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inna [77]
3 years ago
6

dmitri mendeleev's periodic law states that chemical and physical properties repeat themselves in groups of ?

Chemistry
2 answers:
Ket [755]3 years ago
8 0
Dmitri mendeleev's periodic law states that chemical and physical properties repeat themselves in groups of 8. 
zubka84 [21]3 years ago
3 0
Dmitri Mendeleev's periodic law states that chemical and physical properties repeat themselves in groups of 8.
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5)
Drupady [299]

What amount of heat absorbs 50 g of steel (ce = 0.115 cal / g. ° C) that

does its temperature vary by 25 ° C?

Answer:

143.75cal

Explanation:

Given parameters:

Mass of steel  = 50g

Specific heat capacity of the steel  = 0.115cal/g°C

Temperature  = 25°C

Unknown:

Amount of heat = ?

Solution:

The amount of heat to cause this temperature change is dependent on mass and specific heat capacity of the substance.

  Amount of heat  = m C (ΔT)

m is the mass

c is the specific heat capacity

ΔT is the temperature change

 Now insert the parameters and solve;

  Amount of heat  = 50 x 0.115 x 25

  Amount of heat  = 143.75cal

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