A helium atom has 2 protons and 2 neutrons. what is the mass number of this atom?

Select the answers below that represent the ionic compounds in this list: na2so4 h2so4 ch3-ch3 n2o4 cacl2 ca3 (po4) 2

Why is the periodic table called the periodic table

What kind of reaction is AgNO3+KI - > AgI+KNO3?

6 C (s) + 3 H2 (g) → 2 C6H6 (l) Δ H = 49 kJ TRUE or FALSE

As carbon dioxide sublimes, its entropy (1) decreases (2) increases (3) remains the same

What is solubility? 1) solubility is how much solute will precipitate out of solvent 2) solubility is how much solvent will dissolve in solute 3) solubility is how much solid only will dissolve in liquid only

Is burning of coal a reversible change? If yes how?

How many grams of tin are found in 3.5 moles of tin

Determine whether each statement is a description of a physical property or a chemical property. Paper burns readily in air.

Cual es la función de los lípidos?