<span>Answer: B. Ionic solids have higher melting points than molecular solids.
</span>
This is because the rest are false, as solids are able to melt, and do have melting points. Also, not all solids have the same melting points.
Yes, it's changing the appearance of the metal caused by rain, salt, or acid
<h2>Answer:</h2>
pOH = 4.6
<h2>Explanations:</h2>
The sum of pH and pOH of a solution is 14as shown:

Given the following parameter
pH = 9.4
Substitute the given parameters into the formula to have:

Hence the pOH of the solution of pH of 9.4 is 4.6
Bike is B
Horn is H
Tire is T
Chain is C
one bike would be B = H + 2T + C
you would have to multiply both sides by 4 to make 4 bikes, so then it would be
4B = 4H + 8T + 4C