Given the following equation: 2AI + 6HCI = 2AICI3 + 3H2 if 3.00 grams of H2 were produced, how many grams of Ai reacted? (Note: The molar mass of AI = 26.98 g/mol, and molar mass of H2 = 2.016 g/mol.

Three sig figures, please.

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

Compare and contrast the bohr model and the electron cloud models of the atom.

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent