7) Given that 4 NH3 + 5 02- 4 NO + 6 H20, if 3.00 mol NH3 were made to react with excess of oxygen gas, the amount of H20 formed would be:
A) 2.00 mol.
B) 3.00 mol.
C) 4.50 mol.
36.00 mol.
E) none of the above

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

There are main groups in the modern periodic table of elements

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.