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miss Akunina [59]
3 years ago
7

Can someone help please I will mark brainylest

Chemistry
1 answer:
Kryger [21]3 years ago
7 0

Answer:10,500

Explanation:

Multiply all the following except where it says mw=70.9, then divide 70.9 by the sum of multiplying!!

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Snezhnost [94]
Relatively few hydrogen atoms
5 0
3 years ago
2KMnO4= K2MnO4+ MnO2+O2 how many grams of KMnO4 are required to produce 1.60 grams of O2
Sergeu [11.5K]

Answer: 15.8 g of KMnO_4 will be required to produce 1.60 grams of O_2

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} O_2=\frac{1.60g}{32g/mol}=0.05moles

2KMnO_4\rightarrow K_2MnO_4+MnO_2+O_2

According to stoichiometry :

As 1 mole of O_2 is given by = 2 moles of KMnO_4

Thus 0.05 moles of O_2 is given by =\frac{2}{1}\times 0.05=0.10moles  of KMnO_4

Mass of KMnO_4=moles\times {\text {Molar mass}}=0.10moles\times 158g/mol=15.8g

Thus 15.8 g of KMnO_4 will be required to produce 1.60 grams of O_2

5 0
3 years ago
7. Who was the first explorer from France to reach North America? A. Giovanni da Verrazano C. Louis Joliet B. Jacques Cartier D.
Tanzania [10]
Jacques Cartier is the first explorer to reach North America
6 0
3 years ago
Read 2 more answers
In a paper chromatography analysis, three pigments, A, B, and C, were dissolved in a solvent. A is slightly polar, B is highly p
photoshop1234 [79]

Answer:It would depend on the eluent solvent what we use ,If we would use a polar solvent than B will be appear first followed by c and then A on the chromatography strip.

If we use non-polar eluent solvent than A will be separated first followed by C and thenB on the chromatography strip.

Explanation:

Separation using paper chromatography is dependent upon the polarity of various  pigments .

A polar pigment would move ahead in case of polar solvent used and a non-polar pigment would move ahead when we use a non-polar solvent.

So separation would occur in order of polarity  of various pigments in a given solvent.

The amount of distance travelled by each component (or pigment or spot) can be calculated using the formula for retention factor:

Rf= Distance travelled by pigment spot or solute/Distance travelled by eluent solvent

Rf= Retention factor

Retention factor is basically the ratio of distance tarvelled by the pigment or spot to the ratio of distance travelled by the solvent.

8 0
3 years ago
How does artificial selection change a population over time?
kozerog [31]
The process of domestication is called artificial selection.Like natural selection, artificial selection acts by allowing differential reproductive success to individuals with different genetically determined traits in order to increase the frequency of desirable traits in the population.



You can use quillbot.com to reword it
7 0
3 years ago
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