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3 years ago

In an unconformity between two layers of rock, how is the lower layer usually described?

Chemistry

2 answers:

zepelin [54]3 years ago

7 0

A is the answer to the question

KengaRu [80]3 years ago

6 0

Answer:

Lower layer is older than the upper layer

Explanation:

The unconformity is defined as the time of non-deposition. In simple words, it a contact surface between the older and younger sedimentary type of rocks, that results from the erosion particles over a specific period of time.

These sediments are deposited over one another over a due course of time, forming sedimentary rock sequences due to the compaction and lithification process. From the sequences it can be determined that the layers of rock that are at the bottom are considered to be the oldest layers, whereas the layers that are on the top are the younger layers. This is also known as the law of Superposition.

Hence, the lower layers are older than the upper layers.

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Which statement best describes the effect of low ionization energies and low electronegativities on metallic bonding?

kramer

The statement that best describes the effect of low ionization energies and low electronegativities on metallic bonding is the first one - the valence electrons are easily delocalized.
Due to these low energies and negativities, valence electrons can be moved around quite easily and their positions may be altered quite drastically.

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3 years ago

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Convert 15.2 moles of K to atoms of K.

choli [55]

Answer:

$\boxed {\boxed {\sf 9.15*10^{24} \ atoms \ K}}$

Explanation:

To convert atoms to moles, Avogadro's Number must be used: 6.022*10²³.

This tells us the amount of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case it is the atoms of potassium. We can create a ratio.

$\frac {6.022*10^{23} \ atoms \ K }{ 1 \ mol \ K }$

Multiply by the given number of moles: 15.2

$15.2 \ mol \ K *\frac {6.022*10^{23} \ atoms \ K }{ 1 \ mol \ K }$

The moles of potassium cancel.

$15.2 *\frac {6.022*10^{23} \ atoms \ K }{ 1 }$

The denominator of 1 can be ignored.

$15.2 * {6.022*10^{23} \ atoms \ K }{$

Multiply.

$9.15344*10^{24} \ atoms \ K$

The original measurement of moles has 3 significant figures, so our answer must have the same. For the number we calculated that is the hundredth place. The 3 in the thousandth place tells us to leave 5.

$9.15*10^{24} \ atoms \ K$

In 15.2 moles of potassium, there are <u>9.15*10²⁴ atoms of potassium.</u>

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3 years ago

In the electrolysis of molten libr, which product forms at the cathode?

Ira Lisetskai [31]

Sodium metal forms at the cathode

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3 years ago

A saline solution with a mass of 400 g has 30 g of NaCl dissolved in it. What is the mass/mass percent concentration of the solu

maria [59]

(g solute/g solution)*100 = % mass/mass

30 g / 400 * 100

0,075 * 100

= 7,5% w/w

hope this helps!

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3 years ago

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PtichkaEL [24]

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3 years ago

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