Based on the crystal-field strengths cl- < f- < h2o < nh3 < h2nc2h4nh2, which octahedral ti (iii) complex below has
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The volume of sphere can be calculated using the following formula:
Here, r is radius of the sphere which is 3.5 cm. Putting the value,
This is equal to the volume of lead, density of lead is thus, mass of lead can be calculated as follows:
m=d×V
Putting the values,
Let the mass of ore be 1 g, 68.6% of galena is obtained by mass, thus, mass of galena obtained will be 0.686 g.
Now, 86.6% of lead is obtained from this gram of galena, thus, mass of lead will be:
m=0.686×0.866=0.5940 g
Therefore, 0.5940 g of lead is obtained from 1 g of ore for 100% efficiency, thus, for 92.5% efficiency
1 g of lead obtain from grams of ore.
Thus, 2041.2 g of lead obtain from:
Therefore, mass of ore required to make lead sphere is 3.715 kg.
Answer:
The empirical formula is =
The formula of Valproic acid =
Explanation:
Mass of water obtained = 0.166 g
Molar mass of water = 18 g/mol
Moles of = 0.166 g /18 g/mol = 0.00922 moles
2 moles of hydrogen atoms are present in 1 mole of water. So,
<u>Moles of H = 2 x 0.00922 = 0.01844 moles </u>
Molar mass of H atom = 1.008 g/mol
<u>Mass of H in molecule = 0.01844 x 1.008 = 0.018588 g </u>
Mass of carbon dioxide obtained = 0.403 g
Molar mass of carbon dioxide = 44.01 g/mol
Moles of = 0.403 g /44.01 g/mol = 0.009157 moles
1 mole of carbon atoms are present in 1 mole of carbon dioxide. So,
<u>Moles of C = 0.009157 moles </u>
Molar mass of C atom = 12.0107 g/mol
<u>Mass of C in molecule = 0.009157 x 12.0107 = 0.11 g </u>
<u>Given that the Valproic acid only contains hydrogen, oxygen and carbon. </u>So,
Mass of O in the sample = Total mass - Mass of C - Mass of H
Mass of the sample = 0.165 g
<u>Mass of O in sample = 0.165 - 0.11 - 0.018588 = 0.036412 g </u>
Molar mass of O = 15.999 g/mol
<u>Moles of O = 0.036412 / 15.999 = 0.002276 moles</u>
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<u>Taking the simplest ratio for H, O and C as: </u>
<u>0.01844 : 0.002276 : 0.009157</u>
<u> = 8 : 1 : 4</u>
The empirical formula is =
Molecular formulas is the actual number of atoms of each element in the compound while empirical formulas is the simplest or reduced ratio of the elements in the compound.
Thus,
Molecular mass = n × Empirical mass
Where, n is any positive number from 1, 2, 3...
Mass from the Empirical formula = 4×12 + 8×1 + 16= 72 g/mol
Molar mass = 144 g/mol
So,
Molecular mass = n × Empirical mass
144 = n × 72
<u>⇒ n = 2</u>
The formula of Valproic acid =
Answer:
The answer to the question is
The star’s approximate radial velocity is 68.52 km/s
Explanation:
To solve the
The formula is
where
= velocity of the star
λ = Star's spectrum wavelength = 656.45 nm
= Rest wavelength = 656.30 nm
c = Speed of light = 299 792 458 m / s
Therefore we have
or
= 68518.7699 m/s or 68.52 km/s