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3 years ago

Characteristics of metals?

Chemistry

1 answer:

denis23 [38]3 years ago

7 0

Malleable, conducts electricity, shiny, hard
hope this helps!

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What 2 type of energy is wood to burning wood science question

Sloan [31]

Answer:

potential energy and kinetic energy

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3 years ago

An unknown piece of metal weighing 95.0 g is heated to 98.0°C. It is dropped into 250.0 g of water at 23.0°C. When equilibrium i

lutik1710 [3]

Answer:

$C_{metal}=126.6\frac{J}{g\°C}$

Explanation:

Hello!

In this case, when two substances at different temperature are put in contact and an equilibrium temperature is attained, we can evidence that the heat lost by the hot substance (metal) is gained by the cold substance (water) and we can write:

$Q_{metal}=-Q_{water}$

Which can be also written as:

$m_{metal}C_{metal}(T_{EQ}-T_{metal})=-m_{water}C_{water}(T_{EQ}-T_{water})$

Thus, since we need the specific heat of the metal, we solve for it as shown below:

$C_{metal}=\frac{m_{water}C_{water}(T_{EQ}-T_{water})}{-m_{metal}(T_{EQ}-T_{metal})} \\\\C_{metal}=\frac{250.0g*4.184\frac{J}{g\°C}(29.0\°C-98.0\°C)}{95.0g(29.0\°C-23.0\°C)} \\\\C_{metal}=126.6\frac{J}{g\°C}$

Best regards.

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2 years ago

How many moles of H20 are needed to produce 1 mole of O2 in the following equation?

Alex787 [66]

2 moles is the answer

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3 years ago

How many grams are in 5.2 grams of K

AleksAgata [21]

I think you meant K as in kilograms?
If so, the answer should be 0.0052.

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2 years ago

Read 2 more answers

Advantages and disadvantages of using tidal energy instead of non-renewable energy sources.

Phantasy [73]

Advantages of using tidal energy:

-Environment-friendly

-A highly predictable energy source

-High energy density

-Operational and maintenance costs are low

-An inexhaustible source of energy

Disadvantages of using tidal energy:

-High tidal power plant construction costs.

-Negative influence on marine life forms.

-Location limits.

-The variable intensity of sea waves.

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3 years ago