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antiseptic1488 [7]
3 years ago
8

Imagine a 10 kg block moving with a velocity of 20/ms to the left calculate the kinetic energy of this block

Chemistry
1 answer:
tino4ka555 [31]3 years ago
4 0

Answer:

KE = 1/2 mv^2=0.5x 10 X 20^2=  800

Explanation

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what pressure will be needed to reduce the volume of 77.4 l of helium at 98.0 kpa to a volume of 60.0 l? 76 kpa 126 kpa
nekit [7.7K]
The system follow the Boyle's Law:

P_1\cdot V_1 = P_2\cdot V_2\ \to\ P_2 = \frac{P_1\cdot V_1}{V_2} = \frac{98\ kPa\cdot 77.4\ L}{60.0\ L} = \bf 126.4\ kPa
6 0
3 years ago
Which environmental concern does not apply to wind power?
wolverine [178]
<h2>Answer:</h2>

The correct answer is option C which is chemical waste.

<h3>Explanation:</h3>
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3 0
3 years ago
Explain what occurs during an endothermic reaction?
NARA [144]
<span>
An Endothermic Reaction occurs when the energy used to break the bonds in the reactants is greater than the energy given out when bonds are formed in the products

An Exothermic reaction is one that releases energy in the form of heat or light.

</span>Exothermic Reactions: Rust and Setting of Cement 
Endothermic Reactions: Photosynthesis and evaporation.

One example of an endothermic reaction is Ice packs. The packs that deliver instant cooling when a seal inside is broken. It works by having water and ammonium nitrate in separate compartments and then when you break the seal between them they mix. The reaction is endothermic so it takes in heat from the surroundings so the pack become cold.

I hoped this helped you!


3 0
3 years ago
21 pts. Sodium reacts with oxygen to produce sodium oxide as described by the balanced equation below. If 54.1g of sodium reacts
Aleksandr [31]
First, calculate the amount fo Na2O that should be produced with the given amount of sodium using proper dimensional analysis and  the balanced chemical reaction,

   theoretical amount of Na2O = (54.1 g of Na)(1 mol Na/23 g Na)(2 mos Na2O/4 mols Na)(62 g Na2O/ 1mol Na2O)
       
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Calculation of percent yield,

                % yield = (61.8 g Na2O) / (72.9 g of Na2O) x 100%
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Answer: 84.75%
8 0
3 years ago
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Alchen [17]

Answer:

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bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

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