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?

Q: -X2X X+B-C. a) Assuming that both A and B àre kept at constant concentrations a and b, show that the…

A:

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

A:

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

A: Given:Number of bread slices = 36 slicesNumber of cheese slices = 45 slices1 sandwich = 2 slices of…

Q: Product X has a theoretical yield of 4.8 g. Isolated product X was placed in a plastic sample tray.…

A: Yield is the amount of product formed in a reaction. Theoretical yield is the amount of desired…

Q: when a mixture of solid Na2CO3 and NaHCO3 is heated, only NaHCO3 decomposes. The products of this…

A: A numerical problem to find the percentage by mass of NaHCO3, when it is present in a mixture with…

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

A:

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) ✈…

A:

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…

Q: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

A:

Q: percent yield

A:

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

A:

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

A: Given reaction :  C3H8 + 5O2 ==>

Q: A mixture contains NaHCO3 together with unreactive components. A 1.56g sample of the mixture reacts…

A:

Q: amount of nickel(III) oxide

A:

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

A: The question is based on the concept of pH of the solution.  it is defined as a negative logarithm…

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

A: Given, The detonation of nitroglycerin: 4C3H5N3O9(l) → 12CO2(g) + 6N2(g) + O2(g) + 10H2O(g) Note:…

Q: A local water retention pond was found to have elevated mass concentration of mercury of 14 ng per…

A: Given data: Concentration of mercury = 14 ng/L Volume of water in swimming pool = 1250 m3   Known…

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

Q: Use the solubility generalizations on the information page to predict if one or more precipitates…

A:

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

A:

Q: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

A: Given: When morphine undergoes combustion, carbon dioxide is produced. Mass of mixture            =…

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

A:

Q: Some chemical reactants are listed in the table below. Complete the table by filling in the…

A: Oxidation number represents the number of electrons lost or gain by the atom to get stable…

Q: SIC1₂ vapor. proofed by coating it with a silicone layer. This is done by exposing the cloth to…

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…

A: Given:

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

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…

A: A chemical reaction in which the reactant molecule that has a lesser number of moles, according to…

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

A: Given unbalanced equation are

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

A: The balanced chemical reaction is the chemical reaction in which the elements present in the…

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.