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4 years ago

Make a list of solid mixtures in your classroom?

Chemistry

2 answers:

Nutka1998 [239]4 years ago

6 0

Desks chairs whiteboard or chalkboard table

galben [10]4 years ago

5 0

Solid mixtures in a classroom consists of desks,chairs,blackboards, etc. Look at it like every solid thing in your classroom is a mixture. That is the easiest way to solve this problem.

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What are the units for:<br> wavelength<br> frequency<br> energy

Oliga [24]

Answer:

wavelength.. meter

frequency.... Hertz (cycle per second)

energy.... Joule

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3 years ago

Seth used this model to show how water vapor becomes a liquid in the water cycle. Which part of the water cycle is he modeling?

IRISSAK [1]

Answer: He is modeling the condensation process in the water cycle.

6 0

3 years ago

Which of the following describes an exothermic reaction?

sattari [20]

Answer:

The answer to your question is: second option.

Explanation:

An exothermic reaction is a reaction that releases energy to the environment.

Thermal energy is absorbed by the system. This sentence is describing an endothermic reaction.

Thermal energy is absorbed by the surroundings. This sentence is describing an exothermic reaction.

Thermal energy is not transferred. This sentence is describing an isolated system.

The initial and final temperatures of the system remains the same. This option is incorrect is not describing an exothermic reaction.

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4 years ago

Balance the following equation<br>Al + O₂ - ALO₃

baherus [9]

Answer:

2Al + 3O₂ ===> 2ALO₃

Explanation:

2Al + 3O₂ ===> 2ALO₃

6 0

4 years ago

Read 2 more answers

what is the total mass of water formed when 8 grams of hydrogen completely reacts with 64 grams oxygen

Daniel [21]

Question: Given the balanced equation representing a reaction:

2H2 + O2 ==>2H2O

What is the total mass of water formed when 8 grams of hydrogen reacts completely with 64 grams of oxygen?

(1) 18 g (3) 56 g

(2) 36 g (4) 72 g

Answer:

"72 gram" is the total mass of water formed when 8 grams of hydrogen reacts completely with 64 grams of oxygen

Explanation:

We will do stoichiometry in this kind of problem:

$8g of H_2O\times(\frac{1molO_2}{2.0g H_2})(\frac{2 mol H_2O}{2mol H_2})(\frac{18g H_2O}{1molH_2O}) = 72g H_2O$

$64 g O_2 \times (\frac{1molO_2}{32g O_2})(\frac{2 mol H_2O}{1mol O_2})(\frac{16gH_2O}{1 mol H_2O}) = 72g H_2O$

Therefore, the total mass of water formed is 72 g.

7 0

3 years ago