Question One
It's more a question of unscrambling what is there. The answer is correct.
If you look at your periodic table, there is such an element as Na which I suspect might be the problem.
It has an atomic mass of 23. It's atomic number is 11 which means it is the 11th member (by mass) on the periodic table. The other 2 are oxygen and hydrogen. So Oxygen has an atomic mass of 16 and Hydrogen has an atomic mass of 1.
Oxygen is number 8 on the periodic table and hydrogen is number 1.
Molecular Mass
Na = 23
O = 16
H = 1
Total 40, just as the answer key says. I've probably given you more than you wanted to know, but if you still have trouble, leave a note.
<span>The right answer here is that the best explanation for why the rusting of an iron nail in the presence of water and oxygen is an oxidation-reduction reaction is answer B) electrons are transferred. This is the only answer that actually explains the chemical reasoning behind the reaction.</span>
Answer:
Because of its malleability.
Explanation:
Magnesium is alkaline earth metal.
It is present in second group.
It is shiny gray color metal.
It is lighter but strong.
Its density is 1.738 g/mL.
It is soft and can be malleable. Magnesium ribbons are also formed by stretching the magnesium metal and this is due to the malleability of magnesium.
Magnesium ribbon burns and produces heat.
It is used to make the many light weight products such as many parts of car, phone, laptop, luggage etc.
It is also used to remove the sulfur such as from iron and steel.
It is also used in fireworks.
It is also used in medicine such as for constipation.
It is used as antiacid for heart burn.
Test his theory like a model theory or research more common ideas
