How many moles are equal to 2.09 x 10-7 atoms of Sodium?

Convert the volume 0.455 m3 to the unit mL

The grooves or folds of the brain are called

Cabbage Juice pH Chart pH Color 2 Red 4 Purple 6 Violet 8 Blue 10 Blue-Green 12 Green The juice from red cabbage is a well known pH indicator solution.

a ballon filled with helium contains 85L and 1.2 atm. the pressure is reduced to 0.22 atm at constant temperature. what is the new volume? given info: equation. work: answer

The doctor knows that people taking the medicine may sleep better just because they expect the medicine to work. How can he be sure of whether the medicine really works?

What is solubility? 1) solubility is how much solute will precipitate out of solvent 2) solubility is how much solvent will dissolve in solute 3) solubility is how much solid only will dissolve in liquid only

Is burning of coal a reversible change? If yes how?

How many grams of tin are found in 3.5 moles of tin

Determine whether each statement is a description of a physical property or a chemical property. Paper burns readily in air.

Cual es la función de los lípidos?