CHEMISTRY HIGH SCHOOL

. Find the mass of 0.159 mol silicon dioxide.​

Answers

Answer 1
Answer:

One mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The mass of  0.159 mole silicon dioxide.​ is 9.55g.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample.

Mathematically,

mole =given mass ÷ Molar mass

First of all we find the molar mass of silicon oxide

Molar mass of silicon oxide= atomic mass of silicon+2×molar mass of oxygen

Molar mass of silicon oxide=28.0855+2×16

Molar mass of silicon oxide=60.08 g/mol

Substituting the values in fisrt equation we get

0.159 mol=given mass÷60.08 g/mol

0.159 mole x 60.08 g/mol=mass

9.55g=mass of silicon oxide

Therefore the mass of 0.159 mol silicon dioxide.​ is 9.55g.

To know more about mole, here:

brainly.com/question/15209553

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Answer 2
Answer:

Answer:

9.55 grams of SiO2

Explanation:

If the mass you mean by grams:

0.159 mole x 60.08 g (Periodic table by adding both elements)

Cancel moles with moles (Original moles with the 1 mol at the bottom of the grams) and gives you:

9.55 grams of SiO2

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I hope this helps.  Let me know in the comments if anything is unclear.

Which it's which pls help me

Answers

P: Good conductor of heat and electricity - R: the delocalized electrons are
free to move around the structure

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OXIDATION IN
Cl2(aq) + 2Brmc003-1.jpg(aq) mc003-2.jpg 2Clmc003-3.jpg(aq) + Br2(aq)

Answers

I think the chemical reaction is:

Cl2(aq) + 2Br-(aq) = 2Cl-(aq) + Br2(aq)

The oxidation in this reaction is the reaction for bromine where the charge goes from -1 to a neutral charge while the reduction reaction is showed by the chlorine from a neutral charge to a -1 charge.

Carefully looking at an object or process

Answers

observation

They utilize and make use of the scientific method in order to have clear basis and evidence for their investigations. Research method is always used to answer every scientific inquiry and in gaining evidential data or knowledge. The scientific method has the following process or at least undergoes the process of
1. Observation 
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Based on the results of testing colorless solutions with indicators, which solution is most acidic?(1) a solution in which bromthymol blue is blue
(2) a solution in which bromcresol green is blue
(3) a solution in which phenolphthalein is pink
(4) a solution in which methyl orange is red

Answers

On litmus paper (the slip of paper that changes color to measure acidity), the redder the color is, the more acidic it is. 
Therefore, the solution that is most acidic is methyl orange because it was a darker red then any of the others.

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Hope this helped!! :D
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3-4 sentences if you give me 3-4 ill like if you give me 5 ill give 5 star if you give me 6 ill do all and branliest pls help. Why is the study of human movement important?

Answers

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