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A: Given : Mass of (NH4)2SO4 = 29.85g
Q: e limiting reagent
A:
Q: The guest list included 170 people who were invited, but 102 people showed up. What is the percent…
A: Given Data: Total Number of People = 170 Number of People Showed Up = 102
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A:
Q: How many oxygen atoms are in 8,80x 10-5grams LiHSOg? Hint: must use Avogadro's number Put your…
A:
Q: What is the percent error? And how do I find it with the information provided.
A: Percent error or percentage error expresses as a percentage the difference between an approximate or…
Q: what is the mass, in grams
A:
Q: How to use mass percent composition as a conversionfactor ?
A: The mass percentage determines the composition of the compound that is present in the substance.…
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A: Given mass of lron (II) sulfide , FeS is 337.5 grams. Atomic mass of S = 32 g/mol Molar mass of…
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A:
Q: The percent by mass of oxygen in CH4O is? (Answer in significant figures)
A:
Q: a) State two reasons why the front door of the balance is closed during weighing.
A: Since you have posted multiple questions, as per guidelines we will solve only the first one for…
Q: How many grams are in 491 mg ? Express your answer numerically in grams. • View Available Hint(s) ?…
A: The unit conversions are performed using equality factor. Here, mg (milli gram) has to be converted…
Q: Part A Measure and record the masses of all the metal strips you set out in front of the test tubes.
A: 1. molar mass of Magnesium is24.305 g/mol. 2. Zinc mass number of 65.39 g/mol. 3. Copper atomic mass…
Q: When doing percent error do the estimated value and true value need the same amount of sig figs or…
A: The true value and the experimental values are calculated under different experimental conditions…
Q: What are the table values for this molecule if given 12mL?
A: Given information,
Q: Part A What is the percent Cr, by mass, in the steel sample? Express your answer to three…
A:
Q: e the mass
A:
Q: The analyst would use an analytical balance during sample analysis, what would you recommend her/him…
A: Make sure that you place the balances in an area with constant humidity and temperature. The…
Q: PLEASE make sure sigfigs and rounding are correct.
A: Here is a graph of the pressure of dinitrogen dioxide (N₂O₂) in a reaction.,
Q: The relative error calculated for the analysis of Zn alloy was -4.1%. Assuming that the sample is…
A: The relative error is the ratio of absolute error to the measurement being taken multiplied by 100.…
Q: 41. Add the correct coefficients to properly balance this equation. C10 H16 + Cl, → C+ HC1
A: Equation is balanced when the number of elements are equal in both sides of the equation.
Q: Convert magnesium from mass to moles, and then find the molar mass of mg. Mass in grams of Mg…
A: Moles of magnesium can be calculated as follows:
Q: ? stands for a number the student is going to calculate.) the missing part of this equation. your…
A: We will write the conversion
Q: mass
A:
Q: Find the mass of 1 molecule of NO in gram.
A: Given :- number of molecules of NO = 1 molecule To calculate :- mass (in g) molar mass of NO =…
Q: milliliters o
A:
Q: Find the mass of 1 molecule of HF in gram.
A: 1 mole = 6.022×1023 [ Avogadro number ] The mass of 1 mole of molecules of a substance is called its…
Q: The guest list included 179 people who were invited, but 81 people showed up. What is the percent…
A: Given: Actual = 81 And theoretical = 179
Q: The molar mass of an unknown compound was determined in three repeat experiments. The molar masses…
A:
Q: How can mass and volume data for an unknown sample be used to identify the unknown?
A: Mass gives the quantitative aspect of the substance i.e., how much amount of the matter is contained…
Q: Mass - kg
A:
Q: Calculate the percent error for the recovered salt Calculate the total mass of the recovered solids…
A: The percentage error for a given experimental value is calculated by the expression (1), where, mt…
Q: 2. Using your data from Part II of the experiment, determine the percent water in the original…
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Q: 52.96 % 0679 Submit Previous Answers Correct Part D Calculate the percent C20 in K3[Al(C2O4)3]-3H20…
A:
Q: What were the experimental errors that could have led to your percent error? Be specific.
A: Beer’s Law is only true for dilute solutions the exact range of solutions must be determined…
Q: 1. Moles of NaHCO3 and NaCl: 2. Mole Ratio: 3. How does your experimental ratio compare to the…
A:
Q: Calculate the total percent recovery for this separation using the following formula: total mass of…
A: The formula required to calculate total percent recovery is as follows, Total percent recovery=Total…
Q: Find the % mass for NH3 and CU in the compound. Please help!
A: NH3 + HCl ---> NH4Cl moles of NH3 present = moles of HCl used…
Q: How many oxygen atoms are in 5.23x 10-7 grams LiHSOz? Hint: must use Avogadro's number Put your…
A: First of all find the number of moles of LiHSO3 by using following relation- mole = mass/molar mass…
Q: A hospital technician prepares a parenteral nutrition product that measures 3,125 mL. According to…
A: Given that , Correct volume = 3 liters = 3000 ml Measured volume = 3125 ml
Q: e smallest whole number coefficients.
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Q: Calculate the mass (in grams) of 0.513 mol of titanium. Express the mass to three significant…
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Q: In the analytical strategy, can one analysis the data before obtaining the sample. True False
A: For the analysis of the data of a sample, the primary step is to determine the sample that is to be…
Q: When calculating the percent error how do I know how many digits should be in my final answer can…
A: The difference between a measured value (experimental value) and an exact value (theoretical value),…
Q: 29) -N-N=0 + NANO, + HCI
A:
Q: Determine the formula weight of KBr. Provide an answer to two decimal places.
A: Formula weight of a molecules is determine by sum of masses of all its atoms.
Q: C MOLE AND MASS RATIO P
A:
Q: Given the data and information in the prompt, what is the calculated absolute error on the percent…
A: Absolute Error is the amount of error in your measurements. It is the difference between the…
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- The boiling point of a liquid is calculated to be 454 K. What is this temperature on the Celsius and Fahrenheit scales?A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 74.3 ºC. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 ºC. What is her percent error?A chemist analyzes a sample of iron ore furnished by the National Institute of Standards and Technology, NIST. He obtains the following results: = 10.52%, s = 0.05, n = 10. The NIST's value for this sample is 10.60% Fe. Is the chemist's result (mean) significantly different at the 95% confidence level?
- 1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…
- 1. All answers to be entered via short answer are in the numerical format and presented up to the 3rd decimal place. Add trailing zeros if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT. For uniformity of answers, please be guided by the following examples: If your answer is 5.627594, enter 5.628 If your answer is 3.129934, enter 3.130 If your answer is 8.38, enter 8.380 If your answer is 1.2, enter 1.200 If your answer is 25, enter 25.000 If your answer is less than the value of 1, always place a zero before the decimal point (example: 0.5, enter 0.500) 2. In cases for answers in the exponential format, please be guided by the following examples and format: Do not convert your answer to decimal format If your answer from the calculator is 1.23454566 x 10E-4, enter 1.235x10^-4 (no spaces in between) If your answer from the calculator is 7.379566 x 10E-5, enter 7.38x10^-5 (no spaces in between) 3. For the atomic weights, it should be rounded to the nearest whole…After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40 and processing her data, Sally found that her drinking strength Kool-Aid sample had a concentration of 4.692 x 10–5 M. If 0.132 grams of Kool-Aid powder was used to prepare an 8-fl oz cup of her assigned flavor, what is the percent by mass of FD&C Red 40 in her Kool-aid powder? Report your answer as a percentage with two places after the decimal. Do not include the percentage sign in your answer. Pay attention to units. You are trying to find the mass percentage of red dye, so you need to know each variable in the equation in Appendix B. Note that the percent by mass equation should be multiplied by 100. There may be some useful conversion factors in the experimental procedure.You must enter the answer with one number pass the decimal. ** You perform a distillation of a certain liquid at two different pressures The first distillation was done on a day when the pressure was 760 mmHg. The boiling point (the range where we saw drips come over) is 365. This is in Kelvin. (This is the normal boiling point of that liquid) Then you connected the adapter to a vacuum. The liquid now boils at 348 Kelvin. The enthalpy of vaporization in kJ/mol is 29.1 Hint: Clausius Clapeyron equation In(P2/P1) =DHvap/R* (T2-T1)/(T2T1) or In(P2/P1) =DHvap/R* (1/T1 - 1/T2) R = 8.3145 J/mol K
- 1. A student weighs an empty special round bottom flask and stopper. He finds the mass to be 56.972 g. He then adds about 5 mL of an unknown liquid and heats the flask in a boiling water bath at 100°C. He allows all the liquid to vaporized and then removes the flask from the bath, stoppers it, and lets it cool. Upon cooling, he briefly removes the stopper, then replaces it and weighs the flask and condensed vapor, obtaining a mass of 57.917 g. The volume of the flask is known to be 240.2 mL. The barometric pressure in the laboratory that day is 743 mm Hg. What was the pressure of the vapor in the flask in atm? O 0.9776 atm 0.98 atm 0.978 atm 0.977 atm2.A student is trying to determine the volume of a flask and compare it to the known volume. After performing the measurements 10 times, the student calculates an RSD of 2 ppt, with a percent error of 24%. Which of the following statements about the results are correct? A. The line fits the points on the calibration curve well. B. The results are precise and accurate. C. The results are accurate, but not precise. D. The results are precise, but not accurate. E The results are neither accurate nor precise.You try your best to put your samples in the middle of the balance pan when you try to weigh them every time. However, you know that it is impossible to place your samples in the same location each time. This discrepancy introduces error to your measurements. systematic random