Answer:
67.5 moles of O2
Explanation:
2 C
8
H
18 + 27
O
2 → 16
C
O
2 + 18
H
2
O
According to the balanced chemical equation, in normal air % moles of iso-octane will require 67.5 moles of oxygen to combust completely...
The answer is Xylem. The plant structure that helps transport water and nutrients from the roots to the leaves and other parts of the plant is Xylem. In vascular plants, plants that have TUBELIKE STRUCTURES that carry water, nutrients, and other substances throughout the plant have xylem (<span>vascular tissue that carries water upward from the roots to every part of a plant) </span>and phloem (vascular tissue tubelike vessels that transport sugar made in photosynthesis from leaves to plant).
Water. Arrhenius acids provide a H+ ion and a base provides a OH- ion, which react to form water.
Answer:
Q = -3980.9 j
Explanation:
Given data:
Mass of sample = 30 g
Initial temperature = 56.7 °C
Final temperature = 25 °C
Specific heat of water = 4.186 j/g.°C
Amount of heat released = ?
Formula:
Q = m.c.ΔT
Q = heat released
m = mass of sample
c = specific heat of given sample
ΔT = change in temperature
Solution:
ΔT = T2 -T1
ΔT = 25 °C - 56.7 °C = - 31.7°C
Q = m.c.ΔT
Q = 30 g × 4.186 j/g.°C × - 31.7°C
Q = -3980.9 j
Answer:
The kinetic energy of a molecule of carbon tetrachloride is 8.29 zJ.
Explanation:
The kinetic energy of a molecule of carbon tetrachloride is given by:
Where:
m: is the mass
v: is the speed = 255 m/s
To find the mass we need to find the molar mass for CCl₄, and use the Avogadro's number, knowing that in 1 mol of carbon tetrachloride we have 6.022x10²³ molecules:
A (C) = 12.011 g/mol
A (Cl) = 35.45 g/mol
The molar mass (M) of CCl₄ is:
Now, the mass of 1 molecule of CCl₄ is:
Finally, the kinetic energy of a molecule of carbon tetrachloride is:
Therefore, the kinetic energy of a molecule of carbon tetrachloride is 8.29 zeptoJoule.
I hope it helps you!
