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viktelen [127]
3 years ago
7

Select the correct answer. Which scientist performed the cathode ray experiment leading to the discovery of electrons? A. Dalton

B. Rutherford C. Democritus D. Bohr E. Thomson
Chemistry
2 answers:
MrRa [10]3 years ago
4 0
Hi,
The answer should be letter E, Thomson.
belka [17]3 years ago
4 0

Answer:

Thomson.

Explanation:

J.J.Thomson performed an experiment called cathode ray experiment in which he used a sealed tube fitted with two electrodes.

When a high voltage was applied, the cathodic electrode emitted some particles which moved towards anode. These particles were negatively charged and discovered as electrons.

So he discovered electrons.

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Determine how many gmol, kmol, and lbmols there are in 50 kilograms of n-hexane.
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Answer: 581 gmol

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Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{50\times 1000g}{86g/mol}=581mol

1. The conversion for mol to gmol

1 mol = 1 gmol

581 mol= \frac{1}{1}\times 581=581gmol

2. The conversion for mol to kmol

1 mol = 0.001 kmol

581 mol= \frac{0.001}{1}\times 581=0.581kmol

3. The conversion for mol to lbmol

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