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3 years ago

A coffee cup has a heat capacity of 62.6 - If the coffee cup's temperature increases by 1.20°C, how much heat has it

Chemistry

1 answer:

zhannawk [14.2K]3 years ago

5 0

Answer:

75.12 J

Explanation:

Applying,

Q = CΔT................ equation 1

Where Q = amount of heat, C = Heat capacity, ΔT = temperature rise.

From the question,

Given: C = 62.6 J/K, ΔT = 1.20°C

Substitute these values into equation 1

Q = 62.6(1.20)

Q = 75.12 J

Hence the amount of heat it absorbed is 75.12 J

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The mixture which contains elements only is (a) air (b) brass (c) mineral water (d) seawater

Sholpan [36]

Answer:

So yes! A mixture can contain just elements if those elements are not chemically reactive to one another. Air is a great example of an elemental mixture as it contains nitrogen, oxygen, and argon (along with some other compounds).

Explanation:

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3 years ago

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Which property of matter depends on the amount of matter present?

andrew-mc [135]

C.) Volume
Intensive properties, for example; color and density, do not depend on present matter.

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4 years ago

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A certain alcohol contains only three elements, carbon, hydrogen, and oxygen. Combustion of a 20.00 gram sample of the alcohol p

bagirrra123 [75]

The empirical formula is C₂H₆O.

We must calculate the masses of C, H, and O from the masses given.

Mass of C =38.20 g CO₂ × (12.01 g C/44.01 g CO₂) = 10.424 g C

Mass of H = 23.48 g H₂O × (2.016 g H/18.02 g H₂O) = 2.6268 g H

Mass of O = Mass of compound - Mass of C - Mass of H

= (20.00 – 10.424 – 2.6268) g = 6.9487 g

Now, we must convert these masses to moles and find their ratios.

From here on, I like to summarize the calculations in a table.

Element Mass/g Moles Ratio Integers

C 10.424 0.8680 1.999 2

H 2.6268 2.606 6.001 6

O 6.9487 0.4343 1 1

The empirical formula is C₂H₆O.

7 0

3 years ago

The weather in Europe was unusually warm during the summer of 1995. The TV news reported temperatures as high as 45 degree centi

Tpy6a [65]

Answer : The temperature on the Fahrenheit scale was, $113^oF$

Explanation :

The conversion used for the temperature from degree centigrade to Fahrenheit is:

$^oF=(^oC\times \frac{9}{5})+32$

where,

$^oF$ = temperature in Fahrenheit

$^oC$ = temperature in centigrade

As we are given the temperature in degree centigrade is, 45

Now we have to determine the temperature in Fahrenheit.

$^oF=(45^oC\times \frac{9}{5})+32$

$^oF=113$

Therefore, the temperature on the Fahrenheit scale was, $113^oF$

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4 years ago

A liquid dietary supplement is packaged in 10-ml dropper containers to deliver 2000 international units of vitamin d3 in each dr

RoseWind [281]

Answer : 37 drops are delivered per milliliter of the solution.

Explanation :

The problem gives us lot of extra information.

We want to find the number of drops delivered in 1 milliliter here.

We have been given that, one drop of the solution delivers 0.027 mL of solution.

Let us use this as a conversion factor, $\frac{1 drop}{0.027 mL}$

Let us find number of drops in 1 mL using this conversion factor.

$1 mL \times \frac{1 drop}{0.027mL} = 37.0 drops$

Therefore we can say that 37 drops are delivered per milliliter of the solution.

7 0

4 years ago