Answer : The volume of the balloon at STP is, 2.04 L
Explanation :
First we have to calculate the moles of dry ice.
Molar mass of dry ice 
= 44 g/mol
Now we have to calculate the volume of dry ice.
As we know that 1 mole of substance contains 22.4 L volume of gas.
As, 1 mole of dry ice contains 22.4 L volume of gas.
So, 0.0909 mole of dry ice contains 0.0909 × 22.4 L = 2.04 L volume of gas.
Thus, the volume of the balloon at STP is, 2.04 L
Answer:
pH → 7.46
Explanation:
We begin with the autoionization of water. This equilibrium reaction is:
2H₂O ⇄ H₃O⁺ + OH⁻ Kw = 1×10⁻¹⁴ at 25°C
Kw = [H₃O⁺] . [OH⁻]
We do not consider [H₂O] in the expression for the constant.
[H₃O⁺] = [OH⁻] = √1×10⁻¹⁴ → 1×10⁻⁷ M
Kw depends on the temperature
0.12×10⁻¹⁴ = [H₃O⁺] . [OH⁻] → [H₃O⁺] = [OH⁻] at 0°C
√0.12×10⁻¹⁴ = [H₃O⁺] → 3.46×10⁻⁸ M
- log [H₃O⁺] = pH
pH = - log 3.46×10⁻⁸ → 7.46
Answer:True
Explanation: Moment magnitude is used by the USGS- it is based on the total moment release of the earthquake. Moment is a product of the distance and the force. The moment magnitude scale gives an esitmate of the total energy released from the earthquake
The best and most correct answer among the choices provided by the question is the fourth choice or letter D.
<span>A2+ would represent the ion of an element from Group 2A</span>
I hope my answers has come to your help. God bless and have a nice day ahead!
