Well accounting google,
Chemists generally use the mole as the unit for the number of atoms or molecules of a material. One mole (abbreviated mol) is equal to 6.022×1023 molecular entities (Avogadro's number), and each element has a different molar mass depending on the weight of 6.022×1023 of its atoms (1 mole).
Answer:
37.64 × 10²³ atoms
Explanation:
Given data:
Number of atoms = ?
Mass of sulfur = 200.0 g
Solution:
First of all we will calculate the number of moles of sulfur.
Number of moles = mass/molar mass
Number of moles = 200.0 g/ 32 g/mol
Number of moles = 6.25 mol
Number of atoms:
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.
1 mole = 6.022 × 10²³ atoms
6.25 mol × 6.022 × 10²³ atoms / 1mol
37.64 × 10²³ atoms
13.6
a) yes Pb is more reactive that Ag, Pb before Ag
b) no, Cu after H
c) yes, Cl2 is more active than I2
4) yes, Mg is more active
13.7 (as I think)
Al ³⁺ more active than Zn²⁺, Mn can react with Zn²⁺, but not with Al ³⁺ , because Mn after Al but before Zn
Answer:
A.The sound becomes louder.
And
C.The sound waves get further.
Explanation:
Louder the sound it will travel long.
