Which phase change at standard temperature and pressure represents sublimation? [ASSET]

(a) CO2 (s)  CO2 (g)

(b) H2O (l)  H2O (g)

(c) CO2 (l)  CO2 (g)

(d) H2O (s)  H2O (l)

Note: Moles to grams, or grams to moles you will need to use molar mass (g/mol). 1) How many moles are in 20.2 g HCl? 2) How many grams are in 2 moles of HCl? Note: When converting from moles to molecules, you need the following: 1 mole = 6.

How many carbon atoms are there in a diamond (pure carbon) with a mass of 55 mg?

What type of chemical reaction is 2h202 (1) to 2h20 (1) + 02 (g)

Which of the following best defines an acid? An acid has a pH of 7. An acid has hydroxide ions. An acid has fewer positive ions in solution. An acid has more hydrogen ions in solution.

Which describes a step in the process of forming an ionic bond? A.) A metal atom loses electrons and becomes a positive ion. B.) A metal atom gains electrons and becomes a negative ion. C.) A nonmetal atom loses electrons and becomes a negative ion.

How does the molecular count support the idea of a nucleotide as a subunit

Explain how will you know the mass of the water in your experiment?

Convert 5 moles H2O to liters

How many moles of sulfur atoms are in 2.408 x 10^24 atoms sulfur?

According to Rutherford, what does the nucleus contain?