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3 years ago

Why do elements in group 8A (the noble gases) tend not to gain or lose electrons?

Chemistry

1 answer:

Neko [114]3 years ago

5 0

Answer:

The noble gases have 8 valence electrons in their outermost electron shell. In other words, they have full out shells. These elements are highly stable.

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What is the mass of 4.75 moles of arsenic trichloride?

Lina20 [59]

Answer:

1 mole is equal to 1 moles Arsenic Trichloride, or 181.2806 grams.

Explanation:

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3 years ago

Lithium bromide dissociates in water according to the following thermochemical equation: LiBr(s) → Li+ (aq) + Br– (aq) ΔH = –48.

madreJ [45]

Answer:

Final temperature of water is $48.3^{0}\textrm{C}$

Explanation:

1 mol of LiBr releases 48.83 kJ of heat upon dissolution in water.

So, 2 moles of LiBr release $(2\times 48.83)kJ$ or 97.66 kJ of heat upon dissolution in water.

This amount of heat is consumed by 1000.0 g of water. Hence temperature of water will increase.

Let's say final temperature of water is $t^{0}\textrm{C}$ .

So, change in temperature ( $\Delta T$ ) of water is $(t-25)^{0}\textrm{C}$ or (t-25) K

Heat capacity (C) of water is $4.184\frac{J}{g.K}$

Hence, $m_{water}\times C_{water}\times \Delta T_{water}=97.66\times 10^{3}J$

where m is mass

So, $(1000.0g)\times (4.184\frac{J}{g.K})\times (t-25)K=97.66\times 10^{3}J$

or, $t=48.3$

Hence final temperature of water is $48.3^{0}\textrm{C}$

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3 years ago

Plz help this is due today........

Jobisdone [24]

A disease that targets any organism in the population with similar traits because more of the population live off of organisms if the organisms were to decrease then most of the population would decrease as well.

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3 years ago

D. liquid

erastovalidia [21]

Answer: H2O

Explanation: The given balanced chemical reaction is,

This reaction is a reversible reaction.

The rate of forward reaction will be,

The rate of backward reaction will be,

And at equilibrium the rate of reaction is equal to the rate of backward reaction divided by the rate of forward reaction.

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kap26 [50]

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3 years ago