(D) exposure of a photographic plate
Answer:
2Na(s) + 2H2O(l) ------> 2NaOH(aq) + H2(g)
Explanation:
Using ideal gas equation, PV = nRT, and since there is no volume change and amount change, the equation is now P = kT, where k =nR/V. Temperature must be in kelvin
From the given, k = (0.82)/ (21 + 273) = 2.78 x 10^-3
Substituting T = -3.5+273, P = 0.75 atm
The incorrect statement is that; "Aristarchus calculated the distances between the sun and earth fairly accurately."
<h3>The size of the solar system</h3>
The solar system is composed of the sun, the planets and other celestial bodies such as the moon. We can see form the experiment that Aristarchus tried to determine the relative sizes of the earth and the moon.
However, the incorrect statement is that; "Aristarchus calculated the distances between the sun and earth fairly accurately."
Learn more about the solar system: brainly.com/question/12075871
The early atmosphere of the earth would consist of gases like nitrogen and carbon dioxide and about 2.5 billion years ago oxygen started to form and some of these gases would have been expelled by volcanoes and also the atmosphere would stay close to the surface of the earth due to gravity that held it there.
