What is the order, from simplest to most complex, for the classification of matter

Answers

Answer 1

Answer:

B) element, molecule, compound, mixture is the answer just took the test ;) good luck : P

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Describe one of the major differences between oceanic crust and continental crust.

Answers

i think oceanic crust occur inside ocean &
continental crust occurs inside continent

An industrial chemist is studying a sample of an unknown metal. Describe two ways he could change the metal physically and two ways he could change the metal chemically to try to identify it.

Answers

Answer:idk what they cpuld do but we can say this is the right answer :))))

Explanation:

I need PoInTs

You could write about anything. Some examples you might include are the following:

Heat the metal until it melts (physical change).
Attempt to react the metal with oxygen (chemical change).
Stretch the metal into a wire (physical change).
Attempt to react the metal with acid (chemical change).

Choose the pieces of evidence that supported the existence of Pangaea and continental drift theory.o Fossilized plants and animals of the same species found on separate continents.
o Geological features, such as mountain ranges, that align on matching coasts of different continents.
o Island arc ranges are still connected under the Atlantic Ocean.
o Antarctica's glacial features are similar to the Arctic's.

Answers

Pangaea is scientifically known as the original whole mass of land that eventually was divided into separate mass entities called continents as a result to natural phenomena like earthquakes. This is more explained inthe continental drift theory. After rigorous collection of evidences, scientists noticed that fossilized plants and animals of the same species, also with the coastlines match on different continents. The answers are the first and second choices (A and B).

Fossilized plants and animals of the same species found on separate continents.

Geological features, such as mountain ranges, that align on matching coasts of different continents.

Which word equation shows lithium oxide being formed from the reaction between oxygen and lithium?1.)oxygen + lithium oxide to lithium

2.)lithium + oxygen to lithium oxide

3.)oxygen + lithium to lithium + oxide

4.)lithium oxide to lithium + oxygen

Answers

The correct answer is the second option. The wordequation that would represent the formation of lithium oxide from lithium metal and oxygen is:

lithium + oxygen to lithium oxide

Inchemical symbols, the balanced chemical equation is expressed as:

Li + O2 = Li2O

Answer : The correct option is, (2) lithium + oxygen to lithium oxide

Explanation :

When the lithium react with the oxygen to give lithium oxide as a product.

The balanced chemical reaction will be,

$2Li+O_2\rightarrow Li_2O$

This reaction can be represented in words as,

Lithium react with oxygen to give lithium oxide.

or,

lithium + oxygen to lithium oxide

Hence, the correct option is, (2) lithium + oxygen to lithium oxide

What does 1 amu equal to

Answers

1 atomic mass unit =1.66053904 × 10-27 kilograms
An atomic mass unit is equal to one-twelfth the mass of one Carbon-12 atom.

*Hope that helps XD*

There are moles of carbon in 6.64 moles of CCl2F2

Answers

Answer:

6.64 moles of carbon.

Explanation:

Given data:

Number of moles of C = ?

Number of moles of CCl₂F₂ = 6.64 mol

Solution:

In one mole ofCCl₂F₂ there is one mole of carbon two moles of chlorine and two moles of fluorine are present.

In 6.6 moles of CCl₂F₂ :

Moles of carbon = 6.64 × 1 = 6.64 moles of carbon.

Moles of chlorine = 6.64× 2 = 13.28 moles of chlorine

Moles of fluorine = 6.64× 2 = 13.28 moles of fluorine

Answer: 6.64 moles

Explanation:

Number of moles of C = ?

number of moles of CCl₂F₂ = 6.64 mol

In one mole of CCl₂F₂ there is one mole of carbon two moles of chlorine and two moles of fluorine are present.

In 6.6 moles of CCl₂F₂ :

Moles of carbon = 6.64 × 1 = 6.64 moles of carbon.

Moles of chlorine = 6.64× 2 = 13.28 moles of chlorine

Moles of fluorine = 6.64× 2 = 13.28 moles of fluorine

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