Nitrogen makes up what percentage of the mass of the human body

Which runner has greater kinetic energy: a 46-kilogram runner moving at a speed of 8 meters per second or a 92-kilogram runner moving at a speed of 4 meters per second? What is the amount of the runner's kinetic energy in Joules?

Why sodium chloride is a neutral compound even though it is made up of ions that have positive and negative charges?

Suppose 2.57g of nickel (II) chloride is dissolved in 350. mL of a 38.0mM aqueous solution of potassium carbonate. Calculate the final molarity of nickel (II) cation in the solution.

Place the following substances in the following order: soluble, somewhat soluble, and insoluble. A. sand, sugar, cornstarch B. sand, cornstarch, sugar C. sugar, cornstarch, sand D. sugar, sand, cornstarch

Discuss the uses and economic value of the mineral. Estimate south africa's global reserves and production of thise mineral

An animal that backs on a warm rock during the morning hours but retreats to the shade of the rocks during the middle of the day is mostly likely a (n) A. ectotherm B. endotherm C. vertebrate D. chordate

How much water vapor can a cubic meter of air hold at 25 degrees celcius

When 0.50 L of a 12 M solution is diluted to 1.0 L, what is the resulting molarity?

A 52.9g sample of brass, which has a specific heat capacity of 0.375·J·g-1°C-1, is put into a calorimeter (see sketch at right) that contains 100.0g of water. The temperature of the water starts off at 15.0°C.

What is the concentration of 10.00 mL of HBr if it takes 16.73 mL of a 0.253 M LiOH solution to neutralize it?