Chematik

Sulfides are salts or other derived substances from hydrogen sulfide (H2S). Salts are chemical...

Question | What are Sulfides?

Here is an explanation of...

Question | Explanation: Exothermic and Endothermic Reaction

In an exothermic reaction, energy is released to the environment, in an endothermic reaction, energy is absorbed from...

Question | Examples for Exothermic and Endothermic Reactions

At the oxyhydrogen gas sample, a mixture of hydrogen and oxygen is ignited. For this purpose, the hydrogen is filled...

Question | What is the formula for the oxyhydrogen gas sample?

Computing the covariance and correlation (the covariance is embedded in the correlation formula) depends on the fact,...

Question | Calculate Correlation or Covariance for non-equal Sample Sizes

Eggs are initially soft inside of the animal and they harden due to calcium deposits only gradually over time. Thereby,...

Question | Where does the shape of eggs come from?