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MatroZZZ [7]
3 years ago
5

Which metal will cool faster in water steel copper brass aluminum

Chemistry
2 answers:
Mandarinka [93]3 years ago
8 0

Answer:

Aluminum

Explanation:

RideAnS [48]3 years ago
4 0

Answer:

Copper!

Explanation:

Hope This Helps

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134 grams of nitric acid is added to 512 grams of water. Calculate the molality of nitric acid.
Nana76 [90]

Answer:   4.15234 m

512 g H2O * \frac{1 kg}{1000 g} = 0.512 kg H2O

Nitric Acid:  HNO3 = 1.008 + 14.007 + 3(15.999) = 63.012 g/mol

H = 1.008 g/mol

N = 14.007 g/mol

O3 = 3*15.999

134 g HNO₃ * \frac{mol}{63.012 g} = 2.126 mol

m = \frac{2.126  mol}{0.512  kg} = 4.15234 m

6 0
3 years ago
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A metal melts at 450 degrees celsius. Is this property of the metal classified as chemical or physical?
Romashka-Z-Leto [24]
It's a physical property because it doesn't change the element of the metal.
does this make sense?
8 0
3 years ago
What is the name of the state when electrons absorb energy and move to a higher energy level?
Sergeu [11.5K]

Answer:

Excited State

Explanation:

It's when electrons absorb energy and move to a higher level.

4 0
3 years ago
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The heat of fusion for water is the amount of energy needed for water to
alexandr402 [8]
  The heat of fusion for water is the amount of energy needed for water to :
c.melt
3 0
3 years ago
A unit of heat energy that was formerly used frequently was the calorie. Look up the definition of the calorie in your textbook
dybincka [34]

Answer and Explanation:

Calorie is the unit of heat energy . There are 2 units with the same name 'calorie' which is widely used.

'The amount of heat energy required to increase the temperature of 1 gram of water by mass by 1^{\circ}C or 1 K is known as small calorie or gram calorie'.

Another one is large calorie which can be defined as :

'The amount of heat energy required to make arise in temperature of water 1 kg by mass by 1^{\circ}C or 1 K is known as large calorie or  kilcalorie and is represented as Cal or kcal'.

After the adoption of SI system, thee units of the metric system cal, C or kilocal are considered deprecated or obsolete with the SI unit for heat energy as 'joule or J'

1 cal = 4.184 J

1C or 1 kilocal = 4184 J

Calorimeter constant:

Calorimeter constant, represented as 'C_{cal}' is used to quantify the heat capacity or the amount of heat of a calorimeter.

It can be calculated by ther given formula:

{\displaystyle C_{cal}}={\frac {\Delta {H}}{\Delta {T}}}}}

where,

{\Delta {T}} = corresponding temperature change

{\Delta {H} = enthalpy change

Its unit is J/K or J/1^{\circ}C[/tex] which can be convertyed to cal/1^{\circ}C[/tex] by dividing the calorimeter constant by 4.184 or 4184 accordingly.

8 0
3 years ago
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