Answer: Yes, it does incriminate both Bill and Lucy. Both had DNA found at the scene which makes them both suspects until further investigations are conducted.
Explanation: The term "at face value" means without further investigation so it is just saying looking at what has been seen are Bill and Lucy suspects. This shows that they are because both have DNA found at the scene even though they may not have been the murderer they are being investigated.
Solid Silicon can be reacted with Nitrogen gas at a high temperature to form silicon nitride (Si3N4).
1.20 moles of Silicon are added to 1.00 moles of Nitrogen gas.
(5 Points) Balance the equation and indicate the phases.
Si (___) + N2 (___) → Si3N4 (___)
(5 Points) What is the limiting reactant? You must show your work.
<span>We know the relation between heat and temperature follows the formula:
Q = Ce * m * (Tf-Ti) , where Q is heat transfer, Ce is specific heat, m is mass, Tf is final temperature and Ti is initial temperature.
Note that heat value is given in kj so we need to change to joules, then as heat is absorbed the final temperature will increase.
4,689 = 0.385 * 34.2 * (Tf-24)
Tf = 4,689 / (0.385 * 34.2) + 24 =380.12ÂşC</span>
N(number of moles)=mass/molar mass
10.5=mass
Na=23 (rounded)
Cl=36 (rounded)
Add it together to get the molar mass
=59
Then refer back to the formula
10.5/59
=0.17796
Round that answer
=0.18 mol
Answer is: B) titration.
Equivalence point is the point in which there is stoichiometrically equivalent amounts of acid and base.
Chemist can draw pH curve (graph showing the change in pH of a solution, which is being titrated) for titration and determine equivalence point.
The midpoint of a steep vertical section indicates the equivalence point