The kilogram is the standard unit of

Chemistry

1 answer:

Sati [7]3 years ago

7 0

Answer:

The kilogram is the standard unit of mass.

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In which step of a four-stroke engine cycle does the car release CO2, H2O, and CO?

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Answer:

$\boxed{\text{exhaust stroke}}$

Explanation:

The four strokes are

Intake: The mixture of air and fuel enters the cylinder.
Compression: The mixture is compressed by a factor of about 11.
Ignition: A spark ignites the fuel, which burns and produces CO₂, CO, and H₂O.
Exhaust: The combustion products are expelled from the cylinder.

$\text{The cylinder releases CO$_{2}$, CO, and H$_{2}$O during the }\boxed{\textbf{exhaust stroke}}$

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5. After a day of testing race cars, you decide to

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How can an invasive species like weeds affect crops on a farm?

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Explanation:

All of the above

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3 years ago

The period of of 440 Hz soundwave is how many seconds

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The period of any wave is one second. the measure of the wave, in this case 440 Hz, is how many wavelengths per second.

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During electrophilic aromatic substitution, a resonance-stabilized cation intermediate is formed. Groups, already present on the

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Answer:

See explanation and image attached

Explanation:

Aromatic compounds undergo electrophilic aromatic substitution reactions in which the aromatic ring is maintained.

Substituted benzenes may be more or less reactive towards electrophilic aromatic substitution than benzene depending on the nature of the substituent present in the ring.

Substituents that activate the ring towards electrophilic substitution such as -OCH3 are ortho-para directing.

The major products of the bromination of anisole are p-bromoanisole and o-bromoanisole. The resonance structures leading to these products are shown in the image attached.

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