<span>iron gets hotter before copper.</span>
First let us calculate for the molar mass of ibuprofen:
Molar mass = 13 * 12 g/mol + 18 * 1 g/mol + 2 * 16 g/mol
Molar mass = 206 g/mol = 206 mg / mmol
Calculating for the number of moles:
moles = 200 mg / (206 mg / mmol)
moles = 0.971 mmol = 9.71 x 10^-4 moles
Using the Avogadros number, we calculate the number of
molecules of ibuprofen:
Molecules = 9.71 x 10^-4 moles * (6.022 x 10^23 molecules
/ moles)
<span>Molecules = 5.85 x 10^20 molecules</span>
Answer: Doctors can diagnose the disease through physical findings such as a "bull's-eye" rash along with a history of symptoms. But not everyone has the rash, and not everyone can recall being bitten. Special blood tests can be taken three to four weeks after suspected contact to confirm the diagnosis.
Explanation: HOPE THIS HELPS HAVE A GOOD DAY!;)
Hi!
Magnets attract with opposite poles. The reason is the North pole of a magnet's magnetic lines (if that makes any sense) generally flow inwards, making it pulling in, and the South pole's magnetic lines flow outwards, pushing out. If you align two magnets with the same poles together, they will always repel, because they will be flowing in different directions.
However, if you align a north and a south pole together, they will work together, and attract.
Therefore, if you place two magnets randomly, and they're close enough, they'll align so that the north pole of one magnet faces the south pole of the other magnet, or choice A.
<h3>Answer:</h3>
When a disulfide linkage is formed, the compound containing this new linkage has been <u>oxidized</u>.
<h3>Explanation:</h3>
Oxidation reaction is defined as,
i) Addition of Oxygen Atoms:
When oxygen atom is added to any compound, then the compound is said to be oxidized and the reaction is known as oxidation reaction.
Example:
Oxidation of Alcohols into carboxylic acids:
R---CH₂--OH → R---COOH
ii) Removal of Hydrogen Atoms:
When hydrogen atom(s) are removed from any compound, then the compound is said to be oxidized and the reaction is also called as oxidation reaction.
Example:
Formation of disulfide bond fro thiols:
R--S-H + R--S-H → R---S--S---R
Disulfide bond is quite popular in protein chemistry where it is formed in cystine from cystein amino acids.
