If the unknown copper salt a student worked with was copper (I) instead of a copper (II), would...
Question:
If the unknown copper salt a student worked with was copper (I) instead of a copper (II), would the calculated molar mass of the unknown salt change? Briefly explain.
Molar Mass:
The summation of atomic masses of all existing atoms particularly in one mole of a given substance represents the molar mass. The atomic mass of a particular atom demonstrates the total of protons and neutrons (not electrons) number.
Answer and Explanation: 1
Become a Study.com member to unlock this answer! Create your account
View this answerIt is given that the student has to use the salt of copper (II) but by mistake, the student used the copper (I) salt.
As the molar mass includes...
See full answer below.
Ask a question
Our experts can answer your tough homework and study questions.
Ask a question Ask a questionSearch Answers
Learn more about this topic:

from
Chapter 28 / Lesson 24What is molar mass? Learn the definition of molar mass and how it relates to the periodic table. See examples of how to use the molar mass formula.
Related to this Question
- When trying to determine the molar mass of an unknown copper compound, a student starts with 4.112g of copper salt. They perform a redox reaction and recover 2.025g of copper metal. Assuming only one copper ion in the unknown formula unit, what should the
- Calculate the percentage of copper in salt, with a formula mass of 187.09 and n = 2.
- What is the molar mass of copper (Cu)?
- Calculate the atomic mass of copper given that naturally occurring copper is 69.09% of 63 Cu which has an atomic mass of 62.93 amu and 30.91% of 65 Cu which has an atomic mass of 64.93 amu.
- Calculate the mass of copper contained in 1.855 grams of copper(I) chloride.
- Calculate the mass of Copper (II) sulfate CuSO_4 needed to make 3.00 L of 3.0 M solution?
- 1. Calculate the following for the oxygen: (a) The initial mass of copper in the moles of copper from the copper sulfate salt (MW of Cu= 63.55 g/mole) (g) (b) The mass of copper oxide obtained (g) (
- An unknown hydrate of copper (II) oxalate is to be identified in the lab. What is it? The following data was collected by a student: Mass of crucible = 23.776 g Mass of crucible + hydrate = 24.889 g M
- What weight of copper (II) oxide, CuO, would theoretically be produced from 1.623 g of copper? (Molar masses Cu = 63.55; O = 16.00)
- Calculate the following for the oxygen: a) The initial mass of copper in the moles of copper from the copper sulfate salt (MW of Cu = 63.55 g/mole) (g). b) The mass of copper oxide obtained (g) (the m
- A copper compound was found to be 33.3% copper. What is the formula mass of the copper compound?
- Calculate the molar mass of CuSO4 5H2O. A. 159.62 g/mol B. 249.70 g/mol C. 177.64 g/mol D. 185.72 g/mol E. 446.48 g/mol
- Use the following data to determine the following. Mass of Cu before electrolysis = 21.1578 g Mass of
- Mass (g) copper gluconate: 1.0 Mass (g) wrapper: 0.7 Mass (g) Wrapper + Cu: 0.8 Mass (g) Cu: 0.1 Mass (g) of gluconate: 0.9 How to calculate the percent composition of the copper and also the percent composition of the gluconate in the compound copper glu
- The passage of a current of 0.750 A for 25.0 min deposited 0.369 g of copper from a this information, calculate the molar mass of copper.
- Calculate the theoretical mass of Cu metal you would expect to recover from 1.401g of Copper (II) Bromide, CuBr2. (Mwt. Cu= 63.55g/mol, Mwt. CuBr2= 223.37g/mol).
- Calculate the empirical formula of an unknown copper oxide (CuxOy) compound based on the experimental data below. Show all steps of your work. Mass of copper: 1.478 g Mass of copper oxide product: 1.850 g
- 1. What is the mass of the gluconate? 2. What is the chemical formula of copper gluconate? 3. Determine the number of moles of copper in the copper gluconate.
- If a copper-containing compound is found to be 29.2% Cu by mass, and there is only one copper atom per formula unit, what is the formula mass of the compound in amu?
- Lab results are 1 g mass of copper gluconate, 0.1 g mass Cu, and 0.2 g mass of gluconate. How do you calculate the percent composition for each element in the compound copper gluconate. Clearly label each element and the percentage.
- How do you calculate the average atomic mass of copper?
- In a sample of a compound of copper and oxygen, CuxOy, we found that a 1.012-gram sample contained 0.898 grams of copper. What is the molar mass of the copper oxide?
- A 0.250-gram sample of a Cu compound is decomposed, yielding 0.161 grams of CuO. Determine the mass percent of copper in the compound.
- Calculate the percent composition of copper in the hydrate CuSO_4 cdot 5H_2O based on atomic weight data.
- Predict the maximum mass percent of copper that you would be able to retrieve experimentally from copper (II) sulfate.
- Suppose you start with 1.000 g of an unknown copper compound and isolate 0.9794 g of metallic copper. What is be the formula weight of the compound if there is only one copper atom per unit formula?
- Determine the mass of copper (ii) trioxonitrate(v) that will be formed when 15 g of copper is added to excess diluted trioxonitrate(v) acid.
- mass of impure copper = 3.478 kg mass of pure copper electrode = 275 g mass of pure copper electrode after refining = 2.918 kg electrolyte solution (0.70 M Copper II Sulphate) What is the percent by mass of copper found in the impure sample? What is the m
- Given that 0.160g copper when heated in oxygen becomes copper oxide of mass 0.200g, determine the formula of copper oxide. (AW: O 16, Cu 63.6)
- Calculate the mass of CuSO_4 in 2.26 grams of CuSO_4 \cdot 5H_2O.
- Copper has only two naturally occurring isotopes, Cu - 63 and Cu - 65. The mass of Cu - 63 is 62.9396 amu, and the mass of Cu - 65 is 64.9278 amu. Use the atomic mass of copper to determine the relati
- Determine the mass in grams of a sample of 0.2 mol Cu.
- The mass (g) of Cu is 0.3. The mass (g) of gluconate is 0.7. Calculate the percent composition for each element in the compound copper gluconate.
- Predict the maximum mass percent of copper that you would be able to retrieve experimentally from copper (II) chloride dihydrate.
- Cu2CO3(OH)2 = 2CuO + H2O + CO2 If there is 12.7 g of copper (II) carbonate hydroxide (Cu2CO3(OH)2), what mass of copper (II) oxide is expected to be produced? Calculate the percent error in the experiment using the experimental mass of CuO and the theor
- Based on the following information, calculate the percent by mass of salt in the mixture. Mass of beaker = 75.000 g Mass of beaker + unknown = 85.175 g Mass of beaker + salt = 75.175 g Mass of salt = 0.175 g
- The reported molar mass for the copper oxide formed in experiment 1 is 79.55 g/mol. What is the molecular formula of the oxide formed in experiment 1? The molar mass of copper is 63.55 g/mol and the molar mass of oxygen is 16.00 g/mol. To receive full poi
- What is the mass percent of copper sulfate CuSO_4 in a sample of copper sulfate pentahydrate CuSO_4.5H_2O?
- How would the calculated molar mass change (increase, decrease, no change) if the experimental problem below were encountered? Explain the reason(s) for your answer. Your unknown contained a substance that produces two ions per molecule of the unknown wh
- Calculate the mass of copper(II) sulfate pentahydrate needed to prepare 0.600 M stock solution of copper (II) from solid copper (II) sulfate pentahydrate, CuSO_4 cdot 5H_2O.
- How would the calculated molar mass change (increase, decrease, no change) if the experimental problem below were encountered? Explain the reason(s) for your answer. The unknown was impure and only part of the unknown dissolved in the lauric acid.
- 1. Record and calculate the following about the copper sulfate pentahydrate (a) mass of CuSO4*5H2O (g) (b) Molecular weight of CuSO4*5H2O (c)Moles of CuSO4*5H2O (d)Moles of Cu in the copper sulfat
- An empty crucible has a mass of 25.70g. After some copper (II) sulfate pentahydrate is added, the mass is 28.855g. What is the mass of the copper (II) sulfate pentahydrate in the crucible? A) 3 g B) 3.2 g C) 3.16 g D) 3.1550 g
- An empty crucible has a mass of 25.70 g. After some copper (II) sulfate pentahydrate is added, the mass is 28.855 g. What is the mass of the copper (II) sulfate pentahydrate in the crucible?
- Basic copper carbonate contains 57.84% copper and 5.43% carbon by mass. What mass of copper, in grams, is contained in 7.061 kg of basic copper carbonate?
- Determine the percent by mass of water in your sample of hydrated copper (II) sulfate. Mass of water = 0.95 g Mass of anhydrous copper sulfate = 2.19 g Mass of hydrate copper sulfate = 3.14 g
- Determine the theoretical mass percentage of Copper in Copper Glycinate monohydrate product.
- Calculate the percent recovery of copper using the given data. Use the formula % recovery = (ending mass of copper (g)/(initial mass of copper)) x 100%.
- An ore sample is known to contain copper sulfate pentahydrate,CuSO_4\cdot5H_2O. If a 10.000 g sample of the ore loses 0.336 g of water when heated strongly, what is the maximum quantity of CuSO_4\cdot5H_2O that could be in the sample? (Molar Mass CuSO_4 \
- Calculate the formula weight of each ionic compound. a. CuSO4, a common copper supplement b. ZnO, a common zinc supplement
- A student was given CaCl2 hydrate and from laboratory work obtained the following data: mass empty crucible 13.1381 g mass crucible + hydrated unknown 14.8205 g mass crucible + unknown after 1st he
- Use the following data to calculate the empirical formula for copper sulfide. Mass of crucible and lid = 23.207 grams Mass of crucible, lid, and copper = 23.343 grams Mass of crucible, lid, and copper sulfide (after final heating) = 23.377 grams
- A student was given CaCl2 hydrate and from laboratory work obtained the following data: mass of empty crucible = 13.1381 g mass of crucible + hydrated unknown = 14.8205 g mass of crucible + unknown after 1st heating = 14.0035 g mass of crucible + unknown
- Calculate the molar mass of sodium chloride.
- Suppose 2.3754 grams of copper (II) sulfate pentahydrate is heated to drive off the water of crystallization. Calculate the weight of anhydrous salt that will remain.
- If an unknown metal M is 0.521 g, how do you calculate its atomic mass?
- Calculate the mass of water lost from your sample? Given: Mass of crucible- 18.50g. Mass of crucible+hydrate- 19.50g. Mass of crucible+anhydrous salt 1st heating- 19.10g. Mass of crucible+anhydrous salt 2nd heating- 19.10g.
- 2.80 mol of unknown substance weighs 22.1 g, what is the molar mass?
- In an experiment, a mixture of copper and sulfur was heated to produce a sample of copper sulfide. The following data were obtained. Calculate the empirical formula of copper sulfide. Weight of the empty crucible = 2.077 grams Weight of the crucible + cop
- The atomic weight of copper is 63.546 amu. The two naturally occurring isotopes of copper have the following masses. a) ^(63)Cu, 62.9298 amu b) ^(65)Cu, 64.9278 amu Calculate the percent of ^(63)Cu in naturally occurring copper.
- A chemist heats a sample of copper (II) sulfate and finds that 63.9 % of the mass is copper (II) sulfate and the other 36.1 % by mass is the water. What is the formula of the hydrate?
- In 140.002 grams (1 mole) of copper sulfate, there are 50.004 grams of copper, 20.00 grams of sulfur, and the rest is oxygen. What percent of copper sulfate is copper?
- Suppose 2.3754 g of CuSO4 5H2O is heated to drive off the water of crystallization. Calculate what weight of anhydrous salt will remain. The molar mass of CuSO4 5H2O = 249.70 g/mol and the molar mass of CuSO4 = 159.60 g/mol.
- What is the mass percent of Cu in copper (II) sulfate pentahydrate CuSO_4 \cdot 5H_2O?
- A sample of 2.80 mol of unknown substance weighs 22.1 g. What is the molar mass?
- A student had a sample of BaCl2.2H2O. He heated a sample until the mass did not change. From this data, calculate the percentage of BaCl2 in the original sample. Mass of crucible+cover=26.39g Mass
- If a student used an iron scoopula, instead of a plastic one, to add the unknown metal to the HCl solution, will it affect the calculated molar mass of the unknown metal?
- Blue copper sulfate pentahydrate (CuSO_4.5H_2O) crystals were heated to give the white monohydrate. What percentage of water was lost? (molar mass of CuSO_4.5H_2O is 250.5 g/mol)
- Calculate the molar mass of CuSO4 5H2O.
- In a 100 g sample of copper, 69 g were Cu-63 while 31 g were Cu-65. Find the average atomic mass.
- The mass of a single copper atom is 1.055 10-22 g. This is the same mass as:
- What is the percent water in copper (II) sulfate pentahydrate (molar mass of copper(II) sulfate pentahydrate = 159.61 g/mol, molar mass of H_2O = 18.01 g/mol)?
- You have purified a new protein and find that it contains 0.198 percent Cu. Assuming that there are three atoms of copper per molecule of protein, what is the molar mass of the protein?
- A compound of Copper and Sulphur is 65.43 percent Copper by mass. How many grams of Copper can be obtained from 249 g of this compound? And how many grams of Sulphur remain?
- A student had a sample of BaCl_2 * 2H_2O. He heated a sample the mass did not change. From this data, calculate the percentage of BaCl_2 in the original sample. mass of crucible + cover = 26.39 g mass
- A 5.897 g sample of an ore that contains copper metal is treated with nitric acid followed by the addition of sodium carbonate. A mass of 2.235 g of copper (II) carbonate was obtained. Calculate the mass percent copper in the original ore sample.
- The molar mass of silver is 107.9 g/mol. What is the mass of a single silver atom? Explain.
- Use the following data to calculate the empirical formula for copper sulfide. Mass of crucible and cover 23.207 g Mass of crucible, cover and copper 23.343 g Mass of crucible cover and copper sulfi
- A copper oxide sample weighing 0.5424 g is found to contain 0.4831 g of copper. Determine the formula of this copper oxide.
- How do you use the molar volume to find the atomic weight of an unknown chemical?
- Calculate the molar mass of sodium sulfate.
- Copper (II) flouride contains 37.42 % F by mass. Use this percentage to calculate the mass of fluorine (in grams) contained in 35.6 g of copper (II) fluoride. How many grams of Cl are present in 55 g
- A mass of a copper oxide weighed 10.00 grams. The reaction was run and the amount of just copper obtained was 8.88 grams. What is the empirical formula of the compound?
- For a copper-silver alloy of composition 58 wt% Ag-42 wt% Cu and at 775 C (1425?F) do the following: (a) Determine the mass fractions of A and B phases. (b) Determine the mass fractions of primary and
- What is the mass percent of water in copper (II) sulfate hydrate?
- A sample of raw mining ore contains a hydrated salt called copper sulfate pentahydrate, CuSO4.5H2O. If a 9.854g of the ore loses 1.499g of water when heated strongly, what is the mass percentage of
- 1. Use the formula of CuSO_4.H_2O to determine the mass percent of water in copper(II) sulfate pentahydrate. 2. A 5.000-g sample of CuSO_4.5H_2O was heated several times, eventually leaving a solid residue with a mass of 3.196 g. Calculate the experiment
- What is the molar mass of a substance? How is it calculated?
- What is the percent by mass of copper sulfate, CuSO4, in a sample of copper sulfate pentahydrate, CuSO4, 5H2O?
- Empirical Formula of Copper Sulfate Mass of crucible and cover + copper wire(befrore heating) 41.94 grams Mass of crucible and cover 40.16 grams Mass of copper wire 0.0118 Mass of crucible and cove
- What is the molar mass of Cu(NO3)2?
- What is the mass of water required to prepare 250.0 g of 10.0 % copper (II) sulfate solution?
- From 0.323 g of an unknown sample M_xCl_y, 0.523 g AgCl was recovered using the gravimetric analysis employed in this experiment. a) What is the percentage of Cl in the unknown sample? b) What is the theoretical molar weight of the metal in the chloride s
- What is the percent by mass of CuSO4 in a sample that is 74.4% CuSO4, 5H2O by mass?
- The student had not completely dried the Cu before the final weighing. How does this effect percent of Cu and formula determination?
- Use the following data to calculate the empirical formula for copper sulfide. Mass of crucible and cover 23.207 Mass of crucible, cover and copper 23.343 Mass of crucible cover and copper sulfide (
- A sample of hydrated copper (II) sulfate has a mass of 4.56 g. After heating, it has a mass of 2.92 g. What is the percent by mass of water in the hydrate?
- The chemical formula of sodium chloride is NaCl. Calculate its molar mass - include units.
- Silver chloride contains 75.27% Ag by mass. Calculate the mass of chloride (in g) contained in 155 g of silver chloride.
- What is the mass of one formula unit of CuSO4?