For 23., you have to find a way to measure your heart rate not increase it. search it up on google.
Answer:
Explanation:
Its simple
This is the number of atoms, ions, or molecules that a central atom or ion holds as its nearest neighbours in a complex or coordination compound or in a crystal.
for example: Sodium chloride (NaCl) or table salt is an ionic compound. It means that each cation will have exactly one anion associated with it, which means the cation Na+ and the anion Cl− have the same number of coordinates.
It may be really confusing at first
I recommend you go online and watch tutorial videos on the topic
Answer:
I think it's commensalism
Explanation:
<span>Divide each % value by respective atomic mass
Mn = 63.0/54.94 = 1.1467
O = 37/16 =2.3125
Divide by smaller value
Mn = 1
O = 2.3125/1.1467 = 2 Empirical formula = MnO2</span>