Relative dating is the process of determining whether an object or event is older or younger than other objects or events. Absolute dating is d<span>etermining the age of an event or object in years. From absolute dating, the real age of the object is obtained which is not present for relative dating. Hope this helps.</span>
Largest
K
Ca
Ga
Ge
As
Br
Kr
Smallest
Answer:
8613.5 g
Explanation:
The formula for the calculation of moles is shown below:
For
Mass of = 300 g
Molar mass of = 2.016 g/mol
The formula for the calculation of moles is shown below:
Thus,
According to the given reaction:
4 moles of will react 1 mole of
1 mole of will react 1/4 mole of
148.81 moles of will react 148.81/4 mole of
<u>Moles of required = 37.2025 mol</u>
Molar mass of = 231.53 g/mol
<u>Mass of = Moles × Molar mass = 37.2025 × 231.53 g = 8613.5 g
</u>
Alpha radiation can only travel a few centi-metres in air and can be stopped (or absorbed) by a sheet of paper. Alpha particles can only penetrate a very thin sheet of paper and is totally blocked by the concrete. As these particles move through the air, it loses energy from the collisions with air molecules making it less penetrating.<span>
On the other hand:
Beta radiation can travel a bit further, around tens of centi-metres in air so a thicker substance is required to absorb the radiation. It can be stopped by a thin sheet of aluminium.
Gamma radiation however can travel for many meters so it requires a material much thicker to absorb it.</span>
I cannot answer this question if no initial mass for aluminum is given. Le'ts just suppose the initial mass of aluminum is 5 g. The reaction would be:
2 Al + 6 HCl --> 3 H₂ + 2 AlCl₃
The stoichiometric calculations are as follows:
Mass H₂ = 5 g Al * 1 mol/27 g Al * 3 mol H₂/2 mol Al * 2 g H₂/mol = <em>0.556 g H₂ produced</em>