Oxygen gas is a:

A. substance
B. heterogeneous mixture
C. homogenous mixture

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?