How to write the chemical formula of sodium hydroxide?

Question 1: Sodium reacts with water to produce sodium hydroxide and hydrogen. 2Na+2H2O=2NaOH+H2 gas

Question 2: Why does it take a year for the hot earth to circle the skeleton in summer? Although the earth is a little far from the sun in summer, the sun shines directly on the surface of the earth, and places of the same size get more sunlight, so the weather is hot.

Question 3: Chemical formula and relative molecular weight of sodium hydroxide. The chemical formula is NaOH, and the relative molecular weight of NaOH is 23+ 1+ 16 = 40.

Commonly known as caustic soda, caustic soda, caustic soda (also known as "Costa's" in Hong Kong), it is a highly corrosive alkali, which is generally flaky or granular, easily soluble in water to form an alkaline solution, deliquescent and easy to absorb water vapor in the air. Sodium hydroxide also has different uses. It is one of the essential chemicals in the chemistry laboratory and one of the common chemicals.