3 years ago

How many hours are in 25 days??

1 answer:

8 0

There are 600 hours.

explanation

each day has 24 hours and we want to know how much hours is equivalent to 25 days so we multiply 24 times 25 which is 600.

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The temperature of a container of oxygen gas is increased from 149 k to 298 k which of the following statement is true

ozzi

Answer:

______is used in production of hard disk.

Explanation:

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3 years ago

W + BgCz2 --> WCz + Bg<br> Balance this equation

yanalaym [24]

Answer: W + BgCz2 arrow WCz + Bg

2 W + BgCz2 arrow 2 WCz + Bg

Explanation:

Cz has 2 so you balcne the other side of WCz.

Since you Balcanes the Cz you changed the W and you Balcanes the other W on the left side.

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3 years ago

What is the word for squezing a group of particles in a wave?

professor190 [17]

It's called Compression.

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3 years ago

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A hydrogen-like ion is an ion containing only one electron. The energies of the electron in a hydrogen-like ion are given by the

yan [13]

Answer:

The ionization energy (in kJ/mol) of the helium ion is 21,004.73 kJ/mol .

Explanation:

$E_n = -(2.18 10-18 J)\times \frac{Z^2}{n^2}$

Z = atomic mass

n = principal quantum number

Energy of the electron in n=1,

$E_1= -(2.18 10^{-18} J)\times \frac{4^2}{1^2}=-3.488\times 10^{-17} J$

Energy of the electron in n = ∞

$E_{\infty}= -(2.18 10^{-18} J)\times \frac{2^2}{\infty ^2}=0 J$

Ionization energy of the $He^+$ ion:

$I.E=E_{infty}-E_1=0-(-3.488\times 10^{-17} J)=3.488\times 10^{-17} J$

$I.E=3.488\times 10^{-20} kJ$

To convert in into kj/mol multiply it with $N_A=6.022\times 10^{23} mol^{-1}$

$I.E=3.488\times 10^{-20} kJ\times 6.022\times 10^{23} mol^{-1}=21,004.73kJ/mol$

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3 years ago

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A ________ is an electric circuit that produces a magnetic field

aksik [14]

I believe it would be D. Electromagnet. It's been a while since I've done this stuff, tho. Hope this helps!!!! :)

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3 years ago