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3 years ago

Which of the following will result in a chemical change?

Chemistry

2 answers:

Alinara [238K]3 years ago

5 0

C burning coal in a furnace

Galina-37 [17]3 years ago

3 0

The answer is C. I just finished the test.

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What are the Physical changes for oxygen?

wolverine [178]

Answer:

Oxygen is a colorless, odorless, tasteless gas. It changes from a gas to a liquid at a temperature of -182.96°C (-297.33°F). The liquid formed has a slightly bluish color to it. Liquid oxygen can then be solidified or frozen at a temperature of -218.4°C (-361.2°F).

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2 years ago

how do the parts of the liverworts above the soil get the minerals from the soil that are needed for plant processes

Serggg [28]

Answer:

I don't know but I'm curious now

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2 years ago

(c) O2 gas is transferred from a 3 L vessel containing oxygen at 4 atm to an evacuated 20 L vessel at a constant temperature of

Fudgin [204]

Answer:

After the transfer the pressure inside the 20 L vessel is 0.6 atm.

Explanation:

Considering O2 as an ideal gas, it is at an initial state (1) with V1 = 3L and P1 = 4 atm. And a final state (2) with V2 = 20L. The temperature remain constant at all the process, thus here applies the Boyle-Mariotte law. This law establishes that at a constant temperature an ideal gas the relationship between pressure and volume remain constant at all time:

$P x V = k$

Therefore, for this problem the step by step explanation is:

$P_{1} xV_{1} = P_{2} xV_{2}$

Clearing P2 and replacing

$P_{2}= \frac{P_{1} xV_{1}}{V_{2} } = \frac{4atmx3L}{20L} = 0.6atm$

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3 years ago

Heat is being transferred from the ground to the air above it by conduction. Explain how this is possible.

Klio2033 [76]

Answer:

Conduction directly affects air temperature only a few centimeters into the atmosphere. During the day, sunlight heats the ground, which in turn heats the air directly above it via conduction. At night, the ground cools and the heat flows from the warmer air directly above to the cooler ground via conduction.

Explanation:

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3 years ago

Read 2 more answers

Draw the curved arrow mechanism for the reaction between (2S,3S)-3,5-dimethylhexan-2-ol and PCl3. Note the specific instructions

Vikki [24]

Answer:

(2R,3S)-2-chloro-3,5-dimethylhexane

Explanation:

As first step we have the attack of the OH group to the P atom in the PCl3 and one of the Cl atoms would leave. Then we will have a rearrangement to produce a double bond with the oyxgen on the OH. Finally the Cl produced will attack the carbon in a Sn2 substitution reaction to produce the halide with an opposite configuration.

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3 years ago