He used different items. He should have used one item in different colors. For example, a red wool sock, a green wool sock, and a black wool sock.
Answer:
D. Na2O
Because we already know that sodium oxide is a binary ionic compound because it contains one metal cation and one non-metal anion.
Both mile and yard are units of distance thus they are inter convertible.
Distance covered in a marathon is 26.2 miles.
Since, 1 mile=1760 yards
Thus, distance can be converted into yards using the following conversion factor:

Thus, distance covered in marathon in yard will be:

Therefore, distance of the race is 46112 yards.
Answer:
Explanation:
CuCO3(s) ====> Cu(ii)O(s) + CO2(g)
Nothing else needs to be done. The equation is balanced.
From the choices presented above, I can say the correct answer is option D. The reaction that falls under the formation reaction type is <span>6C(graphite) + 6H2O(s) → C6H12O6(s). This is because the reactants combine and form only one single large product.</span>