-
Anonymous users2024-01-241. Thyroid enlargement can occur due to iodine deficiency.
2. Detergent has an emulsifying function, which can disperse the oil into fine droplets and flow away with the water, without agglomerating into large oil beads.
3 NaHCO3 + HCl = NaCl + H2O + CO2 (gas symbol).
-
Anonymous users2024-01-23He said it all, and I won't say it.
(1) It is known that the valency of potassium is +1 valence, and the valency of oxygen is -2 valence, according to the principle of valency (the algebraic sum of positive and negative valency in the compound is zero), then let the valency of iodine element be x, then (+1)+x+3 (-2)=0, and the solution is x=+5; >>>More
(3) The calcium content on the packaging bag refers to the content of the element rather than the content of elemental calcium, because the calcium salt contains calcium carbonate instead of calcium element, so the answer is: calcium. >>>More
(1) Vegetables and fruits are rich in vitamins, rice and steamed bread are rich in starch, starch belongs to sugar, and sugar is the main energy supply substance of the human body >>>More
(1) A Eggs mainly contain protein;
b Apples mainly contain vitamins; >>>More
1) D, A (2) Reduce the temperature below the ignition point (3) C test question analysis: (1) Metal materials include pure metal source side box alloy; Synthetic materials include plastic collapse, synthetic fibers, and synthetic rubber; >>>More