Answer:
i think d is the answer for this
I’m pretty sure it’s A sorry if wrong
Answer:
Yes it is B,D.
Explanation:
Each box represents an element and contains its atomic number, symbol, average atomic mass, and (sometimes) name. The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups.
Endothermic reactions and Exothermic reaction are never the same.
They are both different.
Definitions
<span><span>Endothermic:- reactions that take in energy. For example:- electrolysis, thermal decomposition and the reaction between ethanic acid and sodium carbonate.
</span><span>Exothermic:- reactions that transfer energy to the surroundings. For example:- burning, neutralisation and the reaction between water and calcium oxide.</span></span>
Answer: 4.5165 *10^-23 moles Carbon
Explanation:
There are 6.022*10^23 atoms in a mole.
Therefore, there would be 6.022*10^-23*0.75 atoms in 0.75 moles of Carbon.
= 4.5165 *10^-23 moles Carbon