Answer:
mass of CO2 = 20.9 g
Explanation:
Given that:
mass of O2= 30.4 g
molar mass O2 = 32
number of moles of O2 = 30.4 / 32
number of moles of O2 = 0.95 moles
The Volume of O2 = 2V
Using ideal gas equation:
PV = nRT
P × (2V) = 0.95 × R × T
PV = 0.475 RT ----- (1)
For CO2;
The volume = V
Using ideal gas equation:
PV = nRT ---- (2)
Equating equation (1) and (2) together, we get:
0.475 RT = nRT
Dividing both sides by RT
(0.475 RT)/RT = (nRT)/RT
0.475 = n
Thus, the number of moles of CO2 = 0.475
Since mass = number of moles × molar mass
mass of CO2 = 0.475 × 44
mass of CO2 = 20.9 g
Answer:
NH4Cl, NaCl, Ba(OH)2, NaOH
Explanation:
NH4Cl is an acidic salt formed by the neutralization of a strong acid (HCl) with a weak base (NH3). Hence, it will habe a PH<7 (the lowest PH).
NaCl is a neutral salt,formed by neutralization of a strong acid (HCl) with a strong base (NaOH). Hence, it will have a PH of 7.
Ba(OH)2 is a weak base. Therefore, it will have a PH between 8 and 10.
NaOh meanwhile, is a strong base. Therefore, it will have a PH between 10 to 13.
Hence, we have
NH4Cl < NaCl < Ba(OH)2 < NaOH
Answer:
663 g
Explanation:
Step 1: Write the balanced equation
2 LiOH + CO₂ ⇒ H₂O + Li₂CO₃
Step 2: Calculate the moles corresponding to 825 L of CO₂
At standard pressure and temperature, 1 mole of CO₂ has a volume of 22.4 L.
825 L × 1 mol/22.4 L = 36.8 mol
Step 3: Calculate the moles of H₂O formed from 36.8 moles of CO₂
The molar ratio of CO₂ to H₂O is 1:1. The moles of H₂O formed are 1/1 × 36.8 mol = 36.8 mol.
Step 4: Calculate the mass corresponding to 36.8 moles of H₂O
The molar mass of H₂O is 18.02 g/mol.
36.8 mol × 18.02 g/mol = 663 g
Answer:
D
Explanation:
The answer is D- There are more collisions of air molecules against the wall of the balloon.
No, x-rays do not travel slower than infrared radiation or even the opposite. Both are travelling in vacuum therefore they travel at same speed. They differ in the frequency of the electromagnetic waves.