Chemistry
- The electron configuration can also be represented by writing the symbol for the occupied subshell and adding a superscript to indicate the number of electrons in that subshell. For example, consider a carbon atom having an atomic number of 6. The total number of electrons in a neutral carbon atom is 6. The electron configuration of the carbon atom represented by the orbital diagram is This electron configuration can be written as 1s22s22p2 Use the rules for determining electron configurations to write the electron configuration for P . Express your answer in complete form in order of increasing orbital energy. For example, 1s22s2 should be entered as 1s^22s^2.
- Which of the following solutions will have the highest concentration of chloride ions? Which of the following solutions will have the highest concentration of chloride ions? 0.10 M MgCl2 0.10 M AlCl3 0.05 M CaCl2 0.10 M LiCl All of these solutions have the same concentration of chloride ions.
- Which reaction below represents the first ionization of O?a. O(g) + e- → O-(g)b. O+(g) + e- → O(g)c. O(g) → O+(g) + e-d. O-(g) + e- → O2-(g)e. O-(g) → O(g) + e-
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NO−3(aq)+4H+(aq)+3e−→NO(g)+2H2O(l)E∘=0.96V ClO2(g)+e−→ClO2−(aq)E∘=0.95V Cu2+(aq)+2e−→Cu(s)E∘=0.34V 2H+(aq)+2e−→H2(g)E∘=0.00V Pb2+(aq)+2e−→Pb(s)E∘=−0.13V Fe2+(aq)+2e−→Fe(s)E∘=−0.45V Part A Use appropriate data to calculate E∘cell for the reaction. 3Cu(s)+2NO−3(aq)+8H+(aq)→3Cu2+(aq)+2NO(g)+4H2O(l)
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Subject:
Chemistry -
Author:
jaidyncopeland -
Created:
1 year ago
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- Which of the following correctly provides the name of the element, the symbol for the ion, and the name of the ion?a) fluorine, F, fluoride ionb) sulfur, S, sulfurous ionc) copper, Cu, cuprous iond) zinc, Zn, zincate ion
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A concentration cell consists of two Sn/Sn2+ half-cells. The cell has a potential of 0.10 V at 25 ºC. What is the ratio of the Sn2+ concentrations in the two half-cells?
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Subject:
Chemistry -
Author:
hezekiahgood -
Created:
1 year ago
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- Draw a Lewis structure for H2O that obeys the octet rule if possible and answer the following questions based on your drawing. 1. For the central oxygen atom:
- Complete the following two statements regarding quantum-mechanical concepts associated with the Bohr model of the atom and refinements that resulted from the wave-mechanical atomic model. " Two important quantum-mechanical concepts associated with the Bohr model of the atom are that electrons are particles moving in _______ Enter your answer for the missing word between words "moving in" and "orbitals" in accordance to the question statement discrete orbitals, and electron energy is quantized into Enter your answer for the missing word after words "quantized in" in accordance to the question statement levels . (b) Two important refinements resulting from the wave-mechanical atomic model are that the electron position is described in terms of a Enter your answer for the missing words after words "in terms of a" in accordance to the question statement electron cloud , and electron energy is quantized into both shells and subshells--each electron is characterized by Enter your answer for the missing word after words "is characterized by" in accordance to the question statement quantum numbers."
- Hydroxyl radicals react with and eliminate many atmospheric pollutants. However, the hydroxyl radical does not clean up everything. For example, chlorofluorocarbons, which destroy stratospheric ozone, are not attacked by the hydroxyl radical. Consider the hypothetical reaction by which the hydroxyl radical might react with a chlorofluorocarbon: OH(g)+CF2Cl2(g)→HOF(g)+CFCl2(g) Use bond energies to explain why this reaction is improbable. Calculate ΔHrxn of this reaction.
- When ethanol, C2H5OH (a component in some gasoline mixtures) is burned in air, one molecule of ethanol combines with three oxygen molecules to form two CO2 molecules and three H2O molecules. A) Write the balanced chemical equation for the reaction described. B) How many molecules of CO2 and H2O would be produced when 2 molecules ethanol are consumed? Equation? C) How many H2O molecules are formed, then 9 O2 molecules are consumed? What conversion factor did you use? Explain! D) If 15 ethanol molecules react, how many molecules O2 must also react? What conversion factor did you use? Explain!
- Draw structural formulas for the major organic product(s) of the reaction shown below.• You do not have to consider stereochemistry.If no reaction occurs, draw the organic starting material.Remember to include all of the formal charges on the atoms of any nitro groups.
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How many moles are in 123.0 grams of KClO4? (3 points)
0.2354 mol KClO4
0.6445 mol KClO4
0.7124 mol KClO4
0.8878 mol KClO4
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Subject:
Chemistry -
Author:
dontemcfarland -
Created:
1 year ago
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Explain why laboratory safety rules are important.
it's for a essay please help!!!!!!
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Subject:
Chemistry -
Author:
joselynnunez -
Created:
1 year ago
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- the ph of a naoh solution is 12.05. what is the concentration of [oh-] of the naoh solution? express your answer in standard notation
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write an ionic half equation for the formation of hydrogen during this electrolysis
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Subject:
Chemistry -
Author:
presleymeza -
Created:
1 year ago
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- Explain what a conjugate acid is and what a conjugate base is.
- Based on Table F, which compound is least soluble in water? 1. AIPO4 2. Li2SO4 3. Ca(OH)2 4. AgC₂H₂O2
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Describe the three values in a learner-centred curriculum that a teacher can useto create a pedagogy of care in the classroom.
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Subject:
Chemistry -
Author:
damionchristian -
Created:
2 years ago
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- What kind of reaction is the equation? Zn(s) + 2HCl(aq) → ZnCl2 (aq) + H2(g) + heat
- What is 254 nm in meters? Submit answer in scientific notation using the format 0.00x10^0 (e.g. 0.000123 = 1.23x10^-4). Omit units and spaces.\nWhat is the frequency of this irradiation? (Answer from question 1) Submit answer in scientific notation using the format 0.00 x 10^0 (e.g. 0.000123 = 1.23 x 10^-4). Omit units and spaces.
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If you have 10,000 grams of a substance that decays with a half-life of 14 days, then how much will you have after 42 days?
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Subject:
Chemistry -
Author:
winstonoblt -
Created:
1 year ago
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If you took a cross-section of soil from your backyard, what would be the correct order of soil layers from top to bottom? parent rock, subsoil, topsoil, humus topsoil, humus, subsoil, parent rock humus, topsoil, subsoil, parent rock, subsoil, hummus, topsoil
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Subject:
Chemistry -
Author:
bradleyne2n -
Created:
1 year ago
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How can you determine whether a linear binomial is a factor of a polynomial without using the remainder theorem?
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Subject:
Chemistry -
Author:
charliepruitt -
Created:
1 year ago
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Question 5 of 10
Platinum has a density of 21 g/cm³. A platinum ring is placed in a graduated
cylinder that contains water. The water level rises from 4.0 mL to 4.2 mL
when the ring is added. What is the mass of the ring?
A. 2.6 g
OB. 3.8 g
OC. 4.2 g
OD. 5.2 g
B
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Subject:
Chemistry -
Author:
emmaleesloan -
Created:
1 year ago
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xcc of 5N HCL was diluted to 1 litre of normal solution calculate the value of x
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Subject:
Chemistry -
Author:
deannaatkinson -
Created:
1 year ago
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