3 years ago

Which of the following is true about a compound and its elements?

2 answers:

7 0

They can change properties completely
They can be separated 
They form a new set of elements and compounds 
The elements become part of the original compounds

Ahat [919]3 years ago

6 0

Answer:

The properties of a compound are different than the properties of its elements.

Explanation:

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Every atom's goal is to get ________ electrons in its valence shell.

sdas [7]

Every atom tends to form configuration of noble gas , with the 8 electrons in valence shell.

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3 years ago

Which of the following is a double replacement reaction? Ca(OH)2 + H2SO4 → CaSO4 + 2H2O CH4 + 2O2 → CO2 + 2H2O 8Fe + S8 → 8FeS Z

abruzzese [7]

That would be the first option Ca(OH)2 + H2SO4 → CaSO4 + 2H2O.

The Ca replaces the H2 in H2SO4, and the H2 replaces the Ca is Ca(OH)2.

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3 years ago

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A 25. 0-ml sample of 0. 150 m hydrocyanic acid is titrated with a 0. 150 m naoh solution. What is the ph beforeany base is added

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Answer:

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2 years ago

Consider the reaction below. Initially the concentration of SO2Cl2 is 0.1000 M. Solve for the equilibrium concentration of SO2Cl

tensa zangetsu [6.8K]

Answer:

$[SO_2Cl_2] = 0.09983 M$

Explanation:

Write the balance chemical equation ,

$SO_2Cl_2((g) = SO_2(g) + Cl_2(g)$

initial concenration of $SO_2Cl_2((g) =0.1M$

lets assume that degree of dissociation= $\alpha$

concenration of each component at equilibrium:

$[SO_2Cl_2] = 0.1-0.1\alpha$

$[SO_2] = 0.1\alpha$

$[Cl_2] = 0.1\alpha$

$Kc =\frac{0.1\alpha \times 0.1\alpha}{0.1-0.1\alpha}$

$Kc =\frac{0.1\alpha \times \alpha}{1-\alpha}$

as $\alpha$ is very small then we can neglect $1-\alpha$

therefore ,

$Kc ={0.1\alpha \times \alpha}$

$\alpha =\sqrt{\frac{Kc}{0.1}}$

$\alpha = 1.73 \times 10^{-3}$

Eqilibrium concenration of $[SO_2Cl_2] = 0.1-0.1\alpha = 0.1-0.1\times 0.00173$

$[SO_2Cl_2] = 0.09983 M$

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3 years ago

What is the zonecreated if force of separation occurs?

Free_Kalibri [48]

I can’t answer you but here have a meme

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3 years ago