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3 years ago

How mariy molecules of water are in a 500.3 g sample?

Chemistry

1 answer:

JulijaS [17]3 years ago

3 0

Answer:

1.67×10^25 molecules

Explanation:

No of molecules = no of moles × Avogadros number

No of moles= mass in gram / molar mass

No of moles of water in given sample = 500.3/18

= 27.79 moles

No of molecules = 27.79× 6.02×10^ 23

= 167.32×10^23 or 1.67×10^25

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PolarNik [594]

Explanation:

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3 years ago

Place the following elements in order of increasing electronegativity.K Cs PA. K < P < CsB. P < Cs < KC. Cs < K &

skad [1K]

Answer:

C. Cs < K < P

Explanation:

Electronegativity is the basically the tendency of an atom to attract electrons. The pauling scale is used to quantify electronegativity, the most electronegative element; fluorine has a value of 4.0 and francium, the least electronegative element has a value of 0.7

The electronegative values of the following elements are given as;

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Arranging in order of increasing electronegativity, we have;

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3 years ago

What is thr valency of scadium

Hoochie [10]

scandium is a transition metal and shows a valency of 3.

4 0

3 years ago

write a balanced chemical equation for each single replacement reaction that takes place in aqueous solution. write no reaction

Illusion [34]

The question is incomplete, here is the complete question:

Write a balanced chemical equation for each single replacement reaction that takes place in aqueous solution. write no reaction if a reaction does not occur

1.) Zn + PbCl₂

2.) Cu + Fe(NO₃)₂

Answer:

For 1: The reaction does occur.

For 2: The reaction does not occur.

Explanation:

Single displacement reaction is defined as the reaction in which more reactive element displaces a less reactive element.

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$A+BC\rightarrow AC+B$

For the given options:

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$Zn+PbCl_2\rightarrow ZnCl_2+Pb$

For 2:

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$Cu+Fe(NO_3)_2\rightarrow \text{No reaction}$

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3 years ago

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Arada [10]

Answer:

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5 pictograph

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Explanation:

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3 years ago