Question: 4. please help. Four Bright-Line Emission Spectra Unknown Gas Mixture Spectrum 400 600 700 nmi Hydrogen Gas Spectrum 500 600 700 nin Helium Gas Spectrum
4. please help.

Four Bright-Line Emission Spectra Unknown Gas Mixture Spectrum 400 600 700 nmi Hydrogen Gas Spectrum 500 600 700 nin Helium Gas Spectrum 400 500 GOO 700 nin Sodium Gas Spectrum 100 500 6DO 700 mil 4. According to the spectra above, the unknown gas mixture contains : O helium and sodium gases O hydrogen and sodium gases () hydrogen, helium, and sodium gases ( hydrogen and helium gases
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