Answer:
how can I get free points?
Answer:
BF 3
Explanation:
The geometry of the BF 3 molecule is called trigonal planar The fluorine atoms are positioned at the vertices of an equilateral triangle. The F-B-F angle is 120° and all four atoms lie in the same plane.
Answer:
A Calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.
Explanation:
Ex- when an exothermic reaction ( accompanied by or requiring absorption of heat)occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution increasing its temperature.
- When an endothermic reaction (Heat evolving reaction) occurs, the heat required is absorbed from the thermal energy of the solution, decreasing its temperature.
A burning piece of coal which is releasing heat due to its combustion and is transferred to water.
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Answer:
Explanation:
an atom consists of prontons electrons and neutrons.
The nucleus is positively charged proven by the Rutherford experiment. The protons and neutrons are in the nucleus so the charges cancel out. The electrons are surrounded in the shells that are negatively charged.