CO is not an element because CO is a Compound. Elements contain One capital and one lowercase letter. While Compounds contain two or more capital letters.
Answer:
1.5 Molar solution in KCl
Explanation:
Definition of molarity => moles of solute / Volume of solution in Liters
Given 3.00 moles of solute dissolved in 2Liters of solution
Molarity of [KCl] = 3.00 moles KCl / 2Liters solution = 1.5 Molar solution in KCl
The correct answer is B) Double displacement.
This is because the Barium (Ba), which has a positive charge, got rearranged to bond with the carbonate (CO3), which has a negative charge. Also, the potassium (K), which has a positive charge, bonded with the chlorine (Cl), which has a negative charge.
It helps to remember that when there is a double replacement there are 4 elements/molecules in the reactants and 4 in the products that get rearranged.
Hope this helps!
That's actually a polyatomic Ion, so it's an Ionic bond, because Aluminum is a metal, and sulfate is a covalent compound.