All categories

3 years ago

Which statement implies that some ethanol supporters have changed their minds about the fuel?

Chemistry

1 answer:

forsale [732]3 years ago

4 0

Answer:

D. “Many people are disappointed in ethanol because they believed that it would help reduce the price at the pump, not increase it.”

Explanation:

You might be interested in

The source of alpha particles in a smoke detector is the

pantera1 [17]

The source of alpha particles in a smoke detector is the Americium.

5 0

2 years ago

What r some important things in this paragraph ????

Semenov [28]

Keeping your arm straight in front of you, you rotate 90° to your left, and see the left side of the circle lit while the right side is dark. Half the ball is still lit up, but you can see only part of the lit area. As you continue to rotate, you see a different amount of the ball.

6 0

2 years ago

Read 2 more answers

The experiment above is repeated, but instead of extracting once with 6 mL the extraction is done three times with 2 mL of dichl

nevsk [136]

Complete Question

A student is extracting caffeine from water with dichloromethane. The K value is 4.6. If the student starts with a total of 40 mg of caffeine in 2 mL of water and extracts once with 6 mL of dichloromethane

The experiment above is repeated, but instead of extracting once with 6 mL the extraction is done three times with 2 mL of dichloromethane each time. How much caffeine will be in each dichloromethane extract?

Answer:

The mass of caffeine extracted is $P = 39.8 \ mg$

Explanation:

From the question above we are told that

The K value is $K = 4.6$

The mass of the caffeine is $m = 40 mg$

The volume of water is $V = 2 mL$

The volume of caffeine is $v_c = 2 mL$

The number of times the extraction was done is n = 3

Generally the mass of caffeine that will be extracted is

$P = m * [\frac{V}{K * v_c + V} ]^3$

substituting values

$P = 40 * [\frac{2}{4.6 * 2 + 2} ]^3$

$P = 39.8 \ mg$

6 0

3 years ago

What term best defines the process that occurs when nuclei combine to produce a nucleus with more mass?

bekas [8.4K]

I just answered your other question and wrote all the definitions of the terms. I would say this is probably refering to Fusion because you are fusing together more nuclei into one nucleus. Fusion= bringing separate things into one entity.

4 0

3 years ago

Read 2 more answers

How do you convert grams of zinc to moles of zinc

leva [86]

Take mass of zinc divided by the relative molecular mass - 30 for zinc ( from periodic table)

4 0

3 years ago