What is the purpose of the zigzag line on a periodic table

When both the speed and direction of an object's motion is known, what else is known? the distance the object has traveled the velocity of the object the acceleration of the object the average speed of the object

What are some observable indications that a chemical reaction has occurred?

Which part of the eye controls whether or not the pupil dilates or constricts? A. Cornea B. Optic nerve C. Retina D. Iris

Treatment of 2-hexanone with naoch2ch3 followed by ch3br affords compound x (c7h14o) as the major product. x shows a strong absorption in the ir spectrum at 1713 cm-1, and its 1h nmr data is given below. what is the structure of x?

What is the value of in a spontaneous reaction?

How to find thr solute and solvent

Which process uses a volume of solution of known concentration to determine the concentration of another solution? (1) distillation (3) transmutation (2) substitution (4) titration

How could weathering by release of pressure affect the amount of weathering by freezing and thawing?

What are the major water reservoirs of the world?

Name four elements that have properties similar to chlorine