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Studentka2010 [4]
3 years ago
15

Please help me! Will mark brainliest! Thank you!

Chemistry
1 answer:
Kamila [148]3 years ago
8 0

Answer:

gas

Explanation:

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Analysis
Karolina [17]

The properties of substances can be used to put the into groups.

<h3>Grouping of substances</h3>

In chemistry, it is often necessary to put substances into groups based  on similarity in their properties. This is what led to the idea of a periodic table of elements.

Similarly, when we have unknown substances, we can group them according to the similarities in their properties.

Learn more about properties of substances: brainly.com/question/19886211

6 0
2 years ago
How does the energy of an electron change when the electron moves closer to the nucleus
Minchanka [31]
When a electron moves from higher shell to lower shell ,it releases energy because if it goes to lower shell without releasing energy then it will unable to do that so.as lower electron shells have low energy electrons
8 0
3 years ago
How many grams of silver oxide are needed to react with 7.9 g of hydrochloric acid produce silver chloide and water?
Anastaziya [24]

Answer:

25.11 g.

Explanation:

  • It is clear from the balanced equation:

<em>Ag₂O + 2HCl → 2AgCl + H₂O.</em>

<em></em>

that 1.0  mole of Ag₂O reacts with 2.0 moles of HCl to produce 2.0 mole of AgCl and 1.0 moles of H₂O.

  • 7.8 g of HCl reacts with excess Ag₂O. To calculate the no. of grams of Ag₂O that reacted, we should calculate the no. of moles of HCl:

<em>no. of moles of HCl = mass/atomic mass</em> = (7.9 g)/(36.46 g/mol) = <em>0.2167 mol.</em>

  • From the balanced equation; every 1.0 mol of Ag₂O reacts with 2 moles of HCl.

∴ 0.2167 mol of HCl will react with (0.2617 mol / 2 = 0.1083 mol) of Ag₂O.

<em>∴ The mass of reacted Ag₂O = no. of moles x molar mas</em>s = (0.1083 mol)(231.735 g/mol) = <em>25.11 g.</em>

7 0
3 years ago
How would you test to find out if<br> indigestion tablets are better than using<br> baking powder?
Orlov [11]
Go here and see how:
http://www.rsc.org/learn-chemistry/resource/res00000698/using-indigestion-tablets-to-neutralise-an-acid?cmpid=CMP00005978
7 0
3 years ago
C6H6 es organico o inorganico y porque
Luda [366]
<h2>organico</h2>

  • El benceno es un hidrocarburo aromático, de fórmula molecular C6H6. Es un líquido incoloro a temperatura ambiente. Se convierte fácilmente en vapor o gas, siendo por tanto un Compuesto Orgánico Volátil (COV).
6 0
3 years ago
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