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UkoKoshka [18]
3 years ago
13

What is the lead concentration of a saturated solution of lead(II) sulfate containing 0.020 M Na2SO4? Ksp for PbSO4 = 6.3x10-7.

Chemistry
1 answer:
labwork [276]3 years ago
8 0

Answer:

i want to help but  i   d   k. the answer :( sorry i couldnt help

Explanation:

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Melting point 134-137C you range 125-146C is sample pure?
nika2105 [10]
No because the deviation from the theoretical value is quite high and the temperature range of your sample is too wide.
5 0
3 years ago
When two metals touch in the mouth, a small shock is created. this is known as<br> a?
Over [174]
 <span>When two metals touch in the mouth, a small shock is created. this is known as a </span>galvanic action
7 0
4 years ago
You measured the mass of Coke as 21.36 grams and the volume as 20.50 ml. What is the density of Coke in
ahrayia [7]

Answer:

<h3>The answer is 1.04 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass of coke = 21.36 g

volume = 20.5 mL

So we have

density =  \frac{21.36}{20.50}  \\  = 1.0419512...

We have the final answer as

<h3>1.04 g/mL</h3>

Hope this helps you

4 0
3 years ago
Which of these statements best describes the relationship between matter, pure substances, and mixtures?
borishaifa [10]
The answer you are looking for is the second option, "<span>Matter can be divided into two groups: pure substances and mixtures."

A pure substance can describe a pure element or chemically bonded elements. A pure substance cannot be broken down into further substances. An example of these would be Fe (iron) or O2 (oxygen).

A mixture is a structure made from physically combining different non-bonded substances. An example of a mixture is blood.

Both pure substances and mixtures are types of matter.</span>
3 0
3 years ago
I need help please, thanks!
oee [108]

Answer:

This question is somehow not clear, because a typical human eye can notice objects which have wavelengths from about 380 to 740 nanometers. This is called visible spectrum (the portion of the electromagnetic spectrum that is visible to the human eye). Electromagnetic radiation in this range of wavelengths is called visible light or simply light.

Someone even can see extra colors - they able to see beyond the visible spectrum. The reason that the human eye can see the spectrum is because those specific wavelengths stimulate the retina in the human eye. The human retina can only detect incident light that falls in waves from about 380 to 740 nanometers long, so we can’t see microwave or ultraviolet wavelengths. This also applies to infrared lights which has wavelengths longer than visible and shorter than microwaves, thus being invisible to the human eye.

In conclusion, the human eye can not notice that objects with wavelength not in the range of 380 to 740 nanometers.

Explanation:

5 0
3 years ago
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