Mass can identify molecules and atoms
Answer:
number of hydrates (H₂O ) = 6
Explanation:
Data Given:
moles of BaCl₂ = 0.0016
moles of H₂O = 0.0096
number of hydrates = ?
Solution:
As we have moles of BaCl₂ and H₂O water.
First find the simplest ratio of BaCl₂ and H₂O
Ratio BaCl₂ : H₂O
0.0016 : 0.0096
Now divide the ratio on smallest number to get simplest ratio
BaCl₂ : H₂O
0.0016 / 0.0016 : 0.0096 / 0.0016
1 : 6
So,
The ratio of BaCl₂ to water (H₂O) is 1 to 6. it means there are 6 water molecules are present.
The formula of hydrated Barium Chloride will be
BaCl₂. 6H₂O
So the number of hydrates will be 6
Answer:
Conversion factor is 6.022 ×10^23 molecules/mole.
Number of moles is 5.845 moles
Explanation:
We are given;
3.52 × 10^24 molecules
Required to determine the conversion factor\
We know that according to the Avogadro's constant;
1 mole of a compound contains 6.022 ×10^23 particles
Therefore, 1 mole of a molecular compound contains 6.022 ×10^23 molecules.
Thus, the conversion factor in this case would be 6.022 ×10^23 molecules/mole.
Such that; 3.52 × 10^24 molecules are equivalent to;
= 3.52 × 10^24 molecules ÷ 6.022 ×10^23 molecules/mole.
=5.845 moles
Thus, the conversion factor is 6.022 ×10^23 molecules/mole.
Number of moles is 5.845 moles
The number of silicon atoms in atypical computer chips(0.001g of silicon) is 2.14 × 10¹⁹ atoms
The atomic mass of silicon = 28.0855 amu
Using the mole concept that 1 mole = 6.022 × 10²³.
This number is called the Avogadro's number.
Therefore,
1 mole / 28.0855g of silicon contains 6.022 × 10²³ atoms of silicon
0.001 g will contain ? atoms of silicon
cross multiply
number of atoms of silicon = 6.022 × 10²³ × 0.001 / 28.0855
number of atoms of silicon = 6.022 × 10²⁰ / 28.0855
number of atoms of silicon = 2.14 × 10¹⁹ atoms
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