Im assuming, if you find rare earth elements, it is important to the technological world bc you can make more products more better, and even invent new and more modern things.
The answer would be D carbon dioxide
It describes how, when particles/mc/elements react, despite forming different substances the mass is neither created nor destroyed but only converted.
I believe 1 is growth and 2 is reproduction. Hope this helps.
To calculate number of moles, all you do is divide the given mass by the molecular molar mass:
<span>i.e. 125g / 18g = 6.94444g </span>
<span>Therefore, your answer is (a) 6.94 g</span>