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kifflom [539]
3 years ago
14

How many electrons are present in 4He2+?

Chemistry
1 answer:
Charra [1.4K]3 years ago
4 0
4 and 2 electrons are present.
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kvasek [131]

Answer:

B. Biosphere.

Explanation:

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3 years ago
A scientist made careful measurements of the pressure and temperature of many different gases. Based on these measurements, he c
alex41 [277]

Answer:

c. law

Explanation:

Law -

It is type of statement , which helps to explain certain observations , in the form of mathematical relationship or verbal statements , is referred as a law .

Law is a widely accepted information , which can get altered by some new inventions or exception.

A law is stated in words as well as in the form of some mathematical relationships or equations.

Hence , from the given information of the question,

The correct option is c. law .

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What is C2H8 ? please hurry<br> (CH4=methane)<br> (C2H2=acetylene)
JulijaS [17]

Answer:

Carbon carbon | C2H8 - PubChem.

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Brainliest plz :)

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3 years ago
Read 2 more answers
30 POINTS PLEASE HELP ASAP
lina2011 [118]

Hello!

We have the following data:

f (radiation frequency) = 3.0*10^{19}\:Hz

v (speed of light) = 3.0*10^8\:m/s

λ (wavelength) = ? (in m)

Let's find the wavelength, let's see:

f = \dfrac{v}{\lambda}

3.0*10^{19} = \dfrac{3.0*10^8}{\lambda}

\lambda = \dfrac{3.0*10^8}{3.0*10^{19}}

\boxed{\boxed{\lambda = 1*10^{-11}\:m}}\Longleftarrow(wavelenght)\end{array}}\qquad\checkmark

I Hope this helps, greetings ... DexteR! =)

4 0
3 years ago
PLEASE HELP ME Which of the following is an example of -ΔS? Picking up marbles and placing them in a sack Paint spilling onto th
yan [13]

Answer:

Picking up marbles and placing them in a sack

Explanation:

The entropy of a chemical system is defined as the measure of disorder. Therefore a negative change in entropy is the movement to a more ordered state. The only option here which achieves a more ordered state, would be the first option.

Picking up marbles and placing them in a stack achieves more order, rather than the other options - that achieve more disorder.

7 0
3 years ago
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