3 years ago

Why only electrons stick to oil drop in millikan's experiment however protons are also present there?

1 answer:

5 0

Explanation:

probably because, X rays are used to ionise the gas molecules, which is loss of electrons, these electrons are absorbed by oil drops

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3. What is the molar mass of O2? Round to nearest whole number. 8 O 16 32 64

SVETLANKA909090 [29]

Answer:

Molar mass of O is = 16

Molar mass of O2 = 32

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2 years ago

A chemical change occurs when an egg cooks. What effect does cooking have on the physical properties of an egg?

fomenos

I'm not sure, but maybe burning point...

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2 years ago

Simon has collected three samples from the coral reef where he observes marine life. He must determine whether each one is a pur

zysi [14]

SAMPLE A - pure substance.
SAMPLE B - homogeneous mixture.
SAMPLE C - heterogeneous mixture.
Pure substance - constant composition and properties.
Homogeneous mixture - same uniform appearance and composition.
Heterogeneous mixture - not uniform in composition, two phases (liquid and dust).

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3 years ago

Read 2 more answers

Which is smaller 25 mm or 25cm

umka21 [38]

Answer:

25 mm is smaller.

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3 years ago

To measure the speed of a car, we use miles per hour (miles/hour or mi/h or mph). To measure the rate of a reaction we use molar

arsen [322]

Answer:

Part A: 47.8 mi/h

Part B: 0.072 M/s

Part C: 0.144 M/s

Explanation:

Part A

The average speed or velocity (V) is the variation of the space divided by the variation of the time:

V = (241 - 2)/(8 -3)

V = 47.8 mi/h

Part B

As Part A, the average rate (r) of formation of I2 is the variation of the concentration divided by the variation of time:

r = (1.83 - 1.11)/(15 - 5)

r = 0.072 M/s

Part C

The rates of the substances are proportional of their number of moles (n) which are their coefficient, so:

rI2/nI2 = rHCl/nHCl

0.072/1 = rHCl/2

rHCl = 2*0.072

rHCl = 0.144 M/s

7 0

2 years ago