Answered: How many moles of atoms are in each…

How many moles of atoms are in each elemental sample? (a) 4.6 × 102ª Pb atoms (b) 2.87 × 1022 He atoms (d) 4.41 × 1021 Ca atoms (c) 7.91 × 10²3 K atoms

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter3: Mass Relations In Chemistry; Stoichiometry

Section: Chapter Questions

Problem 93QAP: A sample of cocaine, C17H21O4N, is diluted with sugar, C12H22O11. When a 1.00-mg sample of this...

See similar textbooks

Related questions

Q: Sorbose, C6H12O6, is used in making vitamin C. A sorbose sample contains 36.0 g of carbon atoms.…

A: Mass of carbon =36 g Moles of carbon in sorbose=36 g ×1 mol12.01 g=2.9975 mol Moles of H atom can…

Q: In 1961, scientists agreed that the atomic mass unit (amu)would be defined as the mass of an atom of…

A: Yes, the Avogadro number is changed and now becomes bigger than previously. Yes, the definition of a…

Q: A mass of 145 g of a certain element is known to contain approximately 3.64 x1024 atoms. What is the…

A: Let the molecular weight of the element is M gm/mol. Moles = weight/mol. wt. Or, moles = 145/M We…

Q: What is the molecular mass of iron (III) oxide (Fe2O3)? Enter your answer rounded to four sig figs,…

Q: Ammonia (NH3)(NH3) and hydrazine (N2H4)(N2H4) are both binary compounds of nitrogen and hydrogen.…

A: Ammonia is formed according to the following balanced Chemical equation- N2 + 3H2 ---> 2NH3…

Q: Naturally occurring copper consists of 63Cu (mass 62.9296 amu) and 65Cu (mass 64.9278 amu), with an…

Q: A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: Note : As per our guidelines we are supposed to answer one question .please resubmit the other…

Q: The organophosphate nerve agent A-234 is believed to have the formula C5H8F2NO3P. It is one of the…

A: Molecular formula: C5H8F2NO3P Isotope of organophosphate nerve agent with molecular formula…

Q: How many Atoms are there in 6CO2

A: We know that atoms are the smallest unit of matter.

Q: The density of helium in a balloon is 1.18 g/L. If a balloon holds 2.91 L of He, how many atoms of…

A: Calculation of mass of Helium: Mass=Volume×density=2.91 L×1.18 g/L=3.4338 g Calculation of no. of…

Q: The density of helium in a balloon is 1.18 g/L. If a balloon holds 2.95 L of He, how many atoms of…

A: It is given that :Density of helium in a balloon = 1.18 g/LVolume = 2.95 L

Q: The density of helium in a balloon is 1.18 g/L. If a balloon holds 2.93 L of He, how many atoms of…

A: The mass of the species can be defined as the product of the density of the species and the volume…

Q: Naturally occurring chlorine consists of 35Cl (mass 34.96885 amu) and 37Cl (mass 36.96590 amu), with…

A: Chlorine has two isotopes, Cl35 and Cl37.

Q: On a periodic chart of the elements, molar mass (M), also called atomic weight, is often listed as…

A: A chemical compound consists of two or more different elements which are bonded with each other…

Q: What mass of ammonia gas (NH3) contains 2.8*10^24 hydrogen atoms?

Q: 3.123 In the formation of carbon monoxide, CO, it is foundthat 2.445 g of carbon combine with 3.257…

Q: Calculate the average atomic mass of Amazium, a newly discovered element (Amazium, symbol Az) which…

A: Given :- There are only 2 naturally occurring isotopes of Amazium. Mass of isotope Az-230 = 229.995…

Q: What is the mass percent of chlorine in sodium chloride?

A: Mass of one mole of chlorine=35.43 Mass of one mol sodium chloride (NaCl)=58.44 g The mass…

Q: 6. Explain what the coefficient of 4 means in the following chemical formula: 4K,SO,

A: Given that, 4K2SO4

Q: The molar mass of nicotine C10H14NX is 162 g/mol. What is the value of x?

Q: In 100.5 g of water (H2O), how many total atoms are there?

A: Number of atoms in a molecule = Atomicity of molecule x no. of moleculeNumber of molecule = no. of…

Q: Rubudium have two isotopes, 85Rb has mass 84.9117 amu and 87Rb has mass 86.905 amu. If the average…

A: The naturally occurring Rubidium has two isotopes, therefore both of them are present in Rubidium…

Q: How many moles of iodine atoms are there in a sample that consists of 1.35e+23 molecules of…

A: Mole=no of molecule÷6×1023 Mole=1.35×1023÷6×1023 Mole= 0.225 1 mole iodine elememental have 2 mole…

Q: 1 Cathode rays are ________. atoms X-rays electrons neutrons protons 2 Which one of the…

A: (1) The cathode ray experiment was conducted by J.J.Thomson and found out the presence of a small…

Q: The number of Cr atoms in a 26.0 g sample of chronium is x. How many atoms, expressed in terms of x,…

A: Number of moles = mass in gram / molar…

Q: H,O, + HgO - H,0 + 0,+ Hg How many atoms of H,0, are in 5.36 x 102 atoms of HgO?

A: Given, the chemical reaction as follows,H2O2+HgO→H2O+O2+Hgnumber of atoms of HgO =5.36×1022 atomswe…

Q: 9. If a cabin et is made of 5.65 grams of Gold, how many atoms of gold are in the cabinet?

Q: Element Kittypurrium (named after one of TA's cats) has two isotopes: Isotope 1 has an atomic…

A: Percent of isotop 1 = 91.162% Atomic weight of isotop 1 = 40.005 g/mol Percent of isotop 2 =…

Q: A sample of 0.741 mol of a metal M reacts completly with excess flourine to form 57.8 g of MF2. What…

A: Chemical equation: M + F2 ------> MF2 Number of moles of MF2 = number of moles of M

Q: How many grams of K2C2O4, potassium oxalate, would containe 182 grams of pure potassium?

A: The molar mass of potassium oxalate can be calculated as:

Q: How many atoms are there in 89 molecules of acetic acid?

A: The chemical formula of acetic acid is CH3COOH.

Q: 4. An element “X* has five major isotopes, which are listed below along with their abundances. What…

A: We are having an element X having five isotope along with their abundance and mass . We have to…

Q: The weed killer “Roundup” has a chemical formula of ( C3H8NO5P) What is its molecular mass?

A: The overall mass of one molecule of a substance is generally known as molecular mass (or molar…

Q: A compound is 32.88% C, 4.14% H, 19.18% N and 43.80% O by mass, and it has a molar mass of 219…

Q: A certain metal oxide has the formula MO, where M denotes the metal. A 39.46-g sample of the…

A: Given the mass of sample = 39.46g Mass of metal left after heating = 31.70g The atomic mass of metal…

Q: The number of nonmetallic atoms in Al2 (SO3 )3 is?

A: The given compound is Al2(SO3)3. In periodic table right end elements are non metals and left end…

Q: An unknown element X has the following isotopes: 5X (72.5% abundant) and 67X. What is the average…

Q: Part A 13 How many moles of atoms are in 6.00 g of C? Express your answer numerically in moles. •…

A: Given : Mass of 13C = 6.00 g

Q: 2) A piece of magnesium metal was placed in a test tube containing hydrochloric acid. If I start…

A: Magnesium reacts with HCl to give MgCl2 and H2. The Balanced equation of the following reaction is…

Q: We have a sample of 7.2 moles of the ionic compound, potassium dichromate, K2Cr2O7. How many Cr…

A: Given that , No. Of moles of K2Cr2O7 = 7.2 moles We will calculate the no. Of atoms of Cr as…

Q: Assume that for the following molecules, carbon=12 amu, hydrogen= 1 amu, nitrogen= 14 amu and…

A: • Molecular oxygen is a diatomic molecule consists of two oxygen atoms held together by a covalent…

Q: What is the sum of the masses of 1 Fe atom + 2 Cl atoms? Enter your answer rounded to four sig figs,…

A: Given : To determine the sum of the masses of 1Fe atom + 2 Cl atoms

Q: Ammonium dichromate is a bright orange, crystalline solid. When heated to a high temperature, one…

A: Ammonium dichromate is a bright orange, crystalline solid. At high temperature, ammonium dichromate…

Q: 2. How many moles would there be in 500 atoms of Silver? - 3. What is the mass of exactly 230 Sodium…

Q: 2. Calculate the number of atoms in: b) .23 mole gold, Au

A: Atoms are the smallest unit or the basic units of matter. It defines an element. Gold is an element…

Q: In one experiment you reacted 45.7g of Aluminum with 182.8g of Iron (III) oxide to produce Aluminum…

A: GivenAluminium reacts with Ferric oxide to produce Aluminium oxide and ironThe mass of aluminium=…

Q: (2) ihä The chlorine's average -5 atomic mass of a mixture of chlorine-35 and chlorine-37 if…

A: Chlorine is a Group-7A element with the atomic number of 17. It has 7 valence electrons. Isotopes of…

Q: I'm a crystal of silver, four atoms occupy the volume of a cube that is 0.409 no per side. Taking…

A: Given:Edge length = 0.409 nmDensity = 10.5Calculate the number of atoms in one mole of silver ?

Question

How many moles of atoms are in each elemental sample?
(a) 4.6 × 102ª Pb atoms
(b) 2.87 × 1022 He atoms
(d) 4.41 × 1021 Ca atoms
(c) 7.91 × 10²3 K atoms

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

7. What is the mass in grams, of Vitamin C (C6H8O6) that contains 1.076 grams of carbon?
In 1961, scientists agreed that the atomic mass unit (amu)would be defined as the mass of an atom of 12C. Before then,it was defined as the average mass of an atom of naturally occurring oxygen (a mixture of 16O, 17O, and 18O). The current atomic mass of oxygen is 15.9994 amu. (a) Did Avogadro’snumber change after the definition of an amu changed and, if so,in what direction? (b) Did the definition of the mole change?(c) Did the mass of a mole of a substance change? (d) Before1961, was Avogadro’s number 6.021023(when considered tothree significant figures), as it is today?
Consider a 134.5 g sample of the compound manganese(IV) perchlorate. Using the formula Mn(ClO₄)₄ (MM = 452.74), what is the percent by mass of Mn in the compound?
A given sample of a xenon fluoride compound contains molecules of a single type XeFn , where n is some whole number. Given that 8 x 1020 molecules of XeFn weigh 0.225g, calculate n.
The number of Cr atoms in a 26.0 g sample of chronium is x. How many atoms, expressed in terms of x, would be contained in 26.98 g of aluminum? This is a conceptual question. Here are the multiple choices A. x/2 B. x C. 2x Dx+2
Q. How many oxygen atoms are there in 231 formula units of Al(NO3)3? (I don't know what the formula units is)
1) What is the advantage of expressing mass in moles? 2) The pendulum of an astronomical observatory clock swings in a very small arc. What purpose does this serve?
Up late, a (tired) engineer calculated the molar mass of nitroglycerin (C3H5N3O9) to be 196.2 g/mol, but this in correct. What is the percent error of this incorrect molar mass? Answer: __________ % Round to the nearest tenth (three sig figs)
Calculate the percent of calcium in Ca3(PO4)2 to four significant figures.
6.61 x1019 molecules of hydrogen gas,(H2) are equal to how many grams of hydrogen gas?
When 7.003 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 20.50 grams of CO2 and 12.59 grams of H2O were produced.In a separate experiment, the molar mass of the compound was found to be 30.07 g/mol. Determine the empirical formula and the molecular formula of the hydrocarbon. Enter the elements in the order presented in the question.
By x-ray diffraction it is possible to determine the geometric pattern in which atoms are arranged in a crystal and the distances between atoms. In a crystal of silver, four atoms effectively occupy the volume of a cube 0.409 nm on an edge. Taking the density of silver to be 10.5 g/cm3, calculate the number of atoms in one mole of silver.