The average atomic mass of lead given its three isotopes is 207.52.
<h3>What is average atomic mass?</h3>
Average atomic mass is the weighted average of the atomic masses of the naturally occurring isotopes of an element.
According to this question, the following isotopes with their percent abundance and atomic masses of lead are given:
- Pb-206 - 205.97 14.5%
- Pb-207 - 206.98 17.0%
- Pb-208 - 207.98 68.5%
- Pb-206 = 14.5/100 × 205.97
- Pb-207 = 17/100 × 206.98
- Pb-208 = 68.5/100 × 207.98
- Pb-206 = 29.865
- Pb-207 = 35.186
- Pb-208 = 142.466
The average atomic mass is as follows: 29.865 + 35.186 + 142.466 = 207.52
Therefore, the average atomic mass of lead given its three isotopes is 207.52.
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Answer:
Heres a very LONG answer-
The real answer:
Its in the kinetic-molecular theory, the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles.
Answer:
A. kinetic and potential
Explanation:
kinetic energy (energy of motion) or potential energy (stored energy of position)
- Hope that helped! Let me know if you need further explanation.
Answer:
The information that can be used to determine which mixture has the higher proportion of KCl IS INFORMATION ABOUT THE MASS OF CHLORINE IN EACH MIXTURE, THIS INFORMATION CAN BE OBTAINED BY USING THE LAW OF DEFINITE PROPORTION.
Explanation:
The law of definite proportion states that the chemical composition by mass of a chemical compound is always constant. For instance, a chemical compound that is made up of two elements will always contain the same proportions of the constituent elements regardless of the quantity of chemical that was used.
Using the law of definite proportion, we can determine the proportion of sodium and chlorine in NaCl and the proportion of potassium and chlorine in KCl if the mass of chlorine that was used is known. Based on the results obtained, one can easily determine the mixtures that has higher proportion of KCl.
