Answer:I believe that the answer is c
Explanation: photosynthesis gives us oxygen to breath therefore it is helpful to humans
What subject is this again ? If I know now then I would have a better understanding of what I’m gonna answer so you don’t get it wrong !
The one main reasons of satellites is to take pictures of outer space and the earth to observe different atmospheres.
From the periodic table:
mass of hydrogen = 1 grams
mass of oxygen = 16 grams
mass of carbon = 12 grams
This means that:
mass of one mole of aspirin = 9(12) + 8(1) + 4(16) = 180 grams
number of moles can be calculated using the following rule:
number of moles = mass / molar mass
number of moles = 0.4 / 180 = 2.223 x 10^-3 moles
Because it is a solid material, it is known as a dry lubricant. This is useful in applications where “wet” lubricants, such as oil, cannot be used<span>. </span>Graphite<span> is the only non-metal element that is a good conductor of electricity. Natural </span>graphite<span> is </span>used <span>mostly in what are called refractory applications.</span>