Answer:
C. distance between two of the numbered lines
A.2SO₂ + O₂ + 2H₂O → 2H₂SO₄
B.Moles of SO₂ = 67.2 / 22.4Moles of SO₂ = 3 molesMoles of H₂SO₄ = 3 molesMass of H₂SO₄ = 3 x 98Mass of H₂SO₄ = 294 grams
Assuming sulfuric acid to have the same density as water,density = 1000 g / LVolume = mass / densityVolume = 294 / 1000Volume = 0.29 liters of sulfuric acid
Chromosomes have hereditary function
that are capable of self-duplication and they have thread-like structures seen
inside the nucleus of plant and animal. In plants, they go through a cycle
called alteration of generation that has multicellular stages. One is sporophyte
that is a diploid, and the other is gametophyte with a haploid.
<span>Moreover, spores are produce through
meiosis so it go through a process of chromosome reduction in order to create a
haploid spores. While, gametes undergo mitosis and the structure is already a haploid,
which means that the number of chromosomes will not change in order to produce
haploid. In this case, the plant have both spores and gametes and the
similarities is that, they are both singles celled and a haploid. Therefore,
the number of the chromosome in the gametophyte generation is also 32.</span>
Answer: 51.45 grams of excess reagent is left after the completion of reaction.
Explanation: For the calculation of moles, we use the formula:
....(1)
Given mass = 92 grams
Molar mass = 28g/mol
Putting values in equation 1, we get:
- For
Given mass = 112 grams
Molar mass = 116g/mol
Putting values in equation 1, we get:
The reaction follows:
By Stoichiometry,
2 moles of reacts with 3 moles of silicon
So, 0.965 moles of reacts with = 
= 1.4475 moles of Silicon.
As, the moles of silicon is more than the required amount and is present in excess.
So, the excess reagent for the reaction is Silicon.
Moles of silicon remained after reaction = 3.285 - 1.4475 = 1.8375 moles
To calculate the amount of Silicon left in excess is calculated by using equation 1:
Amount of Silicon in excess will be 51.45 grams.
The hazard from thalidomide is that it can cause children to die or to be born with deformed limbs, often without limbs. That's why its use has been greatly reduced and is now only usable in treating certain types of cancers or leprosy.
