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amid [387]
3 years ago
11

Solid liquid and gas is physical or chemical explain

Chemistry
1 answer:
Aleksandr [31]3 years ago
5 0

Answer: Physical change

Explanation:  I said physical change because its changing the form of the substance and also solid to gas are sublimating

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5.60g of glyceraldehydes was dissolved in 10ml of a solvent and placed in a 50mm cell if the rotation is 1.74 calculate the spec
KonstantinChe [14]

Answer:

6.214 degrees-mL/gdm

Explanation:

The specific rotation α' = α/LC where α = observed rotation, L = length of tube and C = concentration of solution.

Given that α = 1.74, L = length of cell = 50 mm = 0.50 dm and C = m/V where m = mass of glyceraldehyde = 5.60 g and V = volume = 10 ml

So, C = m/V = 5.60 g/10 ml = 0.560 g/ml

Since α' = α/LC

substituting the values of the variables into the equation, we have

α' = α/LC

α' = 1.74/(0.50 dm × 0.560 g/ml)

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7 0
3 years ago
Neon effuses 1.26 times as fast an an unknown gas at a particular temperature. What is the molar mass of the unknown gas
Svetach [21]

Answer:

31.75 amu

Explanation:

Using Graham's equation of effusion as depicted below:

V1/V2 = √m2/√m1

Where; v1 = speed of neon gas

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Hence,

1.26x/1x = √m2/√20

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m2 = 5.635²

m2 = 31.75 amu

Therefore, the molar mass of the unknown gas is 31.75 amu.

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