Answer:
C. I
Explanation:
The elements are categorized in groups and periods. The periods are horizontal and the groups are vertical. The elements in the same group (vertical) have very similar characteristics.
Inert means that the substance did not have a tendency to react at all, while stable means that the substance has reached a chemical state in which it is not likely to react. Stability is easier to overcome than inertness.
Answer:
B) Ethanol must act as a competitive inhibitor for the alcohol dehydrogenase and therefore slows the formation of formaldehyde.
Explanation:
An<em> inhibitor</em> is a substance that binds to an enzime and prevents it to react with a substrate. In this case, the inhibitor is ethanol, binding to the enzime (alcohol dehydrogenase) <u>and preventing it to react with methanol and thus from it form the toxic formaldehyde</u>.
A competitive inhibitor has a similar structure to the substrate, that is why it binds to the same active site. In this case, ethanol has a similar structure to methanol, which is why the answer is B and not A.
Given, mass of isotope 1 = 39.06 amu
% abundance of isotope 1 = 10.00%
mass of isotope 2 = 42.14 amu
% abundance of isotope 2 = 90.00%
Average atomic mass
= [ (mass of isotope 1 x % abundance of isotope 1 ) + (mass of isotope 2 x % abundance of isotope 2 ) ]/ 100
= [(39.06 x 10) + (42.14 x 90)]/100
= (390.6 + 3792.6) / 100
= 4183.2/100
= 41.8 (to the nearest tenth)
Therefore, the weighted atomic mass of element Q is 41.8 amu.
<h3>
Answer:</h3>
895.11 g Titanium
<h3>
Explanation:</h3>
- The relationship between the mass of an element, moles and the atomic mass is given by the formula;
Number of moles, n = Mass, m ÷ relative atomic mass
That is,
n = m ÷ R.A.M.
Therefore, to get the mass we would use, m = n × R.A.M.
In this case,
Number of moles, n = 18.7 moles
R.A.M of titanium = 47.867
Therefore,
Mass of titanium, m = 18.7 moles × 47.867
= 895.11 g
Therefore, 18.7 moles of titanium contains 895.11 g
