1. El peso de un mol de cada uno de los siguientes compuestos (a) N2O; (b) NO; (c) NO2 es: (a)44g; (b) 30g; (c) 46g Falso ___ Verdadero

2. Las moles que hay en 453,6 g de cada uno de los compuestos en el problema anterior son: (a) 10,3 ; (b) 15,1 ; (c) 9,88. Falso ___ Verdadero

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has: