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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.