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You can calculate the molecular mass using freezing point depression or boiling point elevation using the formula: mols solute= change in BP (or FP) x kg solvent / Kb (or Kf) /i
Where Kb and Kf are constants and i is number of ions (or 1 if covalent)
Then take mols solute (calculated) and divide into grams solute (recorded)
What else can I help you with?
How is the number of moles of en element determined from known mass?
The number of moles of an element can be determined using the formula: moles = mass (grams) / molar mass (grams per mole). First, you need to find the molar mass of the element from the periodic table. Then, divide the known mass of the element by its molar mass to calculate the number of moles. This allows you to convert the mass into an amount expressed in moles.
What is an isotope and how is it determined?
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. They are determined based on their atomic mass, which is the sum of protons and neutrons in the nucleus. Isotopes of an element have similar chemical properties but may have different physical properties, such as radioactive decay rates.
Physical properties such as size and magnetism can be used to?
identify and characterize substances in chemistry. Size can be determined using techniques like microscopy, while magnetism can be tested using a magnet to see if a material is attracted or repelled. These properties help scientists understand the composition and behavior of substances.
What are the basic mixing rule?
The basic mixing rule states that the partial molar properties of a mixture can be calculated as the weighted sum of the pure components' properties, using the mole fractions of each component. This rule applies to extensive properties like volume, Gibbs free energy, and entropy. It forms the basis for understanding mixing behavior in solutions and mixtures.
How is the mass compound determined from the number of moles?
Multiply the number of moles times the molar mass of the compound. Moles cancel and you are left with mass in grams.For example: What is the mass of 2.47 moles of sodium chloride, NaCl?Known: The molar mass of NaCl is 58.44g/mol. (Using atomic weights in grams from the periodic table.)Solution:2.47mol NaCl x 58.44g/mol NaCl = 144g NaCl
How can the molar mass of a solute be determined using freezing point depression?
The molar mass of a solute can be determined using freezing point depression by measuring the change in freezing point of a solvent when the solute is added. By using the formula Tf Kf m, where Tf is the change in freezing point, Kf is the cryoscopic constant of the solvent, and m is the molality of the solution, the molar mass of the solute can be calculated.
How is the number of moles of en element determined from known mass?
The number of moles of an element can be determined using the formula: moles = mass (grams) / molar mass (grams per mole). First, you need to find the molar mass of the element from the periodic table. Then, divide the known mass of the element by its molar mass to calculate the number of moles. This allows you to convert the mass into an amount expressed in moles.
How do you calculate molar enthalpy change when tungsten is heated by 15 K?
The molar enthalpy change for heating a substance can be calculated using the formula: ΔH = nCΔT, where n is the number of moles, C is the molar heat capacity, and ΔT is the temperature change. Without specific values for n and C, the molar enthalpy change cannot be determined.
How many grams of KOH and 4 g of H2?
To determine the number of grams of KOH, we first need to know the molar ratio between KOH and H2 in the balanced chemical equation. Once the molar ratio is determined, we can calculate the amount of KOH using stoichiometry. Without the molar ratio, we cannot determine the exact amount of KOH with just the information provided.
What is an isotope and how is it determined?
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. They are determined based on their atomic mass, which is the sum of protons and neutrons in the nucleus. Isotopes of an element have similar chemical properties but may have different physical properties, such as radioactive decay rates.
Molar Mass Of Magnesium from gas law stoichiometry where would this apply?
The molar mass of magnesium can be determined using gas law stoichiometry when the mass of magnesium reacted and the volume of gas produced are known. By measuring the volume of gas produced during the reaction of magnesium with an acid, and knowing the pressure, temperature, and number of moles of gas, the molar mass of magnesium can be calculated using the ideal gas law equation PV = nRT and stoichiometry relationships.
Physical properties such as size and magnetism can be used to?
identify and characterize substances in chemistry. Size can be determined using techniques like microscopy, while magnetism can be tested using a magnet to see if a material is attracted or repelled. These properties help scientists understand the composition and behavior of substances.
A sentence using the word determined?
I am determined not to answer your question.
Molar mass by freezing point depression chemistry lab?
In a molar mass by freezing point depression lab, a known quantity of solute is added to a solvent, resulting in a lowered freezing point. By measuring the change in freezing point and knowing the constant for the solvent, the molar mass of the solute can be determined using the formula: ΔTf = Kf * m, where ΔTf is the freezing point depression, Kf is the cryoscopic constant, and m is the molality of the solution.
What are the basic mixing rule?
The basic mixing rule states that the partial molar properties of a mixture can be calculated as the weighted sum of the pure components' properties, using the mole fractions of each component. This rule applies to extensive properties like volume, Gibbs free energy, and entropy. It forms the basis for understanding mixing behavior in solutions and mixtures.
How do you calculate the molar volume of a substance?
To calculate the molar volume of a substance, you divide the volume of the substance by the number of moles present. This can be done using the formula: Molar Volume Volume / Number of Moles.
What is the molar mass of acetic acid by elevation of boiling point method?
The molar mass of acetic acid can be determined using the elevation of boiling point method by measuring the change in boiling point of a solution of acetic acid relative to the boiling point of the pure solvent. By applying the equation ΔT = K_b * m, where ΔT is the change in boiling point, K_b is the ebullioscopic constant of the solvent, and m is the molality of the solution, the molar mass of acetic acid can be calculated using the formula MM = (RT2) / (K_b * ΔT), where MM is the molar mass of acetic acid, R is the gas constant, and T is the temperature in Kelvin.
