As winter approaches, temperatures begin to drop. The days grow shorter, and squirrels are seen gathering nuts and burying them. Birds fly in flocks toward the south, but some animals, like mountain hares, do not mind the cold and instead adapt by turning their fur white. Some insects, like the morning cloak butterfly, seek shelter in tree holes or other shelters. Then, when temperatures slowly climb back up, many animals return to their homes and come out of hiding. Which of the following is the main external stimulus in the passage?

A.
The changing seasons
B.
The animals leaving
C.
The animals hiding
D.
The diversity of animals

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

the answers would be

the first one and the second one

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them