will any one be my valentine find the eror in the sentace and be the valentine of the person wh said this

Complete this brønsted-lowry reaction placing each product by its appropriate label. hso4- + hcn

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

Describe the chemical reaction based on the chemical equation below. also, explain whether the equation is balanced.