8.509 kilocalories I think
Answer: The percentage composition of nitrogen , hydrogen and oxygen is 22.2 % , 1.59 % and 76.2% respectively.
Explanation:
Percentage composition is defined as the ratio of mass of substance to the total mass in terms of percentage.
Percentage composition=
a) 
b) 
c) 
The percentage composition of nitrogen , hydrogen and oxygen is 22.2 % , 1.59 % and 76.2% respectively.
Molarity is defined as the number of moles of solute in 1 L of solution
mass fo KCl in the solution is - 5.0 g
number of moles of KCl - 5.0 g/ 74.5 g/mol = 0.067 mol
number of moles of KCl in 100 mL - 0.067 mol
therefore number of KCl moles in 1 L - 0.067 / 100 mL x 1000 mL = 0.67 M
molarity of KCl is 0.67 M
Answer:
The answer to your question is:
atomic number (Z): 6
mass number (A) : 13
Explanation:
Carbon has an atomic number of 6 and a mass number of 12,
Mass number = # protons + # neutrons
12 = 6 + # neutrons
#neutrons = 12 - 6 = 6
For the carbon isotope the atomic number does not change is still 6
13 = 6 + # neutrons
# neutrons = 13 - 6
# neutrons = 7
Answer: Gamma radiation
Explanation: Gamma radiation is very much like x rays. It has no charge, a very short wavelength and high energy. Gamma radiation is the most penetrating form of radiation considered in this section. It travels great distances through air (500 meters).
