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Simora [160]
3 years ago
6

Which has more mechanical energy, a box on the top shelf of a closet or a box of equal mass on the floor? The box on the floor h

as more mechanical energy because work has been done on it. The box on the shelf has more mechanical energy because it is higher above Earth's surface. They have the same mechanical energy. There is not enough information to know.
Chemistry
2 answers:
denis-greek [22]3 years ago
8 0

the box on the shelf is right:)

Ksju [112]3 years ago
4 0

Answer: B: The box on the shelf has more mechanical energy because it is higher above Earth's surface.

Explanation:

cause its right :)

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5TH GRADE SCIENCE!!!!!!
Yuri [45]

Answer:

Phase changes that require a loss in energy are condensation and freezing.

Explanation:

4 0
3 years ago
Read 2 more answers
10. Which term is same for one mole of O2 and one mole of ethane C2H6
melamori03 [73]

Answer:

b) Number of molecules

Explanation:

3 0
3 years ago
2. if 0.20 m fe3 had been used instead of 0.020 m fe3 , how would the numerical value of the rate constant and the activation en
dezoksy [38]

the calculated value is Ea is 18.2 KJ and A is 12.27.

According to the exponential part in the Arrhenius equation, a reaction's rate constant rises exponentially as the activation energy falls. The rate also grows exponentially because the rate of a reaction is precisely proportional to its rate constant.

At 500K, K=0.02s−1

At 700K, k=0.07s −1

The Arrhenius equation can be used to calculate Ea and A.

RT=k=Ae Ea

lnk=lnA+(RT−Ea)

At 500 K,

ln0.02=lnA+500R−Ea

500R Ea (1) At 700K lnA=ln (0.02) + 500R

lnA = ln (0.07) + 700REa (2)

Adding (1) to (2)

700REa100R1[5Ea-7Ea] = 0.02) +500REa=0.07) +700REa.

=ln [0.02/0 .07]

Ea= 2/35×100×8.314×1.2528

Ea =18227.6J

Ea =18.2KJ

Changing the value of E an in (1),

lnA=0.02) + 500×8.314/18227.6

= (−3.9120) +4.3848

lnA=0.4728

logA=1.0889

A=antilog (1.0889)

A=12.27

Consequently, Ea is 18.2 KJ and A is 12.27.

Learn more about Arrhenius equation here-

brainly.com/question/12907018

#SPJ4

5 0
1 year ago
How many bonding electrons are drawn in NH4+1?
Reil [10]

Answer:

What is the total number of valence electrons in the Lewis structure of nh4+?

Total valence electrons pairs

Total electron pairs are determined by dividing the number total valence electrons by two. For, NH4+, Total pairs of electrons are 4.

Explanation:

Hope it helps! Correct me if I am wrong :>

Im sure about my answer :>

Can you please mark me as brainlest?

7 0
3 years ago
If the mass of an object is 60.0 grams and the density of the object is 15.0 g/mL, what is the volume of the object? The formula
laila [671]

Answer:

168.56 mL

Explanation:

density = mass/volume, use basic algebra skills to replace the volume and solve

7 0
2 years ago
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