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3 years ago

Thermal energy can be transformed to do work . true false

Chemistry

2 answers:

dybincka [34]3 years ago

6 0

Answer:

False

Thermal energy is unique because it cannot be converted to other forms of energy. Only a difference in the density of thermal/heat energy (temperature) can be used

Explanation:

Have a great day!

anyanavicka [17]3 years ago

4 0

Answer:

FALSE!!! Thermal energy can be transformed to heat.

Explanation:

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What does I stand for?

tatuchka [14]

I: Current
V: Voltage
R: resistance
you’re welcome ;)

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3 years ago

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How many grams of lead(II) sulfate (303 g/mol) are needed to react with sodium chromate (162 g/mol) in order to produce 0.162 kg

Afina-wow [57]

Answer : The mass of $PbSO_4$ needed are, 1.515 grams.

Explanation :

First we have to calculate the mole of $PbCrO_4$ .

$\text{Moles of }PbCrO_4=\frac{\text{Mass of }PbCrO_4}{\text{Molar mass of }PbCrO_4}=\frac{0.162g}{323g/mole}=0.005mole$

Now we have to calculate the moles of $PbSO_4$ .

The balanced chemical reaction will be,

$PbSO_4+Na_2CrO_4\rightarrow PbCrO_4+Na_2SO_4[tex]From the balanced chemical reaction, we conclude thatAs, 1 mole of [tex]PbCrO_4$ produced from 1 mole of $PbSO_4$

So, 0.005 mole of $PbCrO_4$ produced from 0.005 mole of $PbSO_4$

Now we have to calculate the mass of $PbSO_4$

$\text{Mass of }PbSO_4=\text{Moles of }PbSO_4\times \text{Molar mass of }PbSO_4$

$\text{Mass of }PbSO_4=0.005mole\times 303g/mole=1.515g$

Therefore, the mass of $PbSO_4$ needed are, 1.515 grams.

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3 years ago

What compound is formed when methyloxirane (1,2-epoxypropane) is reacted with ethylmagnesium bromide followed by treatment with

Pavlova-9 [17]

Answer:

Pentan-2-ol

Explanation:

On this reaction, we have a Grignard reagent (ethylmagnesium bromide), therefore we will have the production of a carbanion (step 1). Then this carbanion can attack the least substituted carbon in the epoxide in this case carbon 1 (step 2). In this step, the epoxide is open and a negative charge is generated in the oxygen. The next step, is the treatment with aqueous acid, when we add acid the hydronium ion ( $H^+$ ) would be produced, so in the reaction mechanism, we can put the hydronium ion. This ion would be attacked by the negative charge produced in the second step to produce the final molecule: "Pentan-2-ol".

See figure 1

I hope it helps!

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3 years ago

What is the correct way to smell a chemical

exis [7]

Answer:

If you need to smell the odor of a chemical, waft or fan the fumes toward your nose with one hand. Do not put your nose over the container and inhale the fumes.

Do not touch, eat, or smell any chemical unless instructed to do so. ... Hold chemical containers away from your body. Carefully check the label on the bottle before using its content.

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3 years ago

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Help me get this done today please no wrong answer

myrzilka [38]

Answer:

Explanation:

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3 years ago