What happens to water when it changes to ice?

Its density increases.

Its density decreases.

Its mass increases.

Its mass decreases.

Its volume increases.

Its volume decreases.

How many valence electrons does the neutral Mg atom have?

At sea level, water boils at 100 degrees celcius and methane boiled at - 161 degrees celcius. which of these substances has a stronger force of attraction between its particles? explain your answer

In the following table, all the columns for the element oxygen are filled out correctly. Element Electron Structure of Atom Electron Structure of Ion Net Ionic Charge Oxygen 1s2, 2s2, 2p4 1s2, 2s2, 2p6 - 2 True False

What does it mean to simplify the equation in chemicals

Why is a chemical indicator added to the flask in which a titration will occur? A to show when enough base has been added B to determine the starting pH of the solution C to neutralize the acid before adding the base D to identify the starting

Determine the name of the compound Li2O

Complete the reactions to show how butanoic acid may be converted to phenyl propyl ketone.

As a sample of the radioactive isotope 131I decays, its half-life (1) decreases (2) increases (3) remains the same

How many Joules of energy are required to change 10.0 gram of ice at - 2.0 C to water at 20.0 C? (use your constants) 440 J 66,000 J 880 4220 J

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary