Answer:
hco I believe
Explanation:
Pretty sure about this, when do you need to put it in?
A woman’s menstrual cycle usually lasts about 28 days *TRUE*
Answer: The ratio of the number of oxygen molecules to the number of nitrogen molecules in these flasks is 1: 1
Explanation:
According to avogadro's law, equal volumes of all gases at same temperature and pressure have equal number of moles.
According to avogadro's law, 1 mole of every substance contains avogadro's number
of particles.
Thus as oxygen and nitrogen are at same temperature and pressure and are in equal volume flasks , they have same number of moles and thus have same number of molecules.
The ratio of the number of oxygen molecules to the number of nitrogen molecules in these flasks is 1: 1
I believe it might be c I might wrong
Answer: Argon (Ar), which has 18 protons.