Answer:
The question is incomplete.(not enough data provided).
Explanation:
Universal pH paper turns red if it is very strongly acidic, turns orange if it is strongly acidic, turns yellow if it is weakly acidic, green if it is weakly alkali and blue if it is strongly alkali.
Solution A will turn orange as it is strongly acidic
Solution B will turn blue as it is strongly alkali
Solution C will turn yellowish green as it is neutral
Sugar dissolving in warm water because when the sugar dissolves you can get the sugar back by letting the water evaporate.,
Answer:
Mass = 4.5 g
Explanation:
Given data:
Number of atoms of iron = 4.85 ×10²² atoms
Mass of iron = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
4.85 × 10²² atoms of iron / 6.022 × 10²³ atoms × 1 mol
0.081 mol
Mass of iron:
Mass = number of moles × molar mass
Mass = 0.081 mol × 55.85 g/mol
Mass = 4.5 g
