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BigorU [14]
3 years ago
11

What is the atomic number of the atom in the diagram above please ?

Chemistry
1 answer:
Daniel [21]3 years ago
3 0

Answer:

5

Explanation:

The atomic number is the number of protons in an atom. Protons are the positively charged particles in the nucleus. The number of protons define the identity of an element. An element with 5 protons is Boron, no matter how many neutrons may be present.

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Calculate the change internal energy (ΔE) for a system that is giving off 65.0 kJ of heat and is performing 855 J of work on the
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Answer:  -64.1 kJ.  

Explanation:

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w = work done by the system=-P\Delta V  {Work is done by the system is negative as the final volume is greater than initial volume}

w = -855 Joules = 0.855 kJ     (1kJ=1000J)

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\Delta E=-65.0J-(-0.855J)=-64.1kJ

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