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2 years ago

Need a little help with chemistry :) if you don’t know, don’t answer

Chemistry

2 answers:

Blizzard [7]2 years ago

6 0

Answer:

1.33 moles

Explanation:

sashaice [31]2 years ago

5 0

Answer:

8.00 x 10^23 / 6.02 x 10^23

Explanation:

sorry dont have my calculator but if you put it in you will get the answer

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Molecules have ionization energies, just like atoms do. The ionization energy for molecular oxygen, for example, is 1314 kJ/mol.

taurus [48]

Answer:

91.1835 nm

Explanation:

Given that the ionization energy of the oxygen molecule = 1314 kJ/mol

It means that

1 mole of oxygen molecules can be ionized by the energy = 1314 kJ = 1314000 J

1 mole of molecules contains 6.022 × 10²³ atoms

So,

6.022 × 10²³ atoms of oxygen molecules can be ionized by the energy = 1314000 J

1 atom require $\frac{1314000}{6.022\times 10^{23}}\ J$ of energy

Energy = $2.18\times 10^{-18}\ J$

Also

$E=\frac {h\times c}{\lambda}$

Where,

h is Plank's constant having value $6.626\times 10^{-34}\ Js$

c is the speed of light having value $3\times 10^8\ m/s$

$\lambda$ is the wavelength

So,

$\lambda=\frac {h\times c}{E}$

$\lambda=\frac{6.626\times 10^{-34}\times 3\times 10^8}{2.18\times 10^{-18}}\ m$

$\lambda=91.1835\times 10^{-9}}\ m$

Also,

$1\ nm=10^{-9}}\ m$

So, wavelength = 91.1835 nm

6 0

3 years ago

Nuclear fission reactions can produce different radioisotopes. One of these radioisotopes

hichkok12 [17]

Based on the information provided,

The evidence that this nuclear reaction reaction represent transmutation is it formed different elements

hope this helps

7 0

3 years ago

What tool do you use to measure mass?

pshichka [43]

Answer: Balance

Explanation: Mass is the amount of matter contained in a body.

7 0

3 years ago

Element abundant in the body are not abundant on Earth. True or False?

Lena [83]

False. The element abundant in our body is oxygen and on earth, it is still oxygen. The body is more than 50% water. A water molecule is 11% hydrogen and the rest is oxygen. That is why you can expect oxygen to be abundant in the body. Same is true with the earth. Majority of the oxygen is from the bodies of water the earth is rich of.

6 0

3 years ago

Can someone please look at this?

Alex Ar [27]

Answer:

$\large \boxed{\text{110 mmHg}}}$

Explanation:

We can use Dalton's Law of Partial Pressures:

Each gas in a mixture of gases exerts its pressure separately from the other gases.

In other words, if a gas makes up 3.0 % of the atmosphere, its partial pressure is 3.0 % of the total pressure.

$p_{\text{N}_{2}} = p_{\text{tot}} \times \dfrac{\text{3.0 parts N}_{2}}{\text{100 parts atmosphere}}= \text{3700 mmHg} \times \dfrac{\text{3.0 mmHg}}{\text{100 mmHg}} = \textbf{110 mmHg}\\\\p_{\text{N}_{2}} = \large \boxed{\textbf{110 mmHg}}$

4 0

3 years ago

Need a little help with chemistry :) *if you don’t know, don’t answer*

Need a little help with chemistry :) if you don’t know, don’t answer