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UkoKoshka [18]
3 years ago
9

And a 40N Torce in a southeriy direction?

Chemistry
1 answer:
kenny6666 [7]3 years ago
3 0

Answer:

C.

Explanation: because potential energy is the starting point before it moves. nothing has to be done.

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Calculate the ph of a 0.20 m solution of iodic acid (hio3, ka = 0.17).
saveliy_v [14]
Iodic acid partially dissociates into H+ and IO3- 
Assuming that x is the concentration of H+ at equilibrium, and sine the equation says the same amount of IO3- will  be released as that of H+, its concentration is also X.  The formation of H+ and IO3- results from the loss of HIO3 so its concentration at equilibrium is 0.20 M - x
Ka = [H+] [IO3-] / [HIO3]; 
<span>Initially, [H+] ≈ [IO3-] = 0 and [HIO3] = 0.20; </span>
<span>At equilibrium [H+] ≈ [IO3-] = x and [HIO3] = 0.20 - x; </span>
<span>so 0.17 = x² / (0.20 - x); </span>
<span>Solving for x using the quadratic formula: </span>
<span>x = [H+] = 0.063 M or pH = - log [H+] = 1.2.</span>
7 0
3 years ago
Determine whether or not each mixture is a buffer. check all that apply. check all that apply. hcl and hf hf and naf hc2h3o2 and
maksim [4K]
Hello!

A buffer is composed of a weak acid and its conjugate base or a weak base and its conjugate acid. From the given list:

HCl and HF: Strong Acid and Weak Acid. NOT BUFFER

HF and NaF: Weak Acid and Conjugate Base. BUFFER

HC₂H₃O₂ and  KC₂H₃O₂: Weak Acid and Conjugate Base. BUFFER

NaOH and NH₃: Strong Base and Weak Base. NOT BUFFER.

Have a nice day!
7 0
3 years ago
Which answer best describes an alpha particle
scZoUnD [109]
A positively charged nucleus with two protons and two neutrons hope this helps :)
4 0
2 years ago
The catalytic conversion of ammonia to nitric oxide is the first step in a three-step process, which ultimately results in nitri
Aleksandr-060686 [28]
The answer is B- 3,2,3,3
4 0
2 years ago
Which property of water contributes most to the ability of fish in lakes to survive very cold winters?.
Valentin [98]

Answer:

And that means fish must be able to survive down here. This is due to a special property of water: the elasticity of H2O. We know that when the temperature sinks below freezing, water first contracts and then expands as it begins to turn to ice. Ice, being lighter than water, floats.

Explanation:

The property of water that allows fish to survive in a lake that is frozen over is the fact that ice is less dense than liquid water.

6 0
2 years ago
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