Answer:
400 K
Explanation:
Please see the step-by-step solution in the picture attached below.
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Which compound has the highest melting point? Picture has the options
1 answer:
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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%
5.75g
Explanation:
Given parameters:
Number of atoms = 1.505 x 10²³atoms
let us find the number of moles and mass of this atom.
Solution:
The mole is convenient unit for reporting measurements in chemistry. It allows us to make mathematical calculations:
one mole of substance contains 6.02 x 10²³atoms
Number of moles of Na given = = 0.25moles
Mass of Na atom given = number of moles x molar mass
Molar mass of Na= 23g/mole
Mass of Na = 0.25 x 23 = 5.75g
learn more:
Number of moles brainly.com/question/1841136
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