A sample of ore containing radioactive strontium 38 Sr 90 has an activity of 6.5 × 105 Bq. The atomic mass of strontium is 89.908 u, and its half-life is 29.3 yr (1 yr = 3.156 × 107 s). How many grams of strontium are in the sample? Number i 1.8025E13 Units g

Q: help please?

A: Approach to solving the question: Detailed explanation: Examples: Key references:

Q: In the following molecule, what is the H-C-C bond angle for carbon b and  what is the O=C-O bond…

A: The molecule provided is most likely cinnamaldehyde, the major component of cinnamon oil.  The H-C-C…

Q: Draw the two major products of this reaction. Use a dash or wedge bond to indicate the…

A: Here are the two major products of the reaction, with stereochemistry indicated using dash and wedge…

Q: 16

A: I tried my best to make you understand but still if any further doubt regarding the mechanism of the…

Q: Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product…

A: Step 1: Step 2: Step 3: Step 4:

Q: Please help

A: 2. Tollens' reagent is commonly used to test for the presence of aldehydes but does not typically…

Q: Please help with NMR and Integration!!!

A:

Q: Propose a mechanism for the following transformation: O 1) Excess LiAlH4 HO OH 0. 2) H₂O

A: Approach to solving the question: Detailed explanation: Examples: Key references:

Q: For the following equilibrium system,CO; (g) + Ca(OH)2(s) = CaCO (s) + H2O(1) + HeatAH = -113 kJ a.…

A: ### Reaction:CO2(g) + Ca(OH)2(s) → CaCO3(s) + H2O(l) + HeatΔH = -113 kJThis reaction is exothermic…

Q: dont provide hnadwriting solutio .....

A: The formation of 1-(cyclopent-1-en-1-yl)cyclopent-1-ene is favored over the reformation of…

Q: Enter electrons as e. Use smallest possible integer coefficients. If a box is not needed, leave it…

A: 1.Step 1: Recall that if the standard cell potential (Ecell∘) must be positive for the reaction to…

Q: How many mL of 1.3 % mL m (7) AICI, solution would contain 7.1 g of aluminum chloride? Round your…

A: Approach to solving the question:Please see attached photos for detailed solutions. Thank you.…

Q: Please don't provide handwritten solution ....

A:

Q: None

A: The nuclear reaction is balanced if and only if the total mass number of all reactants is equal to…

Q: Calculate the mass of potassium hydrogen phthalate that is needed to neutralize 25.0 mLof 0.100 M…

A: The objective of this question is to calculate the mass of potassium hydrogen phthalate (KHP) needed…

Q: 33. Platinum crystallizes with the face-centered cubic unit cell. The radius of a platinum atom is…

A: The relation between the radius of an FCC crystal unit cell to its edge length is 4R=2​a where R is…

Q: Label the major peaks, especially those those related to fumaric acid

A: 1 corresponding to C-H bond vibration. 2 corresponding to O-H vibration. 3&4 corresponding to…

Q: Which of the following statements is true concerning the hypothetical electrochemical cell depicted…

A: The objective of the question is to determine the correct statement about the hypothetical…

Q: CH Bra ? Modify the given carbon skeleton to draw the major product(s) of the given reaction. If a…

A: The reaction between ethenylcyclohexane and Br2 proceeds via an electrophilic addition mechanism.…

Q: 7. Copper metal crystallizes in a face-centred cubic structure. If the atomic radius of copper is 64…

A: The objective of this question is to calculate the volume of a unit cell of copper, which…

Q: When the following equation is balanced properly under basic conditions, what are the coefficients o…

A:

Q: The solubility of Zn(OH)2 in water at 25 °C is measured to be 4.2 × 101 Round your answer to 2…

A: Step 1: Given solubility =4.2*10-4​​​​​-4g/L Molar solubility (s)=[solubility/ gram molecular…

Q: Please help me with the question below. A detailed explanation to aid in understanding is welcome.

A: Step 1: Step 2: Step 3: Step 4:

Q: Please help understand this I’m having a hard time understanding

A: Step 1: Step 2:lamda and delta are optical isomers.Step 3: Step 4:

Q: A boat heads in the direction N 79 deg E. The speed of the boat relative to the water is 25 mi/h.…

A: Step 1: velocity of the boat relative to the water. Step 2: speed of the water and the true speed of…

Q: Calculate AS° for Substance C (g) H₂ (g) 2 CH₁ (g) 4 C(g) + 2 H2(g) → CH(g). S° (J/mol.K) 158.1…

A: The objective of the question is to calculate the standard entropy change (ΔS°) for the given…

Q: Give Product Na OE t E+ OH

A: In organic chemistry, a carbonyl-containing compound undergoes condensation reaction in which one…

Q: None

A: FOR ANY QUERIES, PING ME     HAPPY LEARNING

Q: Which of the following determines the primary structure of both DNA and RNA? O the sequence of…

A: The primary structure of nucleic acid is defined as the sequence of nucleotides written from the 5'…

Q: Identify unknown diatomic gas that filled a gas-tight cylinder to 33.5 mL, at pressure of 2.41 atm…

A:

Q: A galvanic cell is powered by the following redox reaction: 3+ 4 Fe (aq) + N₂H(aq) + 4OH (aq) → 4…

A: Step 1: At cathode reduction takes place.4Fe3+(aq)+4e−→4Fe2+(aq)Eo=0.771 V Step 2: At anode…

Q: None

A: The general equation for an acid dissociation reaction is, HA(aq)​⇌H(aq)+​+A(aq)−​ A stronger acid…

Q: Calculate the lattice energy of magnesium sulfide Mg(s) → Mg(g) Mg(g) → Mg2+(g) + 2 e- S8(s) → 8…

A: We can solve for the lattice energy of Magnesium Sulfide using the Hess Law.Step 1: Label each…

Q: Calculate the numerical value of 2s for hydrogen at r = 0, r = a,, r = 2a,, r = 3a, and r = 00 1…

A:

Q: Please answer the question in the image. Thanks.

A: Based on the provided evidence, we can determine the primary sequence of oxytocin as…

Q: Which one of the following is not a valid expression for the reaction below? 4NH3 + 702 → 4NO2 +…

A: The objective of the question is to identify the invalid expression for the reaction rate in the…

Q: H i H 1.OHE 2-Br-Br Haloform Reaction Reaction 4

A: Approach to solving the question: Detailed explanation: Examples: Key references:

Q: 2. a-pinene is one of the constituents of turpentine. It can be found in many essential oils, such…

A:

Q: Which statement BEST describes why the sugar phosphate nucleic acid backbone is on the outer part of…

A: This arrangement maximizes the interactions between the hydrophilic sugar-phosphate backbone and the…

Q: Use the standard reduction potentials given below to predict if a reaction will occur when Fe metal…

A: 1.Step 1: A redox reaction is spontaneous when the value of the standard cell potential (Ecell°) is…

Q: reaction conditions and follow the curved arrows and draw the intermediate and product in this…

A:

Q: Need help please and thank you

A:

Q: Provide the correct IUPAC name for WO2.

A: O                                           ||In organic chemistry, R—C—R' group is known as the…

Q: Question 5 Describe the mechanism of the following reaction and replace the R groups with groups…

A: Step 1: Step 2: Step 3: Step 4:

Q: 16) a-Calculate the pH of a 0.0000465 M HCl solution. Be sure your answer has the correct number of…

A:

Q: 1. In aqueous solution, [Co(CN),C1]³ hydrolyses according to: [Co(CN), Cl]³¯ + H₂O → [Co(CN)…

A: Given:- Reaction: [Co(CN)₅Cl]³⁻ + H₂O → [Co(CN)₅(H₂O)]²⁻ + Cl⁻- Rate = k₁[Co(CN)₅Cl³⁻] +…

Q: help please?!!?!?!

A: Approach to solving the question: Detailed explanation: Examples: Key references:

Q: A novel new method of peptide synthesis involves formation of an amide bond by reaction of an a-keto…

A: Step 1: Step 2: Step 3: Step 4:

Q: None

A: Step 1:R and S configurations:It is a nomenclature system in organic chemistry that helps in…

Q: 8 1/1 point A student sets up an electrochemical cell given by the following line notation: Which is…

A: Cell notation is a shorthand nomenclature developed to represent the components and reactions taking…