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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.
What else can I help you with?
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 copper atoms would have to line up side by side to form a line 1m long?
3
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
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?
A substance where the actual number of atoms is not significant, as long as they are all of the same element, is called a chemical compound. This is because the properties of compounds are determined by the arrangement and types of atoms within the molecules, rather than their quantity.
The diameter of an helium atom is 100 pico meters how many helium atoms must be placed end to end to make chain of helium atoms one centimeters long?
To calculate the number of helium atoms needed to make a chain 1 cm long, divide the length of the chain (1 cm = 10,000 pm) by the diameter of a single helium atom (100 pm). So, 10,000 pm / 100 pm = 100 helium atoms. Therefore, 100 helium atoms placed end to end would make a chain 1 cm long.
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 long does it take to count to 1 mole?
Counting to 1 mole of anything would take an astronomically long time—approximately 6.022 x 10^23 units—for instance, counting individual atoms in a mole of carbon. If you were to count without stopping, it would take billions of years.
How long would it take to count from 1 to 1000000 out loud?
That depends on how fast you can count.
How long would it take to count a mole of rice?
Oh, what a delightful question! Counting a mole of rice would take quite a long time, my friend. You see, a mole is a very large number, approximately 6.022 x 10^23, so counting each individual grain of rice would take you far longer than a lifetime. But don't worry, just imagine the beautiful painting you could create while pondering such a lovely thought!
What is the weight of a grain of long grain rice?
A single grain of long grain rice typically weighs about 0.02 grams.
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.
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
What would a red terror count as in a tyranid army?
it would count as what you say it is at the start of the battle as long as it is a snakey thing e.g. a trygon or ravener
How long would it take to count a million dollars?
It depends on how long you count. (Taylor wrotee thiss) EMS! oct 15,2009 day before my birthday!
