∆H value in an endothermic reaction is a positive number.

A) True
B) False

Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory

Read "who built the pyramids? ”. leave this link open while you answer the questions throughout the assignment. give at least two reasons why some people claim the pyramids of giza were constructed by aliens.

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2