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2 years ago

Help….? Anyone? It’s a test. 99 points

Chemistry

2 answers:

Crazy boy [7]2 years ago

7 0

Answer:

Cyanobacterium

Explanation:

“Cyanobacterium” is the correct answer, as it has the kingdom bacteria in its name.

Naily [24]2 years ago

6 0

which organism is a member of Kingdom Eubacteria?

CYANOBACTERIUM

➜ are classified in the kingdom Monera. considered to be more closely related to bacteria and are no longer considered members of the plant family.

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Element in the periodic table are arranged by

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elements in the periodic table are arranged by the atomic number of the element

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Write a description that explains how the digestive, circulatory, and excretory systems WORK TOGETHER in order to deliver very i

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Answer:

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I have a 270 g cup of coffee at 94.1 degrees Celsius. Assume that the specific heat of coffee is the same as pure water, 4.18 J/

natulia [17]

Answer:

90.64 degrees

Explanation:

Lets list out the parameters given in the question.

Mass of Cup = 270g

Temp. of cup = 94.1C

Specific heat capacity of C = 4.18J/gC

Temp. of Silver spoon = 26.8C

heat capacity of the silver spoon = 61.2 J/C

The fact that thermal equilibrium was mentioned simply means that;

Heat Lost by coffee= Heat gained by spoon

The relationship between the parameters mentioned is given as;

Q = m* c * dT

Where;

m is the mass, c is the specific heat capacity and dT is the "change" in temperature.

Assume the final temperature of the whole system is "x". They would both have the same final temperature since they are in thermal equilibrium.

Heat lost by coffee = 270 * 4.18 * (94.1 - x)

(94.1 -x) because coffee will loose heat, hence temperature of coffee will fall.

Heat gained by spoon = c *dT = 61.2 * (x - 26.8).

dT = Final Temp. - Initial Temp.

dT = x - 26.8

Heat lost = Heat gained :

270 * 4.18 * (94.1 - x) = 61.2 * (x - 26.8),

1128.6 (94.1 - x) = 61.2 (x- 26.8)

18.44 ( 94.1 - x) = x - 26.8

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1762 = 19.44 x

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3 years ago

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