5. The unknown emissions spectra belongs to the element
Unknown
Hydrogen
Sodium
Mellum
Neon
Mercury
Wavelength
b) Mercury
a) Hydrogen
c) Neon
d) Sodium

Order the following from smallest to largest atom, electron, quark, proton, neutron, molecule, nucleus

How air particles exert a pressure on the inside of the balloon

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams