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Ratling [72]
4 years ago
5

An object has a kinetic energy of 25j and mass of 34kg how fast is the object moving

Chemistry
1 answer:
disa [49]4 years ago
6 0
KE= \frac{1}{2} mv^2

KE- kinetic energy
m - mass
v- velocity
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If a tire can hold 19 L of air at 175 kPa and 25° Celsius, what volume of air can the tire hold at 215 kPa and 30° Celsius?
Usimov [2.4K]
Using p1v1/t1=p2v2/t2
p1=175kpa
p2=215kpa
v1=19l
v2=?
t1=25+273=298
t2=30+273=303
175x19/298=215xv2/303
8.808x303=215v2
2669/215=v2
v2=12.4l
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3 years ago
How does the activity series of metals tell which reactions will occur?
Helga [31]

C. Metals higher in the series will replace metal ions in solution that

are lower in the series.

Explanation:

The activity series of metals shows the extent of reactivity of different metals.

On the activity series, the most reactive metals are located higher up on the able whereas the less reactive ones are found at the bottom of the series.

  • We can tell if single displacement reactions will occur by simply looking at the reactivity series.
  • Metals that are more reactive will displace the ones that are not very reactive that are positioned down the series. Such a reaction will occur.
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Learn more:

Precipitation reaction brainly.com/question/7035326

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6 0
3 years ago
What's another way to increase the solubility of a solid solute without increasing the temperature?
steposvetlana [31]

Key Points

For many solids dissolved in liquid water, the solubility increases with temperature.

The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

4 0
3 years ago
How are the sizes of stars measured?<br><br><br> I just need a simple answer
S_A_V [24]
They are determined by the length of time it takes for light to travel from the Earth to the desired star
7 0
3 years ago
02 (s) + Pb(s) — PbO2(s) find the reduced and oxidized reactants
Arlecino [84]

Answer:

Oxygen is oxidizing gent and itself get reduced while lead is reducing agent and itself get oxidize.

Explanation:

Chemical  equation with oxidation state:

O⁰₂(s)  +  Pb⁰ (s)    →  Pb⁺⁴O₂⁻²(s)

Oxidizing agent:

Oxidizing agents, oxidize the other substance and itself get reduced. They can be identify by just looking the oxidation state. If oxidation state is decreased on the right side it means substance gain the electron and get reduced.

Reducing agent:

Reducing agents, reduce the other substance and itself get oxidize. They can be identify by just looking the oxidation state. If oxidation state is increased on the right side it means substance lose the electron and oxidation state increased.

In given chemical equation, oxygen and lead were in neutral form they react and form lead dioxide. In this product oxygen is oxidizing gent and itself get reduced and oxidation state change from 0 to -2 while lead is reducing agent, itself get oxidize and oxidation state change from o to +4.

7 0
3 years ago
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