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Solnce55 [7]
3 years ago
7

Which of the following describes a compound? (Hint: Carbon and oxygen both appear on the periodic table.) A. a piece of pure car

bon, containing only carbon atoms B. oxygen gas surrounding a solid piece of carbon C. a substance made of two oxygen atoms for each carbon atom D. carbon and oxygen atoms mixed without being bonded together
Chemistry
2 answers:
Pachacha [2.7K]3 years ago
8 0

Answer: the answer is c

Xelga [282]3 years ago
4 0

Compound is defined as a pure substance which is made up of two or more different elements present in the fixed ratio and they can be separated into smaller substances by means of chemical processes.

Thus, a substance made up of two oxygen atoms for each carbon atom describes a compound as the substance is made up of two different elements which are present in the fixed ratio.

Hence, option c that is a substance made up of two oxygen atoms for each carbon atom describes a compound.

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Feliz [49]

Answer:

hi! I hope your having a awesome day

Explanation:

6 0
3 years ago
2)a dish contains a blackish-yellow powder.when a magnet is moved over it black particles iron get stuck to the magnet and only
Andrei [34K]
A element mixture (key word: mixture) due to the mixture containing 2 different types of elements it can be said that it’s highly likely that the mixture was not a compound but instead of a mixture due to mixture meaning more than 1 material. Hopes this help!
6 0
2 years ago
Which characteristic is given by the angular momentum quantum number
Marianna [84]

Answer: orbital shape.


Justification:


1) There are four quantum numbers to describe the electrons. These are:


i) Principal quantum number (n)

ii) Azimuthal quantum number (ℓ), also called angular momentum quantum number.

iii) Magnetic quantum number (m)

iv) Spin quantum number (s)


2) The principal quantum number tells the main energy level. It can be 1, 2, 3, 4, 5, 6, 7. It is related with the orbial size. 1 is a small orbital, 7 is a big orbital.


2) The Azimuthal quantum number (ℓ) or angular momentum quantum number may be a number between 0 and n - 1.


It tells the kind of orbital, which is its shape


The correspondence is:


0 = s orbital,


1 = p orbital,


2 = d orbital,


3 = f orbital.


3) Magnetic quantum number (m) tells the orientation. It can be from - ℓ to + ℓ


For example when ℓ = 1, the orbital is p, and the magnetic quantum number may be -1, 0, or +1, which correspond to px, py, pz: the orientation of the p orbital in the space.


4) Spin quantum number (s) can be either +1/2 or -1/2.

7 0
3 years ago
Read 2 more answers
Which of the following is not a property of most<br> transition metals?
saul85 [17]

Answer:

Low melting point

Explanation:

Transition metals have the following properties:

Conductivity (Electrical and Thermal)

Malleability (You can hit it with a hammer to mold it)

High melting point

3 0
3 years ago
Read 2 more answers
According to the equation below, how many moles of Ca(OH)2 are required to react with 1.36 mol H3PO4 to produce Ca3(PO4)2? 3Ca(O
allsm [11]

<u>Answer:</u> The amount of calcium hydroxide needed to react is 2.04 moles

<u>Explanation:</u>

We are given:

Moles of phosphoric acid = 1.36 moles

For the given chemical equation:

3Ca(OH)_2+2H_3PO_4\rightarrow Ca_3(PO_4)_2+6H_2O

By Stoichiometry of the reaction:

2 moles of phosphoric acid reacts with 3 moles of calcium hydroxide

So, 1.36 moles of phosphoric acid will react with = \frac{3}{2}\times 1.36=2.04mol of calcium hydroxide

Hence, the amount of calcium hydroxide needed to react is 2.04 moles

3 0
4 years ago
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