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creativ13 [48]
3 years ago
11

A plane mirror is useful for seeing:

Chemistry
1 answer:
AURORKA [14]3 years ago
6 0
C. A nearly identical image.
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A solution was prepared by mixing 0.5000 m hno2 with 0.380 m no2-. ka = 4.58 x 10-4. calculate the ph of the solution. show work
adell [148]

pH of buffer can be calculated as:

pH=pKa+log[salt]/[Acid]

As ka = 4.58 x 10-4

Concentration of [Salt] that is NO2(-1)=0.380M

Concentration of [Acid] that is HNO2=0.500M

So, pH= -log(4.58*10^-4)+log((0.380)/0.500))

=3.21

So pH of solution will be 3.21

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3 years ago
Find the relative molecular mass of hydrated iron (II) sulphate FeSO4.7H2O
Pepsi [2]

Answer:

the relative molecular mass of hydrated iron (II) sulfate FeSO4.7H2O is 278.02

Explanation:

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3 years ago
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expeople1 [14]
<span>Classify is the answer hope this helps :)</span>
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if the pressure of a gas at constant volume is 3.5 atm at 100°c, what will the pressure be if the tempature is changed to 250°c?
Degger [83]
Sorry don't know this one

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3 years ago
Check the boxes next to events or trends that first occurred in science from about 1700. Darwin published his theory of natural
marishachu [46]

Check the boxes next to events or trends that first occurred in science from about 1700.

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/ Scientific societies and academies were formed.

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X The double-helix structure of DNA was determined.

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X Copernicus proposed a Sun-centered universe.

<span>-It was proposed in the 16th century.</span>

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X The Earth was proven to be spherical.

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4 0
3 years ago
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