Questions Answered

ecuaezzy101:
Group Title
If iron ore is Fe2O3
a. Find its formula mass.
b. Calculate the percent by mass of the ore that is iron.
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 updated 2 years ago
 2 replies
 2 Medals

ecuaezzy101:
Group Title
Given the nuclear equation:
235 1 142 91 1
…
 updated 2 years ago
 6 replies
 1 Medal

ecuaezzy101:
Group Title
The halflife of a radioactive isotope is 20.0 minutes. What is the total amount of a 1.00gram sample of this sample of this isotope remain…
 updated 2 years ago
 3 replies
 3 Medals

ecuaezzy101:
Group Title
In the equation 234Th90 > 234Pa91 + X, which particle is represented by X?
 updated 2 years ago
 5 replies
 3 Medals

ecuaezzy101:
Group Title
A student determined the heat of fusion of water to be 88 calories per gram if the accepted value is 80 calories per gram, what is the stude…
 updated 2 years ago
 3 replies
 1 Medal

ecuaezzy101:
Group Title
Which measurement contains three significant figures?
a. 0.08cm
b. 0.080cm
…
 updated 2 years ago
 3 replies
 2 Medals

ecuaezzy101:
Group Title
What is the sum of 0.04321g + 5.263g + 2.13g to the correct number of significant digits?
 updated 2 years ago
 3 replies
 1 Medal

ecuaezzy101:
Group Title
Which measurement has the greatest number of significant figures?
6.060 mg
…
 updated 2 years ago
 2 replies
 3 Medals

ecuaezzy101:
Group Title
Which is an example of a binary compound?
a. acetic compound
b. nitric compound
…
 updated 2 years ago
 3 replies
 2 Medals