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PilotLPTM [1.2K]
3 years ago
13

How many oxygen atoms are in 1.60 g of quartz? hints?

Chemistry
2 answers:
Eva8 [605]3 years ago
7 0

Number of oxygen atoms in 1.6 g = 1.6 x 6.02 x 10^23 = 1.603 x 10^22 atoms.

Further Explanation:

Solution:

Quartz has the formula SiO2

From the periodic table:

mass of oxygen = 16 grams

mass of silicon = 28.0855 grams

Mass of one mole of quarts = 28.0855 + 2(16)

= 60.0855 grams

Formula:

number of moles = mass / molar mass

number of moles = 1.6 / 60.0855  

= 0.0266 moles

Each mole of quartz contains Avogadro's number of atoms.

So,

Number of oxygen atoms in 1.6 g = 1.6 x 6.02 x 10^23  

= 1.603 x 10^22 atoms

Quartz:

Quartz is a mineral made out of silicon and oxygen particles in a persistent structure of SiO₄ silicon–oxygen tetrahedra, with every oxygen being shared between two tetrahedra, giving a general substance equation of SiO₂. Quartz is the second most bottomless mineral in Earth's mainland covering, behind feldspar.  

quartz utilized for:  

Quartz is a significant mineral with various employments. Sand, which is made out of modest Quartz stones, is the essential element for the production of glass. Straightforward Rock Crystal has numerous electronic uses; it is utilized as oscillators in radios, watches, and weight measures, and in the investigation of optics.

Subject: chemistry

Level: High School

Keywords: solution, quartz, quartz utilized for.

Related links:  

Learn more about evolution on

brainly.com/question/7035326

brainly.com/question/6966537

Naily [24]3 years ago
4 0
Quartz has the formula SiO2
From the periodic table:
mass of oxygen = 16 grams
mass of silicon = 28.0855 grams
Mass of one mole of quarts = 28.0855 + 2(16) = 60.0855 grams

number of moles = mass / molar mass
number of moles = 1.6 / 60.0855 = 0.0266 moles

Each mole of quartz contains Avogadro's number of atoms.
Therefore:
number of atoms in 1.6 g = 1.6 x 6.02 x 10^23 = 1.603 x 10^22 atoms
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Given :

Volume of NaCl solution 2.5 L .

Molarity of NaCl solution is 0.070 M .

To Find :

How many moles are present in the solution.

Solution :

Let, n be the number of moles.

We know, molarity is given by :

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So,

n = M \times V\\\\n = 0.070\times 2.5 \\\\n = 0.175\ moles

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Answer:

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Explanation:

Data

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Temperature 1 = T1 = -108°C               Temperature 2 = 22°C

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Process

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                     P1V1/T1 = P2V2/T2

-Solve for P2

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T1 = -108 + 273 = 165°K

T2 = 22 + 273 = 295°K

- Convert volume 2 to liters

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                         x = (855 x 1) / 1000

                         x = 0.855 l

-Substitution

                    P2 = (12.8 x 100 x 295) / (165 x 0.855)

-Simplification

                    P2 = 377600 / 141.075

-Result

                   P2 = 2676.6 kPa

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