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AfilCa [17]
3 years ago
8

_Zn+_HCLarrow_ZnCl2+_H2

Chemistry
1 answer:
dsp733 years ago
6 0
Plug in any number that yo think it’s the answer and make a t chart and put every letter in it and the other side the number until it is balanced
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The density of magnesium is 1.7 g/cm3, and the density of iron is 7.9 g/cm3. Consider a block of iron with a mass of 819 g. What
BigorU [14]

Answer:

mass of Mg=0.016g

Explanation:

P(Mg)=1.7g/cm³

P(Fe)=7.9g/cm³

m(Fe)=819g

P(Fe)=m(Fe)/v(Fe)

7.9=819/v(Fe)

v(Fe)=0.0096cm³

since v(Mg)=v(Fe)

=0.0096cm³

P(Mg)=m(Mg) /v(Mg)

1.7=m(Mg)/0.0096

m(Mg) = 0.016g

8 0
3 years ago
What is the boiling point of cyclohexane at 620 mmhg? can you show calculations?
Anton [14]

 Boiling point of cyclohexane at 620 mm hg?  

Standard atmospheric pressure is 760 mm Hg. Boiling point at 760 mm= 80.74˚C  

A liquid boils when its vapor pressure is equal to the atmospheric pressure. The vapor pressure of a liquid is proportional the absolute temperature of the liquid.  

As the atmospheric pressure decreases, less vapor pressure is needed to cause the liquid to boil. Less vapor pressure means lower temperature.  

The boiling point of cyclohexane at 620 mm Hg is less than 80.74˚C



TRY THAT OR THIS

 

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