What is a public service announcement?
a. it is a short dialogue stating personal opinions.
b. it is a lengthy descriptive narrative about an event.
c. it is a free commercial for a nonprofit organization.
d. it is pitch to consumers to purchase a new product.

after balancing the chemical equation, what are the coefficients for these compounds?

h2s      

⇒ 3

hno3    

⇒ 2

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