Answer:(a) hydrogen and oxygen
Answer:
d. 75 protons, 110 neutrons
Explanation:
In an isotope, the number next to the number of the atom is the mass number (Protons + neutrons). Rhenium has as atomic number 75, that means Rhenium has <em>75 protons</em>. As atomic mass, 185, is the sum of protons and neutrons, number of neutrons is:
185 - 75 = <em>110 neutrons</em>
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Thus, right answer is:
<em>d. 75 protons, 110 neutrons
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Answer : The temperature of the chloroform will be,
Explanation :
First we have to calculate the mass of chloroform.
conversion used :
Now we have to calculate the temperature of the chloroform.
Formula used :
where,
q = amount of heat or energy = 1.46 kJ = 1460 J (1 kJ = 1000 J)
= specific heat capacity =
m = mass of substance = 110.958 g
= final temperature = ?
= initial temperature =
Now put all the given values in the above formula, we get:
Now we have to convert the temperature from Kelvin to Fahrenheit.
The conversion used for the temperature from Kelvin to Fahrenheit is:
As we know that, or,
...........(1)
Now put the value of temperature of Kelvin in (1), we get:
Therefore, the temperature of the chloroform will be,
1. True
2. True
3. False
4. True