Copper(II) acetate containing 6Cu is used to study brain tumors. This isotope has a half-life of 12.7 hours. If you begin with 25.0 ug of "Cu, what mass remains after 63.5 hours?

Q: A principal shell with a value of n=3 would contain s,p,d, and f orbitals true or false

A: A principal shell is indicated by the principal quantum number.

Q: Smoke detectors in homes and apartments contain Am-241,

A:

Q: why lung and soft tissue appear different on a radiograph when they have both an effective atomic…

A: The radio graphic image will appear according to the effective atomic number.

Q: Elemental analysis of a compound with molar mass 342.3 g/mol gives the following mass percent…

A: Given Percentage of C= 42.11 %  Percentage of H=6.48 %  Percentage of O=51.41% To Calculate:…

Q: How many moles of sodium hypochlorite can be prepared from 32.5 g of NaOH?

A: Moles of Sodium hydroxide equals moles of Sodium

Q: Calculate these masses.

A: A large amount of unspecified size is known as mass. It is denoted as m.  The amount of space an…

Q: What does the formula DPD = SF – TP mean?

A: If a solute is added to water, it decreases its diffusion pressure. The difference between diffusion…

Q: If you have a sugar with a molecular weight of 315 g/mol, how many grams would you need to add to…

A: Given the molecular weight of sugar is 315g/mol. The volume of the solution is 487 mL and its…

Q: How many electrons must a nitrogen atom, Z = 7, gain to attain a noble gas configuration?

A: According to the Bohr concept of atomic structure, every atom gain or lose one or more electrons to…

Q: Question is attached

A: Mole ratios are used as a conversion factor between products of the reaction and reactants of the…

Q: For Be-10, find the: a.) mase defect (in grams)  b.) binding energy in kilojoules per mole. mass…

A: The difference between the assumed mass of the nucleus of the atom and the actual mass of the atom's…

Q: How many kilocalories are needed to vaporize 5.8 mol of Br2?

A: Bromine is a dark reddish-brown fuming liquid with a pungent odor. Denser than water and soluble in…

Q: What is the empirical formula for a compound that is 26.56% potassium, 35.41% chromium, and 38.03%…

A: A compound's empirical formula communicates a ratio between the numbers of atoms of various elements…

Q: The specific gravity of the following compounds are: Ether – 0.715; Bromine - 3.016; Glycerin -…

A: Specific gravity: Relative density is the ratio of the density of any substance to that of the water…

Q: C6h1206 is the chemical formula for a

A: Given formula: C6H12O6  It means 6 carbon, 12 hydrogen and 6 oxygen

Q: What is the mass in grams of 6.022 * 1023 O atoms of mass 16.00 amu?

A: The mole concept is a convenient method of expressing the amount of a substance. Any measurement can…

Q: If our alloy has a composition of 90% Sn and has a temperature of 100C, determine: a) What…

A: A phase diagram is a graph that depicts a substance's thermodynamic state at various pressures and…

Q: What is the mass in grams of 30.50 moles of KBr

A: The molar mass is defined as " It is the addition of all the atomic mass of atoms present in the…

Q: How does the atomic structure or composition of the versions of sodium in question C above differ…

A: According to the question, We have to explain how does the atomic structure or composition of the…

Q: When 0.5 mol of a certain ionic substance is dissolved in 1.0 kg of water, the freezing point of the…

A: The physical properties (freezing and boiling point) of a solvent caries n addition of solute. The…

Q: Another major use of bismuth has been as an ingredient in low-melting metal alloys, such as those…

A: Bismuth has the atomic number 83 and is the heaviest among all the elements in 5A. In the group 5A…

Q: How many moles of tungsten(VI) oxide and hydrogen were required to produce the 5.00 g of tungsten?

A: Stoichiometry is a section of chemistry that involves using relationships between reactants and/or…

Q: Which of the following correctly identifies the number of each element involved in the chemical…

A: The chemical formulas of a given molecule represent the simple ratios or the number of molecules of…

Q: Which do you think has a higher boiling point, pentane or neopentane (2,2-dimethylpropane)? Why?

A: The boiling point is the temperature at which the pressure of the liquid changes to the state of the…

Q: Nicotine, an alkaloid in the nightshade family of plants that is mainly responsible for the…

A: Nicotine is an alkaloid that is found especially in plants belonging to the nightshade family. It is…

Q: Ferrous sulfate is one dietary supplement used to treat iron-deficiency anemia. What are the…

A: Ferrous sulfate is an essential supplement, which is required by our body. It plays important role…

Q: Write the nuclear equation for the beta decay of Bi-214.

A: The bismuth-214 atom has an atomic number of 83 and an atomic mass of 214. Most of the known bismuth…

Q: Ethyl mercaptan is an odorous substance added to natural gas to make leaks easily detectable. A…

A: Given: Ethyl mercaptan is an odorous substance added to natural gas to make leaks easily detectable.…

Q: The molar stability of mercury (II) sulfide is below. What is the Ksp ?

A: Mercury II sulfide or Mercury sulfide (HgS) . It is almost insoluble in water. But, it can be…

Q: The following 'H NMR and IR spectra are obtained for an unknown compound with an empirical formula…

A: Given: The unknown compound with an empirical formula: C8H14O3 To determine: To determine the…

Q: What is the empirical formula of a compound that contains 72.0% carbon, 12.0% hydrogen and 16.0%…

A: Empirical formula  It is the formula of a compound in which the exact number of each atom is not…

Q: Define the mole, and calculate the molar mass of a compound from the molecular formula.

A: The mass of substance present in a sample of a given compound is divided upon the amount of…

Q: Write the nuclear equation for the alpha decay of Po-214.

A: The radioactive decay process is defined as the loss of energy by an unstable nucleus via emitting…

Q: The k of water is 1.86 kg °C/mol, approximately 4x the value of k,. If you attempted to freeze your…

A: Freezing point depression is a colligative property and it is noticed in solution when solute…

Q: Write the nuclear equation for the positron decay of C-11.

A: C-11 is a radioisotope of carbon. C-11 is an unstable atom that disintegrates by emitting radiation.…

Q: The radioactive isotope Yttrium-90 (Y-90, Z=39), a beta emitter, is used in cancer treatment and as…

A: Radioactive isotopes are used in several types of therapies such as cancer and arthritis etc.…

Q: What is the energy of the X-ray photon emitted by a tungsten atom in the transition from an L- shell…

A: The K, L and M shell electron binding energies of Tungsten are as follows K shell binding energy =…

Q: the molecular formula

A:

Q: How many spectral lines do you expect to see in a IR spectrum for NO2 and CO2? Considering…

A: IR spectroscopy is a type of spectroscopy that detects the light absorption by a compound. This…

Q: When ionic compound AB (12.0 g) is dissolved in water, it absorbs 2.00 kj of heat. The compound has…

A: Given : AB dissolved in water, it absorbs 2 kJ heat. AB heat of hydration , Delta Hhydration = -670…

Q: How many kilojoules are released by the combustion of 17.0 g of C8H18?

A: Carbon is the key element fount in all organic molecules. carbon have 4 valency. Based on the carbon…

Q: How many H2O particles were produced by creating the following structure? R H R R -N-Ç, H-N-C,- H H…

A: Extention of a polypeptide chain is a typical dehydration reaction where OH from carboxyl group and…

Q: Compound A has molecular formula C7H7X. Its 1H-NMR spectrum shows a singlet at 2.25 ppm and two…

A: Nuclear Magnetic Resonance is an analytical method to elucidate the molecular structure of…

Q: With the Boltzmann distribution, the population of electrons that correspond to the en- ergy levels…

A: Asked : Boltzmann distribution doesn't give population of electrons corresponding to energy levels

Q: What is the mass number of an ion with 107 electrons, 157 neutrons, and a +1 charge?

A: Mass number  It is defined as total sum of protons and neutrons in an atomic nucleus. The protons…