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tester [92]
4 years ago
10

What is the [H+] of a solution with a pH of 6.6? Use a scientific calculator.

Chemistry
2 answers:
mr Goodwill [35]4 years ago
8 0
<span>pH is a logarithmic scale as seen below:

   pH = -log([H+])

   Please note the negative sign in front of the log function. As concentration of H+ ions increases, the pH will decrease. If pH = 6.6, then:

   pH = 6.6 = -log([H+])

   You can multiple both sides by -1. Then, to get rid of the log function, set both sides of the equation equal to 10^ as shown below:

   10^(-6.6) = [H+]

   10^(-6.6) = 2.511x10^-7,</span>
svetoff [14.1K]4 years ago
7 0
8.3 × 106 - trust me, it's actually right. You can use the calculator to see if I'm correct. Punch in <span>8.3 × 106 = 6.6</span>
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an astronaut on the moon throws a ball at a velocity of 4.1 m/s straight up. assuming the gravity on the moon is 1/6 that of ear
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Answer:

(1/2)(1.62) t^2 = 1.4

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Explanation:

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5 0
3 years ago
A steel block has a volume of 0.08 m³ and a density of 7,840 kg/m³. What is the force of gravity acting on the block (the weight
Rama09 [41]
Correct Answer: Option a. 6150.64 N

Weight (w) is defined as:

w = mg

So, first we need to find the mass (m) of the steel block using its volume and density.

Mass = Density x Volume 
So,
m = 0.08 x 7840 = 627.2 g

Using value of m and g = 9.807, we get

w = 627.2 x 9.807 = 6150.95 Newtons

Therefore, option a is the correct answer. 
The slight difference is because the value of g is rounded of to 3 decimal cases. 
6 0
3 years ago
All electromagnetic waves are produced by neutral particles. True or false please answer quick
34kurt

Answer:

true

Explanation:

6 0
3 years ago
Read 2 more answers
Half of the first 18 elements have an odd number of electrons, and half have an even number. Show why atoms of these elements ar
asambeis [7]

Answer:

Diamagnetism in atom occurs whenever two electrons in an orbital paired equalises with a total spin of 0.

Paramagnetism in atom occurs whenever at least one orbital of an atom has a net spin of electron. That is a paramagnetic electron is just an unpaired electron in the atom.

Here is a twist even if an atom have ten diamagnetic electrons, the presence of at least one paramagnetic electron, makes it to be considered as a paramagnetic atom.

Simply put paramagnetic elements are one that have unpaired electrons, whereas diamagnetic elements do have paired electron.

The atomic orbital and radius increases by gaining electron linearly so even electron numbered atoms are diamagnetic while the odd electron numbered atoms are paramagnetic.

Running through the first 18 elements one can observe that there is an alternative odd number of electrons and an even number proofing that that half of the first 18 elements shows paramagnetism and diamagnetism respectively.

Explanation:

3 0
3 years ago
What is the pressure inside a cylinder when the volume changes from 12.49 dm3 to 47.32 dm3 with an initial pressure of 7.257 x 1
zvonat [6]

Answer:

<u>The pressure inside becomes : 202.646 KPa</u>

Explanation:

Given ,

  • <em>The temperature inside the cylinder is constant</em>
  • <em>The number of moles of the gas inside the cylinder will also be constant because it's a closed one.</em>

<em>Now according Boyle's law , </em>

  • <em>The pressure of a gas of fixed mass is inversely proportional to its volume at a constant temperature.</em>

Thus ,

P_1V_1=P_2V_2\\

  • P_1 is the initial pressure 7.257*102*10^3 Pa
  • P_2 is what we need to find
  • V_1 = 12.49dm^3 - initial volume
  • V_2 = 47.32dm^3 - final volume

∴

7.527*102*10^3*12.49=P_2*47.32\\P_2=2.02646*10^5Pa

The pressure inside becomes : 202.646 KPa

4 0
3 years ago
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