How many valence electrons does bromine have

Calculate the energy in joules to heat 828 g of mercury from 37.0◦ C to 42.0◦ C. The specific heat capacity of Hg (ℓ) is 0.139 J/g· ◦C. Answer in units of joules.

Which statement best describes the conductivity of weak electrolytes, such as weak acids and bases? A) Weak electrolytes do not dissolve in water and can not conduct electricity.

Use the periodic table to determine the electron configuration for Cl and Y in noble-gas notation. Cl:

Write a lewis structure for the co2-3 ion. how many equivalent resonance structures can be drawn?

How are hail and snow similar? A. They are solid precipitation that forms in clouds at or below freezing temperatures. B. They are liquid precipitation that forms at or above freezing temperatures. C.

If the bond enthalpy for a C-C bond is 348 kJ, what will happen when the C-C bond is formed?

How do you find moles

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?