A house cat with a mass of 3.0 kg runs at a constant rate of 4.0 m/s in a straight line. What is the momentum of the cat?

Chemistry

2 answers:

masha68 [24]3 years ago

7 0

The answer is 12 kg x m /s.

tresset_1 [31]3 years ago

3 0

The answer is 12 kg x m/s

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Rank these systems in order of decreasing entropy. 1 = Greatest entropy and 7 = Least entropy. Group of answer choices 1 mol of

AlladinOne [14]

Answer:

1 mole of carbon disulfide gas at 273 K and 40 L
1 mol of chlorine gas at 273 K and 40 L
1 mol of neon gas at 273 K and 40 L
1 mol of neon gas at 273 K and 20 L
1/2 mol of neon gas at 273 K and 20 L
1/2 mol of neon gas at 100 K and 20 L
1/2 mol of liquid neon at 100 K

Explanation:

Entropy is the measure of disorder or randomness in a closed system. Its an extensive property of a thermodynamic system

The following points must be considered when ranking the systems according to their entropy:

The entropy of gases are highest than liquids or solid. And entropy of liquid is higher than solid. That is because gas has more microstate thus have the highest entropy.
Entropies of large complicated molecules are greater than those of smaller, simpler molecules. Because larger molecules have more disorder because of the greater number of ways they can be move around in three dimensional space.
highest temperature and highest volume will lead to greatest entropy
1 mole of any substance will have greater entropy than 1/2 mole of that same substance

6 0

3 years ago

Why can't all mixtures be classified as solutions?

shusha [124]

D. Not all mixtures are heterogeneous

7 0

3 years ago

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 $P = 39.8 \ mg$