The green color of leaves is due to thepresence of chlorophyll, C 55 H 72 O 5 N 4 Mg. A fresh leafwas found to have 1.5 × 1 0 -5 mol of chlorophyll percm 2 . How many chlorophyll molecules are in 1 cm 2 ?

Q: 0.279 g of the hydrate CoCl2•nH2O is heated to produce 0.197 g of anhydrous CoCl2 (MM = 129.83…

A: Given: Mass of hydrate = 0.279 g Mass of anhydrous CoCl2 = 0.197 g Molar mass of CoCl2 = 129.83…

Q: A sample of ultrapure silicon was reacted with excess oxidizing yielding SiO₂. After proper…

A: Given that -  Mass of Silicon dioxide SiO2 =  3.1754 g  Percentage of ultrapure silicon = 99.98%…

Q: 3 Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H₂O In the above equation how many moles of water can be made…

A:

Q: An unknown mass of Na3PO4(s) is dissolved in water to form 50.00 mL of solution. This is Solution A…

A: Given: Number of sodium ions = 4.408*1020

Q: A chemist adds 2.00L of a 1.08x10^−4M silver(II) oxide AgO solution to a reaction flask. Calculate…

A:

Q: What is the mass percentage

A:

Q: 50 mL of a 0.9 Ca3(PO4)2 solution is added to a beaker.  How many moles of Ca3(PO4)2 were added?…

A: Molarity = Number of moles /volume of solution in Litre  Number of moles = weight in grams/ Molar…

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

A:

Q: A mixture weighing 6.200g is 28.0% silicon dioxide or sand, SiO2, 36.0% sodium chloride, or table…

A: We have to calculate the mass (grams) of the baking soda present in 6.200 g of mixture which has…

Q: The amount of nickel(II) present in an aqueous solution can be determined by precipitating the…

A: The concentration of DMG solution is 0.0567 M = 0.0567 mol/L.The concentration of nickel(II) sulfate…

Q: What is the minimum amount of 6.2 M H2SO4 necessary to produce 24.5 g of H2 (g) according to the…

A: Amount of H2SO4 can be calculated by molarity formula.

Q: A student weighs an empty beaker at 85.301 g. A sample of Na2SO4·??H2O is added to the beaker, and…

A: Mass of empty beaker = 85.301 g  Mass of beaker + hydrated salt = 86.607 g  Mass of beaker +…

Q: Aspirin can be prepared from salicylic acid ( C7H6O3), which has a molar mass of 138.12 g/mol, and…

A:

Q: 2. What is the gravimetric factor (a) For acquiring the weight of Ag:CrO, from the weight of AgCI?…

A: The analytical method that is employed for the quantitative determination of unknown substances in…

Q: Is C6H12O6 being created or destroyed by the chemical reaction? If C6H12O6 is being created or…

A: A question based on chemical kinetics. A graph of concentration against time is prescribed based on…

Q: Aspirin can be prepared from salicylic acid ( C7H6O3 ), which has a molar mass of 138.12 g/mol, and…

A:

Q: How many pg hydrogen are in 3.39 x 1015 ng of barium hydrogen carbonate hexahydrate?The answer must…

A: Given, Note: 1 ng = 10-9 g mass of barium hydrogen carbonate hexahydrate [Ba(HCO3)2.6H2O] = 3.39 ×…

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: A mixture with a total mass of 3.12 g contains sucrose (C6H1206, 342.30 g mol-1) and ethyl alcohol…

A: Answer is explained below.  Given that, volume of CO2 = 3.04 L.  Pressure of H2O = 42.20 mm Hg =…

Q: H₂C HU H C CH- CH 0 The compound's molecular formula (eg c13h1201, write 1 if 1 is the subscript) is…

A: The molecular formula of a compound shows the atomic symbols of all the constituting atoms present…

Q: The aluminum in a 0.767 g sample of an unknown material was precipitated as aluminum hydroxide,…

A: given: mass of sample of unknown material =0.767 g mass of aluminium oxide produced = 0.143 g…

Q: If 335 g of Pb(NO3)2 (FW 331.21 g/mol) is added to a solution containing 215 g of K3PO4 (FW 212.27…

A:

Q: Concentrated sulfuric acid (18.3 M) has a density of1.84 g/mL.(a) How many moles of H₂SO₄ are in…

A: The molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of…

Q: Consider the fictional element A (which has a molar mass of 7.00 g/mol) and the fictional element D…

A: Given : Molar mass of A = 7.00 g/mol. Molar mass of D = 13.00 g/mol. Mass of hydrate compound of AD3…

Q: What is the minimum amount of 6.0 M H2SO̟ necessary to produce 20.0 g of H2 (g) according to the…

A: The minimum amount of sulfuric acid has to be given,

Q: What is the mass in milligrams of the solute in 25.0 ml of 0.275 M NaOH? (atomic weights: H=1.01;…

A: Number of moles = mass/molar mass  So, mass = moles × molar mass   Molarity = moles of solute/volume…

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: chemist adds  0.95L  of a  0.0010/molL  copper(II) fluoride  CuF2  solution to a reaction flask.…

A:

Q: The density of octane, C8H18C8⁢H18, is 0.703 g/mL0.703 g/mL. Calculate the number of moles of octane…

A: Given Data :  1.density of octane = 0.703 g/mL  2. Volume = 49.1 mL  Molar mass of octane = 114.23…

Q: Please calculate the mass in grams for:  8.0 mol lead oxide (PbO)

A: Molar mass of Pb = 207.2 g/mol  Molar mass of O = 16g/mol

Q: 0.279 g of the hydrate CoCl2•nH2O is heated to produce 0.197 g of anhydrous CoCl2 (MM = 129.83…

A: The water of crystallization means having a fixed number of molecules present in one formula of a…

Q: 17 - if the mass of 0.8 molar mixtures of NO and CH4 gases is 17 grams; The number of moles of I. NO…

A: From simple calculation by molar mass and mole of the compound we can calculate it

Q: Q 5: Calculate the mass of aluminum precipitated when 24135 coulombs of electricity was passed…

A:

Q: 5) King Krator the Merciless has called on Pogo, a humble goldsmith, to make a crown for the King.…

A: The mass of gold given by King Krator to gold Smith Pogo is ---- 14 oz. The density of gold=19.3…

Q: What is the maximum amount of silver in grams that can be plated out of 4.8 Lof an AGNO, solution…

A: Given volume of solution = 4.8 L density of solution = 1.01 g/ml

Q: Aspirin can be prepared from salicylic acid ( C7H6O3 ), which has a molar mass of 138.12 g/mol, and…

A:

Q: A 4-M sample of hydrochloric acid, HCl, has a density of 1.42 g/ml. What is the mass % (wt/wt) of…

A:

Q: (b) An unknown mass of Na;PO<(s) is dissolved in water to form 50.00 mL of solution. This is…

A:

Q: 410.0 mL of a 4.8 mol/L silver nitrate (AgNO 3 ) a reaction flask. Calculate the mass in kilograms…

A: Given Mass of silver nitrate =m g  Molar mass of silver nitrate = 169.87 g/mol Moles = Mass ÷  Molar…

Q: Consider the reaction: 2 NazPO4(aq) + 3 Cu(NO3)2(aq) Cu3(PO4)2(s) + 6 NaNO3(aq) What mass of…

A:

Q: What mass in grams are in 5.32x10^22 molecules of CO2? For some reason, I'm getting confused on how…

A:

Q: A new method being developed for water treatment uses chlorine dioxide, ClO2, instead of chlorine.…

A: The concentration of sodium chloride (NaClO2), M  = 2.0 M = 2.0 mol/L (M = mol/L) Volume of sodium…

Q: How many equivalents of O²⁻ are there in 2 moles of Al₂O₃?

A: Al2O3 is aluminium oxide.

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".