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valentinak56 [21]
3 years ago
5

How many moles are in 64 grams of methane, CH4? A. 4 B. 32 C. 64 D. 13

Chemistry
1 answer:
ss7ja [257]3 years ago
8 0

Answer:

A. 4.

Explanation:

  • We can use the relation:

<em>no. of moles (n) = mass/molar mass.</em>

mass = 64.0 g, molar mass = 16.0 g/mol.

∴ no. of moles (n) = mass/molar mass = (64.0 g)/(16.0 g/mol) = 4 mol.

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Would you expect the wavelength of maximum absorbance for [Cu(NH3)4]2+ to be greater than or less than the wavelength of maximum
DENIUS [597]

Answer:

Less

Explanation:

Since [Cu(NH3)4]2+ and [Cu(H2O)6]2+ are Octahedral Complexes the transitions between d-levels explain the majority of the absorbances seen in those chemical compounds. The difference in energy between d-levels is known as ΔOh (ligand-field splitting parameter) and it depends on several factors:

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A partial spectrochemical series listing of ligands from small Δ to large Δ:

I− < Br− < S2− < Cl− < N3− < F−< NCO− < OH− < C2O42− < H2O < CH3CN < NH3 < NO2− < PPh3 < CN− < CO

Then NH3 makes the ΔOh higher and it requires a higher energy light to make the transition, which means a shorter wavelength.

7 0
3 years ago
The rising magma that may result from this type of plate movement may produce<br><br> HELP
nirvana33 [79]

Volcanic islands, seamounts, guyouts

Explanation:

The magma rising from this type of plate movement may produce under water volcanic activities.

The magma here would be mafic - ultramafic because it is produced from melting of oceanic plates.

As the subducting oceanic plate melts and begins to rise, it will settle and cool on the ocean floor resulting in the formation of massive and extensive seamounts.

With time, they outgrow the ocean level and forms volcanic Islands.

learn more:

lithosphere brainly.com/question/9582362

#learnwithBrainly

7 0
3 years ago
Choose the most alkaline substance in the group.
slava [35]

Answer:

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Explanation:

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True:

The result is two genetically identical daughter nuclei.
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uranmaximum [27]

Titanium is ductile and has high resistance for heat despite its strength.

Titanium (Ti), is a  Group 4b chemical transition  element, it has a silvery gray appearance. Its characteristics are as follows

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Because of these features, Titanium is widely used in building  aircraft, missiles, and ships and also in the production  of  prosthetics.

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