What temperature in Kelvin would 5.0 moles of gas need to be in order to get the gas pressure in a 2.0 L vessel to 1000 Kpa?

Find the mass in grams of hydrogen gas produced when 14.0 moles of hcl is added to an excess amount of magnesium.

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Based on its chemical properties, identify the position of each chemical family on the periodic table.