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Anvisha [2.4K]
3 years ago
12

What are the answers??

Chemistry
1 answer:
jonny [76]3 years ago
6 0
The first one and last one I think
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Calculate the vapor pressure at 25 ?c of hexane above the solution. the vapor pressure of pure hexane at 25 ?c is 151 torr.
Studentka2010 [4]
One of the many ways in order to solve for the vapor pressure of pure components at a given temperature is through the Antoine's equation which is written below,
                                    P = 10^(A - B/C+T)
where A, B, and C are constants and T is the temperature in °C and P is the vapor pressure in mm Hg. 
For hexane,
                             A = 7.01
                             B = 1246.33
                             C = 232.988

Substituting the known values,
                            P = 10^(7.01 - 1246.33/232.988+25)
                             <em> P = 151.199 mm Hg</em>
8 0
3 years ago
How do you write out and balance calcium hydroxide reacts with hydrogen chloride to produce calcium chloride and water
Temka [501]

Answer:

 Ca(OH)₂ + 2HCl →  CaCl₂ +  2H₂O

Explanation:

Reactants;

     Calcium hydroxide = Ca(OH)₂

     Hydrogen chloride  = HCl

 Products;

       Calcium chloride  = CaCl₂

        Water  = H₂O

The reaction equation:

           Ca(OH)₂ + 2HCl →  CaCl₂ +  2H₂O

The reaction is a neutralization reaction where acids reacts with bases to produce salt and water only.

5 0
3 years ago
A fossil of an organism that lived during only one time is found in only one kind of rock layer, or stratum. If two strata conta
Damm [24]
I think this is true because they’re in the same layer, strata which would mean they died around the same time. Hope this helps sorry if it’s wrong!
6 0
3 years ago
Read 2 more answers
What did the Curies conclude about radioactivity based on their studies?
jenyasd209 [6]

Answer:

c

Explanation:

3 0
2 years ago
If you have 3.011x1023 atoms of carbon what would you expect it’s mass to be
devlian [24]

6 grams of Carbon is it’s mass

<u>Explanation:</u>

First we have to divide the given number of atoms (3.011 \times 10^2^3) by the Avogadro's number (6.022 \times 10^2^3), so that we will get the number of moles as 1/2.

Then the 1/2 moles of carbon is multiplied by the molar mass of Carbon which is 12 g/mol, we will get the mass of carbon as 6 grams.

So the mass of the carbon obtained is 6 grams.

4 0
3 years ago
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