compound forms acidic solution

compound forms acidic solution

 

 

물에 녹았을 때 산성 용액을 형성하는 화합물은?

SO2

NH3

BaO

Ba(OH)2

 

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답: SO2

 

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[키워드] 산성 산화물 기준

 

 

 

 

 

butadiene 2C4H6(g) → C8H12(g) rate constant

butadiene 2C4H6(g) → C8H12(g) 195 s 1.6×10^(-2) mol/L rate constant

 

 

The dimerization of butadiene

2C4H6(g) → C8H12(g)

was studied at 500. K, and the following data were obtained:

 

Assuming that

rate = –(Δ[C4H6] / Δt)

determine the form of the rate law, the integrated rate law,

and the value of the rate constant for this reaction.

 

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> rate = k[C4H6]^2

> (1 / C_t) = k•t + (1 / C_0)

> k = 0.01417

 

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[키워드] 2C4H6(g) → C8H12(g) 기준, 2차 반응 속도 기준

 

 

 

 

 

10 ppm CO를 mg/m3 농도로 환산

단, 25℃, 1기압 조건.

 

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답: 11.44 mg/m3

 

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[키워드] CO 기체 ppm 기준문서

 

 

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35 g potassium chlorine 67 g potassium chloride

 

 

A 35 g sample of potassium completely reacts with chlorine

to form 67 g of potassium chloride.

How many grams of chlorine must have reacted?

a. 67 g

b. 35 g

c. 32 g

d. 12 g

 

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답: c. 32 g

 

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[키워드] 화학량론 기준, 질량비로 계산 기준, 질량비로 계산 사전, 질량비 기준, 질량비 사전, 35 g K react Cl form 67 g KCl

 

 

 

 

 

40.8 g H2O의 gmol, kgmol, lbmol

40.8 g H2O의 g몰, kg몰, lb몰

 

 

다음 물질의 분자량과 g몰, kg몰, lb몰수를 구하시오.

a. 물(H2O) 40.8 g

 

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> 2.27 gmol

> 0.00227 kmol

> 0.00500 lbmol

 

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[키워드] lbmol 기준, lbmol dic

 

 

 

 

 

redox balance HPO3^2- + MnO4^- → PO4^3- + MnO4^2- (basic)

산화-환원 반응 완성하기 MnO4^- + HPO3^2- → MnO4^2- + PO4^3-

 

 

HPO3^2- + MnO4^- + OH^- → PO4^3- + MnO4^2-

 

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HPO3^2- + 2MnO4^- + 3OH^- → PO4^3- + 2MnO4^2- + 2H2O

 

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[키워드] redox HPO3^2- + MnO4^-, redox MnO4^- + HPO3^2-, redox HPO3^2- → PO4^3-, redox MnO4^- → MnO4^2-