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3 years ago

The __ _ is the outer part of the atom?

1 answer:

3 0

Possibly electron shells, the electrons in the outermost occupied shell (or shells) determine the chemical properties of the atom..

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A ball has a volume of 6.35 liters and is at a temperature of

kati45 [8]

Answer:

Absolute pressure inside the ball: $1.45\; \rm atm$ .
Number of moles of air particles inside the ball, by the ideal gas law: approximately $0.37\; \rm mol$ .

Explanation:

The gauge pressure inside the ball gives the absolute pressure inside the ball, relative to the atmospheric pressure outside the ball. In other words:

$\begin{aligned}& \text{Gauge Pressure} \\ &= \text{Absolute Pressure} - \text{Atomspheric Pressure}\end{aligned}$ .

Rearrange to obtain:

$\begin{aligned}& \text{Absolute Pressure} \\ &= \text{Gauge Pressure} + \text{Atomspheric Pressure} \\ &= 0.45\; \rm atm + 1.00 \; \rm atm = 1.45\; \rm atm\end{aligned}$ .

Look up the ideal gas constant. This constant comes in a large number of unit combinations. Look for the one that takes $\rm atm$ for pressure and $\rm L$ for volume.

$R = 0.082057\; \rm L \cdot atm \cdot K^{-1}\cdot mol^{-1}$ .

Convert the temperature to absolute temperature:

$T = 27.0\; \rm ^\circ C \approx (27.0 + 273.15)\; \rm K = 300.15\; \rm K$ .

Assume that the gas inside this ball acts like an ideal gas. Apply the ideal gas law $P \cdot V = n \cdot R \cdot T$ (after rearranging) to find the number of moles of gas particles in this ball:

$\begin{aligned}n &= \frac{P \cdot V}{R \cdot T} \\ &= \frac{1.45\; \rm atm \times 6.35\; \rm L}{0.08205 \; \rm L \cdot atm \cdot K^{-1} \cdot mol^{-1} \times 300.15\; \rm K} \approx 0.37\; \rm mol\end{aligned}$ .

(Rounded to two significant figures, as in the pressure gauge reading.)

3 0

4 years ago

What branch of science studies The Periodic Table?

Mrac [35]

Answers:

1. Chemistry

2. Cold

3. Heat

4. Protons and neutrons

5. Positive

6. Neutral

7. True

8. Nucleus

9. Protons

10. Nobel gasses

11. Dmitri Mendeleev

12. the bottom of the square

13. True

14. Helium

8 0

3 years ago

. One mole of N2O4 contains ___________.

ivanzaharov [21]

One molecule of N2O4 contains

two nitrogen
four oxygen

7 0

3 years ago

Methane undergoes combustion. Which products form?

Aleksandr [31]

Methane is a carbon compound which undergoes combustion to release energy and form bi production which are Carbon dioxide ( CO2 ) and  Water ( H20 ).

the balanced chemical equation for the reaction is : -

CH4 + 2 O2 =》CO2 + 2 H2O

3 0

3 years ago

Ome fire extinguishers contain liquid carbon dioxide Suggest how carbon dioxide

melisa1 [442]

Answer:

The CO2 Extinguisher Cannisters contain carbon dioxide in liquid form, and when the extinguisher is let off the liquid is released into the air neutralising the oxygen that the fire is feeding on, disabling the fires ability to spread.

8 0

3 years ago

The ____________ ___________ is the outer part of the atom?

The __ _ is the outer part of the atom?