Luncar Eclipses are more common than solar eclipses because of the size of the Shadowmaker. The Earth is much bigger than the moon so it's easier to find the moon in the earth's shadow. In Solar Eclipses though, the Earth must Path through the moons relatively small shadows, and the 3 have to be aligned Just right to get a moon shadow focused on the Earth.
Few People get to view a total solar eclipse because when it finally happens, the part of Earth that is in the Darkest center of the shadow is somewhere small and randon
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0.22 moles of Al₂(CO₃)₃
Explanation:
The decomposition reaction of aluminium carbonate (Al₂(CO₃)₃):
Al₂(CO₃)₃ → Al₂O₃ + 3 CO₂
Taking account the chemical reaction we devise the following reasoning:
if 1 mole of Al₂(CO₃)₃ produces 3 moles of 3 CO₂
then X moles of Al₂(CO₃)₃ produces 0.65 moles of 3 CO₂
X = (1 × 0.65) / 3 = 0.22 moles of Al₂(CO₃)₃
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decomposition reaction
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Molar mass of FE2O3=2(55.85)+3(16)=159.7
2.56g*1mol/159.7*2mol/1mol*55.85g/1mol=1.79g
Exothermic is when heat escapes an object. So the answer should be the last one.
Firstly, the chemical equation between the calcium metal and water will be:
Ca(s) + 2 H₂O(l) → Ca(OH)₂(aq) + H₂(g)
We can see from the equation the bubbles of hydrogen gas which are formed during the reaction stick to the surface of the metal and hence calcium floats on water.
The other metal that will float on the water during the reaction is magnesium which have the same chemical behavior like calcium, we can illustrate that by the chemical equation:
Mg(s) + 2 H₂O(l) → Mg(OH)₂(aq) + H₂(g)