Answer:
the valency of oxygen is -2
Number of valence electrons
Answer:
Heat is not something that can be contained since it is not a tangible thing. Heat is a process
Explanation:
Answer:
continental polar air masses
Explanation:
forms over Canada, move down from North Pole, bring bitterly cold and dry air to the northern United States during the winter.
Answer:
0.9 mol/L.
Explanation:
- Molarity is defined as <em>the number of moles of solute in a 1.0 L of the solution.</em>
- It can be expressed as: <em>M = n / V(L)</em>
M is the molarity of the solution <em>(mol/L)</em>,
n is the number of moles of solute <em>(n = 4.5 moles)</em>,
V is the volume of the solution <em>(V = 500 ml = 0.5 L)</em>.
- ∴ The molarity of the solution (M) = n / V = (4.5 mol) / (0.5 L) = 0.9 mol/L.
