Alexander Fleming and penicillin is used to help fight gram positive bacteria and other bacterial infections
Answer:
In the 1H NMR spectrum of ethanol three different signals are observed, this is due to the existence of 3 types of hydrogens with different chemical environment. Hydrogens A (3.57 ppm) are more screened than C (1.10 ppm) due to the presence of oxygen (electonegative atom that removes electron density). The chemical environment of hydrogen B (4.78 ppm), attached directly to oxygen, is also different by resonating at a frequency different from the previous ones.
The hydroxylic hydrogen produces a singlet, the pair of carbon hydrogens one give rise to a quadruplet and the three hydrogens of carbon two produce a triplet.
Explanation:
Answer:
The answer to your question is: 45 electrons
Explanation:
Isotopes are molecules that have the same number of protons but the number of neutrons is different.
Also, in a neutral atom, the number of protons and electrons is the same.
In the example given, we can see that the atom is neutral so, the number of protons = 45 and the number of electrons = 45.
Answer:It is always greater than the actual mechanical advantage because all machines must overcome friction. The mechanical advantage of a machine may be greater than, less than, or equal to 1, depending on the type of machine.
Answer:
The answer would be true
Explanation:
Elements 1 through 92 (except for elements 43 and 61) occur naturally on Earth, although some are only present in extremely small quantities.
