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asambeis [7]
3 years ago
6

When a sample is heated water is observed at the top of the tube. The compound melts and changes color. Te residue is not entire

ly soluble. It is most likely Select one: a. a carbohydrate b. a hydrate c. efflorescent d. deliquescent
Chemistry
1 answer:
harkovskaia [24]3 years ago
7 0

Answer:

hydrate

Explanation:

when a hydrate is heated,it changes color due to the exothermic reaction taking place.the structure of the complex changes but not entirely.this result in the sample to to not dissolve completely and we can observe the small traces of the sample.

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How many atoms are in an Apple
miss Akunina [59]

Answer:10^27 atoms in an apple

Explanation:

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3 years ago
How many moles of nitroge are there in 50.0 g of nitrogen?
chubhunter [2.5K]

1.785714286 moles

The number of moles (n) for nitrogen is: [ n=50.0÷28.0 ] = 1.785714286 moles.

8 0
3 years ago
Which of the following molecules have the weakest attraction to each other?<br> F2<br> Cl2<br> Br2
bija089 [108]

Answer:

Explanation:

F2 have the weakest attraction to each other because of higher electronegativity when they are brought close to each other they repel each other

5 0
3 years ago
What pressure (in atm) will 0.44 moles of co2 exert in a 2.6 l container at 25°c?
Lilit [14]
We can use the ideal gas law equation to find the pressure 
PV = nRTwhere 
P - pressure 
V - volume  - 2.6 x 10⁻³ m³ 
n - number of moles - 0.44 mol
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature - 25 °C + 273 = 298 K
substituting the values into the equation,
P x 2.6 x 10⁻³ m³  = 0.44 mol x 8.314 Jmol⁻¹K⁻¹ x 298 K
P = 419 281.41 Pa
101 325 Pa is equivalent to 1 atm 
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Pressure is 4.13 atm
6 0
3 years ago
Predict the order of elution if you were to attempt to separate using column chromatography on silica gel and with a gradient el
Minchanka [31]

Answer:

Follows this order: B=> A => C.

Explanation:

NB: kindly check the attachment for the diagram of compounds A, B and C.

Elution is a very important concept in chromatography separation techniques. It deals with the use of eluent in the removal of an adsobate from an adsorbent. The principle behind Elution is just about how polar the solvent is.

So, in this question Compound B will go with the Elution first because of its polarity. Compound B has lesser polarity as compared to Compounds A and B.

Compound A will then elutes second because of its polarity too as resonance increases its polarity.

Last, compound C elutes because it has the highest polarity which is caused by electronegative atoms.

6 0
3 years ago
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