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lana [24]
3 years ago
13

How much heat is needed to change 47grams of water into ice

Chemistry
1 answer:
Elenna [48]3 years ago
3 0

the answer you are looking for is 4.22 kj.

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Suppose the total volume of sand on the beach is 1,278m. What will the volume be after 24 hours of erosion?
agasfer [191]

Answer:

Let's assume that the erosion rate is "X/hour". The total volume of sand on a beach after 24 hours would be,

= total sand volume - (erosion rate per hour * 24)

= 1,278m - (X/hour * day)

Explanation:

Now assume that the erosion rate is 1 m per hour. Therefore, in 24 hours would be,

= 1,278m - (1/hour * 24)

= 1,278 - 24

= 1254 m.

5 0
3 years ago
Select the correct image.<br> Which body part is vestigial in humans?
Dominik [7]

Answer:

should be appendix, I can't see any image tho.

8 0
2 years ago
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Why can't we carry an umbrella during lighting?
sukhopar [10]
Because the medal rod is a conductor and will electricity goes straight through it and will hit you with lightning
6 0
3 years ago
Part A. Two containers, one at 305 K and the other at 295 K, are placed in contact with each other. 1. 1 J of heat flows from th
posledela

Answer:

0.00011 JK.

The process does NOT violate the second law of thermodynamics

Explanation:

The following parameters are given which are going to help in solving for the change in entropy of the system. The term "entropy'' simply means the degree of disorderliness of a system.

=> The temperature of container A = 305 K, the temperature of container B = 295 K and the amount of heat generated when the containers are placed in contact with each other = 1. 1 J.

The change in entropy of the hot container = -(1/305) = - 0.00328 J/K.

The change in entropy of the cold container = 1/295 = 0.00339 J/K.

Therefore, the change in the entropy of the system = - 0.00328 J/K + 0.00339 J/K = 0.00011 JK.

Note that the change in entropy of the system gives a positive value. Hence, this process does not violate the second law of thermodynamics.

The process does NOT violate the second law of thermodynamics.

7 0
3 years ago
What do the valence of electrons tell you?
9966 [12]

Answer:

valence electrons are the electrons that are located in the outermost electron shell of an element. Knowing how to find the number of valence electrons in a particular atom is an important skill for chemists because this information determines the kinds of chemical bonds that it can form and, therefore, the element's reactivity

Explanation:

4 0
3 years ago
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