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3 years ago

What is the the electron configuration for the element ge. use the noble gas preceding for the inner electron?

Chemistry

1 answer:

Vlad1618 [11]3 years ago

3 0

[Ar] 3d^10 4s^2 4p^2

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Ethanol, CH.0, is common beverage alcohol. At its boiling point of 78.5 °C, the enthalpy of vaporization of ethanol is 38.6 kJ/m

garik1379 [7]

Answer:

209.8 kilo Joules heat is required to vaporize 250 g of ethanol at 78.5 °C.

Explanation:

Mass of an ethanol = 250 g

Molar mass of ethanol = 46 g/mol

Moles of an ethanol = $n=\frac{250 g}{46 g/mol}=5.435 mol$

Enthalpy of vaporization of ethanol = $\Delta H_{vap} =38.6 kJ/mol$

Heat required to vaporize 250 g of ethanol at 78.5 °C : Q

$Q=n\times \Delta H_{vap}$

$=5.435 mol\times 38.6 kJ/mol=209.7826 kJ\approx 209.8kJ$

Q = 209.8 kilo Joules

6 0

3 years ago

IT DUE TODAY WILL GIVE 100 BRAINLY POINTS AND BRAINLEST IF YOU HELP THIS IS FOR SCIENCE CLASSThis project will allow you to “see

NISA [10]

Answer: You are using DC current

Explanation: DC current stands "Direct Current" or "Direct contact". Step 5 has keywords of direct contact, like "Connect", "Attaching" and "Attach".

Hope this helps 8)

6 0

2 years ago

Butter melting on warm pancakes is<br> conduction<br> convection<br> radiation

yuradex [85]

Convection
because convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

6 0

3 years ago

What happens to a sheet of copper as the average kinetic energy of the copper molecules decreases?

JulsSmile [24]

Answer:

<h2>It gets cooler.</h2>

Explanation:

<h2>Hopes this helps. Mark as brainlest plz!</h2>

8 0

3 years ago

Read 2 more answers

Naturally occurring zirconium exists are five isotopes. axe with a mass of 89.905 u(51.45%); Zr with a mass of 90.906 u (11.22%)

Anton [14]

Isotope 1: 89.905 * 51.45 = 4625.61225 / 100 = 46.2561225
Isotope 2: 90.906 * 11.22 = 1019.96532 / 100 = 10.1996532
Isotope 3: 91.905 * 17.15 = 1576.17175 / 100 = 15.7617075
Isotope 4: 93.906 * 17.38 = 1632.08628 / 100 = 16.3208628
Isotope 5: 95.908 * 2.08 = 268.5424 / 100 = 2.685424

46.2561225 + 10.1996532 + 15.7617075 + 16.3208628 + 2.685424 = 91.22377
actual mass Zr = about 91.22

8 0

3 years ago