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3 years ago

A)The plates are all moving in the same direction

Chemistry

1 answer:

nevsk [136]3 years ago

7 0

I believe the answer is C) there is an obvious reasoning for this all you have to do is eliminate answers that don't seem right for example, A)the plates are all moving the same direction every plate moves in different directions. B) The plates are all the same size. Well, it's really obvious that that is not true because every plate has its different shape and size. D) where two plates meet, they always move apart. If this were true, then we would never have earthquakes when plates meet earthquakes happen. so there for the answer is C)

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zalisa [80]

D volume
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3 years ago

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How many moles are equal to 2.41x10 24 formula units of sodium chloride?

ryzh [129]

There are 6.022 x 10^23 formula units per mole

2.41 x 10^24 / 6.022 x 10^23 = 4.00 moles of Sodium Chloride

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4 years ago

An excess of oxygen reacts with 451.4 g of lead, forming 374.7 g of lead(II) oxide. Calculate the percent yield of the reaction.

Stels [109]

Answer: The percent yield of the reaction is 77.0 %

Explanation:

$2Pb+O_2\rightarrow 2PbO$

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

$\text{Number of moles of lead}=\frac{451.4g}{207.2g/mol}=2.18moles$

$\text{Number of moles of lead oxide}=\frac{374.7g}{223.2g/mol}=1.68moles$

According to stoichiometry:

2 moles of $Pb$ produces = 2 moles of $PbO_2$

2.18 moles of $Pb$ is produced by= $\frac{2}{2}\times 2.18=2.18moles$ of $PbO_2$

Mass of $PbO_2$ = $moles\times {\text {Molar mass}}=2.18\times 223.2g/mol=486.6$

percent yield = $\frac{374.7g}{486.6g}\times 100=77.0\%$

3 0

3 years ago

Asap I will mark brainiest!What is the net force acting on the object in this free-body diagram? a.100 kg b.230 N c.170 N d.170

DiKsa [7]

Answer:

A..?

Explanation:

Im not entirely sure you should get a 2nd opinion M8.

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3 years ago

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The product of a Lewis acid-base reaction is a(n) __________, a single species that contains a new covalent bond. The Lewis acid

andreyandreev [35.5K]

Answer:

Adduct, donate, accept

Explanation:

Lewis acids are those having suitable vacant orbital for electron acceptance and forming a covalent bond with an electron rich species. Example: $BCl_{3}$ (B has vacant 2p orbital for electron acceptance)

Lewis bases are those having energetically available unshared electrons that can be donated to an electron deficient species and form a covalent bond. Example: $NH_{3}$ (N has energetically available lone pair)

So, product of Lewis acid-base reaction is an adduct ( $BCl_{3}-NH_{3}$ ) where a new covalent bond is formed between B and N.

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3 years ago