Answer: H+ ia helyuim
explinanation: Hope this helped!!
Any positive number of Celsius is going to be above freezing. 0°C is the freezing point of water. 100°C is the boiling point of water. So 214°C is going to be extremely hot, as it is well above 400°F which is around the temperature many ovens use to cook food.
As for Neptune, what I could find out is the the surface is around negative 200°C which is extremely cold.
Answer:
2.5×10⁶ s
Explanation:
From the question given above, the following data were obtained:
Rate constant (K) = 2.8×10¯⁷ s¯¹
Half-life (t½) =?
The half-life of a first order reaction is given by:
Half-life (t½) = 0.693 / Rate constant (K)
t½ = 0.693 / K
With the above formula, we can obtain the half-life of the reaction as follow:
Rate constant (K) = 2.8×10¯⁷ s¯¹
Half-life (t½) =?
t½ = 0.693 / K
t½ = 0.693 / 2.8×10¯⁷
t½ = 2.5×10⁶ s
Therefore, the half-life of the reaction is 2.5×10⁶ s