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Dimas [21]
3 years ago
12

Identity which statement is true:

Chemistry
1 answer:
Anvisha [2.4K]3 years ago
8 0
Ans :C
same proton(atomic no.) and electron, diff neutrons
mass no= electrons + neutrons


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What two elements in the sun mostly made of
ivanzaharov [21]

The sun is made up of two main elements, hydrogen and helium.

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3 years ago
Calculate the molality of isoborneol in the product if, a) the melting point of pure camphor is 179°C and the melting point take
tresset_1 [31]

Answer:

The molality of isoborneol in camphor is 0.53 mol/kg.

Explanation:

Melting point of pure camphor= T =179°C

Melting point of sample = T_f = 165°C

Depression in freezing point = \Delta T_f=?

\Delta T_f=T- T_f=179^oC-165^oC=14^oC

Depression in freezing point  is also given by formula:

\Delta T_f=i\times K_f\times m

K_f = The freezing point depression constant

m = molality of the sample

i = van't Hoff factor

We have: K_f = 40°C kg/mol

i = 1 (  organic compounds)

\Delta T_f=14^oC

14^oC=1\times 40^oC kg/mol\times m

m=\frac{14^oC}{1\times 40^oC kg/mol}=0.35 mol/kg

The molality of isoborneol in camphor is 0.53 mol/kg.

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3 years ago
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What is a substance and what are the two types of substances?
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Answer:

Explanation:

check below for explanation.

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