Lead compounds are often highly colored and are toxic to mold, mildew, and bacteria, properties that in the past were useful for paints used before 1960. Today we know lead is very hazardous and it is not used in paint, however, old paint is still a problem. If a certain lead-based paint contains 14.5% PbCr2O7 and 73.9% of the paint evaporates as it dries, what mass of lead (in grams) will be in a paint chip that weighs 0.58 g?

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Q: Aniline, C6H5NH2, is used to make many different chemicals, including dyes, photographic chemicals,…

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A: Write balanced chemical equation of  nitric acid between sodium carbonate 2HNO3 + Na2CO3 → 2NaNo3 +…

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Q: If 10 grams of hydrogen are allowed to react with 100 grams of carbon dioxide... a) What is the…

A: Please see the attached image for the solution.If there are queries, please do not hesitate to ask.…

Q: Concentration of Solutions Children's toys and jewelry were assessed for their contamination by…

A: Solution: Given :                      molecular wt. of As =   74.92 g/mol…

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A: Given reaction,      C2H6 + O2 → CO2 + H2O

Q: 100. grams of C5H12 are burned during an experiment, How many moles of CO2 are released?

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Q: 2012 vapor. The on the cloth to form a waterproofing film (density = 1.0 g/cm³) of [(CH3)2 SiO],…

A: In one process for waterproofing, a fabric is exposed to (CH 3)2SiCl2 vapour. The vapour reacts with…

Q: Which of the following reactions does the chemical equation below best represent? A Cu(OH)₂ (s) ✈…

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Q: are produced When 2.3 moles of diphosphorus pentoxide are decomposed into its elements? 2 P,0, - 4P…

A: Formula of  diphosphorous  pentoxide   = P2O5Atomic weight of Phosphorous = 31g  The above given…

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Q: percent yield

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Q: Suppose a piece of silver jewelry contains 7.78×1022 atomsatoms of silver (AgAg).

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Q: Concentration of Solutions Children's toys and jewelry were assessed for their contamination by…

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Q: what will be the number of moles of CO2 in 88 g of CO2?

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Q: The reactant side of a balanced chemical equation is shown below. C₃Hg +50₂ → How many oxygen atoms…

A: Given reaction :  C3H8 + 5O2 ==>

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Q: amount of nickel(III) oxide

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Q: 20. Sodium nitrite (NaNO₂) is often added to processed meat to enhance color and to protect against…

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Q: Lead compounds are often highly colored and are toxic to mold, mildew, and bacteria, properties that…

A: Given that : % of  in PbCr2O7 in a lead-based paint = 13.6% % of the paint evaporates as it dries =…

Q: 4. The detonation of nitroglycerin proceeds as follows: 4 C3H5N3O9(l) → 12 CO2(g) + 6 N2(g) + O2(g)…

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Q: Lead compounds are often highly colored and are toxic to mold, mildew, and bacteria, properties that…

A: Given, A certain lead-based paint contains 12.9 % PbCr2O7 and 70.4 % of the paint evaporates Mass of…

Q: What was the percentage by mass of Cr in the ore sample?

A: Absorbance A = 1.618Molar absorptivity ε = 2.81 Lmoll = 1 cm

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Q: In an accident, a solution containing 745 grams of nitric acid was spilled. To clean it up 900 grams…

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Q: Balance th

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Q: Balance the following chemical reactions

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Q: Balance the equation below, which uses imaginary elements (they still follow the usual convention –…

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Q: • Show complete solution to get complete credit score. • Observe organized calculation format.…

A: Given : Mass of Mg = 15 g Molarity of HCl = 1.0M

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A: Given as, n(CH3)SiCl 2 +2nOH→2nCl- +nH2O+[(CH 3)2SiO] n ​

Q: (3b-101) Balance the following equations (be sure to first convert any chemical names into…

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A: The limiting reagent refers to the compound that is fully utilized after the completion of chemical…

Q: The concept of determining which reactant is limiting and which is in excess is akin to determining…

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Q: Children's toys and jewelry were assessed for their contarmination by potentially toxic elements…

A: 1 Ppb = 0.000001 mg/g 1 Ppm = 1 mg/L 1 ug = 0.001 mg

Q: 10. Which of the images below represent balanced chemical equations? Write balance chemical…

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Q: Ethane is a gas similar to methane that burns in oxygen to give carbon dioxide gas and steam. The…

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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.