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Bezzdna [24]
3 years ago
10

Isra is analyzing the properties of several samples of elements to find out which sample is a metalloid. Which set of properties

most likely belongs only to a metalloid?
forms basic compounds and is a solid
has a high luster and is very brittle
is a gas and has low electrical conductivity
is brittle and forms acidic compounds
Chemistry
2 answers:
Semenov [28]3 years ago
7 0

Answer:

ITS B GUYS

Explanation:

GOT IT RIGHT ON EDG

ZanzabumX [31]3 years ago
4 0

Answer:

B.) has a high luster and is very brittle

Explanation:

just took the test

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The temperature of a 95.4 g piece of Cu increases from 25.0 °C to 48.0 °C when the Cu absorbs 849 J of heat. What is the specifc
melisa1 [442]
<h3>Answer:</h3>

0.387 J/g°C

<h3>Explanation:</h3>
  • To calculate the amount of heat absorbed or released by a substance we need to know its mass, change in temperature and its specific heat capacity.
  • Then to get quantity of heat absorbed or lost we multiply mass by specific heat capacity and change in temperature.
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in our question we are given;

Mass of copper, m as 95.4 g

Initial temperature = 25 °C

Final temperature = 48 °C

Thus, change in temperature, ΔT = 23°C

Quantity of heat absorbed, Q as 849 J

We are required to calculate the specific heat capacity of copper

Rearranging the formula we get

c = Q ÷ mΔT

Therefore,

Specific heat capacity, c = 849 J ÷ (95.4 g × 23°C)

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                                        = 0.387 J/g°C

Therefore, the specific heat capacity of copper is 0.387 J/g°C

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