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4 years ago

The billiard ball model was the working model of the atom until thomson discovered the

Physics

2 answers:

V125BC [204]4 years ago

7 0

The right answer is D, electron.

zysi [14]4 years ago

3 0

d. electron

J J Thomson discovered the electron, and it was put in his model of the atom.

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Conduction, convection, and radiation are ways by which,

Amiraneli [1.4K]

the answer is THERMAL

6 0

3 years ago

Read 2 more answers

What methods can be used to break down substances into elements

pychu [463]

Well i think Hydrolysis - using water to split a molecule that has formed via a condensation

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3 years ago

Each gas sample has the same temperature and pressure. which sample occupies the greatest volume? each gas sample has the same t

Anit [1.1K]

Answer:

20 gram of H as the greastest volume

Explanation:

Each gas sample has the same temperature and pressure. which sample occupies the greatest volume? each gas sample has the same temperature and pressure. which sample occupies the greatest volume? 40.0 gar 20.0 gne 20.0 gh2 4.0 ghe

Given that,

40.0 g of Ar

20.0 g of Ne

20.0 g of h

24.0 g of he

The ideal gas equation ; Pv = nRT

where P is the pressure, V is the volume, R is the gas constant, T is the temperature, n is the number of mole

which is equal to

n = m / M

where m is the given mass

M is the molar mass

The given gas sample are at the same temperature and pressure,

So, the temperature, pressure and gas constant are fixed.

Therefore the volume is proportional to the given mass and molar mass

V ∝ m/M

Substitute the given mass and molar mass of given masses for comparison

No of mole of Ar = mass / molar mass

= 40 / 40 = 1 mole

No of mole of Ne = mass / molar mass

= 20 / 20 = 1 mole

No of mole of h = mass / molar mass

= 20 / 1 = 20 mole

No of mole of he = mass / molar mass

= 24 / 4 = 6 mole

Hence, 20 gram of H as the greastest volume

3 0

3 years ago

How do scientists know our universe is older than 6500 years?

dmitriy555 [2]

This is because astronomers have discovered that the Crab Nebula is 6500 light years from earth. This means it takes 6500 earth years for light to get from the Crab Nebula to earth. Therefore, if we are able to observe the Crab Nebula and beyond it then it means that earth has been in existence for 6500 years and over.

5 0

3 years ago

A gas undergoes two processes. In the first, the volume remains constant at 0.170 m3 and the pressure increases from 1.50×105 Pa

Mnenie [13.5K]

Answer:

$W_{T} = - 24 kJ$