Iron undergoes a chemical reaction called oxidation to form rust, or iron oxide. ... Copper forms a turquoise colored oxide and silver forms a black oxide. In both cases you know that a chemical reaction has taken place because of the color change.
Answer:
Read below. You should probably not take my advice for blue cheese salad dressing.
Explanation:
Table Salt (NaCl) is a molecule made up of 2 atoms,
Sodium (Na) and Chlorine (Cl)
Blue Cheese Salad Dressing is probably a heterogeneous mixture (I don't know it's ingredients) or a solution (Was something dissolved in it?)
Iron (Fe) is an element in the Periodic Table of Elements.
Throwing isn't classified as a force so I'd say C but it is a force just not a type
<span>The Avogadro constant, named after the scientist Amedeo Avogadro, is the number of constituent particles, usually atoms or molecules, that are contained in the amount of substance given by one mole. The answer, in this case, would be 0.0004999...*10^23 = (10^19)*(4.999... [any finite number of 9s]).</span>
Answer : The heat energy required to melt 2 kg of ice was, 667.7 kJ
Explanation :
First we have to calculate the moles of ice.
Now we have to calculate the heat energy.
As, heat energy required to melt 1 mole of ice = 6.01 kJ
So, heat energy required to melt 111.1 mole of ice = 111.1 × 6.01 kJ
= 667.7 kJ
Therefore, the heat energy required to melt 2 kg of ice was, 667.7 kJ
