Answer:
Carbon has the highest mass percent
Explanation:
Step 1: Data given
Predict the element that will have the highest mass percent composition in each compound without doing any calculations.
For C3H6O, carbon will have the highest mass percent. The molar mass of of Oxygen and carbon are more or less the same. But we have 3x more Carbon than oxygen.
Identify the element that has the highest mass percent composition in C3H6O .
atomic mass C = 12.01 g/mol
atomic mass O = 16.0 g/mol
atomic mass H = 1.01 g/mol
molar mass C3H6O = 58.08 g/mol
%C = (3*12.01 / 58.08) * 100 %
%C = 62.04%
%O = (15.99 /58.08) *100%
%O = 27.53 %
%H = (6*1.01 / 58.08) * 100%
%H = 10.43
Carbon has the highest mass percent
Answer:
yo try and search it on Google
Answer:
So X has an atomic mass of 55.05 u, and is probably Mn
Explanation:
<u>Step1: </u>Balance the equation
XI2 +Cl2 → XCl2 + I2
<u>Step2:</u> find the molar mass of the compounds
<em><u>Compounds : </u></em>
X ⇒ Molar mass = M
XI2 ⇒ Molar mass = M + 2*126.9 u
XCl2 ⇒Molar mass = M + 2*35.45u
⇒For 1 mole XI2 we have 1 mole Cl2 reacting , as well as 1 mole XCl2 and 1 mole I2 produced.
<u>Step 3:</u> Calculating the atomic mass
(1.383g * XI2) / (M + 2*126.90 u) = (0.564g * XCl2) / ( M + 2 * 35.45u)
1.383 (M + 2 *35.45 u )= 0.564 (M + 2*126.90)
1.383M + 98.0547 = 0.564 M + 143.1432
1.383 M - 0.564 M =143.1432 - 98.0547
0.819 M = 45.0885
M = 55.05 u
So X has an atomic mass of 55.05 u ⇒ if we look at the periodic table we can find that the closest element is Manganese (Mn)
MnI2 + Cl2 → MnCl2 + I2
