Question

help with chemistry question anyone?

Answer 1

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

Answer 2

b) sodium

Answer 3

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

Answer 4

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

Answer 5

sure =D

Answer 6

d) phosphorus

Answer 7

none?

Answer 8

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

Answer 9

b) CO2

Answer 10

http://chemwiki.ucdavis.edu/Inorganic_Chemistry/Descriptive_Chemistry/Compounds/Oxides

Answer 11

a is

Answer 12

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

Answer 13

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

Answer 14

oh that does make sense! Now I see

Answer 15

760 mm Hg = 1atm = 101.325 kPa

Answer 16

Use this ratio to calculate: