Answer:
When water temperature increases (right), the rate of evaporation also increases. In turn, the amount of water vapor in the "air space" above the water increases. ... But, with increased evaporation, more water molecules exist in the air above the water, which in turn increases the condensation rate.
Answer:
Both
Explanation:
Depends on which reaction reffered
Concentration Definition. In chemistry, concentration refers to the amount of a substance per defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution. Concentration usually is expressed in terms of mass per unit volume.
Concentration = no of moles of solute/solvent
Answer:
355.5 g.
Explanation:
- The balanced equation for the mentioned reaction is:
<em>2Al + 6HCl → 2AlCl₃ + 3H₂,</em>
It is clear that 2.0 moles of Al react with 6.0 mole of HCl to produce 2.0 moles of AlCl₃ and 3.0 mole of H₂.
- Firstly, we need to calculate the no. of moles of (87.7 g) of Al:
no. of moles of Al = mass/atomic mass = (87.7 g)/(26.98 g/mol) = 3.251 mol.
<em><u>Using cross multiplication:</u></em>
2.0 mol of Al need to react → 6.0 mol of HCl, from stichiometry.
3.251 mol of Al need to react → ??? mol of HCl.
∴ the no. of moles of HCl needed to react with (87.7 g) 3.251 mol of Al = (3.251 mol)(6.0 mol)/(2.0 mol) = 9.752 mol.
- Now, we can get the mass of HCl needed to react with (87.7 g) 3.251 mol of Al:
<em>mass of HCl = (no. of moles)(molar mass) </em>= (9.752 mol)(36.46 g/mol) = <em>355.5 g.</em>
