The apparent brightness, or apparent magnitude, depends on the location of the observer.Different<span> observers will come up with a </span>different<span> measurement, depending on </span>their<span> locations and distance from the star. Stars that are closer to Earth, but fainter, </span>could<span> appear brighter than far more luminous ones that ...</span>
Answer:
C
Explanation:
In the presence of a catalyst, both the forward and reverse reaction rates will speed up equally. :)
The answer is 72973739373
Answer:
Iodine is a mineral found in some foods. The body must have iodine to make thyroid hormones. The hormones control the body's metabolism and many other important functions. Without iodine, thyroid hormone production can decrease.
Explanation:
The chemical formula for quartz is SiO₂. It has a molar mass of 60.08 g/mol. We use this to find the moles of quartz.
Moles of quartz = 1.90 g(1 mol/60.08 g) = 0.03162 moles
From the chemical formula, there are 2 moles of Oxygen per 1 mole of SiO₂.
Moles of oxygen = 0.03162 moles*2 = 0.063249 moles O
We use the Avogadro's number, 6.022×10²³ atoms/mole, to find the number of oxygen atoms.
0.063249 moles O * 6.022×10²³ atoms/mole = <em>3.81×10²² atoms of oxygen</em>
