Answer:
iconic bonded unit
polyatomic ions can be covalently bonded
it has cations and anions
Answer:
D equal numbers of protons and electrons
Explanation:
An atom of an element will always contain equal number of protons and electrons.
Atoms are electrically neutral because the number of positive charges and negative charges within them are always equal.
- An atom is the smallest indivisible particles of an element that takes part in a chemical reaction.
- The positively charged particles within an atom are the protons.
- The negatively charged particles within an atom are the electrons.
For;
So number of protons = number of electrons within an atom.
Answer:
The volume of stock solution needed to make the solution is 1875 ml
Explanation:
The parameters given are;
The volume of 75 M solution of H₂SO₄ = 400 ml
The concentration of stock solution = 16.0 M
Number moles per liter of stock solution = 16 moles
Number of moles in required 400 ml solution = 0.4×75 = 30 M
Volume of stock solution that contains 30 M = 30/16×1 = 1.875 l
The volume of stock solution that is required = 1875 ml
