help with chemistry question anyone?

Question

anonymous · Answer

Depends on what kind and level of question....

anonymous · Answer

b) sodium

anonymous · Answer

a) carbon: 4 valence electrons
b) sodium: 1 valence electrons
c) oxygen: 6 valence electrons
d) phosphorus: 5 valence electrons

anonymous · Answer

I  have a couple more questions if you don't mind

anonymous · Answer

sure =D

anonymous · Answer

d) phosphorus

anonymous · Answer

attachment

anonymous · Answer

none?

anonymous · Answer

In a formula, an acid can be recognized by an "H" in the front
ex: HCl, HBr, HNO3 
and none of the options given appears to be an acid

anonymous · Answer

b) CO2

anonymous · Answer

anonymous · Answer

a is

anonymous · Answer

in any given balanced equation, everything is proportional. It would be incorrect to use gram as the unit because the atomic mass is different

anonymous · Answer

whereas d, it is still correct because the proportion remained, everything was a factor of 2

anonymous · Answer

oh that does make sense! Now I see

anonymous · Answer

760 mm Hg = 1atm = 101.325 kPa

anonymous · Answer

Use this ratio to calculate:
|dw:1390455589775:dw|