40,500 mg---> 3 SF Zeros to the left of an understood decimal point and at tge same time to the right of a non zero number and not significant. The zero in between non zeros(4&5) is significant.
Answer:
creo que es cinemática, eso creo
boron because the farther down the table you go the stronger the elements get
Answer:
142.0 moles CO₂
Explanation:
To answer this question, we first need to know what a mole is. A mole represents of something, and in this case, that something is molecules.
So, to convert molecules into moles, we need to use the conversion factor .
Doing so (using dimensional analysis) gives us:
Answer:
Magnesium oxide
Explanation:
When magnesium reacts with oxygen, the magnesium atoms donate electrons to O2 molecules and thereby reduce the oxygen. Magnesium therefore acts as a reducing agent in this reaction. The O2 molecules, on the other hand, gain electrons from magnesium atoms and thereby oxidize the magnesium.