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nekit [7.7K]
3 years ago
7

Choose the more reactive metal. K or Cu

Chemistry
2 answers:
vagabundo [1.1K]3 years ago
8 0

Answer: k

Explanation:

mixas84 [53]3 years ago
3 0
K is more reactive than Cu hope this helps!
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A calorimeter holds 50 g water at 22.0°C. A sample of hot iron is added to the water. The final temperature of the water and iro
makkiz [27]

The change in enthalpy associated with the change in the water’s temperature is 1254 J.

<h3>What is specific heat?</h3>

The amount of heat required to increase the temperature of one gram of a substance by one Celsius degree is known as specific heat.

Enthalpy change will be calculated as:

ΔH = -cmΔT, where

m = mass of water = 50g

c = specific heat of water = 4.18J/g°C

ΔT = change in temperature = 28 - 22 = 6 °C

On putting values in the above equation, we get

ΔH = -(4.18)(50)(6) = -1254 J

Hence change in enthalpy of the reaction is -1254 J.

To know more about enthalpy change, visit the below link:

brainly.com/question/11628413

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2 years ago
What is the main cause of increased erosion
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The main cause of increased erosion is natural elements like rain, wind and ice. Erosion is the process by which the surface of the Earth gets worn down. 
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6 0
3 years ago
To make the future development more eco-friendly and decrease water pollution from run-off, choose one of the following recommen
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construct using only recycled materials ^^

Explanation:

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3 years ago
I have a free response question due for an Ap Chemistry class. It states, an experiment is to be performed to determine the mass
34kurt

Answer:

Hi AP Chemistry student. It seems this experiment is impossible. Sterling Silver cannot be separated so easily with this pathetic equipment. However, if one were to carry this experiment out, I would assume they would need to put the alloy in the graduated cylinder and then somehow filter the silver out through filter paper or Buchner funnel. taking the mass with a stir rod is also helpful for the mass percent calculation. I hope this helps you out, good luck in Mrs. Fischer's class :)

Explanation:

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See below ↓↓↓

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