2Na+2H2O----2NaOH+H2
Which is the formula for diarsenic pentoxide? Ar2O5 As5O2 As2O5 2As5O
2 answers:
Answer : The correct option is,
Explanation :
Diarsenic pentoxide having the formula, . It is a covalent compound which is formed by the sharing of electrons between the two non-metals. The two non-metals are arsenic (As) and oxygen (O).
When the two arsenic atoms share their electrons to the five oxygen atoms to form covalent compound.
The formula of covalent compound is given by :
- The less electronegative element is written first.
- The more electronegative element is written second.
- If the prefixes are written with the elements then the prefix number is written in the subscript of the respective elements.
Hence, the formula for diarsenic pentoxide is,
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Answer:
Explanation:
1. find the molar mass (amu) of each element and add them to get the whole molar mass.
2. divide the 1 element molar mass with the whole molar mass
3. multiple by 100 and that gives you the % composition.
<h2><u><em>56-57: NaCl</em></u></h2>1. Na(22.99amu) + Cl (35.453amu)=58.443
2(Na): = .393
2(Cl): = .607
3(Na): .393 * 100=39.3%
3(Cl): .607 * 100= 60.7%
<h2><u>58-60 </u>1. K: (39.098)(2)=78.196
_ C: (12.011)(1)= 12.011
_O: (15.99)(3) = 47.997
78.196+12.011+47.997= 138.204
2:K: = .566 <u>Step </u>3: (.566)(100)= 56.6%
2: C: = .087 <u>Step 3</u>: (.087)(100)= 8.7%
2: O: = .347 <u>Step 3</u>: (.347)(100) = 34.7%
1. Fe (55.845)(3)= 167.535
_ O (15.999)(4) = 63.996
167.535+63.996=231.531
2: Fe: = .724 Step 3: (.724)(100)= 72.4%
2: O : = .276 Step 3: (.276)(100) = 27.6%
1.
C(12.011*3)=36.033
H(1.008*5)=5.04 + (1.008*3)=3.024 so its 8.064
O(15.999*3)=47.997
add them: 92.094
2: C: = .391 Step 3: (.391)(100) = 39.1%
2: H: = .088 step 3: (.088)(100) = 8.8%
2: O: = .521 step 3: (.521)(100) = 52.1%