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steposvetlana [31]
3 years ago
15

Nitrogen bases are molecules that contain nitrogen and other elements

Chemistry
1 answer:
Bogdan [553]3 years ago
3 0
True it also contains oxygen
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An electron confined in a one-dimensional box is observed, at different times, to have energies of 12 eV, 27 eV, and 48 eV. What
Fynjy0 [20]

Answer:

l=3.5*10^{-10}m

Explanation:

From the question we are told that:

1st Energy     E_1=12eV=4(3eV)

2nd Energy  E_2=27eV=9(3eV)

3rd Energy   E_3=48eV=16(3eV)

 

Generally the equation for Energy E for electron in one dimensional box at ground state E_0 is mathematically given by

  E_0=\frac{h}{8ml^2}

  E_0=\frac{h}{8ml^2}

Therefore Length a is mathematically given as

l=\sqrt{\frac{h^2}{8mE_0} }

l=\sqrt{\frac{(6.625*10^{-34})^2}{8(9.1*19^{-31}{(3eV(1.6*10^{-19}))}}

l=3.5*10^{-10}m

8 0
3 years ago
What are isotopes please help
NikAS [45]

Answer:

Isotopes are atoms of the same element with the same number of protons but different number of neutrons.

Hope this helps.

6 0
3 years ago
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Jim investigates how the angle of a throw affects the distance that the ball travels.
denis23 [38]

Answer:

force exerted on the ball

Explanation:

4 0
4 years ago
How many grams of water can be heated from 15.0°C to 75°C using 12,500 Joules?
max2010maxim [7]

Answer:

m = 49.8 g

Explanation:

Hello there!

In this case, for this calorimetry processes we can define the involved heat in terms of mass, specific heat and temperature as shown below:

Q=mC\Delta T

Thus, given the heat, final and initial temperature and specific heat of water (4.184), the mass of water can be computed as shown below:

m=\frac{Q}{C\Delta T}\\\\m=\frac{12500J}{4.184\frac{J}{g\°C}(75\°C-15.0\°C)} \\\\m=49.8g

Best regards!

8 0
3 years ago
Can someone help me i never know the answer for some reason.
artcher [175]

Answer:

ughhh

Explanation:

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3 years ago
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