Answer:
607 ppm
Explanation:
In this case we can start with the <u>ppm formula</u>:
If we have a solution of <u>0.0320 M</u>, we can say that in 1 L we have 0.032 mol of , because the molarity formula is:
In other words:
If we use the <u>atomic mass</u> of (19 g/mol) we can convert from mol to g:
Now we can <u>convert from g to mg</u> (1 g= 1000 mg), so:
Finally we can <u>divide by 1 L</u> to find the ppm:
<u>We will have a concentration of 607 ppm.</u>
I hope it helps!
Answer:
A) 2.2 mol
Explanation:
Given data:
Number of moles of O₂ produced = ?
Number of moles of N₂O₅ decomposed = 4.3 mol
Solution:
Chemical equation:
2N₂O₅ → 4NO₂ + O₂
Now we will compare the moles of N₂O₅ and O₂.
N₂O₅ : O₂
2 : 1
4.3 : 1/2×4.3 = ×2.2
Thus, from 4.3 moles of N₂O₅ 2.2 moles of O₂ are produced.
Answer:
The sample tube holds 3.0 cc which is equal to 0.0030 Liters.
Explanation:
Volume of the blood sample in the sample tube = 3.0 cc
cc = cubic centimeter ; A unit to measure a volume
1 cubic centimeter is equal to 0.001 Liters of volume.
So in 3.0 cubic centimeter there will be:
The sample tube holds 3.0 cc which is equal to 0.0030 Liters.
Answer:
- <u>Ten (10) molecules of water</u><em> are bonded to sodium sulfate decahydrate.</em>
Explanation:
A hydrated compound is one that contains water molecules chemically bonded. So, the correct question is how many waters are <u><em>bonded</em></u> to sodium suilfate?
The latin prefix<em> deca</em> means ten (10), and the word <em>hydrate </em>means that contains water; then, <em>decahydrate</em> is used in chemistry to designate a compound that is bonded to 10 parts (molecules) of water.
Hence, sodium sulfate decahydrate means that each molecule of the compound is bonded to 10 molecules of water.
In the chemical formula, the water molecules of a hydrated compound are shown after the chemical formula of the compound using a period and a coefficient (the number of water molecules bonded) before the water molecules.
Then, given that the chemical formula for sodium sulfate is Na₂SO₄, the chemical formula for sodium sulfate decahydrate is Na₂SO₄·10H₂O.