Geology is the study of the Earth, the materials of which it is made, the structure of those materials, and the processes acting upon them.
Answer:
2,0894x10¹² tonnes of CO₂ in atmosphere
Explanation:
The total mean mass of the atmosphere is 5.1480×10¹⁸ kg. CO₂ is an important race gas in Earth's atmosphere because it is part of the carbon cycle.
405 ppm of CO₂ in atmosphere means 405 mg of CO₂ per kg of atmosphere. If the mass of the atmosphere is 5.1480×10¹⁸ kg:
In tonnes:
<em>2,0894x10¹² tonnes of CO₂ in atmosphere</em>
I hope it helps!
Answer:
Salt
Explanation:
It is because it has a defined composition.
TLDR: the answer is C. 0.875.
The basis of this problem is testing your fluency with half-life radioactive decay. The half-life of any radioactive substance represents the amount of time required for 1/2 of the amount of the substance to decay. So, if you had a 100 g sample of Carbon-14, after 5,730 years, only 50 g of Carbon-14 would remain; the other 50 g of substance would have decayed into another substance (Nitrogen-14). If another 5,730 years passes, only 25 g would remain, as half of that 50 g radioactive substance would have decayed.
In the problem, 28 g of Carbon-14 decays as 28,650 years passes, which, when divided by 5,730, yields a value of 5. This number represents the number of half lives that passes during this time. So, over the course of this time, the amount of radioactive substance is cut in half five times.
28 g - 14 g (1 HL) - 7 g (2 HL) - 3.5 (3 HL) - 1.75 g (4 HL) - 0.875 g (5 HL)
After 5 half lives, only 0.875 g of the original 28 g remains.
Answer:
positive charge
Explanation:
protons are the positive chargers of any chemical reaction unlike neutron which are just the neutral part
