CHEMISTRY MIDDLE SCHOOL

Why does air have different pressures

Answers

Answer 1
Answer:  Because, at lower elevation, everything is tightly packed, and theres more air. As for at higher elevation (like for example at the top of mount everest) There is less air... The higher the elevation, the less air. 
~Hope this helped! :)

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How to revise in just 1 whole day for chemistry combined science is it possible to get a good grade

Answers

it will be hard, but you can do it. Just study given the materials for the course. Understand enthalpy and entropy, and various types of bonding and you'll be fine.

To test a hypothesis,a scientist designs a (n)------

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To test a hypothesis, a scientist designs a (n)_experiment(s) _
Experiment. That is the answer.

How are elements identifies in terms of their atoms?

Answers

they are identified by the number of protons they have in the nucleus which = their electrons. 
protons,neutrons,electrones,mass number and model are a few.
i hope this helped

QUICK !! No explanation needed !!!Heat could best be transferred by conduction between
A.) A candle and the air
B.) An oven and a glass dish .
C.) A stove and a copper pot .
D.) water and a wooden spoon .

Answers

C.) A stove and a copper pot

C is the answer, because the heat is being transferred by two objects touching which it is conduction and it is the best way heat is transferred

Hope this helped

The coefficients in a balanced chemical equation represent(l ) the mass ratios of the substances in the reaction
(2) the mole ratios of the substances in the reaction
(3) the total number of electrons in the reaction
(4) the total number of elements in the reaction

Answers

The coefficients in a balanced chemical equation represent: (2) the mole ratios of the substances in the reaction.

What is a balanced chemical equation?

A balanced chemical equation refers to an equation in which the number of atoms present on the reactant side (left) is the same or equal to the number of atoms present on the product side (right) of a chemical equation.

What is a coefficient?

A coefficient can be defined as a number that is placed in front of a chemical symbol (formula) of an element or chemical compound in a chemical equation.

  • In a balanced chemical equation, the coefficients represent the mole ratios of the substances (element or chemical compound) in a chemical reaction.

Read more on coefficient here: brainly.com/question/8637549
(l ) the mass ratios of the substances in the reaction
(2) the mole ratios of the substances in the reaction
(3) the total number of electrons in the reaction
(4) the total number of elements in the reaction

Aaron is visiting a national park in Pennsylvania. The ranger tells Aaron that he is unlikely to see any groundhogs because it is winter.Which of the following is the most likely reason Aaron would NOT see any groundhogs?

The groundhogs are hibernating.

The groundhogs migrated.

The groundhogs have died out.

The groundhogs are gathering food.

Answers

Answer:

The groundhogs are hibernating.

Explanation:

Groundhogs hibernate during the winter months and don't come out of their burrows.
The groundhogs are hibernating, during winter
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