Find surprising answers to physics questions Written by Dr Christopher S Baird...

How many atoms thick is aluminum foil? Asked by David A Biche Answer Approximately 193,000 atoms thick This is a fairly rough estimate, from classroom data We took squares of aluminum foil, measured the surface area and mass By dividing the mass by a known density value, we obtained the volume of aluminum foil in our sample...

Suppose you have 10 gram of carbon Now, it should be converted in terms of atoms We know that the molar mass of 1 mole of carbon is equal to 12 It means that 12 grams per mole Also, the Avogadro constant is 602 x 10 23 So, the conversion of carbon from grams to atoms is given by = 10 1/12 602 x 10 23 = 502 x 10 23...

13-08-2011 0183 32 An atom of rhodium Rh has a diameter of about 25 x 10 -8cm- What is the radius of a rhodium atom in angstroms and in meters- How many Rh atoms would have to be placed side by side to span a distance of 60 um if confused about u in um it looks like a u with a longer line on the left side,dont know wut the symbols called - If the atom is assumed to be a ,...

Problem 2 How much does 100 million atoms of gold weigh? Solution 1 Determine moles of gold in 100 x 10 8 we ll assume three sig figs in the 100 million 100 x 10 8 atoms divided by 6022 x 10 23 atoms/mol = 1660578 x 10 175 16 mol 2 Determine grams in 166 x 10 175 16 mol of gold 1660578 x 10 175 16 mol times 19697 g/mol = 327 x 10 175 14 g to three sig fig...

The radius of an atom of gold Au is about 135 197 a Express this distance in nanometers nm and in picometers pm b How many gold atoms would have to be lined up to span 10 mm? c If the atom is assumed to be a sphere, what is the volume in cm3 of a single Au atom?...

We have to assume that the gold atom is spherical in shape The volume of a sphere is calculated by this formula V = 4 3 πr 3 86 180 ratings Problem Details The radius of an atom of gold Au is about 135 197...

602 x 1023 atoms 1 mole 2 How many atoms are in 100g of gold? 10 g gold 1 mole 602 x 1023 atoms = 306 x 1022 atoms 1970g 1 mole PRACTICE PROBLEMS 1 How many moles are equal to 625g of copper? 625g of copper 1 mol = 977 mol Cu 64 g Cu 2 How many moles of barium are in a sample containing 425 x 1026 atoms of barium?...

How many Sn atoms would it take to span a distance of 60 , How many atoms of antimony must be lined up to make a line that , m, how many gold atoms are ,...

1 atom 1 a2 508 10 2 = 139 x 109 atoms/m Problem 4 For aluminum at 300K, calculate the planar packing fraction fractional area occupied by atoms of the 110 plane and the linear packing density atoms/cm of the 100 direction Solution Aluminum at 300K has FCC structure Volume unit of a cell 3 23 10 cm 1 mole 4 atoms V =...

28-07-2016 0183 32 Two years ago, I wrote a blog post called Two Ways to Make Nanoparticles, describing the difference between top-down and bottom-up methods for making nanoparticl In the post I commented, we can estimate, knowing how gold atoms pack into crystals, that there are about 2000 gold atoms in one 4 nm diameter gold nanoparticle...

How many gold atoms would have been lined up to span 95 mm? 35 10 7 answered 7 years ago Related questions Gold Australia Where are the Australian gold fields? answered 7 years ago Gold How much would a five gallon pail of gold weigh? answered 7 ,...

Problem 2 If it takes 336 x 10-19 J of energy to eject an electron from the surface of a certain metal, calculate the longest possible wavelength, in nanometers, of light that can ionize the metal Solution 1 Determine the frequency E = hν 336 x 10-19 J = 6626 x 10 175 34 J s x x = 5071 x 10 14 s 175 1 2 Determine the wavelength λν = c x 5071 x 10 14 s 175 1 = 300 x 10 8 m/s...

=444 1022atom/cm3 Note that GaAs and Ge have almost exactly the same lattice constant and the same crystal structure, so they have almost exactly the same atomic density 2c Ga has 3 valence electrons column III of periodic table ,...

Find step-by-step Chemistry solutions and your answer to the following textbook question The radius of an atom of gold Au is about 135 \dot A How many gold atoms would have to be lined up to span 10 mm?...

14-06-2020 0183 32 Okay, okay Her atom will put okay, um radius, that s a radius So if we re talking about the whole list span, you know a radius is only half of it So we have to consider the diameter So we re gonna multiply this number by two Um ,...

28-09-2021 0183 32 We are asked to calculate the number of gold atoms that have to be lined up to span 55 mm given the radius of an atom of gold Au is about 135 197 To solve this problem, we shall follow these steps Step 1 Convert the radius from 197 to mm Step 2 Divide the length ie 5 mm with the diameter in mm...

14-06-2020 0183 32 Okay, okay Her atom will put okay, um radius, that s a radius So if we re talking about the whole list span, you know a radius is only half of it So we have to consider the diameter So we re gonna multiply this number by two Um and then that s how much the diameter of an atom will be...

29-04-2017 0183 32 See the explanation One mole of anything, including atoms, is 6022xx10 23 Avogadro s number of them Usually you will have a given mass of an element There are two basic steps to get from the given mass to the number of atoms They are Mass rarr Moles and Moles rarr Atoms The following example will show you how to do that Example ,...

Electrons in a hydrogen atom must be in one of the allowed energy levels If an electron is in the first energy level, it must have exactly -136 eV of energy If it is in the second energy level, it must have -34 eV of energy An electron in a hydrogen atom cannot have -9 eV, -8 eV or any other value in between...

How many gold atoms would have to be lined up to span 55 mm? 20 x 10 7 atoms The radius of an atom of gold Au is about 135 A If the atom is assumed to be a sphere, what is the volume in cm 3 of a single Au atom? 103 x 10 -23 cm 3 Which pair of elements is most apt to form a molecular compound with each other?...

A gold atom is 25 10-10 m in diamater If you assume that the gold atoms line up in rows, about how many atoms would there be in a cubic cm of gold? What I did was convert the cubic centimetre into 001m and divided 001m by 25 10-10 to see how many gold atoms there would be lined up in a row if the total length was 001m After that I just cubed it to get an ,...

01-02-2013 0183 32 How many gold atoms would have to be lined up to span 90mm ? If the atom is assumed to be a sphere, what is the volume in cm 3 of a single Au atom? For the first question here is what I did 9mm x 10 -3m / 10 -10m / 135A to give me 67 x10 7 atoms...

14 75 b 4Calculate the speed to which a stationary He atom mass 40026m u would be accelerated if it absorbed each of the photons used in Exercise 74b 15 77 b A laser used to read CDs emits red light of wavelength 700 nm How many photons does it emit each second if its power is a 010 W, b 10 W? 16...

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