Identify ionic bonds and no polar covalent/polar covalent bonds. How do I find the electro negativity of this?

1. Iron (II) sulfide reacts with oxygen to form iron (III) oxide and sulfur dioxide
FeS + 02 —> Fe2O3 + SO2

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

The reaction q+r2=r2q is found to be first order in r2 and

In pea plants, the allele for tallness (t) is dominant to the allele for shortness (t). in the cross between a tall pea plant and a short pea plant shown below, what is the probability that the resulting offspring will be tall? whats the percent