Answer: A
Explanation:
Because we make hypothesis to find an answer to our observation or question. So if the Hypothesis is correct then the then a scientific explanation proves that a hypothesis is true. We also need more data and evidence to explain a scientific theory or question. A scientific expirement should be tested by many scientists to see if the results are correct. The more scientists aprove and the more evidence we have, the more correct our expirement is.
((hope this helped!)
There are a couple of ways todetermine if a reaction is exothermic or endothermic. Endothermic meaning that heat is added to the reaction to make the reactants interact and exothermic meaning heat is released during the reaction between the two reactants.
In endothermic reactions you can find a triangle above the arrow.
<span>Wrap a magnet in plastic lunch wrap and move it through the mixture of the three solids. The iron filings will stick to the magnet. The filings can be removed by unwrapping the plastic from the magnet carefully! Mix the remaining salt and sand in water and stir.</span>
Sodium. It reacts with most of every other element.
Answer:
R.F.M of Iron (II) oxide :
Moles :
Molecules :
