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You may have noticed that % composition vs Melting Point graphs are given in % Mole...
Please answer ALL questions, not just 1. Specifically in need for 3-8. 1. Determine the formula...
Please answer ALL questions, not just 1. Specifically in need for 3-8. 1. Determine the formula weight for each compound: sulfur tetrafluoride, carbon dioxide, sodium chloride, phosphorus pentafluoride, calcium phosphate, water, propane (C3H8), iron(III) sulfate. Which compounds would also have a molecular weight or molar mass? What is the difference between a formula weight and a molecular weight? 2. Determine the percent composition for each compound in question 1. Is it possible for two compounds to have the same percent...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
3. The composition of a volume of 1 liter of dry air is given in the...
3. The composition of a volume of 1 liter of dry air is given in the table below. Calculate (6 Points) Component Nitrogen Oxygen Carbon dioxide Hydrogen Monatomic gases(Ar, Rn, He, Kr.Ne) Total Vol (ml) Mass (mg) Molecular weight (g/gmol) 780.3 893.4 209.9 274.5 0.592 28.015 32.00 44.003 2.016 39.94 0.3 0. 5.8 x 106 9.4 15.39 1000 ,183.882 a. the mass fraction of Nitrogen in Air b. the molecular weight of air in (g/gmole) c. the density of hydrogen...
What is the relationship between the moles of solute and the mass of solute? Rewrite the molality expression in terms o...
What is the relationship between the moles of solute and the
mass of solute?
Rewrite the molality expression in terms of grams and molecular
weight.
Background:
Properties that depend on the concentration of particles in solution are called colligative properties. The number of particles in a solvent can affect the freezing or boiling point of solvent. To express the effect of concentration on freezing point or boiling point, molality is used in place of molarity. Molality (m) is the number...
please answer as many questions with detail. 1. Evaluate how much "weight" (mass, strictly speaking) an average huma...
please answer as many questions with detail.
1. Evaluate how much "weight" (mass, strictly speaking) an average human loses daily due to gas exchange while breathing. Find all necessary data, indicate your sources, and present a detailed calculation. 2. 10.00 g of a Mg-Al alloy completely dissolved in hydrochloric acid. The volume of hydrogen gas given off in the chemical reaction is 12.29 L Find the mass composition (in mass %) of the alloy. Assume that the volume of 1...
Not yet answered Graded out of 1.00 Flag question Question text In the process of photosynthesis,...
Not yet answered Graded out of 1.00 Flag question Question text In the process of photosynthesis, water and carbon dioxide are produced. Select one: True False Question 2 Not yet answered Graded out of 1.00 Flag question Question text In the carbon cycle, combustion produces atmospheric oxygen. Select one: True False Question 3 Not yet answered Graded out of 1.00 Flag question Question text In a balanced chemical equation, the number of each type of atom in the reactants must...
i have no clue what amino acid this unknown is . maybe serine ?? pleade help!...
i have no clue what amino acid this unknown is . maybe serine
?? pleade help! i also need to locate the eq points it can be from
1-3 points but atleasy 2 , the pka2 location , and the expermental
molecular weight value. if you can label it on one of the graphs (
they are the same) the chocies are below ( it most likely will not
be glycine ) .
other data:
unknown weight obtained was =...
please complete the questions has not answering with clarification of the answer to any page Name...
please complete the questions has not answering with
clarification of the answer to any page
Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have...
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
3. The composition of a volume of 1 liter of dry air is given in the table below. Calculate (6 Points) Component Nitrogen Oxygen Carbon dioxide Hydrogen Monatomic gases(Ar, Rn, He, Kr.Ne) Total Vol (ml) Mass (mg) Molecular weight (g/gmol) 780.3 893.4 209.9 274.5 0.592 28.015 32.00 44.003 2.016 39.94 0.3 0. 5.8 x 106 9.4 15.39 1000 ,183.882 a. the mass fraction of Nitrogen in Air b. the molecular weight of air in (g/gmole) c. the density of hydrogen...
What is the relationship between the moles of solute and the
mass of solute?
Rewrite the molality expression in terms of grams and molecular
weight.
Background:
Properties that depend on the concentration of particles in solution are called colligative properties. The number of particles in a solvent can affect the freezing or boiling point of solvent. To express the effect of concentration on freezing point or boiling point, molality is used in place of molarity. Molality (m) is the number...
please answer as many questions with detail.
1. Evaluate how much "weight" (mass, strictly speaking) an average human loses daily due to gas exchange while breathing. Find all necessary data, indicate your sources, and present a detailed calculation. 2. 10.00 g of a Mg-Al alloy completely dissolved in hydrochloric acid. The volume of hydrogen gas given off in the chemical reaction is 12.29 L Find the mass composition (in mass %) of the alloy. Assume that the volume of 1...
i have no clue what amino acid this unknown is . maybe serine
?? pleade help! i also need to locate the eq points it can be from
1-3 points but atleasy 2 , the pka2 location , and the expermental
molecular weight value. if you can label it on one of the graphs (
they are the same) the chocies are below ( it most likely will not
be glycine ) .
other data:
unknown weight obtained was =...
please complete the questions has not answering with
clarification of the answer to any page
Name Lab Section _Date The Mole Concept and Atomic Weights The purpose of this activity is to better understand the concepts of relative atomic mass, counting by weighing and the mole. Percent composition and average atomic mass are included. Part I. Relative Atomic Masses and the Mole - Early Method When John Dalton proposed his atomic theory, he stated that the atoms of each element...
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
Separating a Mixture, Recrystallization, pre-lab
assignment
could you also explain why you chose that substance for the empty
spaces and question marks
EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
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