You can use the law of superposition:in horizontal sedimentary rock,the oldest layer is at the bottom.the more layers up is younger than the ones under
Molecular weight of AgBr = 187.7
moles of Ag =

moles of Br = moles of Ag = 2.96 x 10⁻³ mol
concentration of HBr (Molarity) = conc. of Br (strong acid) =
Answer:
Helium, this noble gas has the least density at STP
Explanation:
Answer: option D.
The total number of atoms of each element on both sides of the
equation must be the same.
Explanation: