Answer:
278 mL x 0.038 M = 10,564 mmol.
Using the molair mass of Fe2(SO4)3 to convert mmol to grams:
10,564 mmol / 1000 x 399,88 g/mol = 4,22 g Fe2(SO4)3.
We tend to feel more responsible when fewer people are around to help out. This is because you feel the need to help since you cannot rely on many others to do it.
Answer: Responsible
Note: Answer above is incorrect!!!
He is Lord; live
The characteristics that photosynthesis and combustion share are a] They both involve chemical change. b] They are both endothermic. c] They both start with chemical energy. d] They both occur in living organisms.
Answer:
You determine the weighted averages if the individual isotopic masses.
Procedure:
The atomic mass of Si is the <em>weighted average </em>of the atomic masses of its isotopes.
We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its percent abundance).
The three stable isotopes of Si are Si-28 (27.98 u, 92.22 %), Si-29 (28.98 u, 4.69 %), and Si-30 (29.97 u, 3.09 %).
Set up a table for easy calculation.
0.9222 × 27.89 u = <em>x</em> u
0.0469 × 28.98 u = <em>y</em> u
0.0309 × 29.97 u = <em>z</em> u
TOTAL = (<em>x</em>+<em>y</em>+<em>z</em>) u = atomic mass of Si.
Answer:
Electrons
Explanation:
The particles found in the cloud surrounding the nucleus of an atom are the electrons.
These particles occupies the bulk volume of the atom.
- Electrons were first discovered by J.J Thomson from his experiment on the gas discharge tube.
- These particles carries a negative charge on them.
- They have a mass of 9.11 x 10³¹kg