How many significant figures are in 23.479

What is the total mass of Kr-42 remaining in a 20-mg sample after 48.8 hours? (1) 2.5 mg (2) 5.0 mg (3) 10 mg 4) 20 mg

In the figure, angle E measures 54° and angle G measures 29º. What is the measurement of angle H? A 25° B. 34° oc. 97° D. 126

A cell with a concentration of 1.5% nacl is immersed in a solution with a concentration of 5.5% nacl. what will happen to the cell after being immersed in the solution for many hours?

Which of the following states that no more than two electrons can occupy an atomic orbital and that two electrons in the same orbital must have opposite spins? a. Hund's rule b. Dalton's theory c. the Aufbau principle d.

Which phenomena naturally warms earth lower atmosphere and surface?

Why is it important for us to study outer space?

What is the correct noble gas configuration of chlorine

A flask of fixed volume contains 1.00 mole of gaseous carbon dioxide and 88.0 g of solid carbon dioxide. the original pressure and temperature in the flask is 1.00 atm and 300. k. all of the solid carbon dioxide sublimes.

Oxygen is in group 16 of the periodic table. An oxygen ion (O2-) has a charge of - 2. Which of the following would be most likely to combine with an oxygen ion to form a new compound?

How and why - Why does ice float on water