<span>Solving for the percent composition by mass of sulfur. The formula would be:
%S = mass of sulfur / mass of compound x 100%
Plugging in our data:
%S = 32 amu / 120 amu x 100%
%S = 0.266666 x 100%
%S = 26.66%
Rounded off to two significant numbers it will be 27%. Therefore the answer is number 2.</span>
For Single Element Ions (e.g. K+ , Mg2+, P3-) To name positive (+) ions write the name as from the Periodic Table and add the word 'ion' afterwards. To name negative (-) ions write the name from the Periodic Table but replace the ending with 'ide'. Put the word 'ion' after the name.
It is possible to turn aldehydes and ketones into alkenes via the Wittig reaction.
<h3><u>What is wittig reaction ?</u></h3>
- The Wittig Reaction: It is possible to turn aldehydes and ketones into alkenes via the Wittig reaction, which is a practical process.
- Georg Wittig, its creator, received the 1979 Nobel Prize in Chemistry for it (along with the father of hydroboration, H.C. Brown).
- A carbonyl molecule (aldehydes and ketones both function, but esters or amides do not) and a fairly peculiar-looking species known as a ylide are the two ingredients in this reaction. (more precisely, a "phosphonium ylide," as there are also ylides of nitrogen and sulfur).
- An ylide is a species having opposing formal charges on nearby atoms, according to technical definition. The ylide, which we shown above with a double bond between carbon and phosphorus, also has a significant resonance form with a positive charge on phosphorus and a negative charge on carbon.
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Atomic mass Ca = 40 a.m.u
1 mole Ca ----------- 40 g
2.5 mols Ca -------- ( mass Ca )
Mass Ca = 2.5 x 40 / 1
Mass Ca = 100 / 1
= 100 g of Ca
hope this helps!
answer should be 1.4 cm³
1 L = 10 and so
dL = 100 and then
cL = 1,000
mL = 0.001 m³
1 m³ = 1,000
dm³ = 1,000,000
cm³ = 1,000,000,000
mm³ = 1,000 L
So, 1 mL = 1 cm³ = 0.001 L = 0.1 cL
1,400 mL = 1,400 cm³ = 1.4 L = 140 cL