In 1 gram of any substance, the number of particles can vary depending on the substance's molecular weight and Avogadro's number. To calculate the number of particles, you would first need to determine the molar mass of the substance in grams per mole. Then, you would use Avogadro's number, which is approximately 6.022 x 10^23 particles per mole, to find the number of particles in 1 gram of the substance.
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Depends on what the particles are. The number would be 1/w where w is the average weight of one such particle.
That depends on how coarse the sand is.
It depends on 1 gram of what.
1 gram = 1,000 milligrams
1 gram = 100 centigrams
1000 milligrams in 1 gram