MOLES

Topics: Chemical element, Water, Mathematics Pages: 2 (329 words) Published: October 22, 2013
Table 1: Counting Particles in common substances

Unit

Table 2: Counting Particles in common items

Unit

Zn
(Zinc)

1.61

65.390

0.0246
Zn= 0.0246
#Zn= 1.481 x 1022
Analysis Questions:

1. For each table, which sample had the largest number of particles? For table 1, sucrose has the largest number of particles, and for table 2, sand has the largest number of particles.

2. In each case, did the substances with the highest number of particles have the highest number of atoms? Explain! The substance that has the highest number of particles has the lowest number of atoms, which means that in comparing both table, sucrose has a low number of atoms in the compound having to get the most out of the particles unlike carbon which is only one but since its pure element has a low mass it will have a low amount so the heaviest substance but that has a low number atoms has the most number of atoms in the substance.

3. In each case, did the substances with the highest mass have the highest number of particles? Explain! Yes, since sand is the heaviest in comparing to both tables and has the highest amount of particles, sucrose is also the heaviest in table 1 having similar proportions that a large mass can result in having a high amount of particles.

4. Based on your calculations, what is the ‘mass of water per teaspoon’? What type of unit is this? How can this information then be used to calculate number of particles in other volumes of water? The mass of water per teaspoon is 5mL, in which is 18.013 g/mol. This information can be used to calculate other volumes of water by having to multiply it by the number of moles.

5. Calculate the number of nickel atoms in a 5-cent coin of mass 0.942g if it was made of an alloy...
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