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scZoUnD [109]
2 years ago
7

By how much will the speed of a body of fixed mass, increase if its kinetic energy becomes four times its initial kinetic energy

?
Chemistry
2 answers:
cricket20 [7]2 years ago
7 0

Answer:

Therefore, when the kinetic energy increases by four times, then the moment will increase by two times.

yanalaym [24]2 years ago
5 0

Answer:

speed will also increase in 4 time

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Freezing a candy bar is an example of a physical change. <br> True or false
Debora [2.8K]

Answer: This is true.

Explanation:  

 It is true because if becomes frozen, then it is physically harder to melt...

6 0
1 year ago
Zinc has a specific heat capacity of 0.390 J/goC. What is its molar heat capacity? Enter your answer numerically to three signif
ch4aika [34]

Answer:

The answer to your questions is  Cm = 25.5 J/mol°C  

Explanation:

Data

Heat capacity = 0.390 J/g°C

Molar heat capacity = ?

Process

1.- Look for the atomic number of Zinc

     Z = 65.4 g/mol

2.- Convert heat capacity to molar heat capacity

       (0.390 J/g°C)(65.4 g/mol)

- Simplify and result

   Cm = 25.5 J/mol°C  

3 0
2 years ago
What’s the mass of 2.80 mol of ca
Ludmilka [50]

Answer:

112.22 g

Explanation:

mass = no. of moles x atomic mass

From the periodic table, we can see the atomic mass of Ca is 40.078.

Therefore,

mass = 2.80 x 40.078

= 112.22g (corrected to 2 decimal places.)

3 0
2 years ago
How many moles are in 4.85 x 10^25 atoms of carbon?
Serjik [45]

Answer:

4.85 x 10^25

Explanation:

thats what i was told by a calculator

6 0
2 years ago
Write a balanced half-reaction for the reduction of permanganate ion mno−4 to solid manganese dioxide mno2 in acidic aqueous sol
Svetlanka [38]

The half-reaction includes either the reduction or the oxidation reaction of the redox reactions. In acidic solution permanganate ion will react with hydrogen ion to yield manganese ion and water.

<h3>What are Redox reactions?</h3>

Redox or oxidation-reduction reactions are the chemical reactions in which the oxidation and the reduction of the chemical species occur simultaneously.

Permanganate (VII) ion is a strong oxidizing agent and gets easily reduced to manganese ion in presence of the hydrogen ion in an acidic solution.

The balanced half-reaction for reduction is shown as,

\rm MnO_{4}^{-} \; (aq)+ 8H^{+} \; (aq)+ 5e^{-} \rightarrow Mn^{2+} \; (aq)+ 4H_{2}O \; (l)

Learn more about reduction reactions here:

brainly.com/question/10084275

#SPJ4

8 0
1 year ago
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