How many molecules of ascorbic acid(vitaminc,
c6h8 o6 )are in a 500 mg
tablet?

Explanation:

1) molar mass of the C6H8O6, you need to consult the atomic weight of the C, H and O atoms that are in the periodic table: C is 12; H is 1; O is 16 (12x6)+(1x8)+(16x6)= 176g/mol  176 g = 1 mol 0,5 g =  x mol                500mg= 0,5 grams  molar mass = mass÷ moles 176 = 0,5÷ x x= 2,84 x 10⁻³ mol  2) To find the number of molecules present in those 2,84 x 10⁻³ mol we need to multiple the moles by the Avogadro's constant No. of molecules = Avogadro's constant  x n° of moles No. of molecules = 6.022 x 10²³ x 2,84 x 10⁻³ = 1.71 x 10²¹ molecules of vit C.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.