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umka21 [38]
3 years ago
6

11. The pH of an aqueous solution changes from 4 to 3 when the hydrogen ion concentration in the

Chemistry
1 answer:
Bogdan [553]3 years ago
4 0

decreases by a factor of 10. increases by a factor of 10.

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While heating up a 25 gram sample of concrete (specific heat = 0.210-cal/g°C), your initial tempărature is room temperature (25°
Lana71 [14]

Answer:

Final temperature  = 83.1 °C

Explanation:

Given data:

Mass of concrete = 25 g

Specific heat capacity = 0.210 cal/g. °C

Initial temperature = 25°C

Calories gain = 305 cal

Final temperature = ?

Solution:

Q = m. c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

305 cal = 25 g ×0.210 cal/g.°C × T2 -  25°C

305 cal = 5.25cal/°C × T2 -  25°C

305 cal / 5.25cal/°C = T2 -  25°C

58.1 °C = T2 -  25°C

T2 = 58.1 °C + 25°C

T2 = 83.1 °C

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2 years ago
Where and when are acute-phase proteins produced?
mrs_skeptik [129]

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The answer should be C. Primarily in the liver in response to inflammation :)

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2 years ago
Excited state occurs when the electrons are in the _ energy levels.
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