Choose the correct coefficients to balance the following equation:
__zn + __hcl > __zncl2 + __h2.
a) 1, 2, 2, 2
b) 1, 2, 1, 1
c) 2, 4, 2, 2
d) 0, 2, 0, 0

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom