A 93.6 g sample of ground water is found to have a lead concentration of 15.65 ppm. Calculate the mass of lead in the sampl in milligrams. mass: mg

Q: Which set is the correct coefficients for the following equations:Ag2O ------ Ag + O2 1, 1, 2 2, 2,…

A: The reaction given is, => Ag2O -------> Ag + O2

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: TASK 2: BALANCING! Balance the following redox reactions by the oxidation number method and…

A:

Q: a. 1.20 V. b. 1.21 V. c. 0.35 V - the correct answer is c., I just don't how to get to the answer.…

A: You know the reaction and reduction potentials of each half-cell reaction.If you make a cell, the…

Q: What will prevent iron from interfering with the aluminum measurements?

A: To prevent iron from interfering with the aluminum measurements, it is important to use a suitable…

Q: help please answer in text form with proper workings and explanation for each and every part and…

A: Approach to solving the question: I hope this helps! Detailed explanation: Examples: Key references:

Q: in a laboratory 250 ml of Potassium chloride (KCl) solution with concentration 0,005 mol/l is needed…

A: 250 mL of 0.005 mole/L KCl solution is prepared from a stock solution, having a concentration of 0.1…

Q: O a. Students cannot put a chemical directly on the balance pan. O b. Solid waste can be disposed in…

A: Solid waste can not be disposed in the sink because this could be a reason of water pollution. Some…

Q: What is the cell potential in V? Voltmeter Na,SO,(aq) Cu Cu 0.025 M CUSO,(aq) 1.50 M CUSO,(aq)

A:

Q: A salt unknown containing ferrous ion was dissolved and diluted to 407.8 mL. A 47.56- mL aliquot of…

A: Given : Cf = 0.6961 M Vf = 16.34 ml M  = 5 mol Va  = 47.56 ml   Finds :  To calculate Mass of iron…

Q: Resistance of 0.2 M solution of an electrolyte is 50 0. The specific conductance of the solution is…

A: GivenSpecific Conductance = κ = 1.3 Sm-1Given resistance = 50 ohmκ = 1R× cell constant1.3 Sm-1 = 150…

Q: Three test tubes are collected with the same type of acid (6M HCT) and within each test tube one of…

A: The rate of a chemical reaction is given by:

Q: Evaporation is a __________________________________. Evidence - Explanation - Iron…

A: Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: 1. Showing all calculations, determine the mass of copper in the Cu(NH3)4SO4 • H2O you made.…

A: Given: The mass of Cu(NH3)4SO4.H2O = 1.5787 g. The molar mass of Cu(NH3)4SO4.H2O = 245.79712 g/mol.…

Q: Balance the equations by inserting coefficients as needed. equation 1: ZnO + CO → Zn + CO₂ Incorrect…

A: Here there are 2 equations given.Zinc Oxide + Carbon Monoxide = Zinc + Carbon DioxideSulfur Dioxide…

Q: Suppose i want to prepare 1 litter of bike or car washing shampoo, now for increasing the shininess…

A: A shampoo is a hair care product that is designed to clean hair and scalp. It is typically a viscous…

Q: Use the provided graph paper to construct a Beer's Law plot: absorbance versus concentration. Draw a…

A:

Q: What is the oxidation state of iron in K4Fe(CN)6? O a 2+ Ob 4+ Oc. 6+ Od 3+

A: Oxidation number of a neutral  molecule is always zero. Using this concept, we can determine the…

Q: Balance the equation in acidic conditions. Phases are optional. equation: Cu + NO3 → Cu2+ + NO

A:

Q: . Determine the mass of KMnO4 required to make 80mL of N/8 KMnO4 when the final solution is used to…

A:

Q: +Table 2. Iron ore and cerium solution data. Flask Flask Flask 1 3 Iron ore mass, g: 0.105…

A: Given: The concentration of standard Ce(SO4)2 solution is 0.0362 M. The mass of iron ore taken in…

Q: Determination of Sulfates in water (Analysis) Materials / Equipment needed Standard Methods…

A: Determination of sulfates in water in water. In water various types of contaminants available and…

Q: Calculate the sum of coefficients for the following equation balanced for acidic conditions.…

A: Given,The reaction equation:

Q: B. AG = AH -TAS D. E mc2 4. What do you need to consider when looking for enthalpy value of a…

A:

Q: Match with correct  a. Single displacement  b. Synthesis  c. Combustion  d. Decomposition  e. Double…

A:

Q: DATA TABLE A. Conductivity Testing-Evidence for Ions in Aqueous Solution Solution LIOH(aq) HNO₂(aq)…

A: Concept based on the conductivity of the solutions in ionized state and non-ionized state, solid…

Q: Balance the following redox reactions by supplying the correct whole number coefficients before each…

A: (a) K2Cr2O7 + FeSO4 + H2SO4 → Cr2(SO4)3 + Fe2(SO4)3 + K2SO4 + H2O (b) HNO3 + H2S → S + NO + H2O (c)…

Q: 1. The Fe2+ content of iron tablets was determined by titration with a freshly standardised solution…

A: In order to prepare a sensible titre, the solution should have concentration similar to that of the…

Q: QUESTION 1 Which of the following reactions would be suitable for analysis by conductometry? (Select…

A: Conductometry analysis is analysis of reaction progress depending upon the conductance measurements.…

Q: give the coefficient of permanganate in the balanced equation. ___ SO2   +   ___ MnO4–    +   ___…

A: We have to Balance the equation by oxidation method

Q: In an electrolytic cell, the short, thick side of the power supply symbol is... Short, Long, Thick…

A: Remember this is an electrolytic cell not galvanic cell.

Q: Balance Na2Cr2O7 + KI + H2SO4 = Na2SO4 + K2SO4 + Cr2(SO4)3 + I2 + H2O using the half reaction method…

A: Given chemical equation Na2Cr2O7 + KI + H2SO4 --------> Na2SO4 + K2SO4 +Cr2(SO4)3 +  I2 + H2O…

Q: Can storing batteries in a cold place, such as a refrigerator or freezer, help prolong its life?…

A: A question based on electrochemical cells that is to be accomplished.

Q: LEFT silver (Ag) silver silver RIGHT copper (Cu) zinc (Zn) magnesium (Mg) VOLTAGE +0.43 +1.53 +3.15…

A: This is a example of redox reaction that is oxidation and reduction process occurs simultaneously.…

Q: 2Ag*(aq) + Zn(s) → 2Ag (s) Zn2*(aq) CLEAR ALL

A: As we know,  oxidation is takes place at anode while reduction is takes place at cathode.  Higher…

Q: (a) Balance the following using the half reaction method. PO33-+ CIO4 =PO43-+ Cl" ...in base

A: Since you have posted multiple questions, we are entitled to answer the first only. a) The reaction…

Q: Which is the reducing agent in the combustion of methanol? CH3OH+02 H₂O + CO₂ O a) 0₂ Ob) H₂0 c)…

A: Oxidation: It involves loss of electrons  Or Increase in the oxidation number. Or Addition of oxygen…

Q: 3. Voltammetry is limited to analysis of inorganic samples only.

A: Voltammetry is an analytical technique in which a species is identified and its concentration is…

Q: When H₂SO3 + MnO4 → SO42- + Mn2+ (acidic solution) is balanced, the sum of all coefficients is: A:…

A: Hint is given as the reaction takes place in the acidic medium. The reaction to be balanced by using…

Q: )K.CrO CHO (+6) + 6e → 2Cr (+3) g wt K-CrOr g/mol = 49.03 g/eq %3D %3D 6 eq/mol HOz (as an HOz -1) +…

A: Which molecules decrease oxidation no. called Oxidizing Agent Which molecules increase oxidation no.…

Q: Whate is primary standarde

A: Primary standard- In chemistry, primary standard is a reagent whose concentration is known. Primary…

Q: Instruction Identify the type of analysis based on the description. More than answer is possible. 1.…

A: 1) L-ascorbic acid 500 medication contains L-ascorbic acid otherwise called ascorbic corrosive as a…

Q: Jorge was given an equation and told to predict the products. Her teacher marked her answer wrong.…

A: The values of the reduction potential of the given metals are as follows: The reduction potential…

Q: reduce impurities?

A: In this question we have to explain that what are other recommendations to reduce impurities in…

Q: 1. A chemist adds 1.50 g of silver nitrate to 1.000L of waler. silver nitrate dissolves completely.…

A: Limiting reactant - The reactant that is present in lesser amount than required will be a limiting…

Q: 8. The conductivity of a saturated solution of BaSO4 at 298 K is found to be 4.20 x 10-6 S cml. The…

A: The molar solubility of a saturated solution of a salt is given by the following formula: Molar…

Q: 2. Balance the following equation: BaSO4     +     NiCl4     ------>    BaCl2      +      Ni(SO4)2…

A: Answer:- This question is answered by using the simple concept of balancing a chemical equation…