Letter symbols corresponding to chemical electrical instruments

Letter symbols corresponding to chemical electrical instruments

Chemical Electrical Instrument

Using symbols to represent chemistry
It is indicated by symbols: 2 hydrogen atoms? 3 magnesium ions? 4 water molecules? Positive trivalent aluminum? N ferrous ions? 3 carbonate ions?
How many layers of electrons does the chlorine atom have? How many protons are there in the nucleus?
Chemical formula of methylphenol: (C7H8O), please calculate according to the chemical formula of methylphenol
1: The relative molecular weight of methylphenol is?
2: The mass ratio of carbon, hydrogen and oxygen in methylphenol is?
3: How many g methylphenol contains 6G hydrogen?
Potassium iodate (KIO 3) 1 000 g iodized salt contains about 0.02 g iodine
How many grams of potassium iodate contain 0.02g iodine?
Adults need about 1.5 * 10 negative four grams of iodine every day. Assuming that these iodine are absorbed from iodized salt, how many grams of iodized salt do adults need to use every day?

It is indicated by symbols: 2 hydrogen atoms? 3 magnesium ions? 4 water molecules? Positive trivalent aluminum? N ferrous ions? 3 carbonate ions?
2H,3Mg,4H2O,Al3+,nFe2+,3CO32-
How many layers of electrons does the chlorine atom have? How many protons are there in the nucleus?
3,17
The relative molecular weight of methylphenol is 7 * 12 + 8 + 16 = 108
The mass ratio of carbon, hydrogen and oxygen in methylphenol is? 84:8:16
How many g methylphenol contains 6G hydrogen element? 6 * 108 / 8
Adults need about 1.5 * 10 minus four grams of iodine per day. Assuming that these iodine are absorbed from iodized salt, how many grams of iodized salt? 1.5e-4 / 0.02 * 1000 per day should adults use