Molarity is affected by temperature. Its unit is mole/litre. It measure the concentration of any solute in a solution. Thus the Molar mass is 166.4g/mol.
What is molarity?
Molarity can be calculated by dividing number of moles of solute by volume of solution in liter. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.
Mathematically,
Molarity= number of moles of solute/volume of solution in liter (1)
Where,
moles= given weight÷ molecular weight
= 5.259 g÷ molecular weight
Substituting values in equation 1
0.2535 M =(5.259 g÷ molecular weight )÷(125÷1000)
molecular weight= 166.4g/mol
Thus the Molar mass is 166.4g/mol.
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A gas composed of chlorine and oxygen has a density of 2.875 g/L at 754.5 mm Hg and 11°C. What is the most likely molecular formula of the gas?
The molecular formula of the unknown gas is ClO₂.
Let us consider that the gas composed of Chlorine and Oxygen is X. It is given that the density of the gas is 2.875g/L, the pressure of the gas is 754.5mmHg and the temperature is 11°C which is 284K.
From the kinetic theory of gases,
ρ = PRT/M
where M is the molar mass of the unknown gas X and R is the universal gas constant.
On substituting the values, we get
0.992763 = (2.875 x 0.0821 x 284)/M
M = 66.45174/0.992763
M = 67.52g/mol
Therefore, the molar mass of X is 67.52g/mol.
This molar mass value is equal to the molar mass value of ClO₂. Thus we could conclude that the molar mass of X is 67.52g/mol and the molecular formula of X is ClO₂.
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How many grams of
NaOH are required to
prepare 300. mL of a
0.350M solution?
(molar mass of NaOH =
40.0 g/mol)
4.2g of NaOH are required to prepare 300ml of a 0.350M solution.
Given,
the Molarity of the solution = M = 0.350M
molecular mass of NaOH = m = 40g
volume of solution = V = 300ml
weight of NaOH = w
According to the formula of Molarity,
M = (w×1000) /(m×V)
0.35M = (w ×1000) /(40×300)
w = (0.35×40×300) /1000
w = 4.2 g
Hence, 4.2g of NaOH are required to prepare 300ml of a 0.350M solution.
What is Molarity?The total number of moles of solute in a given solution's molarity is expressed as moles of solute per litre of solution. As opposed to mass, which fluctuates with changes in the system's physical circumstances, the volume of a solution depends on changes in the system's physical conditions, such as pressure and temperature. M, sometimes known as a molar, stands for molarity. When one gramme of solute dissolves in one litre of solution, the solution has a molarity of one. Since the solvent and solute combine to form a solution in a solution, the total volume of the solution is measured.
mathematically,
M = (w×1000) / (m×V)
where,
M = Molarity
m = mass of solute
V = volume
w = weight of the solute
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spike is not a clone of his father he inherited dna from both of his parents Chromosomes are condensed units of dna if spike has 36 chromosomes you would expect that spike would have inherited
18 Chromosomes from his mother and 18 Chromosomes from his father.
If a spike has random chromosomes we would expect it to inherit 18 chromosomes from its father and 18 from its mother. All 36 chromosomes are arranged in two sets of chromosomes. Almost every cell in the human body has the same DNA. Most of the DNA is in the cell nucleus.
Must have a dominant allele to be considered a tastant hence Tt. Parents pass on traits such as eye color and blood type to their children through genes. Some health conditions and diseases can also be inherited genetically. Traits can take many forms. Bases are the parts of DNA that store information, giving DNA the ability to encode human phenotypes' visible characteristics. Adenine and guanine are purine bases.
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A room is 3.5 m wide, 4.0 m long, and 3.0 m high. The pressure inside the room is 760. tort and th
temperature in the room is 27 °C
(a) (3 pts) What is the pressure in the room in atmospheres (atm)?
(a) The pressure in the room in atmospheres (atm) : 1 atm
What is atmospheric pressure ?Atmospheric pressure, also called atmospheric pressure, the force per unit area exerted by an atmospheric column (ie, the total mass of air over a given area). Atmospheric pressure can be measured with a mercury barometer (hence the common synonym barometric pressure), which indicates the height of a mercury column that exactly balances the weight of the air column relative to the barometer. Air pressure is also measured with an aneroid barometer
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1. A 20.00g sample of gold (molar mass = 196.97, Cp = 0.129 J/g C) at 500 Celsius is placed in a water bath of 300.00g at a temperature of 30.00 Celsius (molar mass = 18.02 g/mole, Cp= 4.18 J/g C). What is the temperature of the water after thermal equilibrium is obtained. You can assume no heat is lost in the process. No work no credit. (Show all equations used) 8 pts
The temperature of the water after thermal equilibrium is obtained is 30.97 °C
How do I determine the equilibrium temperatureFrom the question given above, the following data were obtained:
Mass of gold (M) = 20 gSpecific heat capacity of gold (C) = 0.129 J/gºC Temperature of gold (T) = 500 °CMass of water (Mᵥᵥ) = 300 gTemperature of water (Tᵥᵥ) = 30 °CSpecific heat capacity of the water = 4.18 J/gºC Equilibrium temperature (Tₑ) =?The equilibrium temperature can be obtained as illustrated below:
Heat loss = Heat gain
MC(T – Tₑ) = MᵥᵥC(Tₑ – Tᵥᵥ)
20 × 0.129 (500 – Tₑ) = 300 × 4.18(Tₑ – 30)
2.58(500 – Tₑ) = 1254(Tₑ – 30)
Clear bracket
1290 – 2.58Tₑ = 1254Tₑ – 37620
Collect like terms
1290 + 37620 = 1254Tₑ + 2.58Tₑ
38910 = 1256.58Tₑ
Divide both side by 1256.58
Tₑ = 38910 / 1256.58
Tₑ = 30.97 °C
Thus, the equilibrium temperature is 30.97 °C
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