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4 years ago

A molecule with the formula ab3 has a trigonal planar geometry. part a how many electron groups are on the central atom?

1 answer:

4 0

<span>Answer: 3 electron pairs Let's take BF3 for an example. When you find the valence electrons for this molecule --> [3+(3x6)], you'll get 24e-. You draw the Lewis dot structure and each of the F atom would have six dots around it (a total of 18 because there's 3 F atoms) and the B would have three lines [one line attached to each F. One line would equal to 2 valence electrons] and you get a total of 24 valence e-. The question asks how many groups are on the CENTRAL atom, meaning on the B. It would be three</span>

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A gas has a volume of 1.50mL at 1.89atm. What is the volume when the pressure is 2.75atm? What is the name of the gas law used t

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Explanation:

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3 years ago

How is ethanol made from sugar soloution. What is the process called?

Mice21 [21]

Answer:Ethanol can be made by a process called fermentation. During fermentation, sugar (glucose) from plant material is converted into ethanol and carbon dioxide. ... 90 per cent of the world's ethanol is made using fermentation.

Explanation:

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3 years ago

What must occur in order for a chemical reaction to be specifically classified as endothermic instead of

Anettt [7]

Answer:

Endothermic

Explanation:

Heat is retained while exothermic means heat is released

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3 years ago

Read 2 more answers

Identify the highest energy molecular process that occurs when a molecule absorbs a microwave photon.

ElenaW [278]

The question is incomplete, the complete question is;

Identify the highest energy molecular process that occurs when a molecule absorbs a microwave photon

a) electronic excitation

b) bond breakage

c) molecular vibration

d) molecular rotation

Answer:

molecular rotation

Explanation:

Microwaves are part of the electromagnetic spectrum. They are lower energy, lower frequency radiation.

When molecules absorb infrared radiation, they transition between the rotational states of the molecule.

Hence, the highest energy molecular process that occurs when a molecule absorbs a microwave photon is molecular rotation.

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3 years ago

When Thomas Edison first sold electricity, he used zinc coulometers to measure charge consumption. (In a coulometer the cathode

IrinaK [193]

Answer:

The answer is " $42537.93 \ C$ ".

Explanation:

Molar mass : $Z_n = 65.38 \ \frac{g}{mol}\\\\$

$\to Zn^{2+} + 2e^{-} = Zn\\\\$

$\therefore\\\\ \to 65.38 \ g \ of\ Z_n \ require: \\\\ \to 2 \times 96500\ C\\\\\to 14.41 \ g\ require,\\\\ \to \frac{(14.41 \times 2 \times 96500)}{65.38} \ \frac{g}{mol} = 42537.93 \ C$

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3 years ago