Probably look up the descriptions of the element and see if it matches the mineral.
1. Is a (primary)
2. Is 2 (c)
3. Not sure sorry ✨
4. HBr (b)

<span>2 NaOH(aq)+ 2 Al(s)+ 2 H</span>₂<span>O → 2 NaAlO</span>₂<span>(aq)+ 3 H</span>₂<span>(g)
</span> 2mol : 2mol : 3mol
2,14mol : 1,89mol : 2,835mol
remains completely consumed
2,14-1,89=0,25mol
A) Al
B)

C)
Answer : The concentration of guanosine in your sample is, 
Explanation :
Using Beer-Lambert's law :

where,
A = absorbance of solution = 0.70
C = concentration of solution = ?
l = path length = 1.00 cm
= molar absorptivity coefficient guanosine = 
Now put all the given values in the above formula, we get:


Thus, the concentration of guanosine in your sample is, 
Answer:
B
Explanation:
it is the energy stored in the chemical bonds of a substance