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Free_Kalibri [48]
3 years ago
10

How many oxygen atoms are in 1.00 g of quartz?

Chemistry
1 answer:
Arturiano [62]3 years ago
4 0
<span>2.00 x 10^22 atoms The empirical formula for quartz is SiO2, so calculate the molar mass of quartz. Silicon = 28.0855 Oxygen = 15.999 Molar mass = 28.0855 + 2 * 15.999 = 60.0835 Now divide the mass you have of quartz by its molar mass 1.00 g / 60.0835 g/mol = 0.016644 mol Since you have 2 moles of oxygen atoms per mole of quartz, multiply by 2 0.016644 mol * 2 = 0.033288 mol Finally, multiply by avogadro's number to get the number of atoms. 0.033288 mol * 6.0221409e+23 atoms/mol = 2.00465 x 10^22 Round to 3 significant figures to get 2.00 x 10^22</span>
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In a simple distillation setup, what is the sequence of equipment from the bench top to the round bottom flask
Julli [10]

In a simple distillation setup, the sequence of equipment from the bench top to the round bottom flask is:

  • Thermometer
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  • Round bottom flask
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<h3>What is Distillation?</h3>

This is the process in which a mixture is separated through selective boiling and condensation.

The distillation flask and liebig condenser are usually located above the round bottom flask in the set up.

Read more about Distillation here brainly.com/question/24553469

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3 0
2 years ago
A photon of green light strikes an unknown metal and an electron is emitted. The voltage is set to 2 volts. The electron cannot
SVETLANKA909090 [29]

Answer:

The correct answer is:

An electron will be emitted in the second experiment, but it cannot be determined whether it will reach the second plate.

Explanation:

In fact, violet has higher frequency than green light. This means that photons on violet carry more energy than photons of green light (remember that the energy of a photon is proportional to it's frequency:

e = hf

, so when they hit the surface of the metal, more energy is transferred to the electrons. The electron was already emitted with green light, so it must be emitted with also violet light, given the more energy transferred.

7 0
3 years ago
I will mark brainly , please help !
topjm [15]
...a metal atom will *lose* electrons to form a *positive* cation and a nonmetal atom will *accept* electrons to form an *negative* anion.
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3 years ago
HELPPPP PLEASE THIS IS FOR THE CATALYSTS LAB
marishachu [46]

Answer:

the first thing you do is do your experiment then title it. then state the purpose of the experiment. included a summary of the experiment. make a list of the materials you used. present all the steps in order to make the experiment possible. note any changes to the original procedure. this is basically the steps you have to do in order to make your scientific experiment.

4 0
3 years ago
What would a scientist’s next steps be if his/her data failed to support their hypothesis?
Paul [167]
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