How many particles would be found in a 1.224 g sample of k2o

7.8286×10²¹ particles.

Explanation:

First we need to calculate the total molar mass of the compound, in this case:

Potassium (K) = 39.1 g/mol × 2 =  78.2 +

Oxigen (O)     =     16 g/mol × 1  =    16  

                                Total(K₂O) = 94.2 g/mol

Then, we calculate the number of moles of the compound in the sample, this is done dividing de mass of the sample by the molar mass:

mol = 0.013 moles in our sample.

Finally, we calculate the total number of particles. The costant known as Avogadro number (6.022×10²³) is the number of particles or atoms contained in a mole of any substance. We need to multiply the number of moles by the Avogadro number.

particles = 0.013 mol × (6.022×10²³  particles/mol) = 7.8286×10²¹ particles.

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.