Answer:
357.475
Explanation:
First you need periodic table and you have to look for mass
Fe = 3 x 55.845 = 167.535
P = 2 x 30.97 = 61.94
o = 4 x 2 so 8 oxygen = 8 x 16 = 128
add all and you get 357.475
Answer:
if im right i do my caculation that it is B
To get a result with the best degree of precision, the
number of significant figures should be equal to the smallest number of
significant figures of the given numbers. In this case, the smallest is 3 as
given by the number 9.03 mL.
Therefore density is:
<span>11.50 g / 9.03 mL = 1.27 g/mL</span>
(See full question in attachment)
Answer:
A. MeONa
Explanation:
One of the methods to prepare alkenes are eliminations.
The E2 reaction (for elimination, bimolecular) occurs when an alkyl halide is treated with a strong base, such as hydroxide ion or alkoxide ion (RO⁻).
It is the most common mechanism that occurs for an elimination.
The methoxide ion is a strong base that will attack the neighboring hydrogen of the halide ion and will start removing H⁺ at the same time that the double bond of the alkene begins to form and the group X begins to leave.
Then, the neutral alkene is produced when the C – H link and X group has left with the electron pair of the bond C – X (mechanism in attachment).
Therefore, MeONa would be an appropiate reagent.