Based on the given bond energies, what is the enthalpy change for the chemical reaction? A. -352 kj

B. -210 kj

C. -176 kj

D. -105 kj

What would happen to the tides if there was no moon and no sun in the sky?

Why do we have so many wars in the us

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a researcher conducts a comparison of the comments made in a publicly available blog and the blogger's comments on a similar topic in a weekly magazine. undergraduate students in a field methods class are assigned a research question and asked to interview another classmate, to be followed by a class discussion on interview techniques. a cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors. a researcher sets up a meeting with the superintendent of a large and diverse public school system to get data about the ethnic composition of the school system and the number of students receiving free lunches.