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3 years ago

What similarities and difference exist between electrons and neutrons? Consider charge, size, location and number.

Chemistry

1 answer:

Alborosie3 years ago

7 0

Charge:

An electron has a negative charge and a neutron has a neutral charge.

Size:

Electrons have a really small mass whereas the neutron has a mass of about 1 amu.

Location:

Neutrons are found in center of an atom, but electrons are around it.

Number:

The number of electrons and neutrons in atom varies.

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ICE Princess25 [194]

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1- Molar ratio: This ratio represents the ratio between the number of moles of any two substances in the balanced equation

2- The coefficients in the balanced chemical equation: These numbers represent the numbers of particles of each of the substances taking place in this chemical equation.

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3 years ago

What causes an ice cube to melt when removed from a freezer?

OverLord2011 [107]

Answer:

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3 years ago

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What is the volume, in liters, of 1.40 mol of oxygen gas at 20.0°C and 0.974 atm?

topjm [15]

Answer:

V = 34.55 L

Explanation:

Given that,

No of moles, n = 1.4

Temperature, T = 20°C = 20 + 273 = 293 K

Pressure, P = 0.974 atm

We need to find the volume of the gas. It can be calculated using Ideal gas equation which is :

PV=nRT

R is gas constant, $R=0.08206\ L-atm/mol-K$

Finding for V,

$V=\dfrac{nRT}{P}\\\\V=\dfrac{1.4\times 0.08206\times 293}{0.974 }\\\\V=34.55\ L$

So, the volume of the gas is 34.55 L.

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3 years ago

Find the volume. mass is 9.75 g and the density is 15.6 g/cm3

Leni [432]

Answer:

1.6cm3

Explanation:

density = mass/volume

15.6g/cm3= 9.75 g/volume

15.6/9.75 = volume

1.6cm3 = volume

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3 years ago

Balance the equation Ca(s) + H3PO4(aq) ---->Ca3(PO4)2(s) + H2(g)

vovikov84 [41]

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2 years ago