CHEMISTRY MIDDLE SCHOOL

what might happen in a tropical rainforest biome if the area received very little rain for an extended period of time

Answers

Answer 1
Answer: plants and animals would die
Answer 2
Answer:

Answer:

The forest will become very dry and things that need water will die

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True or false in general, winds are named for the direction from which they blow True
False

Answers

Answer:

it is true because there is west,south and etc

Which is an example of a non aqueous solution gasoline
fog
mayonnaise
fruit juice

Answers

Answer: gasoline

Explanation:

An aqueous solution is one which contains water as a solvent. A non- aqueous solution is the one in which the solvent of the solution is a liquid but it is not water.

Among the options given, gasoline is the correct option. This is because of the fact that gasoline is a crude oil which does not include water as an ingredient.

You leave a piece of bread outside for a few days. It forms green and blue mold. It smells awful. A chemical change has occurred - true or falseexplain you answer stating facts that support your answer.

Answers

Answer:

False

Explanation:

It is not a chemical change, it is a physical change because the molecules of the bread didn't  change, the form of the bread did

Air is a mixture whereas water is a compound explain

Answers

Answer:

Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present. Example: Air

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water H_2O

Air is a mixture of various gases , dust particles and water vapors which do not react chemically and thus the constituents retain their chemical properties. Water is a compound which is formed by chemical combination of hydrogen and oxygen which lose their individual chemical properties.
Air is a mixture as in it has different types of gases mixed in the air such as Nitrogen, Oxygen, and Carbon Dioxide, but none of these are bonded or fused together. Water is a compound of 1 Oxygen and 2 Hydrogen molecules bonded together, as in permanently together. You can think of Air as a bowl of trail mix, everything in there is separable, and a compound as in something inseparable (Unless done using scientific methods). 

What is nitrogen state at 20 celcius

Answers

Hi there, I believe that nitrogen turns into a liquid at 20 degrees Celsius. Thererore, the nitrogen state is liquid.

Given the balanced equation representing a reaction:Al2(SO4)3 +6NaOH ==> 2Al(OH)3 + 3Na2SO4

The mole ratio of NaOH to Al(OH)3 is

(1) 1:1 (2) 3:1

(3) 1:3 (4) 3:7

Answers

The answer is number 2. 3:1. This is the simplified value of 6:2 which came from 6NaOH:2Al(OH)3. The original ratio is 6:2 but it can be simplified through dividing it each by 2. So 6 divided by 2 equals to 3 and 2 divided by 2 is 1. Therefore the simplified ratio is 3:1.
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In July, the average temperature in one US city was 29°C. By December, the average temperature had fallen by 29°C. Explain why the average temperature in December was 0°C.