The density of copper is 8.96 g/cm3. How many copper atoms are in a sphere with a volume of 0.475 cm3?

Q: 1. What is the difference between carbon-13 and carbon-14? a. The number of electrons b. The number…

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Q: The diameter of a US penny is 19 mm. The diameter of a silver atom, by comparison, is only 2.88 Å.…

A: The diameter of one silver atom in the units of mm is calculated as follows:

Q: The diameter of a silicon atom is 2.34 x 10-8 cm. If the silicon atoms were placed next to each…

A: Given:  Diameter of silicon = 2.34 x 10-8 cm Width of paper = 8.5 inch

Q: a 500-mg antacid tablet has 105 mg calcium carbonate (MW = 84.3139 g/mol). What is the %(w/w) of…

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Q: Lithiu 6.941 9.10 37 Rb 47 r tals ids Be Beryllium 9012 S B M Magne 83 131 R Rall Name 12.01 An…

A: We are given: density of mercury = 13.6 g/mL weight (mass) = 26.8 grams volume =?

Q: The diameter of a zirconium atom is 3.10 Å3.10 Å. Express the radius of a zirconium atom in both…

A: Given The diameter of a zirconium atom is 3.10 Å

Q: What is the radius (in cm) of a pure copper sphere that contains 1.14 * 1024 copper atoms? [The…

A: Given information:

Q: How many atoms are contained in a titanium sphere having a diameter of 4.00 mm? The density of…

A: Given : density of titanium = 4.506 g/cm3  And diameter of sphere = 4.00 mm  Since 1 cm = 10 mm…

Q: To the right is a representation of 50 atoms of a fictitious element called westmontium (Wt). The…

A: A mass spectrum is an intensity vs. m/z (mass-to-charge ratio) plot representing a chemical…

Q: Find the mass of 236 atoms of tungsten in Kg

A: Tungsten is a chemic element having atomic number 74. Chemical symbol of tungsten is 'W'  According…

Q: A pure titanium cube has an edge length of 2.78 in. How many titanium atoms does it contain?…

A: Edge length = 2.78 inch, 1 inch = 2.54 cm 2.78 inch = 2.54 × 2.78 = 7.061 cm Density of unit cell =…

Q: How many electrons make up a charge of 56nC? If these are made of copper atoms, how many atoms would…

A: The charge is always quantized. The number of electrons can be determined as follows: Number of…

Q: What is the radius (in cm) of a pure copper sphere that contains 1.27*1-^24 copper atoms?  The…

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Q: how many gold atoms are in a 13.5g sample of gold? the density of gold is 19.3g/cm3

A: Total moles present of a sample = Given weight Atomic weightTotal atom present in a sample = Total…

Q: Suppose the diameter of a type of atom is 2.22 x 10-7 mm. A coin has diameter 1.20 cm. Suppose the…

A: If we divide the diameter of a coin by the diameter of an atom we will get the no. of atoms.  Given…

Q: A silver wire has a diameter of 0.500cm what length of the wire contains exactly 1.0×10²³ atoms of…

A: Given: Diameter of the wire = 0.500 cm  And the number of atoms of Ag wire = 1.0 X 1023 atoms.

Q: 5. Lithium exists as 2 stable isotopes in nature and data is given below. 6.015122 amu x 7.016004…

A: If A1 and A2 are mass numbers of two isotopes and X1 and X2 are their percentage  abundance then…

Q: How many atoms of lead are required to cover a 37.0 cm by 55.0 cm area with a sheet of lead that is…

A: The required volume to cover =  37.0 cm×55.0 cm×0.142 cm…

Q: Chemistry focuses on representing the submicroscopic world of atoms. A billion atoms of gold-197…

A: 1 Billion atoms of Gold weigh  = 3.3 × 10-¹³ g

Q: How many copper atoms are in a cube of copper metal measuring 1.15 cm on each edge? The density of…

A: Given, edge length = 1.15 cm            density of copper = 8.96 g/cm3 Now, volume of cube of copper…

Q: An unknown element X has the following isotopes: 1ºX (20.00% abundant, atomic mass = atomic mass =…

A:

Q: Which pair of atoms constitutes a pair of isotopes of the same element? 29. 14 28 58 B) X 26 A) X…

A: Isotopes are defined as the elements having same atomic number but different mass number.  X1328…

Q: An atom has an average atomic mass of about 24.3 amu. What is the chemical symbol for the atom? Use…

A: Atomic mass is the mass of an atom. SI unit of mass is the kg. Atomic mass is often expressed in the…

Q: What is the atomic mass unit? a mass of a carbon atom b mass of a hydrogen molecule c (1/18) of…

A: What is the atomic mass unit?

Q: 13. Which of the following are isotopes? a. P3- and Ar b. 1251 and 127| c. O and O2- d. Na* and K*…

A: b) 125I and 127I

Q: A pure titanium cube has an edge length of 2.76 in. How many titanium atoms does it contain?…

A: Here, we have to calculate number of titanium atoms.

Q: Titanium has five common isotopes: 46Ti (8.000%, 45.95 amu), 47 T (7.800%, 46.95 amu), 48Ti (73.40%,…

A: Given 46Ti (8.000%, 45.95 amu), 47 Ti (7.800%, 46.95 amu), 48Ti (73.40%, 47.95 amu), 49Ti (5.500%,…

Q: How many atoms are contained in a block of aluminum metal measuring 4.0 mm x 9.0 mm x 11 mm? The…

A:

Q: A 0.383 g sample of an element contains 1.943 × 10 21  atoms. What is the element symbol

A: Given, amount of sample =0.383 gnumber of atoms of the sample =1.943×1021 atomswe are asked to…

Q: A platinum atom has a radius of 177 pm. If you could string platinum atoms like beads on a thread,…

A: Given that, Radius of Pt-atom = 177 pm =177×10-12 m= 177×10-10 cm =1.77×10-8 cm Length of necklace =…

Q: A pure copper cube has an edge length of 2.76 cm How many copper atoms does it contain? (volume of…

A: Density of a unit cell is given by, Density = Z×Ma3×NA where, Z is the number of atoms in the unit…

Q: Antimony has two naturally occuring isotopes, Sb121 and Sb123. Sb121 has an atomic mass of 120.9038…

A: Given: Weight of isotope Sb121 = 120.9038 u Weight of Isotope Sb 123 = 122.9042 u. Average atomic…

Q: Copper has two naturally occurring isotopes with atomic masses of 62.9296 u (C u) and 64.9278 u…

A: When two atoms have same atomic number and different atomic mass, such atoms are called isotopes.…

Q: 2) The spherical atomic nucleus of potassium has a radius of about 4 x 10-13 cm.; 6.02 × 1023 of…

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Q: Calculate the atomic mass of magnesium. The three magnesium isotopes, Mg-24, Mg-25, and Mg-26, have…

A: Isotope is the same number of protons and electrons but have a different number of neutrons in an…

Q: A certain element has a density of 7.19 g cm3 . A cube of this element with a side of 2.00 cm…

A: Given,Density of unknown element = 7.19cm3Cubic side of the element = 2.00cmNumber of atoms = 6.66 ×…

Q: 5. A sample of Magnesium contains three isotopes and its average atomic weight is 24.35 amu. If the…

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Q: 3. The atoms in the previous question are isotopes of each other. Based on this information, list…

A: Given that, Atoms are isotopes of each other. What are the requirements for two atoms to be isotopes…

Q: The atomic radius of a gold atom is 144 x10-12 m.  The volume of a gold atom can be calculated using…

A:

Q: An American penny is 97.5% zinc and 2.5% copper and hasa mass of 2.5 g. Use the approximation that a…

A: Given, An American penny is 97.5% zinc and 2.5% copper and has a mass of 2.5 g. Use the…

Q: A bicycle part made of titanium, Ti, has a volume of 32 cm . Titanium has a density of 4.50 g/cm .…

A:

Q: The volume of a single lead atom is 2.24×1023 cm³. What is the volume of a lead atom in microliters?…

A: Here the volume of a single lead atom is given in cm3 and we have to convert it into microliters.…

Q: some chlorine atoms have an atomic mass of 37, while others have an atomic mass of 35. What is the…

A: The mass number of an atom is the sum of proton and neutrons present in that atom.  Mass number =…

Q: The average mass of a carbon atom is 12.011.  Assuming you were able to pick up only one carbon atom…

A: The average mass of a carbon atom is 12.011. There are three isotopes of carbon. C-12, C-13, and…

Q: If a row of approximately 5.0 x 107 atoms measured 1.0 cm, how long would a row of 6.02 × 1023 atoms…

A: Given is row of atoms, 1.0 cm = 5.0×107 atoms 6.02×1023 atoms = ?

Q: The volume of a single strontium atom is 4.15 x 10-23 cm³. What is the volume of a strontium atom in…

A: It is a volume unit conversion problem where we are asked to convert the volume from cubic…

Q: How many atoms are contained in a titanium sphere having a diameter of 12.0 mm? The density of…

A:

Q: How are isotopes of an element identical to one another? How are they different from one another

A: Isotopes of an element is defined as atoms of same element having different mass Number but same…

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.