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4 years ago

7

A model of an atom is shown above. The blue dots represent electrons, and the red dot represents the nucleus. This model accurat

ely represents

2 answers:

sleet_krkn [62]4 years ago

8 0

The body of an atom including its parts plus you sort of need a model to see what your dealing with and trying to answer

NARA [144]4 years ago

8 0

the answer is "that the nucleus is located at the center of the atom."

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What is the electron dot structure for beryllium and oxygen when they combine into a compound

Shtirlitz [24]

Answer:

The formula unit for beryllium oxide is BeO

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3 years ago

Two systems with heat capacities 19.9 J mol-1 K-1 and 28.2 ] mol 1 K-1 respectively interact thermally and come to an equilibriu

MAVERICK [17]

Answer : The initial temperature of system 2 is, $19.415^oC$

Explanation :

In this problem we assumed that the total energy of the combined systems remains constant.

$-q_1=q_2$

$m\times c_1\times (T_f-T_1)=-m\times c_2\times (T_f-T_2)$

The mass remains same.

where,

$C_1$ = heat capacity of system 1 = 19.9 J/mole.K

$C_2$ = heat capacity of system 2 = 28.2 J/mole.K

$T_f$ = final temperature of system = $30^oC=273+30=303K$

$T_1$ = initial temperature of system 1 = $45^oC=273+45=318K$

$T_2$ = initial temperature of system 2 = ?

Now put all the given values in the above formula, we get

$-19.9J/mole.K\times (303-318)K=28.2J/mole.K\times (303-T_2)K$

$T_2=292.415K$

$T_2=292.415-273=19.415^oC$

Therefore, the initial temperature of system 2 is, $19.415^oC$

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4 years ago

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Answer:

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Explanation:

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3 years ago

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Explanation:

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3 years ago

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3 years ago

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