Explanation:
A chemical reaction is defined as the reaction in which bonds between the reactants either break or form which leads to the formation of a new substance.
For example, 
So, when we drop a sodium metal into water then it produces a frizzing sound which shows the metal is reacting with water.
We know that when two aqueous solutions chemically react with each other then it may lead to the formation of an insoluble substance which is known as precipitate.
This means that formation of a precipitate is also a chemical reaction.
Thus, we can conclude that following are the statements which show evidence for a chemical reaction.
- Dropping sodium metal into water produces fizzing.
- Mixing two aqueous solutions produces a precipitate.
Answer:
31.78 grams
25.55%
Explanation:
The balanced reaction for ammonium chloride with calcium oxide will be:
2NH4Cl + Ca(OH)2 ---> CaCl2 + 2NH3 + 2H2O
The molecular weight for ammonium chloride(NH4Cl ) is 53.49g/mol, while the molecular weight for ammonium(NH3) is 17g/mol. The number of theoretical yield of ammonia from 100g of ammonium chloride will be:
100g / (53.49g/mol) * 2/2 * 17g/mol= 31.78 grams
If the actual yield is 8.12g, the percent yield will be: 8.12g/31.78g * 100% =25.55%
An electron i hope this helps
Answer:
Haploid - 13
Triploid - 39
Tetraploid - 52
Trisomic - 27
Monosomic - 25
Explanation:
A haploid organism has half the chromosome number of a diploid version, hence 26/2 = 13
A triploid organism has 3 sets of a haploid chromosomes, hence 13 x 3 = 39
A tetraploid is double of a diploid, 26 x 2 = 52
Trisomic organisms have one extra chromosome in addition to the normal diploid. Hence 26 + 1 = 27
Monosomic organism has one less chromosome than the normal diploid. Hence 26 - 1 = 25
