A loss of 0.4 mg of Zn occurs in the course of an analysis for that element. Calculate the percent relative error due to this loss if the mass of Zn in the sample is *(a) 30 mg (b) 150 mg *(c) 300 mg (d) 500 mg
Q: The number of protons in the nuclide neptunium-237 Express your answer as an integer.
A: The mass number is the sum of the number of neutrons and number of protons. The atomic number is…
Q: I need help with number 5
A: The enthalpy change of the reaction is determined as follows:
Q: Mass of evaporating dish grams 131.43g mass in kg lbs tons dg
A: Given: Mass of evaporating dish in grams = 131.43 g To find: Mass of evaporating dish in Kg, lbs,…
Q: A sample of iron weighing 15.0 g was heated with potassium chlorate (KCIO3) in an evacuated…
A:
Q: Seven replicate measurements of a sample containing 2.00 ng of Hg per liter gave readings of 188,…
A: Answer: The detection limit of an individual analytical procedure is the lowest amount of analyte in…
Q: T / F Same mol’s of Ag and Au have same chemical particle counts. T / F Same counts of Ca and Mg…
A: Answer:- There are many formulas to calculate the moles of any element. mole = no. of particles…
Q: If the intensity of radiation from a radioactive sources is 7.5 units at a distance of 6.9 m, how…
A: Given: Intensity at 6.9 m distance = 7.5 units. And the intensity is 0.38 units finally at a…
Q: If the plant produces 1.6 *106 kg of Cl2 daily estimate the quanties of NaOH produced. Answer in kg…
A: The number moles of Chlorine is calculated as,
Q: Now that you have the contribution from the X-19 isotope (2.715) and from the X-21 isotope (18.00),…
A: Given the contribution from the X-19 isotope = 2.715 amu contribution from the X-21 isotope = 18.00…
Q: Identify the particle represented by X 235U + in → 23Zr + 1357TE + 2X 135Tе + 2X 40 4 (A В c) (D
A:
Q: The accompanying summary data on Ceo, particle sizes (nm) under certain experimental conditions was…
A: Total number of observations = 5 + 15 + 27 + 33 + 21 + 15 + 6 + 1 + 3 + 1 = 127
Q: sa particle.
A:
Q: Theodor Boveri said, “The nucleus doesn’t divide; it is divided.” What was he getting at?
A: Here mentioned nucleus is related to the basic unit of life i.e. living cell nucleus. The eukaryotic…
Q: Topic titled X-ray no less than 5 pages
A: X-rays radiation are the form of electromagnetic waves. X-ray gives the pictures of inside part of…
Q: Select the pair of elements you would expect to have similar properties. RbRb and SrSr PP and NN HH…
A:
Q: The density of ground uranium in a particular contaminated field is 0.02 mg/m3. A loader with a 24…
A: Solution Given data :- density of uranium in the field = d = 0.02 mg/m3 volume of bucket = V = 24 m3…
Q: Cककलैण केट कंजकदू तवंन गण्डकैनाड ह:- ) स्2e- 26 c9१.) ヘt8.てt3 C42t caa)+ 2e- C4CS) co _to.34U Sm2t…
A:
Q: A typical diameter for a newly formed neutron star is
A: A typical diameter for a newly formed neutron star is
Q: a 25-mL sample of chronium-51 contains 1.00 mCi. If a paitent is to recieve a 50-uCi dose to undergo…
A: The conversion of 50-uCi to mCi is shown below:
Q: 11:11 Ô A D Instructions - Classes - C... https://coetbschemfabon.neolm. Fill in the blanks: (4.1)…
A:
Q: Activity (counts/sec) 1 mm Cardboard Туре of Radiation Source No shielding Paper 1 mm Aluminum 7…
A: 1. Alpha particle is a helium nucleus, its penetrating power is negligible.
Q: _____→233 U 92+0 e -1 Express your answer in isotopic notation.
A: According to the law of conservation of atomic mass and number, the unknown element can be…
Q: Q11:. The size of the nucleus is experimentally determined using Rutherford's a-scattering…
A: Density is a measure of mass per volume. The average density of an object equals its total mass…
Q: 17. Write the atomic mass for Carbon to 3 significant figures.
A: Carbon is non metal Carbon Symbol is C Carbon atomic number is 6 Carbon electronic configuration…
Q: There are two naturally occurring isotopes of boron (10 B or 11B). As. listed on the periodic table,…
A: The data for boron is shown in table below.
Q: 2/11 uestion 3 of 9, Step 1 of 1 Correct ones from the skeleton of a fish have lost 75 percent of…
A: Given-> K = 0.000124 year-1
Q: Thallium-201 is a radioisotope used in brain scans. If the recommended dose is 3.0 mCimCi and a vial…
A:
Q: Give the nuclear symbol for the isotope of potassium for which A = 40 ? Enter the nuclear symbol for…
A:
Q: nu(frequency)=4.071*10^-19/6.626*10^-34 can someone find the value of nu and show the steps please,…
A: Given here an expression for frequency, we are asked to solve the expression for frequency.…
Q: Consitor the foltowing hafaeartons- f2 cg) +2e- -→ 2F Caq) ヘt8.1t3 E° 2 to.34U Smzt Caq)+ze → sncs)…
A: The half-reactions given are,
Q: Determine the missing element ---- 3516S----> -10e + ?
A: From given nuclear reaction Missing element in the reaction is shown below
Q: 1:47 14.0 U * KBIS LIED il Rl 57% Adobe Scan 09 Dec 2021 and s
A: E : present C2 axis : absent C3 axis : absent i : absent Sigma plane : absent Because benzene…
Q: ! 1 ső: F1 6 Q 5 ОН 3 CH2OH OH 2 ** F2 W #3 ОН 1 2 ОН 80 F3 E $ 4 a F4 R 07 8⁰ % 5 16 T A 6 MacBook…
A: ->An anomeric carbon can be identified as the the carbon bonded as the carbon bonded to the ring…
Q: Give the nuclear symbol for the isotope of beryllium for which A = 10 ? Enter the nuclear symbol for…
A: Isotopes of an element have same number of protons but differ in number of neutrons, which has equal…
Q: 7.53 Calculate th 20°C if the pressi radius is 0.040 cm
A:
Q: + + + + + + + + Play Mass Charge L -1 +1 dentify which particles curve towards the positively…
A: The positively charged particle will be attracted by the negatively charged plate and repelled by…
Q: Radioactive sodium-24 is used to treat leukemia. If a patient must receive 190 µCi/kg and the…
A: Radioactivity is a spontaneous process in which an unstable nucleus ejects small energetic particles…
Q: I Review | Constants | F What are the number of protons, neutrons, and electrons in the following…
A: For a given atom the atom number represents number of protons present in it. The mass number…
Q: 43 100 80 60 27 29 40 28 41 42 39 20 58 15 10 20 30 40 50 60 Mass/charge (mle) Relative abundance…
A: Mass spectrometry is the most accurate method for determining the molecular mass of the compound and…
Q: The correct Ksp equation of Pb3(PO4)2 is. .. . O a. Kgp= [2P62*1 [3PO,3-12 %3D O b. Ksp =…
A: We need to find the Ksp for Pb3 (PO4)2 .
Q: 1. A. Complete/Completing analysis B. Trace analysis C. Proximate analysis D. Ultimate analysis 2.…
A: Note: Since you have posted a question with multiple sub-parts, we will solve the first three…
Q: Since Cu (Copper) has a d count of 10 (d10). Hence, what is the d count for Cu(I)?
A: The configuration of Copper – Cu = 1s2 2s2 2p6 3s2 3p6 3d10 4s1
Q: What form of emission is depicted in this nuclear reaction (the particle is not shown)
A: The nuclear reactions are a type of chemical processes which lead to the formation of some new…
Q: what is an intensive observation of gold?
A:
Q: I3 write a hypothesis for how you think that decay constant is related to the concentration of the…
A: The decay constant(λ) regulates the rate at which the total number of nuclei declines. Unknown…
Q: The 105 howitzer refers to the bore size of the weapon in mm. Thus, the “105” has a 105 mm bore…
A: Given : bore size = 105 mm and bore size in caliber = bore size in inches X 100
Q: a - particles are slow moving and more penetrating than y (Gama) particle. * True O False O O
A:
A loss of 0.4 mg of Zn occurs in the course of an analysis for that element. Calculate the percent relative error due to this loss if the mass of Zn in the sample is
*(a) 30 mg (b) 150 mg *(c) 300 mg (d) 500 mg
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
- Richards and Williard determined the molar mass of lithium and collected the following data (a) Find the mean molar mass determined by these workers. (b) Find the median molar mass (c) Assuming that the currently accepted value for the molar mass of lithium is the true value, calculate the absolute error and the present relative error of the mean value determined by Richards and Williard. (f) What factors have led to changes in molar mass since 191? (g) How would you determine the accuracy of a molar mass? Experiment Molar mass, g/mol 1 6.9391 2 6.9407 3 6.9409 4 6.9399 5 6.9407 6 6. 9391 7 6. 9406In compounding a prescription, a pharmacist weighed 0.05 g of a substance on a balance insensitive to quantities smaller than 0.004 g. What was the maximum potential error in terms of percentage?Carbon 14 dating The technique of carbon 14 (4C) dating is used to determine the age of archaeological and geologi- cal specimens. The formula T = -8310 In x is sometimes used to predict the age T (in years) of a bone fossil, where x is the percentage (expressed as a decimal) of 14C still pres- ent in the fossil. (a) Estimate the age of a bone fossil that contains 4% of the 14C found in an equal amount of carbon in present- day bone. (b) Approximate the percentage of "C present in a fossil that is 10,000 years old.
- 7. 22 This question is about several salts. (a) A hydrated salt, compound A, is analysed and has the following percentage composition by mass: Cr, 19.51%; CI, 39.96%; H, 4.51%; O, 36.02%. Calculate the formula of compound A, showing clearly the water of crystallisation. Show your working. formula of compound A = (b) A student carries out an experiment to determine the amount of water of crystallisation in the formula of another hydrated salt. The student intends to remove the water by heating the hydrated salt. A diagram of the apparatus used by the student is shown below. crucible pipeclay triangie The student adds the hydrated salt to the crucible and weighs the crucible and contents. The student heats the crucible and contents and allows them to cool. The student weighs the crucible and residue. The student's results are shown below. 16,84 Mass of crucible + hydrated salt/g 16.26 Mass of crucible + residue after heating/g10. Which of the following does not match the others? (A) 67.2 3.88 1000 100 (B) (C) 1s 2s 2p (D) ofelectrons(a) H₂O2 molecular mass conversion factor (b) C6H12 molecular mass conversion factor (c) SO₂Cl2 molecular mass conversion factor U u u 1
- What is the average mass (in grams) of a single carbon dioxide molecule? (a) 3.8 × 10-26 g (b) 7.31 × 10 23 (c) 2.65 × 1025 (d) 44.01 g 8,An analyst performed an analysis of a sample for its calcium ions content got the followingresults: 0.0077 %, 0.0080 %, 0.0079%, and 0.0082 %. The actual amount of the ions in thesample is 0.0095%. What conclusion can you deduce about the accuracy and precision ofthese results?Suppose that in a gravimetric analysis, you forget to dry the filter crucibles before collecting precipitate. After filtering the product, you dry the product and crucible thoroughly before weighing them. Is the apparent mass of product always high or always low? Is the error in mass systematic or random?
- A sample of a compund made entirely from copper and oxygen was founf to have a total mass of 0.1431g. The mass of the copper om the compound eas found to be 0.1271g.(i)Calculate the mas of oxygen in the sample. (ii)Calculate the number of moles of oxygen in the sample. (iii) Use the mole ratio of copper to oxygen rounded off to the nearest whole nmber to determine both the formula and the molar mass of the compound.Mass of 0.1 mole of methane is (a) 1.6 g (b) 0.1 g (c) 1g (d) 16 gBe sure to answer all parts. Urea, chemical formula (NH,)½CO, is used for fertilizer and many other things. Calculate the number of N, C, O, and H atoms in 1.68 x 10* g of urea. Enter your answers in scientific notation. (a) Nitrogen, N x 10 atoms (b) Carbon, x 10 atoms (c) Oxygen, x 10 atoms (d) Hydrogen, H x 10 atoms