Answer:
Concentrations:
1. 12 g salt in 3 L water = 0,4 g salt / 100 ml water
2. 12 g salt in 6 L water) = 0,2 g salt / 100 ml water
3. 30 g sugar in 5 L water) = 0,6 g sudar / 100 ml water
Explanation:
The given data are expressions to deal with the concentration of solutions (a kind of homogeneous mixtures).
There are many forms or units to express the concentrations of the mixtures.
The three cases show mass of solute (salt or sugar) in volume of solvent (water).
One form to express the concentration of the solutions is as mass of solute per 100 mililiters of solvent, which is useful to compare with solutibility tables.
You can do that using the formula:
- (mass of solute in grams / volume of solvent in mililiters) × 100.
To find the concentrations of the given solutions, first you need to convert the volume of the solvent to mililiters (ml):
- 3 L water × 1,000 ml / L = 3,000 ml water
- 6 L water × 1,000 ml / L = 6,000 ml water
- 5 L water × 1,000 ml / L = 5,000 ml water
Concentrations:
1. (12 g salt / 3,000 ml water) × 100 = 0,4 g salt / 100 ml water
2. (12 g salt / 6,000 ml water) × 100 = 0,2 g salt / 100 ml water
3. (30 g sugar / 5,000 ml water) × 100 = 0,6 g sugar / 100 ml water
Breeding or more precisely artificial breeding is done in both plants and animals. Plants and animals with superior qualities are chosen and allowed to interbreed to produce superior quality breed. The major benefit is to meet the demands of increasing population i.e., with the help of selective breeding techniques we can increase the yield of milk from cows or the agricultural yield can be enhanced. We can introduce pest and insect resistance traits in plants. Superior breed of chickens can be made which produce large size eggs.
Answer: All the given symptoms describes Pertussis.
Explanation:
Pertussis can also be defined as whooping cough or 100 day cough. It is respiratory disease which is highly contagious.
it is caused by the bacteria Bordetella pertussis. It is also known to be uncontrollable as this condition does not allows the person to breathe properly.
If recognized at early stage then antimicrobial like erythromycin can be used to treat it. The symptoms of this disease lasts for a long time and is not cured easily. Its initial stage includes cold, cough and running nose, same as common cold.
It converts it into electrical energy. Hope that helps :D