Answer:
There are four ways to find the charge of an element:
Use the periodic table. The usual charge of an element is common to its group. ...
Use a chart. ...
For a single atom, the charge is the number of protons minus the number of electrons.
Find the charge by balancing charge in a compound
This the answer have a good day
External fertilization in animals usually occurs in water or in damp areas in a process called spawning.
The two most abundant are coal and forests
Answer:
0.66 × 10⁴² mol
Explanation:
Given data:
Moles of water = ?
Number of molecules of water = 3.99× 10⁶⁵ molecules
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,
1 mole = 6.022 × 10²³ molecules of water
3.99× 10⁶⁵ molecules × 1 mol / 6.022 × 10²³ molecules
0.66 × 10⁴² mol
