I believe <span>Na2SO3 is the solution to the problem.</span>
A covalent compound is formed when a chemical reaction occurs between atoms of separate molecules
The given reaction is,

In this reaction, the positive and negative ions of both the reactants rearrange resulting in the formation of new compounds. Such a reaction is referred to as the double replacement or the double displacement reaction. These type of reactions usually take place in aqueous medium and one of the products is a precipitate.
Double displacement reactions are of three types, precipitation reaction, neutralization reaction and reaction involving the formation of a gas. The given reaction is a precipitation reaction as one of the products is a solid.
The answer is actually 13 you divide 55 miles by the hours to get 12.9 which you round to 13
Answer:
Regulatory
Explanation:
The rectangular sign with longer vertical dimension and have white background are called regulatory signs. Regulatory signs are those signals which are used to indicate or reinforce traffic laws. These regulatory sign informs the driver and tell them to apply the traffic law at certain required places is your answer .-.