Answer:
A
Explanation:
A common example of heterogeneous catalysis is the hydrogenation reaction of simple alkenes. The conversion of ethene (C2H4) to ethane (C2H6) can be performed with hydrogen gas in the presence of a metal catalyst such as palladium (“Conversion of Ethene to Ethane with Hydrogen and a Metal Catalyst”).
All inside and out in the human body
Every part helps an organism living in it survive
K (Potassium) has higher molar entropy than sodium.
The substance's condition has the most impact on the molar entropy. Compounds that are gases will have a far higher molar entropy than compounds that are liquids or solids because gases are much more widely dispersed. A substance's entropy rises as its molecular weight, complexity, and temperature rise. As the pressure or concentration decreases, the entropy likewise rises. Gas entropies are significantly higher than those of condensed phases. The highest entropy is in gases. This is due to the wide variety of microstates in which gases can reside. The amount of freedom that atoms in a substance have to disperse, migrate, and organize themselves randomly is referred to as entropy.
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Answer:
You have to use a sufficient amount of heat, to make a zinc plated copper penny into a gold color
There are also 7 detailed steps you can use if you are tryin got make gold pennies
1.Pour 20 mL of NaOH solution to the dish.
2.Add the zinc dust in the dish with the NaOH, and gently swirl the mixture together.
3.Set the hot plate to medium heat and place the evaporating dish on top.
4.Heat for 5 minutes. Do not boil. When the dish is hot, place a penny in it. Heat for two minutes or until the penny is coated and becomes silver in appearance.
5.Remove the penny from the dish with tongs and drop it into water. When cool, wipe the penny clean with a cloth to remove any excess zinc.
6.Using tongs, hold the penny in the flame of a Bunsen burner and gently heat. The penny should turn “gold” (brass). (Do not overheat the penny.)
7.Dip the penny in the beaker of water until it is cool to the touch.