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Alexxandr [17]
2 years ago
10

If you can help me answer any of these I’d appreciate it so much!

Chemistry
1 answer:
Shkiper50 [21]2 years ago
5 0

Answer:

I  can answer some of these.

Explanation:

Q 36.  B. Is false.

Q. 37  C. is false.

Q. 28.

All the  numbers are 1.

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How much energy in kJ is associated with a radio wave of wavelength 1.2 X 10^2 m?
eduard
It's very simple.

Energy = \frac{hc}{\lambda}

where, h= Planck's constant = 6.6 x 10^{-34} m^2 kg/s

c= speed of light = 3 x 10^{8} m/s
\lambda = wavelength


So, energy = \frac{6.6 \times 10^{-34} \times 3 \times 10^{8}}{120}

= 1.65 x 10^{-27} J
=1.65 x 10^{-30} KJ

6 0
3 years ago
Can someone help me pleasee
Romashka [77]

Answer:

4,1,5,3,2 (from left to right)

8 0
3 years ago
What does the host mean when he says that the acid has "donated a proton" to the water?
weqwewe [10]

Answer:

Option B

Explanation:

As Brønsted-Lowry theory states, acids are the ones that can donate protons.

When a proton is donated, it is released to become medium more acidic.

HCl is a strong acid.

HCl (l) + H₂O (l)  →  H₃O⁺ (aq) +  Cl⁻(aq)

These always reffers to strong acid where the dissociation is 100% completed.

In a weak acid, dissociation is not 100% complete, that's why we have an equilibrium.

HA (l) + H₂O (l)  ⇄  H₃O⁺ (aq) +  A⁻(aq)                   Ka

5 0
2 years ago
4) list 3 protest rights you have that are protected under the law. How can you protect these rights? George Floyd’s ?
Pavel [41]
Peaceful Protest, Signing Pettitons, contacting mayors/governors and writing emails/sending letters
7 0
2 years ago
Write the two balanced equations, one for the incomplete combustion of methane (to form carbon monoxide and water vapor), and an
kompoz [17]

Answer:

2CH_{4(g)} +3O_{2(g)} -->2CO(g)+4H_{2}O_{(g)}\\CH_{4(g)} +2O_{2(g)} -->CO_{2(g)} +2H_{2}O_{(g)} \\

Explanation:

2CH_{4(g)} +3O_{2(g)} -->2CO(g)+4H_{2}O_{(g)}\\CH_{4(g)} +2O_{2(g)} -->CO_{2(g)} +2H_{2}O_{(g)} \\

The incomplete combustion of alkanes, and other fuels actually, happens when there is a limited supply of oxygen. Instead of the fuel burning completely to produce carbon dioxide, it produces carbon monoxide instead.

This gas is harmful to jumans because it combines with haemoglobin in lood and takes up space that belongs to oxygen which can lead to suffocation or even death

6 0
2 years ago
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