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matrenka [14]
3 years ago
11

How many mL. of 0.200 M Pb(NOs)2 solution are needed to obtain 0.875 grams of Pb(NO:)2?

Chemistry
1 answer:
notka56 [123]3 years ago
3 0

Answer:

Vsln=13.2mL

Explanation:

MwPb(NO3)2=331.2g/mol

⇒ Vsln = (1L Pb(NO3)2/0.200molPb(NO3)2) * (molPb(NO3)2/331.2gPb(NO3)2) * 0.875gPb(NO3)2

⇒  Vsln = 0.0132L (13.2mL)

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Density equals mas divided by volume. You know the density and mass so use it to solve for the volume.

d= m/v
d= 19.3 g/mL
m= 50g
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Plug it in.    19.3= 50/v

To solve for v you do the opposite of 50 divided by v which is 50 time v.
That cancels v from the right side of the equation.  Do the same on the other side(times v)
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Now just divide both sides by 19.3 to get v alone.

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There are 115 protons in the element 115 and due to the large number of protons, the element does not exist in nature.

Also, the element can not be isolated in nature that is IUPAC had to require an independent confirmation of the element.

<h3>What is element 115?</h3>

We know that the periodic table is an arrangement of the atoms in order of increasing atomic number. We know that the larger the atomic number of the element, the less likely that the element would be stable in nature. The element that have been named 115 is called Moscovium and was discovered in Moscow as a product of a radioactive experiment. The number of protons in element 115 is 115 protons

Generally, the element number 115 does not exist in nature because if the proton number in an element exceeds 82, the repulsion between the protons would make it almost impossible for the nucleus to be a stable nucleus.

The reason why IUPAC had to request an independent confirmation of the element is because it does not exist in nature.

Learn more about element 115:brainly.com/question/27914234

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yarga [219]
Combustion. As they are heated at extreme temperatures to form ammonia through Haber process
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Chemical reactions that require oxygen are called _____ while those that do not require oxygen are considered _____.
Nostrana [21]

Answer:

The correct answer are aerobic and anaerobic.

Explanation:

The decomposition reaction of organic matter in the presence of oxygen is called aerobic reaction and is the most efficient process for releasing energy from organic matter. Anaerobic decomposition reactions are those in which oxygen is not present. Anaerobic decomposition of carbohydrates or sugars is called fermentation and anaerobic bacterial decomposition of proteins is called putrefaction.

Have a nice day!

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2 years ago
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