Um... I might be wrong but I think it would be A. Photosynthesis
Explanation:
Rate of the reaction ,k=
Half life of the
(first order kinetics)
Half life of the is 20,502.958 seconds.
Integrated rate equation for first order kinetics in gas phase is given as:
p= pressure of the gas at given time t.
= Initial pressure of the gas
(i) When, t = 50 sec
p = 500.49 Torr
(ii)When, t = 20 min = 1200 sec
p = 519.83 Torr
Answer: Alkaloids
A class of substances known as alkaloids are used for their medicinal properties.
Explanation:
Alkaloids are small but complex organic substances with at least one nitrogen atom in its ring structure. Hence, they have strong basic properties, and are produced in naturally by some plants.
Examples of alkaloids and their medicinal properties are as follows:
- caffeine, used in certain drug and drinks to stimulate the nervous system
- morphine, used to reduce pain and induce sleep in humans.
- cocaine, nicotine etc
Answer:
For 12.8 g there 0.807 × 10³ formula units.
Explanation:
Given data:
Mass of MgCl₂ = 12.8 g
Formula units for given mass = ?
Solution:
First of all we will calculate the number of moles.
Number of moles = mass/molar masss
Number of moles = 12.8 g/ 95.211 g/mol
Number of moles = 0.134 mol
According to the Avogadro number,
one moles = 6.022 × 10³ formula units
For 0.134 mol,
0.134 × 6.022 × 10³ formula units
0.807 × 10³ formula units
For 12.8 g there 0.807 × 10³ formula units.