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Sindrei [870]
3 years ago
8

Can someone please help me

Chemistry
1 answer:
Vitek1552 [10]3 years ago
5 0
Of course i can help what do you need
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An astronaut is free-floating in space near a space station and it is not tethered to anything. He has some tools and a fire ext
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A.

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D. He could spray the fire extinguisher in the opposite direction of the space station


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Answer: Chemical change; Chemical property of heat of combustion

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What is an element considered a pure substance?
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Does the Ba(OH)2 solution contain ions?
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An unknown metal has a mass of 86.8 g. When 5040 J of heat are added to the sample, the sample temperature changes by 64.7 ∘ C .
grandymaker [24]

Answer: The specific heat of the unknown metal is 0.897J/g^0C

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed=5040 Joules

m= mass of substance = 86.8 g

c = specific heat capacity = ?

Initial temperature of the water = T_i

Final temperature of the water = T_f

Change in temperature ,\Delta T=T_f-T_i=(64.7)^0C

Putting in the values, we get:

5040=86.8\times c\times 64.7^0C

c=0.897J/g^0C

The specific heat of the unknown metal is 0.897J/g^0C

4 0
3 years ago
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