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Anonymous users2024-01-24(1) Physical properties: properties of substances that do not need to undergo chemical changes, such as: color, state, odor, density, melting and boiling point, etc
So the answer is: physics.
2) The acid solution will ionize H+, so the acid has a commonality, that is, the metal in front of the hydrogen in the metal activity order will react with the acid; The acid also reacts with certain salt solutions
Therefore, the answer is: acids react with pre-hydrogen metals in the table of metal activity sequences, and acids react with certain salt solutions
3) Let the net weight of white vinegar xg, then x12%=60 solution x=500g;
Therefore, the mass of water in this white vinegar = 500-60 = 440g=, and because 1 water molecule is about 3 10-26 kg, the number of water molecules in the water =
26=So the answer is: 60;
1 smell can be distinguished 2 freezer frozen ice for vinegar, and vice versa for alcohol. 3 Add water in a ratio of 1:10 and dip it to taste. 4. Take a small amount, add some edible alkaline noodles, bubble into vinegar, and vice versa. The above four can be distinguished without leaving the kitchen.
(1) The smell of a substance belongs to the physical properties of a substance; >>>More
Generally first visual inspection, you can see that he is a colorless liquid, and then fan to smell, open the bottle cap, fan out the smell with your hands, and further confirm what it is, the colorless liquid in the kitchen is generally alcohol, or white vinegar, water, basically can be smelled, if it is a banana smell is banana water, it may be left after decoration.
It depends on what you clean, you can use it for a month or two to wipe the stove, the frequency of use is not high, it is almost the same once a week, and it is basically not enough to use it to clean the range hood.
When opening a restaurant, you must first be clear! Anything that is not related to the operation of the kitchen is not allowed in the kitchen! Your sesame oil was found in the kitchen, and it wasn't in the container, so it's a food safety violation! >>>More