Answer:
NH3
Explanation:
When hydrogen and nitrogen react it forms ammonia which is also as Haber's process
Answer:
B
Explanation:
The atoms that started out in hydrogen peroxide molecules are rearranged to form water molecules.
Answer:
C-14 can be used for dating fossils (50,000-70,000 years)
Explanation:
A fossil is a preserved remains of a once-living organism from a past geological age. Moreover, radioactive decay is a natural process by which an unstable atomic nucleus loses energy by emitting radiation. C-14 (Carbon 14) is a radioactive isotope of carbon that emits radiation which is widely used for dating fossils. C14 decays into the stable isotope C 12 and this radioactive isotope (C-14) has a half-life of 5730 yrs, thereby it is possible to use this rate of decay in order to calculate the age of an object according to the proportion of C14 remaining. The short half-life of C-14 indicates that this radioactive isotope cannot be used to date extremely old fossils (after 50,000-70,000 years, the C-14 dating method is no longer valuable for estimating the age).
Answer:C. Mushrooms grow only in association with grass.
Explanation:
Hypothesis is a statement which includes proposed information for the cause of a particular process.
The mushroom colonizes in a form of circle in the grass lawn. It might be a pattern of development of these mushrooms. Supported by the mineral and nutrients they derive from the grass.
Thus C is the correct option.
