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3 years ago

What is the charge on an electron? -1 0 +1 -2

Chemistry

2 answers:

Mama L [17]3 years ago

5 0

An electron has a negative charge of one

An neutron has no charge (hence, neutral)

An proton has a positive charge of one

Xelga [282]3 years ago

3 0

_____________________________

As we know that the charge of the electron is equivalent to the magnitude of the elementary charge that is (e) but bearing a negative sign.

Since, the value of the elementary charge is roughly

$1.602 \: \times \: {10}^{ - 19} C$

then, the charge of the electron is :

$- 1.602 \: \times \: {10}^{ - 19} C$

Here, C is the unit of charge is Coulomb.

So, the charge on an electron is (-1).

_____________________________

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(b) Why is the heat of sublimation ( ΔH fus ) of a substance greater than its ( ΔHvap ) ?

Ivanshal [37]

This is because solids have less energy than liquids do, hence it takes more energy to excite a solid into its gaseous phase than it does a liquid.

When opposed to merely reducing their separation, from solid to liquid, the energy needed to totally separate the molecules as they move from liquid to gas is substantially higher. The latent heat of vaporization is therefore bigger than the latent heat of fusion for this reason.

<h3>What is heat of sublimation?</h3>

The amount of energy required to change one mole of a substance from its solid to its gaseous state under particular conditions—typically the standard ones—is known as the enthalpy of sublimation or heat of sublimation (STP). A solid's worth is based on its cohesive energy.

<h3>What is heat of vaporization?</h3>

The term "enthalpy of vaporization," which is often referred to as "heat of vaporization" or "heat of evaporation," refers to the amount of energy that must be applied to a liquid substance in order to cause a part of that substance to transform into a gas. Vaporization's enthalpy varies with the pressure at which the transition takes place.

Learn more about heat of sublimation: brainly.com/question/13200793

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The correct question is:

Why heat of the sublimation of a substance is greater than the heat of vaporization?

7 0

1 year ago

Gold has a density of about 20.0g/mL this means that each milliliter has a mass of about __ grams.

qwelly [4]

Answer:

20.0 grams

Explanation:

If the density of gold is 20.0 g/mL, then we can multiply it by 1 mLto find the weight of 1 mL of gold.

20.0 $\frac{grams}{mL}$ *1mL=20.0 grams

8 0

3 years ago

Read 2 more answers

Acetone is one of the most important solvents in organic chemistry. It is used to dissolve everything from fats and waxes to air

Yanka [14]

Answer: a. 79.6 s

b. 44.3 s

c. 191 s

Explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

$t_{\frac{1}{2}}=\frac{0.693}{k}$

$t_{\frac{1}{2}}=\frac{0.693}{8.7\times 10^{-3}s^{-1}}=79.6s$

b) for completion of 32% of reaction

$t=\frac{2.303}{k}\log\frac{100}{100-32}$

$t=\frac{2.303}{8.7\times 10^{-3}}\log\frac{100}{68}$

$t=44.3s$

c) for completion of 81 % of reaction

$t=\frac{2.303}{k}\log\frac{100}{100-81}$

$t=\frac{2.303}{8.7\times 10^{-3}}\log\frac{100}{19}$

$t=191s$

4 0

2 years ago

what is the volume of a book that has a width of 10cm,a length that is 2 times the width,and a height that is half the width

Masteriza [31]

width=10cm

length=2xwidth=2x10=20cm

height=width/2=10/2=5

V=w*l*h=10*20*5=1000cm^3

5 0

2 years ago

Read 2 more answers

Write the complete balanced equation for the reaction between aluminum metal (Al) and oxygen gas (O2). You do not need to make t

Soloha48 [4]

For the answer to the question above, asking to w<span>rite the complete balanced equation for the reaction between aluminum metal (Al) and oxygen gas (O2)and You do not need to make the subscripts smaller.
My answer would be,
</span><span>4Al(s) + 3O2(g) --->2 Al2O3(s)
</span>
I hope this helps.

3 0

3 years ago