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Wittaler [7]
3 years ago
13

Which statement accurately describes the charge of the nucleus of an atom? A. The nucleus can be either positively charged or ne

utral. B. The nucleus never has an electrical charge. C. The nucleus always has a positive charge. D. The charge of a nucleus can change from positive to negative.
Chemistry
2 answers:
BARSIC [14]3 years ago
3 0
<span>A. The nucleus can be either positively charged or neutral.

The nucleus is located at the center of an atom wherein it contains the protons and the neutrons.</span>
kupik [55]3 years ago
3 0

Answer: Option (A) is the correct answer.

Explanation:

An atom contains three sub-atomic particles namely protons, neutrons and electrons.

The nucleus of an atom contains protons and neutrons only. Whereas electrons revolve around the nucleus. Protons are positively charged, neutrons have no charge and electrons are negatively charged.

When an atom is neutral then number of protons equal the number of electrons. Hence, the atom becomes neutral as positive charge is equal to negative charge and thus gets cancelled.

Therefore, a nucleus can be either positively charged or neutral.

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mixas84 [53]

Answer :

Charles's Law : It is defined as the volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

Mathematically,

V\propto T

                                Boiling water bath        Cool bath 1       Cool bath 2

Temperature (⁰C)                  99                              17                       2

Temperature (K)(T)    273+99=372             273+17=290      273+2=275

Volume of water                  0.0                             27.0                34.0

in cool flask (mL)

Volume of water=              135.8                           135.8               135.8

Air in flask (mL)

Volume of air                    135.8                           108.8               101.8

in cool flask (V)

\frac{V}{T}                                \frac{135.8}{372}=0.365             \frac{108.8}{290}=0.375         \frac{101.8}{275}=0.370

The graph volume versus temperature for a gas is shown below.

3 0
3 years ago
A 1.2 L weather balloon on the ground has a temperature of 25°C and is at atmospheric pressure (1.0 atm). When it rises to an el
icang [17]

Answer:

The temperature of the air at this given elevation will be 53.32425°C

Explanation:

We can calculate the final temperature through the combined gas law. Therefore we will need to know 1 ) The initial volume, 2 ) The initial temperature, 3 ) Initial Pressure, 4 ) Final Volume, 5 ) Final Pressure.

Initial Volume = 1.2 L ; Initial Temperature = 25°C = 298.15 K ; Initial pressure = 1.0 atm  ; Final Volume = 1.8 L ; Final pressure = 0.73 atm  

We have all the information we need. Now let us substitute into the following formula, and solve for the final temperature ( T_2 ),

P_1V_1 / T_1 = P_2V_2 / T_2,

T_2 = P_2V_2T_1 / P_1V_1,

T_2 = 0.73 atm * 1.8 L * 298.15 K / 1 atm * 1.2 L = ( 0.73 * 1.8 * 298.15 / 1 * 1.2 ) K = 326.47425 K,

T_2 = 326.47425 K = 53.32425 C

7 0
2 years ago
Many times, during a chemical reaction, energy is given off. this type of chemical reaction can be termed
WITCHER [35]
Physical can be seen
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3 years ago
Giving brainiest to whoever answers correctly.
Digiron [165]

Answer:250

Explanation:

5 0
3 years ago
How is the way a mixture is combined different from how a compound is combined?
artcher [175]

Mixture is composed of molecules of different types. A compound can only be separated through chemical means. While a compound is a pure substance that contains 2 or more elements chemically combined together while a mixture are formed when two substances are added together without chemical bonds being formed.

7 0
3 years ago
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