Geologists can estimate the age of rocks by their uranium-238 content. The decay of U-238 is first-order with a half-life of 4.5 billion years (4.5×109 yrs). A rock contains 47.3% of the initial amount of U-238 from when it was formed. How old is the rock?

Q: Draw the correct product for the reaction. (If there is no reaction, draw the starting material.) OH…

A:

Q: Lab Report Sheet: Part A: Determination of Mass Percent of Iron (Fe) Mass of evaporating dish and…

A: We need to set up the equations for Part A, B and C.

Q: 4. Select all that is considered spontaneous a. Cleaning your room b. A piece of bread molding after…

A: A spontaneous process is a process that occurs without the need for an external influence and…

Q: Beryllium-10 changes to boron-10 . write a balanced nuclear equation and identify the radiation…

A: Given ->  Beryllium-10 ----> Boron-10

Q: 1. CzH5OH(I) + HCOOH(I) → HCOOCzHs + H2O(I) 2. C₂H5OH(1)→ C₂H4(9) + H₂O(1) 3. C₂H4(9) + Cl₂(g) →…

A: In the multiple questions, we solve only first question according to the Bartleby guidelines. Check…

Q: Select all that apply. Sight down the C-2-C-3 bond, and choose the Newman projection formulas for…

A: We need to consider the dihedral angle between the methyl substituents and the H atoms to decide on…

Q: Use the chemical equation and table to answer the following question. HCI (aq) + NaOH (aq) --> NaCl…

A:

Q: 5. How does temperature affect entropy?

A: To determine the effect of temperature on entropy

Q: 1. Give the IUPAC name for the following structures: a. b. d. TY

A: we have to determine the IUPAC name of the given structures

Q: What is the by-product of the following reaction? NH₂ 8. + a. H₂O b. C.Hi C. H 10 i d. HO ii Select…

A: Identify the product and by-product of the following incomplete reaction.

Q: How many peaks are present in the NMR signal of each labeled proton? a. b. H. C. d. H H Br

A: Given Different organic compound

Q: When a solution is made... both the enthalpy (AHsoln) and the entropy (AS soln) of mixing are always…

A: The enthalpy of solution, also known as the heat of solution, is the amount of heat absorbed or…

Q: Can u help me with the question 2 for wrtie the fomula for each of the following ionic compounds:…

A: Given : name of compounds

Q: What is the correct name of the compound below? gl

A: Rule of IUPAC- 1) Choose the longest carbon chain as parent chain. 2) Numbering start from those…

Q: Calculate the wavelength of light with an energy of 5.22 × J O 1.27 × 10-15 m O 2.38 × 1021 m O…

A:

Q: In which of the following organic solvents do you expect glucose to be most soluble? The structure…

A: we have to select the compound in which glucose is most soluble

Q: If you have 10 mL of liquid carvone with a density of 0.96 g/mL, how many grams will that be?

A:

Q: How can this IR graph of the crude product be

A: To explain: Whether the given IR graph of the crude product be the evidence of the proof that the…

Q: Consider the following two reactions and the corresponding enthalpy changes: CH4(g) +2 O₂(g)-CO₂(g)…

A: we have to determine the heat released or absorbed for combustion of 1 mole of methane

Q: 1A H 2A Li Be Na Mg 3B 4B 5B 6B 7B8B K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn 1B 2B 8A 3A 4A 5A 6A 7A He B…

A: The electronic configuration can be written by using three rules : Aufbau principle The Pauli's…

Q: Enter your answer in the provided box. Determine the percent sulfuric acid by mass of a 1.21 m…

A:

Q: 2. Draw the major organic products for the following reactions: a. b. с. e H3C d. H3C H3C f h H3C i…

A:

Q: This graph shows how the vapor pressure of three liquids varies with temperature: vapor pressure,…

A: The liquid having the highest vapour pressure at the same temperature is the most volatile.  Boiling…

Q: When a small amount of water is added to t-butyl, what happens to the cooling curve for this new…

A: Colligative properties are properties of a solution that depend on the concentration of solute…

Q: i Add the missing curved arrow notation.

A: Curved arrows show the flow of electron or electrons during bond breaking and/or bond making…

Q: When a solution is made from 47.8 g of an unknown nonelectrolyte dissolved in 151.4 g of solvent,…

A: Given: mass of non-electrolyte = 47.8 g mass of solvent = 151.4 g = 0.1514 Kg Elevation in boiling…

Q: What is the IUPAC name of the following bicycloalkane?

A: Bicyclic alkanes are named using the IUPAC (International Union of Pure and Applied Chemistry)…

Q: you have a solid mixture that contains lithium bromide and barium carbonate. use the handbook of…

A: There are several methods to separate chemical compounds, including:  Distillation: used to separate…

Q: Which is a product of this reaction according to the arrows? All lone pairs and formal charges are…

A:

Q: There are two four-carbon branched-chain alkane constitutional isomers True or false

A: Answer: Two compounds having same molecular formula but different structural formulas are called as…

Q: Knowing that the molar heat capacity at constant pressure of CO₂ has the form Cp,m = (a + b + c/T²)…

A: Answer: In this question we have to use the relation between heat exchange and molar heat capacity…

Q: Glycerin (C3H8O3) is a nonvolatile nonelectrolyte with a density of 1.26 g/mL at 25 °C. Calculate…

A:

Q: Density of an element is 3.95g/cm^3 Express it in lb / ft^ 3 1lb.=453g 1cm^3 = 1 ml 1 inch = 2.54cm…

A: Given data, Density of element = 3.95 g/cm3 1 inch = 2.54 cm Taking cube on both sides, we get (1…

Q: What are some general and specific implications of using titrations to identify unknown acids?

A: Titration is a laboratory technique used to determine the concentration of a solution of known…

Q: Use 2-3 complete sentences to define reactant orders in rate laws and what they tell us about tant.

A: The rate law of a reaction is an equation that describes how the rate of a reaction is affected by…

Q: e) d) 6. Label each pair of compounds as Cis-Trans isomers (Diasteroemers), Constitutional Isomers,…

A:

Q: 6) A particular reaction has the following rate constant at different temperatures: Temperature (°C)…

A: We now the Arrhenius equation for activation energy determination.  ln(k2/k1) = Ea/R x (1/T1 - 1/T2)…

Q: I get using the Arrhenius equation but even after calculating the e-[82.64 KJ/mol)/(8.314 J/mol.K ×…

A: During putting the value to get the value of exponential part you have to put the value of…

Q: Which of the following substances is most soluble in H2O? (a) C10H8(s) (b) NH2OH(s) (c) C6H6(l) (d)…

A: This question is related to solubility concept. Here, the rule "like dissolves like" would be…

Q: What is the mass of 2.94 x 10 22 atoms of copper? 3.10 g 0.031 g 0.31 g 31.0 g

A: Given -> Number of atoms of Cu  = 2.94 × 1022

Q: For many purposes we can treat ammonia (NH3) as an ideal gas at temperatures above its boiling point…

A:

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) + O₂(g) → 2PbO(s)…

A: Recall the given reactions,                          1 2 Pb s  +  O2 g  →  2 PbO s…

Q: Convert the concentration below to mM and uM: 154.5mg of sucrose (Formula Weight: 342.30g/mole) per…

A: In this question, we will convert concentration unit M ( Molarity ) to mM and uM  Given that,  Mass…

Q: A flask contains a mixture of two gases: NO2 and Ne. The flask holds 0.519 mol of NO2 and an unknown…

A:

Q: If 0.480 mol of N₂ (g) and 1.60 mol of H₂ (g) were placed in a 4.50 L container and underwent the…

A: Expression for the equilibrium constant for the given reaction is as follows: N2g + 3H2g  ⇌ 2NH3gKc…

Q: a) SO₂ gas at a pressure of 7.50 atm is heated from 0.0°C to 481 °C and is simultaneously compressed…

A:

Q: Which is a product of this reaction according to the arrows? All lone pairs and formal charges are…

A: Nucleophilic substitution is a type of chemical reaction in which a nucleophile, a molecule with a…

Q: 4) Give the IUPAC name for each alcohol and classify it as Primary, Secondary, or Tertiary A) CH…

A: IUPAC Rules for naming an Organic compound: The longest possible continuous carbon chain is…

Q: Give the complete electronic configuration for Mn²+ and V4+.

A: Electronic configuration refers to the arrangement of electrons in an atom or ion. It is a way of…

Q: At pI for the amino acid glycine, NH2CH2COOH, using the chemical formula of the molecule, please…

A: The pI (isoelectric point) of an amino acid refers to the pH at which the amino acid has a net zero…