Answer:
B. CH₅N
Explanation:
The combustion reaction of a compound CₐHₓNₙ with O₂ is:
CₐHₓNₙ + O₂ → a CO₂ + X/2 H₂O + n NO₂
Where 1 mole of CₐHₓNₙ with an excess of O₂ produce a moles of CO₂, X/2 moles of H₂O and n moles of NO₂
Thus, you need to convert the mass of CO₂ and H₂O to moles to find the C:H ratio and determine a possible empirical formula thus:
Moles CO₂ (Molar mass 44g/mol):
44g ₓ (1mol / 44g) = 1 mole CO₂ = 1 mole C
Mole of H₂O (Molar mass 18g/mol):
45g ₓ (1 mol / 18g) = 2.5 moles H₂O = 5 moles H
Thus, in the compound you have 5 moles of H per mole of C, and a possible empirical formula is:
B. CH₅N
The only structure that meet this C:H ratio
1. Dressmaking is the craft of sewing clothes and dresses .
2. Tailoring is the art of professionally designing , cutting , fitting , and finishing clothing .
3. The tools and equipment in dressmaking / tailoring are scissors , measuring tape , needles , pins , pincushions , iron and water sprayer , threader , threads , ruler , sewing machine .
There are many road signs or cop car blocking or even construction workers or vehicles
Answer: Xylem carries water from the roots to the leaves.
Explanation:
The above option is a missing option to your question and the correct one.
The Xylem is a kind of vascular tissue that plants have which helps in the transportation of water. It gets water from the roots and transports it to the leaves. It also transports dissolved minerals in the water to those leaves as well.
Phloem tissue transports food from the leaves where it is made to the roots.
I think you could choose either fire or ice.
fire = desire.
Selfishly wanting what you should not have is selfish desire. It is ruinous to think only of yourself. That's fire in this case.
hate is also very destructive. (I personally think that hate is the most dangerous of all possible character traits.) Hatred has emotional roots that cannot be easily overcome and certainly is not controlled by a tender heart. Intellect can be very guilty of hatred. That is why it is termed ice. Hatred can be quite cold governed by intellect.
