If an oxygen isotope has 8 protons and 10 neutrons in its nucleus, what is its atomic mass?
a) 10
b) 8
c) 18
d) not enough information to calculate

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon