Answer:
0.136g
Explanation:
A student dissolved 5.00 g of Co(NO3)2 in enough water to make 100. mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275. mL of a final solution. How many grams of NO3- ion are there in the final solution?
Initial mole of Co(NO3)2 
Mole of Co(NO3)2 in final solution
Mole of NO3- in final solution = 2 x Mole of Co(NO3)2
Mass of NO3- in final solution is mole x Molar mass of NO3
Answer:
Chicken fat is in the shallowest area because, being hydrophobic and lipid content of chicken, it is the lowest density compound in the broth, therefore it rises and does not precipitate. All fats usually float in liquid media because their density is less than that of water.
On the other hand, the gelatin that forms in the boil of the chicken broth is a gelatinous compound that is very nutritionally rich, consisting of denatured proteins that leave the chicken undergoing aqueous coagulation.
Both do not mix and due to the difference in densities, but in order to dissociate it, it is convenient to use emulsifiers or by cryogenic methods where cold is applied and its division is better.
Explanation:
In liquid media such as chicken broth, or any broth, when proteins or foods that contain a large amount of fats and proteins are boiled, the fatty layer will always be the most superficial because it is the one with the lowest density, therefore, that denatured coagulated protein with water it will be the next layer and finally the solids such as bone or cartilage remains would be in the deepest area because they are the ones with the highest density.
Another method to dissociate these products is through enzymatic activity, throwing enzymes into the broth formed.
Both elements and compounds are pure substances. While elements are not made of simpler substances, compounds are made up of two or more chemical elements that are chemically combined.
The correct answer is C) A substance changes color when heated, but changes back when cooled. Hope this helps.
Answer:
Homologous series is defined as a systematic order of structurally similar organic compound containing same functional group in their family and two adjacent members differ in their molecular formula by -CH2 unit.
Characteristics:
1.Various members of homologous series contain same functional group.
2.Various members of homologous series can be represented by common formula.
3. All members of a homologous series have almost similar chemical properties.
4. All members have common method of preparation.
5.Two successive members of homologous series have different chain length or difference in their molecular formula by -CH2 unit.
6.The members of homologous series show different physical properties.
