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leonid [27]
3 years ago
8

Five students had to answer the question how are elements arranged in a periodic table

Chemistry
1 answer:
attashe74 [19]3 years ago
8 0
As the atomic number of an element increases, so does the atomic weight(mass). It should be the first option.
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A student determines that she used 0.0665 mol of sodium hydroxide (NaOH) to completely titrate 25.00 mL of sulfuric acid solutio
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To determine the concentration of one solution which is specifically basic or acidic solution through taking advantage on its points of equivalence, titration analysis is done.

Let us determine the reaction for the titration below:

2NaOH +2H2SO4 = Na2SO4 +2H2O

 

So,

0.0665 mol NaOH (2 mol H2SO4/ 2mol NaOH) / .025 L solution 

= 2.62 M H2SO4


The answer is the fourth option: 

<span>2.62 M</span>
7 0
3 years ago
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In a simple distillation setup, what is the sequence of equipment from the bench top to the round bottom flask
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In a simple distillation setup, the sequence of equipment from the bench top to the round bottom flask is:

  • Thermometer
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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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2 years ago
In an experiment, marble chips reacted with dilute hydrochloric acid and carbon dioxide gas was given
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Answer:

no

Explanation:

Small marble chips reacts faster

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Electrons in an atom are found on different electron shells depending on how much energy they possess, and they determine how atoms will interact with each other. The outermost electron shell holds the valance electrons.
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