A reaction which needs to gives off energy to complete the chemical reactions is called an

A) adiabatic reaction.

B) oxidation reaction.

C) exothermic reaction.

D) endothermic reaction.

How does the small size of the hydrogen atom contribute?

Why do alkaline earth metals always form 2 + ions

Elemental analysis of a compound, once used as a pesticide, was found to be 74.2% carbon, 8.64% hydrogen, and 17.2% nitrogen. What is the empirical formula of this compound?

Does the bowling ball have more potential energy or kinetic energy just before it hits the ground? Why?

What is the pH of a 1.4 M pyridine solution that has Kb = 1.7 * 10-9? The equation for the dissociation of pyridine is C5H5N (aq) + H2O (l) ⇌ C5H5NH + (aq) + OH - (aq). What is the pH of a 1.4 M pyridine solution that has Kb = 1.

According to the article, HOW has the discovery of the Mimivirus influenced scientists' ideas about viruses? А Since it acts differently than other viruses, scientists think it could lead to a vaccine for cancer B.

Consider the two electron arrangements for neutral atoms A and B. Are atoms A and B the same element? A - 1s2, 2s2, 2p6, 3s1 B - 1s2, 2s2, 2p6, 5s1 yes or no

Match the following terms to their correct examples Conduction Convection Radiation Water warming on a stove The sun warming the earth A spoon resting in a cup of tea gets hot

Why are 3 ammonium groups needed for every 1 nitride ion?

How do you explain the relativity high conductivity of tap water compared to a low or zero conductivity for distilled water