A 25.3g sample of an unknown compound contains 0.80g of oxygen. What is the percent by mass of oxygen in the compound?

What is the mass of 0.46 mol of mgcl2

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?

Areader can tell that the meaning of “obnoxious” will include “having the quality of something” because of the .a) prefix b)pronunciation c)suffix d) word root