3. Determine if the following compounds are formula units or molecules
A. NO₂
B. CO2
C. MgCl2

How many grams of aluminum will there be in 98g of al2o3?

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:

Answer asap need by wednesday morning calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 best answer will be brainliest