How many grams of Br contain 8.94 * 1021 atoms of atomic bromine?

Is Be2 + stable or unstable?

How many moles of silver atoms are in 1.8 à - 10^20 atoms of silver? a) 3.0 à - 10^2 b) 1.1 à - 10^44 c) 3.3 à - 10^â€"3 d) 3.0 à - 10^â€"4

Write the symbol for the element which has the smallest atomic radius. c, al, li, ne.

Which of the following has the lowest entropy? A: H2O (I) B: H2O (s) C: H2O (g) D: O2 (g)

How many grams of naoh are needed to prepare 500 ml of 0.125 m naoh?

What volume of 0.500 M AgNO3 are needed to react with 100. mL of 0.400 M K2CrO4? 2 AgNO3 (aq) + K2CrO4 (aq) ➔ Ag2CrO4 (s) + 2 KNO3 (aq)

Nonpolar substances do not dissolve in polar solvents like water. If you're conducting an investigation to test the solubility of different substances, which on these substances do you expect to be insoluble in water? A. ammonia (NH3) B.

You mix together two different substances. There is a loud noise, and a burst of flame. Which of the following is most likely to be true?

Definition of a delocalised electron

How are the components of the electromagnetic spectrum, from radio waves to gamma rays, grouped? Group of answer choices according to their wavelength according to their speed according to their visibility according to their velocity