The hormone thyroxine is secreted by the thyroid gland and has the formula: C15H17NO4I4. How many milligrams of Iodine can be extracted from 15.0 grams of thryoxine?
Answers
Answer : The mass of iodine extracted can be 9796.7 mg
Explanation : Given,
Mass of thryoxine = 15.0 g
Molar mass of thryoxine = 776.86 g/mole
The molecular formula of thryoxine is,
In compound, there are 15 moles of carbon, 11 moles of hydrogen, 1 mole of nitrogen, 4 moles of oxygen and 4 moles of iodine.
First we have to determine the moles of thryoxine.
Now we have to determine the moles of iodine.
As, 1 mole of thryoxine has 4 moles of iodine
So, 0.0193 mole of thryoxine has moles of iodine
Now we have to determine the mass of iodine.
conversion used : (1 g = 1000 mg)
Therefore, the mass of iodine extracted can be 9796.7 mg
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Can someone help me find the 5 digits numbers in here?
Answers
if your serious about this question then it is 5
b. Ionic solids have higher melting points than molecular solids.
c. Molecular solids have higher melting points than all other types of solids.
d. It is impossible for solids to melt; therefore solids do not have melting points.
Answers
B. Ionic solids have higher melting points than molecular solids.
Answers
Answer:
The pressure inside the wine bottle at 21 °C is 4.8 · 10² atm
Explanation:
Hi there!
We know that 1 mol of CO₂ is produced per mol of produced ethanol.
If the final concentration of ethanol is 13%, let´s calculate how many moles of ethanol are present at that concentration.
A concentration of 13% means that in 100 ml of solution, 13 ml is dissolved ethanol. We have 754 ml of solution, then, the volume of ethanol will be:
754 ml solution · (13 ml ethanol/100 ml solution) = 98 ml ethanol
With the density, we can calculate the mass of ethanol present:
density = mass/ volume
0.79 g/ml = mass / 98 ml
mass = 0.79 g/ml · 98 ml
mass = 77 g
The molar mass of ethanol is 46.07 g/mol, then 77 g of ethanol is equal to:
77 g · (1 mol/46.07 g) = 1.7 mol
Then, the number of moles of CO₂ produced will be 1.7 mol.
Using the equation of the ideal gas law, we can calculate the pressure of CO₂:
P = nRT/V
Where:
P = pressure
n = number of moles
R = ideal gas constant
T = temperature
V = volume
The volume will be the headspace of the bottle (840 ml - 754 ml) 86 ml = 0.086 l.
The temperature in kelvin will be: 21 + 273 = 294 K
The gas constant is 0.082 l atm / K mol
Then:
P = (1.7 mol · 0.082 l atm/K mol · 294 K)/ 0.086 l
P = 4.8 · 10² atm
The pressure inside the wine bottle at 21 °C is 4.8 · 10² atm
Answers
Answer:
B. Lithium (Li)
Explanation:
Lithium forms an ionic compound with nitrogen with the general formula X₃N. When lithium and nitrogen react, they form a nitride called lithium nitride.
The Lithium nitride is actually prepared by the direct combination of elemental lithium with nitrogen gas. Below is the reaction equation:
6Li + N₂ → 2Li₃N
The reaction can occur when a solution of lithium in liquid sodium metal is treated with N₂. When the Lithium nitride reacts with water, it does that violently and produces ammonia.
B) Carbon dioxide
C) water
Answers
↓ ↓
1 mole 1 mole
molar mass :
CaCO₃ = 100.0 g/mol CaCl₂ = 111 g/mol
100 g CaCO₃ ------------- 111 g caCl₂
3.00 g CaCO₃ --------------- ?
3.00 * 111 / 100 =
333 / 100 = 3.33 g of CaCl₂
________________________________________
b) molar mass CO₂ = 44.0 g/mol
100 g CaCO₃ ---------- 44.0 g CO₂
3.00 g CaCO3 ------------- ?
3.00 * 44 / 100 =
132 / 100 = 1.32 g of CO2
____________________________________
c) molar mass H₂O = 18.0 /mol
100 g CaCO3 ------- 18.0 g
3.00 g CaCO3 ------- ?
3.00 * 18.0 / 100 =
54 / 100 = 0.54 g of H₂O
___________________________________
hope this helps!
Answers
Answer:
This question is incomplete
Explanation:
A solution is an homogeneous mixture of two or more substances. These substances could be in the same form (as in solid, liquid or gas) or in different forms. Examples of solution in the same phases are
- Air (all gases): oxygen, nitrogen, carbon dioxide and noble gases
- Dilute acid solution (all liquid): water and acid
- NPK fertilizer (all solid): powdered nitrogen,phosphorus and potassium
Examples of solution in different phases are
- Salt solution: common salt (solid) and water (liquid)
- Oxygen in water: oxygen (gas) dissolved in water (liquid) which enables survival of aquatic animals
- Soot floating: soot (solid) and air (gas)
NOTE: Homogeneous mixture is a mixture whose constituents are evenly distributed in the mixture
A solution has a number of unique characteristics. First of all, it has a consistent composition throughout, which denotes that the solute is dispersed uniformly throughout the solvent to produce a homogenous mixture.
Second, the solution is transparent and not turbid because the solute particles do not scatter light. Thirdly, a solution doesn't have discrete layers since the solute has completely dissolved in the solvent. Furthermore, the presence of the solute particles causes the boiling point of the solution to normally be higher than that of the pure solvent. However, because the volume change during dissolution is typically minimal, the density of the solution stays almost the same as that of the pure solvent.
To know more about homogenous mixture, here
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--The complete Question is, A solution has what of the properties?--