Hey! The best way I learned is if when I write it out put a space where a number should be
Answer:
In the water molecule oxygen combines with two hydrogens and so has a valency of 2. A simple diagram of a water molecule makes this plain. The hydrogen atoms are each sharing one pair of electrons - they have a valency of 1. The oxygen atom is sharing two pairs of electrons - it has a valency of 2.
Answer:
https://www.topperlearning.com/answer/arrange-the-following-in-correct-and-standard-sequence-of-classification-class-species-kingdom-phylum-order-genus-family/l9ujubd33#:~:text=The%20correct%20sequence%20is%3A%20Kingdom,%2C%20Family%2C%20Genus%2C%20Species.
Explanation:
Hope this link helps
I am not completely sure what your question is, but I think you are asking about the molar mass? It is a mole conversion. For example, if you start with atoms and want grams, you would need to get rid of the atoms unit first then get rid of the mols unit: so you would have to multiply it by (1 mol / Avogadro's number) X (molar mass / 1 mol) = this is the conversion factor that gives you grams. I hope this helped!
Have a fantastical day,
Em
X rays are the correct answer :)
