Answer:
21 electrons
Explanation:
just subtract their atomic numbers since the atomic number has the same amount of electrons as it has protons
Your task is to measure the amount of energy evolved during the combustion of some hydrocarbon, then the ideal technique for this experiment would be : Bomb calorimetry
<h3>What is bomb calorimetry?</h3>
Hydrocarbons are combustibles means that they can react in a combustion reaction to produce energy. To measure this energy, it's a necessary equipment so that the reaction can be placed in a controlled way.
The bomb calorimeter is the equipment, which is an adiabatic vessel, with water and heat is calculated based on the increase in the temperature of the water.
Coffee-cup calorimetry is used to measure the heat of a dissolution reaction and bomb manometry is used to measure the pressure.
To know more about bomb calorimetry, refer
brainly.com/question/29425839
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Answer: 0.1 meters
Explanation: move ten down a place value and u get .10 which is equal to 0.1 meters