What contribution was made by Sir William Crookes and why was this important for later discoveries about the atom?

Q: River water analysis of mercury (Hg) yields a spectrophotometric sample signal of 0.712 for a 5.00…

A: Before the addition of the spike, 5.00 mL of the river water sample gives an absorbance of 0.712.…

Q: 1. For the following rate law... Rate = K[NO₂]²[H₂] a. What is the order with respect to each…

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Q: You ran the following reaction in the lab. Given the following results. Around what time was the…

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Q: For you what are some of the weirdest scientific experiments ever done? And what are some of the…

A: Write an invisible message on a mirror using a soapy solution and a cotton swab. The secret message…

Q: What is the strongest form of intermolecular interaction possible for propan-2-ol? O dispersive (van…

A: (10) Rf value: Rf value can be determined by the ratio of the distance which can be traveled by the…

Q: points A 0.1938 g of an organic compound known to contain C and H only was burned. The traps for H2O…

A: molar mass of CO2 = 44 g/mol  moles of CO2 = 0.5972 g /44 g/mol = 0.0136 moles CO2 mole ratio of…

Q: Find the number of moles of water that can be formed if you have 194 mol of hydrogen gas and 92 mol…

A: 194 mol of hydrogen gas and 92 mol of oxygen gas gives 'n' moles of water.  Number of moles (n) of…

Q: 6. Calculate the uncertainty in the speed of a ball of mass 500 g that is known to be within 1.0 um…

A: According to Heisenberg uncertainty principle,  del X . del Px = h/4π Or, X . mv = h/4π Or, v =…

Q: One brand of laundry bleach is an aqueous solution 4.55 % NaOCl by mass. What is the molarity of…

A: Molarity is defined as number of moles of solute divide by volume of solution in liter

Q: For the following reaction, 19.4 grams of sodium chloride are allowed to react with 59.8 grams of…

A: Limiting reactant :-  A reactant which is present in lesser number of moles than required as per…

Q: At a certain temperature this reaction follows first-order kinetics with a rate constant of 0.0156…

A: First-order reaction: The rate of the first-order reaction depends only on one reactant. According…

Q: What is the structure of the IUPAC name? Draw the structure and give how many carbons are on the…

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Q: 4- The unit cell of 52Cr²4 metal is BCC, if the density of Cr= 7.19 Mg/m³; determine the lattice…

A: Here we have to use the formula to calculate the density of unit cell, through which we can…

Q: When using a volumetric flask, is it important to prepare solutions at room temperature? a.It's not…

A: The Answer of he following question is- The volumetric flask is a thin-necked pear-shaped…

Q: List the important products of the Chlor-alkali process. Write one important use of each.

A: Organic chemistry is a branch of chemistry in which we deal with organic reactants and products. We…

Q: A 0.334-g sample of naphthalene (C₁0Hg) is burned in a bomb calorimeter and the temperature…

A: we have to calculate the heat of combustion for burning 0.334 g naphthalene

Q: Determine the temperature of a reaction if K = 1.20 x 106 when AG° = +21.00 kJ/mol.

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Q: Determine the elemental percentages of all elements in C7H12CuO2. Enter your answer to two decimal…

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Q: What is the IUPAC name for the following molecule? Question 9 What is the IUPAC name for the…

A: To answer:  What is the IUPAC nomenclature of the following molecules?

Q: 2. A solution made by adding 1.63 g of K₂S (MM=110.3 g/mol) to 10.0 mL of H₂O has a volume at 20°C…

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Q: Determine the empirical formula (in the format CxHyO₂) for a compound with 40.00% C, 6.71% H and…

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Q: H₂C-C- 一房一房一角 NH

A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix)    Note :-…

Q: The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3.…

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

Q: Write the electron configuration for cobalt (atomic number 27).

A: Electronic configuration- The total number of electrons present in an atom having s,p,d,f  subshells…

Q: Question 2 You are trying to maximize yield in the following reaction. Give three ways that you can…

A: We are given a reaction at equilibrium and we need to discuss what changes to be done on equilibrium…

Q: инг осH 3 olt СН3 с. d. он NO NO 2 сиз

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Q: 5) Draw the lowest energy (most stable chair conformation) of 4-isopropyl-1,2-dimethylcyclohexane.…

A: Most stable chair form have lowest energy among all the structures.

Q: For the following reaction, 4.50 grams of carbon dioxide are mixed with excess potassium hydroxide.…

A: Mass of CO2= 4.50 gm  Actual yield=  11.4 gm  Calculale theoretical yield= ? Calculate % yield= ?

Q: Once the reaction has reached completion, what amount (in moles) of the excess reactant is left?…

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Q: what would you expect to happen if sodium methoxide were added to water ? Write the equation?

A: Reactants are present on left hand side of reaction and products  are present on right  hand side of…

Q: 3. How many mL of ethyl alcohol can be distilled from 1.5 L of a 90 proof wine?

A: Given the concentration of wine = 90 proof  volume of wine taken = 1.5 L  1 L = 1000 mL  =>…

Q: 75.0 mL of water was added to 100.0 mL of 0.250 M CaCl₂ solution. Assume the volumes are additive.…

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Q: b. How many total atoms are there in a body-centered cubic cell? Answer:

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Q: Determine the kinds of intermolecular forces present in each element or compound. N2 CO CCl4 NCl3…

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Q: Write the chemical formula for the binary ionic compound that will form when calcium and phosphorous…

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Q: Listen The pH of a solution of 0.04 M HCI is: 4 1.4 0.4 0.04 The pH cannot be determined Question 4…

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

Q: For a free electron, calculate the density of quantum states (#/cm³) over the energy range of (a) 0…

A: The quantum state density is given by the following equation:N=4π2m32h3∫EdE where N = density of…

Q: In some of these numbered processes, particle energy is gained, and in some it is lost. In which of…

A: To solve this problem we will use the given image of state of matter .

Q: 4. Calculate the average and the standard deviation for the following data: Volume Water at 20°C, mL…

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Q: What mass of MgCl2 is required to prepare 500.0 mL of 0.100 M solution?

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Q: 1. How many GRAMS of chromium(III) nitrite are present in 2.18 moles of this compound ? grams. 2.…

A: 1.) To calculate mass in grams from moles, we use the formula :  Mass = Moles × Molar mass  2.) To…

Q: Calculate the density of a solid with mass 27.16g. The solid was placed in a measuring cylinder…

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Q: You are running a CC with a mixture of the following compounds: A OH #2 B OH Organize the compounds…

A: CC means coloum chromatography

Q: What volume of a 0.0100 M silver nitrate would be required to precipitate all of the iodide in 200.0…

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Q: Identify the most acidic proton in the compound: d e 0: a b C d e b e

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Q: Use the References to access important values if needed for this question. Does a reaction occur…

A: Here, we have to find whether a reaction will occur or not when aqueous solutions of chromium(III)…

Q: How much water must be added to 100.0 mL of 0.450 M HCl to obtain a 0.175 M solution of HCl?

A: First we would calculate the total volume of 0.175 M solution that can be made using the 100.0 mL…

Q: liquid hexame [CH₂ (CH₂) y CH3] reacts with gaseous oxygen gas (0₂) to proderce CO₂ and gaseous…

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Q: A closed container holding neon is initially in 56.2 L at STP conditions. The neon is compressed to…

A: A closed container holding neon is initially in 56.2 L at STP conditions. The neon is compressed to…

Q: If the volume of a gas in a closed container at constant temperature is doubled, what will happen to…

A: Boyle's Law :-  It states that, for a fixed mass of gas at constant temperature the pressure is…

Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.