3 years ago

20 POINTS IF YOU CAN ANSWER THIS CORRECTLY, PLEASE!

Chemistry

1 answer:

xeze [42]3 years ago

7 0

Answer: a

Explanation: trust me

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Na2 So4 identify the nature of this reaction

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What are examples of methodological errors in a chemistry lab?

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i) Use of wrong Indicator in acid base titration.

ii) Addition of chemicals with improper sequence.

iii) Wrong technique used during chemical reaction.

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4 years ago

Which procedure confirms the presence of F ions, CI ions, Br ions, I ions?

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F-, no precipitate. Cl-, white precipitate. Br-, very pale cream precipitate. I-, very pale yellow precipitate.

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What is the appropriate chemical formula for Iron(III) Sulfate? Sulfate is SO_4^2 Fe3SO4 O a . Fe2(SO4)3 O b. O c. Fe2SO4 O d. F

AnnyKZ [126]

Answer: The chemical formula of Iron (III) sulfate is $Fe_2(SO_4)_3$

Explanation:

Iron is the 26th element of periodic table having electronic configuration of $[Ar]3d^64s^2$ .

To form $Fe^{3+}$ ion, this element will loose 3 electrons.

Sulfate ion is a polyatomic ion having chemical formula of $SO_4^{2-}$

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

So, the chemical formula for Iron (III) sulfate is $Fe_2(SO_4)_3$

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Answer:Nitrogen dioxide reacts with the sunlight and combines with particles from smoke and soot to form industrial smog. is true

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