Chemistry A moisture density guage has radioactive source containing the isotope cs-137 has half life of 30.17 years. When new, radioactive source has an activity of 8 milicuries what is the activity of guage that is 5.0 years old

Q: What is the Ka expression for this reaction? HC2H3O2(aq) + H2O(1) H30*(aq) + C2H3O2°(aq)

A: The equilibrium constant for the given expression is known as the acid dissociation constant (Ka).

Q: A) Calculate the half-life of the antimicrobial agent at 25°C. Be sure to include the units. B) The…

A: For a 1st order chemical reaction, the rate equation is as follows, ln[A] = -kt + ln[A]0 Where, [A]=…

Q: Rank the following by decreasing boiling points, so that 1 is the highest and 4 is the lowest.…

A: Corboxylic acid and alcohol will have high boiling point due to intermolecular hydrogen bonding .…

Q: A 0.800 M solution of NH3 is prepared and is in equilibrium with its ions. What is the hydroxide ion…

A:

Q: whether this lewis structure is correct or not .If it not correct then give reason why it is…

A: Boron has three valence electrons  So, it can form only three bonds. So, it is incorrect

Q: Part A An analytical chemist is titrating 225.6 ml. of a 0.8000 M solution of acetic acid (HCH,CO,)…

A:

Q: The drawing below shows that cis-1,2-dichlorocyclohexane is chiral. Efforts to resolve this compound…

A: Cyclohexane  exist in chair form.

Q: NH2 (c) ets

A: This question have multi subparts questions so I will solved first three subparts for you. rest of…

Q: Mn(OH), has a molar solubility of 2.2 x 10-5 M. Calculate the Ksp value for Mn(OH),.

A: Molar solubility of Mn(OH)2 = 2.2 × 10-5 M  Ksp value for the Mn(OH)2 = ?

Q: The pH of blood plasma is 7.40. Assuming that the principal buffer system in blood is HCO, /H2CO3,…

A: Given,  pH of blood plasma = 7.40

Q: РОСЬ, Ме2N.CНО SO3, Pyridine PhN2 CI aq. KOH N-Chlorosuccinimide, H MEOH or NaOCI, base…

A:

Q: How do you find/work through the process of finding the structure of the following

A: C12H16O2    Degree of unsaturation = 5

Q: During a mass spectrometry experiment, the spectrum of vascular endothelial growth factor A (VEGF-A)…

A: Given the main value for the VEGF-A, X = 1024.5210 Da Absolute error, ∆X = 0.06 Da

Q: Why does O2 have a higher entropy than H2 when both of them are linear molecules?

A: Molecular oxygen have higher entropy than molecular hydrogen and both are in linear structure.  You…

Q: Cal Culate the sG° of the reec fim with 2NO2 (8) > 2NO(9) + Oz 18) + 02 Kp = 2.016 x 10 -13 at 25…

A: We know  at equilibrium deltaG = 0 So,  deltaG° = - RTlnKp

Q: QUESTION 20 Balance the following electrochemical reaction in acıd: MnO 4 (aq) + Zr( s) → Mn 2*( aq)…

A: Detail solution is given below

Q: Consider the following equilibrium system involving SO2, Cl2, and SO,Cl2 (sulfuryl dichloride):…

A: The reaction given is, => According to LeChatelier's principle, the reaction equilibrium will…

Q: 5 6 C 10.81 12.01 13 14 Al Si 26.98 28.09 22 23 24 25 26 27 28 29 30 31 32 Ti Cr Mn Fe Zn Ga Ge 96…

A: As we know. When Hydrogen is bonded with more electronegative element like-oxygen, Fluorine) then…

Q: A H, fuel cell generates 4A current output, cell reaction: H,(g) + ½O,(g) → H,O(g) (1) What is the…

A: Answer: Given Fuel cell reaction is: H2(g)+12O2(g)→H2O(g)

Q: 1. Predict the solubility of the solute. Justify your answer a. KBr in CCI b. NaCl in H,0 c. LINO,…

A: below answer is given

Q: NH2 сно ноос

A:

Q: Na al y

A: The reactions given are,

Q: Which bonds would be covalent bonds? C-Cl C-H Na-O Fe-Cl Zn-S N-O

A: ->Ionic bonds formed between metal and non-metal. ->Covalent bond formed between non-metals.

Q: solution whose freezing point is -0.930°C is the boiling point of a solution made by g 31 g of NaCl…

A: 14) Mass of solute = 22.5 g Mass of water = 250 g  =0.250 kg Molality (m)= mole of solute/mass of…

Q: Suggest a reasonable mechanism for the following. а.) R. R. -N NH2CHO R R HO b.) „Me Me -. Me Me…

A:

Q: of 10 ot in Progress oms of carbon are combined with 6.67 moles of hydrogen atoms

A: Given, Moles = 6.67 mol Moles of C = 6×6.67 mol

Q: Identify the major product/S of these reactions:

A:

Q: A 0.15mL of phenolphthalein indicator was dropped to 10.00mL of an unknown acid. Then, 52.00mL from…

A: Given: Volume of Phenolphthalein added = 0.15 mL Volume of Unknown acid = 10.00 mL Initial Volume of…

Q: Which of the following would be the correct Haworth projection for a-D-gulose: whose Fischer…

A: In this question, we will see the correct Haworth projection for the given Fischer projection of…

Q: weight of 1000.0 g mol- was used. What concentration of PEG is needed to create an aqueous solution…

A: In Osmosis, the osmotic pressure of a solution is the excess pressure that must be imparted to the…

Q: 5. Identify the major class of each lipid from its components. a. fatty acids + glycerol b. fatty…

A: Identify the major class of lipid :

Q: Which is the structure for the product POLY? H3C CH3 C=C Br H2C ROOR CH POLY H3C CH3 Br Br Br

A: Polymerization is defined as process in which relatively small molecules combine  to  produce very…

Q: The rate of the following reaction increases when the catalyst is added. 2SO3(g) = 2S02(g) + O2(g)…

A: In this question, we will see that given statement is right or wrong. How catalyst effect on the…

Q: Question 15 of 25 View Policies Current Attempt in Progress A mixture of gases contains 315 torr N2,…

A:

Q: . A straight horizontal pipe with a diameter of 1.0 cm and a length of 50 m carries oil with a…

A: Given as  Diameter of pipe=1.0cm length=50 m coefficient of viscosity=0.12 N.s/m2  Gauge pressure at…

Q: Determine whether each of the following compounds is optically active or optically inactive: WRITE…

A: Hello dear, welcome on bartleby;    Detailed explanation about above compounds is given in attached…

Q: Which of the following is expected to have the lowest surface tension in its liquid state? H H H.…

A: Surface tension of a liquid depend upon intermolecular force of attraction between molecules of…

Q: Using (a) the ideal gas law and (b) the van der Waals equation, calculate the pressure exerted by…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Which of the following does not support the First Law of Thermodynamics? O Dry-cell battery powers a…

A: In a flashlight, energy must move from the battery to the light source. However, every time energy…

Q: 2. The 4p radial wavefunction for the H-atom is (1/32/15) × R(20 - 10p + p²) x Z3/2 x ep/2 Using…

A:

Q: (i) CHCH, KOH |(i) H;O° Me2N.CHO РОСЬ `N' H |НСНО, Ме2NH H* SO3-Pyridine 100°C

A:

Q: for five acids are given be = 4.6 x 10-9 a= 1.2 x 107 a = 3.42 x 10 11 Fa = 7.0 x 10 2 %3 Ka = 6.6.…

A: Acidic strength is depend on Acid dissociation constant. As higher is the Ka ,lower is Acidic…

Q: 10. The figure shows a water tank with a valve. If the valve is opened, what is the maximum height…

A: Given :                Height = h = 10.0m                Length = L = 2.00m Angle in degree = θ =…

Q: Question 4 of 10 View Policies Current Attempt in Progress How many moles of H2 and N2 can be…

A:

Q: 4. Questions Q1: Does your aspirin smell like vinegar (acetic acid) after filtration? If yes, how…

A: The chemical formula of aspirin is acetylsalicylic acid

Q: e. The volume occupied by the gas is dependent on the amount of gas present in the container with…

A: the given statement is false

Q: Identify: a balloon expands when more air is introduced to it. This observation is consistent with…

A:

Q: Shown below are isomers of C,H14. Which of the following is expected to have the lowest viscosity in…

A: As the carbon chain length increase , the viscosity increases. Means longer chain have high…

Q: Arrange the following compounds in terms of their reactivity via electrophilic aromatic…

A:

Q: 0.4994 g sample of a hydrate of CuS04 xH20, is heated to a constant weight of 0.3184 g(total loss of…

A: