The molecular formula for caffeine, one of the key compounds found in coffee and tea, is C8H10N4O2. (i) How do I calculate the percent mass of each of the elements in caffeine.

Q: In terms of mass, calculate the percentage of the active ingredient for each of the following…

A: Mass percentage is defined as the total mass of the substance( here active ingredients) divided by…

Q: 6. Give a clear description of how you would separate the following mixtures: a. Sugar from water b.…

A: a) We have to separate Sugar from water  : The easiest way to separate a mixture of sugar and water…

Q: What is the difference in mass between a nickel that weighs 4.8 g and a nickel that weighs 4.8673 g?

A: Given,  Mass of nickel = 4.8…

Q: eral contains 5.032 % of a precious metal, by mass. The precious metal as a density of 3.681 g/cm°.…

A: Density = 3.681 g/cm3  Mass % of metal mineral = 5.032%  Density = mass/volume

Q: The radius of an atom of gold (Au) is about 1.35 Å. Part A: Express this distance in nanometers…

A: Radius of

Q: 6. The density of salt is 2.16 g/cc. If you used 3.00 cc on your food, how much in ug is that?

A: The mass per unit volume of a substance is known as the density of the substance. The density of a…

Q: What mass of iron (d = 7.874 g/cm') does a 2.0 in x 1.5 in x 10.0 in sample have?

A: Given  density of Iron = 7.874 gram/ Cm3 Volume = 2.0 inch × 1.5 inch × 10 inch 1 inch   = 2.54 Cm…

Q: The “lead” in lead pencils is actually almost pure carbon and the mass of a period mark made by a…

A: Answer = 5.02 x 10 19

Q: A penny has a thickness of approximately 1.0mm. If you stacked Avogadro’s number of pennies one on…

A: The thickness of a penny=1.0 mm Avogadro's number=6.022 x 1023  Avogadro’s number of pennies were…

Q: The density of gold metal is 19.3 g/cm3, while that for silver is 10.5 g/cm3. Suppose you had the…

A:

Q: (a) Palladium (Pd) is an element with properties similar to those of platinum. It is useful in…

A: Given : Mass of bar = 96.03 g Length of bar = 10.7 cm Diameter of bar = 9.82 mm = 0.982 cm…

Q: Give the names of the elements represented by thechemical symbols Li, F, P, Cu, As, Zn, Cl, Pt, Mg,…

A: To find: The name of the given elements represented by the chemical symbol

Q: A metallurgist wants to gold-plate a thin sheet with the following dimensions: 1.5 in x 8.5 in x…

A: first we have to find the volume, volume=length ×width ×height  then we know, density=mass/volume…

Q: If a cube of table sugar, which is made of sucrose, C12H22O11, is added to concentrated sulfuric…

A: Molar mass of Sucrose (C12H22O11) =12×Molar mass of each carbon atom + 22×molar mass of each…

Q: What is the mass in grams 1.46 x 10^24 of atoms of krypton? a. _____grams b.  How many krypton…

A:

Q: What is the mass, in kilograms, of 7.76 x 10-4 molecules of carbon tetrachloride? Round your answer…

A: The given data contains, number of molecules of carbon tetrachloride = 7.76×1024

Q: The following statements are ways in which mixtures differ fundamentally from compounds EXCEPT:…

A: Compounds are explained as substances obtained through chemically combining elements. Mixtures are…

Q: In the compound CGH1303, what percent by mass is hydrogen? In Na2CO3, what percent (by mass) is C?…

A: Three different questions about finding the percent composition of individual elements in a…

Q: 1) Which of the following is chemical property? A. Objects made of silver become tarnished. 3+ B.…

A: Chemical property of a substance is the property that observed after or during the chemical…

Q: Gold (Au) has a density of 19.32 g-cm-3. If a spherical gold nanoparticle has a diameter of 50 nm…

A: Density of Gold nanoparticle is 19.32 g/cm3 and its volume is 7*104 nm3.

Q: It has been estimated that there is 4.00 × 10-4 mg of gold per liter of seawater. At price of…

A: This question can be solved by using basic conversion factors as used in the solution given below. 1…

Q: An antacid tablet weights 1.36g. If the percent active ingredient of calcium carbonate is 38.2%,…

A:

Q: A 100 mL solution of theobromine in water is made, and the solution has a density of 1.16 g/mL. If…

A: Given: Density of theobromine solution = 1.16 g/mL The density of water = 1g/mL, To calculate:…

Q: A compound is found to be 30.45% N and 69.55 % O by mass. If 3.01 g of this compound occupy 780 mL…

A: Empirical Formula :- When we write the chemical formula of a compound with the simplest ratio or…

Q: What is the mass, in grams, of 1.40×1021 molecules of aspirin, C9H8O4C9H8O4? Express your answer…

A: The number 6.022 × 1023 indicating the number of atoms or molecules in a mole of any substance is…

Q: a 2.86E1 g sample of NaHCO, how many grams of sodium are present? Use two decimal places in atomic…

A: Given weight of NaHCO3 = 2.86 E1 = 2.86 × 101                                                = 28.6…

Q: It has been estimated that there is 4.00 × 10-4 mg of gold per liter of seawater. At price of…

A: 1 km3 = 1012 L Therefore, 7.53 km3 = 7.53  x 1012 L

Q: It is estimated that an adult person contains 6.3 × 103 ppm phosphorus. What mass of phosphorus in…

A: By definition, ppm refers to parts per million.  Therefore, ppm of phosphorus in adult person would…

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: The formula for lactose is C12H22O11, and the monohydrate is C12H22O11H2O. What is the percent by…

A:

Q: The natural abundances of elements in the human body, expressed as percent by mass, are: oxygen…

A: The given data contains, person weighs =62 kg =62000 g. Natural abundances in mass percent are, O…

Q: What is the mass of 4.00 cm^3 of sodium, with a density of 0.97 g/cm^3?

A: MATHEMATICAL TREATMENT OF MEASUREMENT RESULTS Learning Objectives By the end of this section, you…

Q: What is the symbol for the element that is in group VIIA(17) and period 3?   What is the symbol…

A:

Q: All of the platinum ever mined = 25 ft3 What is the price of all of the paltinum ever mined?…

A: The conversion of volume of platinum from 25 ft3 into cm3 can be done as,

Q: Student K was asked to determine whether his bar was made of pure palladium.  II) Student S was…

A:

Q: What is the mass, in grams, of exactly 230 sodium atoms? Would it be the same answer only in grams?…

A: Steps to convert atoms to grams • Convert atoms to moles - Divide the number of atoms with Avogadro…

Q: Given your experience in mass determinations and with volumetric glassware, which factor used in…

A:

Q: 2. You can identify a metal by carefully determining its density. A 2.166 g piece of an unknown…

A: Density of a substance is defined as its mass per unit volume.  Mathematically,  Density(d) =…

Q: What is the mass in grams of 8.91x 1016 chromium atoms?

A: Given :-  number of Cr atoms = 8.91 × 1016 atoms  To be calculated :-  mass of Cr (in grams)

Q: Aluminum (Al) – Lithium (Li) alloys are widely used in the aircraft industry to reduce weight and…

A: According to the question we have, The desirable density is given by ρ = 2.50 g/cm3 and we know…

Q: Which is considered an elemental substance? A.CO (carbon monoxide) B.H2O (water) C.I2 (iodine) D.A…

A: Given,CO (carbon monoxide)H2O (water)I2 (iodine)A and C are elemental substances.All of the above…

Q: How do i Complete the following calculation? Determine the number of grams of Carbon in 3.14 x 1032…

A: To get the number of gram calculate mole then with the help of mole calculate mass.

Q: What mass of potassium gold cyanide, KAu(CN)2, contains 311 g (10 ounces) of gold?

A:

Q: A study of the Earth by The National Aeronautics and Space Administration (NASA) determined there…

A: Given  7.00 x 1011 tons of carbon    Conversion factor:  1 ton = 907.19 kg  1 kg = 1000 g = 103 g…

Q: barrels of toluene are being stored on the moon for use in onsite manufacturing. If each barrel…

A:

Q: calcium, how many kilograms of calcium are there in a

A:

Q: What is the mass of phosphorus in a 45 kg person? mass of P = %3D TOOLS x10

A:

Q: The mass of one ethanol (C2H6O) molecule is 7.65 × 10–23 grams. True or False

A: The given compound is ethanol. The molar mass of the ethanol is 46.07 g/mol.

Q: K   = 0.2246 meq/100g, Mg = 5.3 meq/100g, Ca = 10.4538 meq/100g weight of 1 Ha = 7.761 x 10^6 Kg how…

A:

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.