Question 14 A 0.640-kg sample of methylene bromide has a density of 1.38 g/cm ³. Calculate its volume. O 0.000464 cm ³ O 468 cm - 3 O 464 cm O 436 cm 3 3 O 0.464 cm 3

Q: A chemist measures the amount of oxygen gas produced during an experiment. He finds that 6.63 g of…

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Q: Suppose 9.34 g of potassium bromide is dissolved in 100. mL of a 0.50 Maqueous solution of silver…

A: Mass  of KBr = 9.34g Volume of solution = 100 ml = 0.100 L

Q: What mass of ammonia is formed when 5.36 g of nitrogen gas reacts with excess hydrogen gas? Multiple…

A: Given,  5.36 g nitrogen gas is reacted with excess hydrogen.  Thus, N2 is limiting reagent.

Q: 100 90 NANO, 80 70 CaCl, Pb(NO,)2 60 50 40 KCI Naci 30 20 KCIO, 10 Ce,(SO), O 10 20 30 40 50 60 70…

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Q: fill in the missing below -Br 0.5 eq Mg E F

A: It is an example of Wurtz reaction.Equation for the Wurtz reaction: 2 R-X + 2 M --->  R-R + 2 MX…

Q: A chemist adds 110.0 mL of a 1.78 M nickel(II) chloride (NiCl2) solution to a reaction flask.…

A: Molarity of the solution can be calculated by using Following formula - Molarity = mass×1000/molar…

Q: Which of the following has more atoms: 3.55 g ef lithium atoms or 19.1 g of nickel atoms?

A: Mass of lithium = 3.58 g Mass of nickel = 19.1 g

Q: 719.03 g 35.00 mL 708.4 mol 0.67 L 2.09476 mol L x 3.95 L H = 0 mL mol mol

A: Rule for significant digits in multiplication and division.The answer should have the same number of…

Q: Co(NO3)2

A: a) First find out the moles of Co(NO3)2 :  moles = ( formula unit / Avogadro number )  Moles = (…

Q: A chemist has two different gasohol mixtures available. One contains 20% alcohol and the other 12%…

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Q: A chemist adds 205.0 mL of a 2.74 mol/L iron (II) bromide (FeBr₂) solution to a reaction flask.…

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Q: Question 8 There are O 129, 129, 129 O 129, 129, 75 O 54, 75, 129 O 54, 54, 75 O 75, 54, 54 O 54,…

A: According to the answering guidelines, I'm posting the solution for the first question. Kindly post…

Q: What is the mass in grams of 4.57 × 10²⁵ molecules of Cl₂? I get the write and but the wrong number…

A: Mole concept: The number of molecules in one mole of chlorine is equal to the Avogadro number. The…

Q: Question 9 A researcher is using 5.43 x1023 molecules of chlorine gas (Cl2) in an experiment. How…

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Q: Select all quantities whose values are exact (contains infinite number of significant figures).…

A: A number that showing perfect exactly value  , it contain infinite number of significant figure.

Q: Calculate the number of oxygen atoms in a 100.0 g sample of vanadium(V) oxide (V,O,). Be sure your…

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Q: Complete each row of the table below by filling in the missing prefix or missing exponent. 1…

A: Complete each row of the table below by filling in the missing prefix or missing exponent.

Q: need

A: First Calculate the mass of Al :  Mass of Al = Density • volume  Mass of Al = 2.70gcm-3 • 13.2cm3…

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

A: The question is based on experimental chemistry.We need  to solve for the given operations.

Q: N 6.02 In N 3.109 log N -0.094

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Q: Question 5

A: Given, Volume of CCl4 = 2.00L Density = 1.60g/mL

Q: How many (NH4)2CO3 formula units are there in 16.9 g of (NH4)2CO3? Enter your answer using the…

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Q: Part B: Percentage of Baking Soda in an Unknown Mixture UNKNOWN # Mass of test tube and beaker…

A: Given that -  Mass of unknown mixture used = 1.40 g  Mass of H2CO3 released = 0.51 g    From the…

Q: Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice,…

A: We know that, Lowest significant digit present in the given questions is also a part of answer means…

Q: What is the mass percent of phosphorus in P5O2?

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Q: b. U.00004042 fng 4.042 x 10-5 mg Which sample of element is heavier? Show appropriate calculations…

A: Given: The moles of N2 = 2 moles. The moles of Fe = 1 mol. The moles of F2  = 1.5 moles.

Q: Aluminium has a density of 2.70 g/cm. How many moles of aluminum are in a 13.2 cm block of the metal…

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Q: A mixture of oil (0.918 g cm–3) and vinegar (1.006 g cm–3) has a total mass of 397.8 g and a total…

A: Step 1:Given, density of oil (doil) = 0.918 g/cm3density of vinegar (dvin) = 1.006 g/cm3 Total…

Q: -23 An oxygen atom has a mass of 2.66 × 10 g and a glass of water has a mass of 0.050 kg. Use this…

A: Given mass of an oxygen atom = 2.66 × 10–23 g  And, mas of the glass water = 0.050 kg

Q: Which of the following numbers has 3 sigfigs? O 0.03 4 5.0 x 106 3.09

A: Option D is correct. ( 3.09 )

Q: Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water…

A: Note : Dear student, since you have posted multiple parts question, we will solve only first three…

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.