Which statements are wrong about atoms

Chemistry

1 answer:

Mamont248 [21]2 years ago

6 0

Answer: Atoms are not able to exist independently

Explanation:

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Given 7.90 g of butanoic acid and excess ethanol, how many grams of ethyl butyrate would be synthesized, assuming a complete 100

Lana71 [14]

Answer : 9.293 g

Explanation : The reaction is

$C_{4}H_{8}O_{2} + C_{2}H_{5}OH ----\ \textgreater \ C_{6}H_{12}O_{2} + H_{2}O$

Here, if we assume the stoichiometric esterification ratio as 1:1 then,

no. of moles of $C_{4}H_{8}O_{2}$ = 7.05 g/ 88 = 8.011 $X 10^{-2}$ moles

so here, no. of moles of ethyl butyl rate = no. of moles of butyric acid ;

$\frac{m (C_{4}H_{8}O_{2})}{M (C_{4}H_{8}O_{2})} = \frac{m (C_{6}H_{12}O_{8})}{M (C_{6}H_{12}O_{8})}$

$m(C_{6}H_{12}O_{8}))$ = (7.05 /88.11) X 116.16 = 9.29 g

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3 years ago

The mole fraction of helium in a saturated solution at 0°C is 1.2 x 10–6. Find the pressure of helium above the solution. Henry'

Ierofanga [76]

Answer:

$P=5.67atm$

Explanation:

Hello there!

In this case, since the Henry's law is shown below:

$P=H/x$

Whereas x is the mole fraction, H the Henry's constant and P the pressure. In such a way, we plug in the aforementioned first two to obtain the corresponding pressure:

$P=\frac{6.8 x 10^{-6} atm^{-1}}{1.2 x 10^{-6}} \\\\P=5.67atm$

Regards!

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3 years ago

The commands given in nucleus are throughout the cell by the

qwelly [4]

Answer:

A.endoplamic reticulum

Explanation:

The endoplamic reticulum is an important organelle in protein synthesis. The nucleus contains DNA, which is the template for transcription of mRNA. mRNA acts as a message, which leaves the nucleus to become translated into proteins.

The endoplasmic reticulum is important in the synthesis, folding, and modification of proteins.

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3 years ago

I need help please help me

klio [65]

The answer would be true

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2 years ago

What is neutralization reaction?

Virty [35]

Explanation:

neutralization is a chemical reaction in which acid and a base react equal with each other.