Answer:
The answer to your question is the letter C.
Explanation:
Data
2NaCl
When we write molecules we use numbers in two main different ways.
If the coefficients are at the beginning of the molecule, this number indicates the number of molecules presented.
If there are subscripts, this number indicates the quantity of that specific element.
So the correct answer is letter C because it describe the correct function of this coefficient.
Answer:
smallest, smallest
Explanation:
Waves with the longest wavelengths have the _smallest__________ frequency and the __smallest_________ energy.
Answer:
719.83°C
Explanation:
The heat that the sample of Zinc gives is equal to the heat that water is absorbing. That is:
C(Zn) * m(Zn) * ΔT(Zn) = C(H2O) * m(H2O) * ΔT(H2O)
<em>Where:</em>
<em>C is specific heat (Zn: 0.390J/g°C; H2O: 4.184J/g°C)</em>
<em>m is mass (Zn: 2.50g; H2O: 65.0g)</em>
<em>ΔT (Zn: ?; H2O: (22.5°C - 20.0°C = 2.50°C)</em>
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Replacing:
0.390J/g°C * 2.50g * ΔT(Zn) = 4.184J/g°C * 65.0g * 2.50
ΔT(Zn) = 697.33°C
As final temperature of Zn is 22.50°C, initial temperature is:
Initial temperature: 697.33°C + 22.50°C
719.83°C
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