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4 years ago

What do methanoic acid (HCOOH), 1-chloroethane (CH2ClCH3), and propanone (CH3COCH3) have in common?

1 answer:

6 0

Functional groups are the set of atoms in a compound that's responsible for the chemical properties of the compound.
the functional groups for the given compounds are as follows
methanoic acid = carboxylic group
chloroethane = haloalkane
propanone = ketone
option A is incorrect as only one of the given compounds is a carboxylic acid, others have other functional groups
option C is incorrect as they have three different functional groups as stated above
option B is incorrect as its not a homologous series. Homologous series are a set of compounds with same functional group that differs by a CH₂ group. since the functional groups are different it does not belong to a homologous series as well .

correct option is D. none of these
as none of the other options are correct

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10, 3 is acidic and 12 isnt

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3 years ago

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3 years ago

1. Salt was added to water and stirred until it completely dissolved. Which

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3 years ago

Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl ( aq ) HCl(aq) , as

Daniel [21]

Answer:

1.368 grams of manganese dioxide must b added to HCl to obtain 385 mL of chlorine gas.

Explanation:

Using ideal gas equation:

PV = nRT

where,

P = Pressure of chlorine gas = $765 Torr=\frac{765}{760}atm$

1 atm = 760 Torr

V = Volume of chlorine gas = 385 mL = 0.385 L ( 1 mL - 0.001 L)

n = number of moles of chlorine gas = ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of chlorine gas =25 °C= 25 + 273 K = 300 K

Putting values in above equation, we get:

$(\frac{765 }{760}atm)\times 0.385 L=n\times (0.0821L.atm/mol.K)\times 300K\\\\n=0.01573 mole$

$MnO_2(s)+4HCl(aq)\rightarrow MnCl_2(aq)+2H_2O(l)+Cl_2(g)$

According to reaction, 1 mole of chlorine gas is obtained from 1 mole of manganese dioxide ,then 0.01573 moles of chlorine gas will be obtained from :

$\frac{1}{1}\times 0.01573 mol=0.01573 mol$ of manganese dioxide

Mass of 0.01573 moles of manganese dioxide:

0.01573 mol × 86.94 g/mol = 1.368 g

1.368 grams of manganese dioxide must b added to HCl to obtain 385 mL of chlorine gas.

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4 years ago

The pressure of a gas is 100.0 kPa and its volume is 500.0 mL. If the volume increases to 1,000.0 mL, what is the new pressure o

elena-14-01-66 [18.8K]

Answer:

$P_2=50kPa$

Explanation:

Hello,

In this case, we can apply the Boyle's law in order to understand the pressure-volume relationship as an inversely proportional relationship relating the initial and the final volume:

$P_1V_1=P_2V_2$

Next, we compute the final pressure P2:

$P_2=\frac{P_1V_1}{V_2}=\frac{100.00kPa*500.0mL}{1000.0mL} \\\\P_2=50kPa$

Thus we validate, the higher the volume the lower the pressure.

Best regards.

3 0

3 years ago