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Andrej [43]
3 years ago
10

How does a star form?

Chemistry
2 answers:
Alinara [238K]3 years ago
5 0
The answer would be D
AveGali [126]3 years ago
3 0

Answer:

B

Explanation:

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A rigid vessel filled to 0.8 of its volume with liquid nitrogen at its normal boiling point is allowed to warm to 25°C. What pre
rodikova [14]

Answer:

704.25 atm

Explanation:

From the ideal gas equation

PV = nRT

P = nRT/V

Molar volume (V/n) = 34.7 cm^3/mol, n/V = 1/34.7 = 0.0288 mol/cm^3

R = 82.057 cm^3.atm/mol.K

T = 25°C = 25+273 = 298 K

P = 0.0288 × 82.057 × 298 = 704.25 atm

5 0
3 years ago
Un recipiente cerrado, de 4,25 L, con tapa móvil, contiene H2S(g) a 740 Torr y 50,0°C. Se introduce en ese recipiente N2(g) a te
yulyashka [42]

Answer:

n_{N_2}=6.41mol

Explanation:

¡Hola!

En este caso, teniendo en cuenta la información dada por el problema, inferimos que primero se debe usar la ecuación del gas ideal con el fin de calcular las moles de gas que se encuentran al inicio del experimento:

PV=nRT\\\\n=\frac{RT}{PV} \\\\n=\frac{0.08206\frac{atm*L}{mol*K}*(50.0+273.15)K}{740/760atm*4.25L}\\\\n=6.41mol

Seguidamente, usamos la ley de Avogadro para calcular las moles finales, teniendo el cuenta que el volumen final es el doble del inicial (8.50 L):

n_2=\frac{6.41mol*8.50L}{4.25L}\\\\n_2=12.82mol

Quiere decir que las moles de N2(g) que se agregaron son:

n_{N_2}=12.81mol-6.41mol\\\\n_{N_2}=6.41mol

¡Saludos!

8 0
3 years ago
Which has more moles of carbon atoms, 169.2g of vitamin B6 or 176.1g of vitamin C?
ki77a [65]
169.2g of vitamin B6
8 0
3 years ago
Consider an atom that has an electron in an excited state. The electron falls to a lower energy level. What effect does that hav
irinina [24]

On absorbing energy, an electron moves to an excited state (unstable state) from its ground state (stable state).  Since the electron is in unstable state so it tends to rearrange itself to return to its lowest energy state.  On returning to lowest energy state which is stable, it releases energy in the form of light.

Hence, option A that is the electron releases energy in the form of light on falling to lower energy state from excite state.

3 0
3 years ago
Read 2 more answers
Where is the holy place of hindiusm​
andreev551 [17]

Explanation:

The seven holiest Hindu cities are said to be the sites of events recounted in mythological texts: Kashi (modern Varanasi, Uttar Pradesh), where the god Shiva founded a shrine of purification; Oudh (modern Ayodhya, Uttar Pradesh), birthplace of the god Rama; Mathura (in Uttar Pradesh), scene of Krishna's nativity; ...19 may. 2020

3 0
3 years ago
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