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)
B: Painting over a metal surface in order to prevent rust is known as
rust proofing and it works by preventing oxygen and water from reaching
the metal surface thus preventing a redox reaction which would result in
rusting.
The answer to the question <u>Which conclusion can be made from Gay-Lussac's law</u> is For a constant volume, the pressure of a gas is directly proportional to the temperature in Kelvin
Gay-Lussac's law shows the relationship between the pressure of a fixed mass of gas and its temperature in Kelvin.
It states that for a constant volume, the pressure of a gas is directly proportional to the temperature in Kelvin.
Mathematically, P ∝ T
P = kT
So, the answer to the question <u>Which conclusion can be made from Gay-Lussac's law</u> is For a constant volume, the pressure of a gas is directly proportional to the temperature in Kelvin
Learn more about Gay Lussac's law here:
brainly.com/question/24002551
<span>Heterogenous mixtures are those which are seperable by physical means. These mixtures do not have uniform properties throughout the substance. For example, blood is a heterogenous mixture because it can be seperated into its components via a physical change (centrifugation). </span>
