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This is tricky because, believe it or not, there are potentially as many atoms in a grain of sand as their are stars in the entire universe. But, here goes.
Sand is made up of Silica, which has the formula SiO2
silicon weighs 28 atomic units
Oxygen weighs 16 atomic units
so each SiO2 weighs 60 atomic units
There are 6.023 x 1023 atomic units in a gram. that is 6 with 23 zeros after it.
So there would be 6.023 x 1023 / 60 = 1x 1022 SiO2s in a gram, so 3 x 1022 atoms in a gram.
Say a grain of sand is 1mm across it has a volume of 0.001cm3;1cm3 of sand weighs about 2.6g, so a grain of sand will weigh 0.0026g.
So, to find the number of atoms in a grain of sand we multiply the number of atoms per gram by the number of grams:
3 x 1022 x 0.0026g = 7.8 x 1019 atoms
or
78,000,000,000,000,000,000.
Assuming you could count 2 atoms per second, it would take approximately 1,236,681,887,366 (1.2 Trillion) years.
Yes, really. If I were you I would try counting at least four every second, then it would only take 6.2 billion. You'd have a lot more free time.
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How many copper atoms would have to line up side by side to form a line 1m long?
3
How much does a grain of rice weigh?
A very rough approximation would be in the order of 1023 atoms, ie a 1 followed by 23 zeros, which is a very big number. Given that there are over 10^21 atoms in a large grain of sand, weighing 0.03g there will be a lot more (maybe x10 or x100) in a grain of rice (which is much larger than a grain of sand). Note that rice is organic so will have a lot of hydrogen atoms as well as carbon, oxygen, nitrogen, and many others in lesser degree. The previously stated answer of "30,000 atoms in one grain of rice" is absurd. Either the poster is testing how long it takes for an incorrect answer to be fixed or is quite ignorant of atomic dimensions (or both!).
How many 0.1 nm H atoms will fit on a line that is 1 cm long?
It would depend on the type of atom. Atoms of different elements come in different sizes. We can take an average of about 1 angstrom, that is 10^-10 meters or 10^-8 cm. Using that average you would need 10^8 atoms.
What is this substance in which the number of atoms is not important as long as all of the atoms are of the same type?
Element
If a typical grain of salt has a mass of 0.3 mg how many unit cells does it contain?
the weight of a grain of salt is about 5.85x10-5 gramsApproximately how many atoms are in a grain of salt?Asked by: Roger Bevels (teacher)AnswerThis is mainly an estimation problem -- there is no exact measure of how big a 'grain of salt' is. So, the answer will be only correct within an order of magnitude (a factor of 10).The first step is to estimate how large a grain of salt is. I spilt some salt onto the table, and visually estimated that about three grains of salt placed end-to-end are about a millimeter long. (Your mileage may vary.) So, as a simple estimate, I'll assume that salt grains are 0.3 millimeters long.The next assumption is that salt crystals are cubes, with 0.3 millimeter sides. In fact they tend to be, since the crystal structure of NaCl is cubic. However, most have broken corners, but we will ignore that.The density of NaCl is about 2.165 gr/cm3. With the cube assumption, we find that a grain of salt is about 5.85x10^-5 grams. (We could have arrived at this result by weighing an individual grain, or by weighing a gram and then counting the number of grains in it, but this is left as an exercise for the PhysLink reader.)The next thing we need is the weight of a 'salt atom'. There is no such thing as a salt atom, it consists of Na (sodium) and Cl (chlorine) atoms. So, we need to use an average value. The atomic mass of Na is 23 gr per mole, and the atomic mass of Cl is 35.5 gr per mole. So, the average 'atomic weight of salt' is 29.25 grams per mole.Now it is a simple matter to find how many atoms there are in a grain of salt. (Note that one mole contains Avogadro's number of atoms, which is 6.02x1023.)So a grain of salt contains about:5.85x10-5 gr/ (29.25 gr / 6.02x1023) = 1.2x1018 atoms, half of which are sodium atoms. (The other half is chlorine atoms, of course.)Answered by: Yasar Safkan, Ph.D. M.I.T., Software Engineer, Istanbul, Turkey
How long would it take to count a mole of rice?
If you count one rice grain per second, it will take 6.022e23 seconds to count 1 mole of rice. 1 year is 31556926 seconds, so it will take 1.9e16 years to count 1 mole of rice.
How long will it take to count a Google?
It would take a prohibitively long time. A "googol" is 10100 (a very large number). There are only about 1080 atoms in the observable universe.
How long would it take to count the atoms on a piece of paper?
Time taken would depend on the size of the paper and the sophistication of the measuring device ... mainly the rate of counting of which it's capable.
How many zeros in 326 million trillion?
That depends on whether you're using the "long count" or the "short count". In the short count, it would be 18. In the long count, it would be 24.
How long would it take to count from 1 to 1000000 out loud?
That depends on how fast you can count.
How long do you think it would take to count to 1000000?
It would take nothing
How long would it take to count to a trillion?
599,999 days.
What are the general groupings of rice?
Long grain, short grain & short grain.
Which one is a step used for balancing chemical equations?
Count the atoms in each substance in the reactants and products. (Apex)
In 12.0 g of carbon, there are NA = 6.02 x 10^23 carbon atoms (Avogadro’s number). If you could count 1 atom per second, how long would it take to count the atoms in 1.00 g of carbon Express your answer in years?
If you could count 1 atom per second, it would take you 6.02 x 10^23 seconds to count the atoms in 12.0 g of carbon. Since there are 60 seconds in a minute, 60 minutes in an hour and 24 hours in a day and approximately 365 days in a year, this is equivalent to (6.02 x 10^23)/(60 x 60 x 24 x 365) = approximately 19 billion years.
What is the weight of a grain of long grain rice?
20mg
How much sodium in rice?
Rice, brown, long grain, cooked-10mg Rice, white, long grain, par-boiled-5mg Rice, white, long grain, dry-9mg Rice, white, long grain, instant-5mg Rice, white, long grain, regular, cooked-2mg
