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stira [4]
4 years ago
15

Plz help me guys A B C D

Chemistry
1 answer:
Taya2010 [7]4 years ago
3 0

Answer:

C

Explanation:

I think

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What does molecule mean?
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A pure substance, only one type of atom

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Tumu’s class was given an assignment to feature a scientist that contributed to the development of the cell theory. The class de
xxMikexx [17]

Answer:

The types of cells at work in the human body

Explanation:

Rudolf Virchow was a German physician who is known as the father of modern pathology. He contributed to the development of the cell theory by concluding that all cells come from preexisting cells. This led to the conclusion that diseases occur at the cellular level, which allowed scientists to diagnose diseases more accurately.

Considering that Virchow analyzed human cells, the image that Tumu would be most likely to use in his assignment is the one of the types of cells at work in the human body.

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3 years ago
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A Potassium isotope contains 19 protons, 19 electrons and 21 neutrons. What is its mass number? 40​
OlgaM077 [116]

Answer:

17

Explanation:

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7 0
3 years ago
9
yaroslaw [1]

Answer:

T2 = 36.38°C

Explanation:

Given data:

Mass of water = 75 g

Initial temperature = 30 °C

Final temperature = ?

Heat absorbed = 2000 J

Solution:

Specific heat capacity of water is 4.18 J/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = Final temperature - initial temperature

2000 J = 75 g×4.18 J/g.°C × T2- T1

2000 J = 313.5 J/°C × T2- T1

2000 J = 313.5 J/°C × T2 - 30 °C

2000 J / 313.5 J/°C  = T2 - 30 °C

6.38 °C = T2 - 30 °C

T2 = 6.38 °C +  30°C

T2 = 36.38°C

7 0
3 years ago
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