What is oxidized and what is reduced in this reaction?

N2H4 (l) + 2H2O2 (l) → N2 (g) + 4H2O (g)

N is reduced and H is oxidized.

N is reduced and O is oxidized.

N is oxidized and O is reduced.

N is oxidized and H is reduced.

If you are given only the mass number of neutrons, how do we find an atomic number?

Chromosomes contain genes, if a person has an incomplete chromosome what would he or she be missing?

How many molecules are in 0.26 mol of CO2

What kind of compound has two atoms in it

When might a technique called water displacement be used?

What would you measure a cooking pot by

Is pancakes cooking on a griddle a physical or chemical change?

To determine whether a shiny gold-colored rock is actually gold, a chemistry student decides to measure its heat capacity. She first weighs the rock and finds that it has a mass of 4.7 g. She then finds that, upon absorption of 52.

In most Acid-base reactions, what type of bond (ionic or covalent) is formed between the ions of the "salt"? What happens to the electrons in this sort of bond? Are they transferred, or shared?

Many trials are not needed before a hypothesis can be accepted