Which of these is a base a) vinegar b) ammonia c)hcl d)hno3

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Find the mass, in grams, of 5.00*10^23 molecules of f2

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !