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const2013 [10]
2 years ago
11

Why did all sodium compounds show the same colour in the flame? (flame test)

Chemistry
1 answer:
mojhsa [17]2 years ago
5 0

Answer:

Every element has its own particular spectrum of colours that the atoms or ions will emit when energy (in this case heat) is supplied. ... So, the sodium in sodium chloride, sodium nitrate, etc all produce the same bright yellow colour that is a characteristic of sodium.

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What makes a compound a base?
PSYCHO15rus [73]

Answer:

C.) It dissolves into Hydroxide ions in water (OH-)

Explanation:

A.) is incorrect because acids dissolve into hydrogen ions, not bases.

B.) is incorrect because acids have a pH lower than 7. Bases have a pH higher than 7.

C.) is correct because this is the defining characteristic of bases.

D.) is incorrect because bases can dissolve oils. This means they can be mixed.

3 0
2 years ago
The effusion rate of hcl is 43.2 cm/min in a certain effusion apparatus. what is the rate of effusion of ammonia in the same app
Jlenok [28]

The effusion rate is 1.125 cm/sec for ammonia.

How to find effusion rate ?

Effusion rate (r1) HCl = 43.2 cm/min

Molar mass (m2) NH3 =17.04g/mole

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  • Substitute the molar masses of the gases into Graham's law and solve for the ratio.
  • r1÷r2=√m2÷m1

       firstly convert 43.2 cm/min into cm/sec i.e., 0.72 cm/sec

      Then,

      0.72/r2 =√17.04/36.46

      r2= 1.125 cm/sec

Hence, the rate of diffusion of ammonia is 1.125 times faster than the rate of diffusion of hydrogen chloride.

learn more about effusion here:

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5 0
2 years ago
Is c6h8 molecular or empirical
kolezko [41]

Answer:

Molecular

C6H8 has the empirical formulae as <em>C3H4</em>

6 0
3 years ago
What is the ph of H2?
nekit [7.7K]

Answer:

Hydrogen ion concentration is more conveniently expressed as pH, which is the logarithm of the reciprocal of the hydrogen ion concentration in gram moles per liter. Thus, in a neutral solution the hydrogen ion (H+) and the hydroxyl ion (OH−) concentrations are equal, and each is equal to 10−7. A pH of 7 is neutral

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