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3 years ago

Compute 4.659×104−2.14×104. Round the answer appropriately.

Chemistry

1 answer:

erma4kov [3.2K]3 years ago

6 0

261.976 which rounds to 261.98(if rounding to the hundredths.

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Select the compounds that cannot undergo friedel crafts alkylation. check all that apply. check all that apply. aniline phenol k

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Freidal craft reaction is the attack of a carbon or carbon chain on aromatic ring with the help of anhydrous AlCl3 to produce alkylated benzene ring.

Only ketone not be able to undergo friedal craft reaction as, it is not aromatic compound whereas all the given reactants are aromatic and gives friedal craft reaction.

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3 years ago

Which statement defines the enthalpy of hydration?

Anettt [7]

The law of conservation of energy

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3 years ago

A gas with a volume of 4.0L at a pressure of 205kPa is allowed to expand to a volume of 12.0L. What is the pressure in the conta

mr Goodwill [35]

Answer:

68.3 kilo Pascal is the pressure in the container.

Explanation:

To calculate the new pressure , we use the equation given by Boyle's law. This law states that pressure is inversely proportional to the volume of the gas at constant temperature.

The equation given by this law is:

$P_1V_1=P_2V_2$

where,

$P_1\text{ and }V_1$ are initial pressure and volume.

$P_2\text{ and }V_2$ are final pressure and volume.

We are given:

$P_1=205kPa\\V_1=4.0 L\\P_2=?\\V_2=12.0 L$

Putting values in above equation, we get:

$P_2=\frac{P_1V_1}{V_2}$

$=\frac{205 kPa\times 4.0 L}{12.0 L}=68.3 kPa$

68.3 kilo Pascal is the pressure in the container.

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3 years ago

One mole of Ca is equal to how many atoms

Irina18 [472]

Answer:

1 mole of calcium contains 6.023 $\times$ $10^{23}$ atoms.

Explanation:

1 mole is the amount of a substance that contains exactly $6.023\times 10^{23}$ constituent particles. 1 mole of a substance is always equal to the atomic mass of the element.

Hence, 1 mole of calcium will also have $6.023\times 10^{23}$ atoms.

Number of atoms in 1 mole calcium = 6.023 $\times$ $10^{23}$ atom

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4 years ago

Which of the following states of matter occurs at the highest temperature?

Aleks [24]

The answer is C. Plasma.

7 0

3 years ago

Read 2 more answers