Take the atomic mass of silicon and put it over one. Then set that equal to x over 4.8 x 1026. X will equal to the weight of silicon in grams.
Answer:
96.32 %
Explanation:
Given that:
The solubility of compound in hot water = 4.35 g / 100 mL
The solubility of compound in cold water = 0.16 g / 100 mL
Which means that in 100 mL of hot water, the dissolved compound is 4.35 g and in cold water, the dissolved compound is 0.16 g
Hence, on transition, compound that will catalyze is 4.35 - 0.16 g = 4.19 g
So,

Percent recovery for re-crystallization of this compound from water= 96.32 %
Answer:
59.42 ×10²³ formula units
Explanation:
Given data:
Number of moles of NH4NO3 = 9.87 mol
Number of formula units = ?
Formula:
Number of formula units = moles × Avogadro number
Solution:
Avogadro number = 6.02×10²³
Number of formula units = 9.87 × 6.02 ×10²³
Number of formula units = 59.42 ×10²³ formula units
The ammonium has a positive charge