Mg + 2HCl --> MgCl2 + H2 Which is the limiting reactant if you are given 3.00 grams of magnesium and 4.00 grams of HCl?
How many grams of hydrogen gas will be produced from the reaction of 3.00 g of magnesium with 4.00 grams of hydrochloric acid?

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

Which of these conditions most likely produces an unstable isotope?

Which of the following are correct values for the ideal gas laws constant r