Iodine dissolves easily in chloroform and hexane but does not dissolve in water. When polar and non-polar are mixed, water finds other water and forms spherical bubbles. When mixed with hexane, the iodine molecules experience London dispersion forces. There is no induced polarity in the iodine molecules and they exhibit their typical violet color in the solution. (Note: The color may be pink if the iodine concentration is low.) Hope this helps!!
Answer:
electrons
Explanation:
The orbitals are the spaces around the nucleus.
Neutrons and protons are in the nucleus of an atom, and the electrons revolve around the nucleus.
<span>3400 years.
The first thing to do is determine how many half lives the sample has undergone. Assuming that the level of atmospheric carbon 14 has remained consistent over time, the sample has only 2/3rd of the level of activity, so only has 2/3rds of the carbon-14 level. So calculate the logarithm to base 2 of 2/3.
log(2/3)/log(2) = -0.17609/0.30103 = -0.58496
This indicates that 0.58496 half lives have expired which is a reasonable number since if 1 half-life had been spent, the level of activity would be half of modern activity. So just multiply the number of half-lives by the half-life. So
-0.58496 * 5730 = -3351.835129
Rounding to 2 significant figures gives an estimated age of 3400 years.</span>
Photosystems are the protein molecules that are optimized to harvest light. There are two types of photosystems: photosystem I (PSI) and photosystem II (PSII).
PSI is called P700 and PSII is called P680. It is called P700 because it absorbs the light at around 700 nm wavelength. P680 because it absorbs the light at around 680 nm wavelength.
In non-cyclic photophosphorylation, the photons of light is first transferred to P680, boosting an electron to a high energy level. The high-energy electron is passed to an acceptor molecule and replaced with an electron from water. This splitting of water releases the O2 we breathe.
In cyclic photophosphorylation, the light of wavelength 700 nm is absorbed by P700 and the electrons are the passes to the acceptor molecule by several carriers.
Answer:
98.4 kPa
Explanation:
Step 1: Given and required data
- Partial pressure of water vapor at 60°C (pH₂O): 19.9 kPa (this info is tabulated)
- Partial pressure of nitrogen (pN₂): 53.0 kPa
- Partial pressure of helium (pHe): 25.5 kPa
Step 2: Calculate the total pressure of the gaseous mixture
The total pressure of the gaseous mixture (P) os equal to the sum of the partial pressures of the gases that form it.
P = pH₂O + pN₂ + pHe
P = 19.9 kPa + 53.0 kPa + 25.5 kPa = 98.4 kPa