Test question analysis: (1) According to the meaning of the chemical formula of sodium glutamate, the mass ratio of each element in the compound = the relative atomic mass of each atom × Analyze and answer the ratio of the number of atoms. (1)5;1:8． (2) +4 price; +2 price.

(2) Answer this question based on the fact that the sum of the positive and negative valence algebras in the compound is zero, and combine the chemical formulas of the products of the two carbon-containing elements.

Solution: (1) Sodium glutamate is composed of five elements: carbon, hydrogen, nitrogen, oxygen, and sodium; the mass ratio of hydrogen to oxygen is (1×8): ( 16×4)=1:8．

(2) The oxygen element shows a valence of -2. Assume that the valence of the carbon element in carbon dioxide is x. According to the algebraic sum of the positive and negative valences in the compound is zero, we can get: x+(-2)×2= 0, then x=+4 price.

The oxygen element shows a valence of -2. Assume that the valence of the carbon element in carbon monoxide is y. According to the algebraic sum of the positive and negative valences in the compound is zero, we can get: y+(-2)=0, then y= +2 price.

So the answer is: (1)5; 1:8. (2) +4 price; +2 price.

Comments: This question is not very difficult. It tests students’ ability to combine new information and flexibly use the meaning of chemical formulas and related calculations to analyze and solve problems.