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raketka [301]
3 years ago
13

How can you tell which elements are more metallic than others by just looking at the periodic table?

Chemistry
1 answer:
timofeeve [1]3 years ago
8 0
<span>The Periodic table of elements is divided in 18 columns, which is called a group or a family. A group of elements share the same physical or chemical characteristics. Elements that are more metallic than others are in group or column 1 also called Alkali Metals. Alkali metals are considered to be very reactive and can explode if it comes in contact with water. Hydrogen has been considered to have the characteristics of both Alkali metal and Halogens.  </span>



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What temperature air has low pressure?
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Whats is a chemical change of a paper bag
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How many molecules of oxygen are needed to make 3.5 oxygens of water?​
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Answer:

57.6g

Explanation:

So, if in one mole of water, 16 g of oxygen atom is present. Then, in 3.6 moles of water, the mass of oxygen present will be 3.6×16=57.6g. Therefore, the amount of oxygen present in 3.6 g water is option (B)- 57.6 g.

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In the periodic table, a set of properties repeats from
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Problem PageQuestion Methane gas and chlorine gas react to form hydrogen chloride gas and carbon tetrachloride gas. What volume
IgorC [24]

Methane gas and chlorine gas react to form hydrogen chloride gas and carbon tetrachloride gas. What volume of hydrogen chloride would be produced by this reaction if 3.16 L of chlorine were consumed at STP.

Be sure your answer has the correct number of significant digits.

Answer: Thus volume of carbon tetrachloride that would be produced is 0.788 L

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 1 atm  (at STP)

V = Volume of gas = 3.16 L

n = number of moles = ?

R = gas constant =0.0821Latm/Kmol

T =temperature =273K=

n=\frac{PV}{RT}

n=\frac{1atm\times 3.16L}{0.0820 L atm/K mol\times 273K}=0.141moles

CH_4+4Cl_2\rightarrow 4HCl+CCl_4

According to stoichiometry:

4 moles of chlorine produces = 1 mole of carbon tetrachloride

Thus 0.141 moles of methane produces = \frac{1}{4}\times 0.141=0.0352 moles of carbon tetrachloride

volume of carbon tetrachloride =moles\times {\text {Molar volume}}=0.0352mol\times 22.4L/mol=0.788L

Thus volume of carbon tetrachloride that would be produced is 0.788 L

8 0
3 years ago
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