Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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fill in the blank question nuclear reactions produce more energy per un…
chemical
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fill in the blank question nuclear reactions produce more energy per un…
chemical
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multiple - choice question what noble gas would be used for the noble g…
A. neon
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what family number(s) is/are the noble gases. there may be more than on…
A. 18 D. VIIIA
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12. use the steady state approximation to derive a rate law for the fol…
The derived rate law is $r=\frac{k_1k_2[O_3]^2}{k_{ - 1}[O_2]+k_2[O_3]}$. When $k_{ - 1}[O_2]\gg k_2[O_3]$, the observed rate law $r = k\frac{[O_3]^2}{[O_2]}$ can be obtained, whi…
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schemas can bias an individuals perception toward identifying specific …
perceptual set
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schemas can bias an individuals perception toward identifying specific …
perceptual set
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schemas can bias an individuals perception toward identifying specific …
perceptual set
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physical vs. chemical change quick check which of the following example…
recharging batteries
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the passage below describes a process of scientific inquiry. select the…
He concluded that the temperature of the water does indeed affect the solubility of salt.
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question 9 1 pts all of the following is true of exergonic reactions ex…
B. stores energy in chemical bonds
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9. justify why the number of valence electrons stays the same within a …
Valence - electrons are the electrons in the outermost energy level of an atom. Elements in the same group have the same number of valence - electrons because as you move down a g…
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which is not true of energy: energy is created by plants and destroyed …
energy is created by plants and destroyed by consumers
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the passage below describes a process of scientific inquiry. select the…
He concluded that a thicker layer of oil does indeed reduce water evaporation more effectively than a thin layer.
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the passage below describes a process of scientific inquiry. select the…
He found that the rock candy made with white sugar had larger crystals than those made with pure cane sugar.
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which of these groups is characteristic of thiols?
E. Option with sulfhydryl group (assuming the group labeled E in the image contains the -SH group)
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dr. jekyll and mr. hyde: theme how does this excerpt best develop the t…
Chemicals and the doctor's clothes are found with Hyde.
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drag and drop the words or phrases that accurately complete the paragra…
1. be transformed 2. motion 3. thermal 4. transformed
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which of the following are examples of chemical or nuclear energy? soun…
- B. nuclear fission occurring in a reactor - C. a substance changing into a complete other substance - E. chemical reaction occurring when two substances combine
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the human body stores chemical energy from digested food. some of the c…
C. Digested food is a source of potential energy.
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which change is an example of transforming potential energy to kinetic …
None of the above options are examples of transforming potential energy to kinetic energy.
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energy can be transformed from one form to another. the diagram shows o…
nuclear to thermal and radiant
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what are the two main types of energy? radiant and chemical thermal and…
kinetic and potential
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11 multiple choice 0.3 points calculate 7.8213 + 0.020 ÷ 4.125 and repo…
7.83
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29 multiple choice 0.3 points which is not a pure substance? copper sul…
C. tomato soup
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28 multiple choice 0.3 points a property that depends on the amount of …
A. Extensive
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27 multiple choice 0.3 points which of the following is a chemical prop…
It can react with chlorine gas to form platinum(IV) chloride.
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24 multiple choice 0.3 points which of the following is a pure substanc…
Chlorine, $Cl_2$, gas
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23 multiple choice 0.3 points chunky chicken soup is an example of a(n)…
B. heterogeneous mixture
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19 multiple choice 0.3 points which of the following is a mixture? wate…
Ice Tea
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dr. jekyll and mr. hyde, chapters 7 and 8 \quite so, sir,\ returned poo…
The theme of the duality of human nature and the fear of the unknown.
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16 multiple choice 0.3 points of the following, only ________ is a chem…
C. tarnishing of silver
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13 multiple choice 0.3 points which one of the following is an intensiv…
temperature
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portions of orbital diagrams representing the ground - state electron c…
The second option violates the Pauli exclusion principle.
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12 multiple choice 0.3 points which of the following is a mixture? hcl …
B. chocolate pudding
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what is the maximum number of electrons that can have n = 4, m_l = 2 in…
2
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the synthesis of products is limited by the amount of reactants added t…
How many moles of hydrogen? 120 mole(s) How many moles of carbon? 2 mole(s) How many moles of oxygen? 58 mole(s) How many moles of nitrogen? 1 mole(s) How many moles of sulfur? 1 …
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write the ground - state electron configuration for each element. part …
Part 1 of 2: 1s²2s²2p⁶3s²3p⁴ Part 2 of 2: [Xe]4f¹⁴5d¹⁰6s¹
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determine the maximum number of electrons that can be found in each of …
Part 1 of 4: 2 Part 2 of 4: 10 Part 3 of 4: 6 Part 4 of 4: 14
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applying the law of conservation of energy which statement is an exampl…
When a light bulb is turned on, electrical energy is converted to light and heat.
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select the quantum numbers associated with the 2p orbital. principal qu…
Principal quantum number ($n$): 2 Angular momentum quantum number ($l$): 1 Possible magnetic quantum numbers ($m_l$): -1, 0, 1
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question 14 a 55 - year - old has developed a pressure ulcer on her rig…
Question 14: C. L89.319 When is it appropriate to use history of malignancy from category Z85?: It has been excised, no evidence of any existing primary malignancy, and there is n…
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determine the charge on the cation. part 1 of 3 write the symbol and ch…
Part 1 of 3: Pb²⁺ Part 2 of 3: Cu²⁺ Part 3 of 3: Fe³⁺
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write the name for each of the following ionic compounds. part 1 of 2 n…
Part 1 of 2: Sodium sulfide Part 2 of 2: Potassium nitride
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consider the following ionic compounds. part 1 of 2 write the systemati…
Part 1: gold(III) nitride Part 2: tin(IV) sulfide
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for the last electron for s, quantum numbers values are a n=3, l=0, m=-…
B. $n = 3, l = 1, m = 1, s=\frac{1}{2}$
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write the name for the co₃²⁻ ion.
Carbonate ion
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identifying energy transformations what energy transformation is taking…
chemical energy to thermal energy
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bonding takes place to achieve ______ a stability b friendship c zero e…
A. stability
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how can carbon dioxide be considered a pollutant when it is a natural c…
B. Carbon dioxide is considered a pollutant when larger concentrations than normal are present in the air as a result of human activity.
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convert the following temperatures to kelvin. round your answers to the…
Part 1 of 3: 195 K Part 2 of 3: 310 K Part 3 of 3: 266 K
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for noble gases, ionization energy is expected to be ____ and electron …
A. very high, zero
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soot results from burning organic compounds. soot is an example of ____…
A. a primary pollutant
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bromine is a reddish brown liquid. calculate its density if 421.2 g of …
$3.12$
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write the chemical formula for aqueous nitrous acid. be sure to include…
$HNO_2(aq)$
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potassium and oxygen will react to form an ionic compound. part 1 of 2 …
Part 1: $K_2O$ Part 2: Potassium oxide
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write the chemical formula for the ionic compound formed from the combi…
$MgS$
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ionization energy is the amount of energy required to remove one electr…
False
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write the molecular formula for dinitrogen pentoxide.
$N_2O_5$
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name each acid from its chemical formula. part 1 of 2 hcl(aq) part 2 of…
Part 1 of 2: Hydrochloric acid Part 2 of 2: Hypochlorous acid
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write the chemical formulas for the following molecular compounds: part…
Part 1 of 4: $P_2O_5$ Part 2 of 4: $NO_3$ Part 3 of 4: $NI_3$
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which of the following compounds are ionic? check all that apply. sf₂ h…
MgO
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k+ is bigger in size than ca2+ true false
True
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question 3: which of the following species, species (i) or (iii) shown …
B. Species (iii)
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question 2: what group of the periodic table contains alkaline earth me…
E. Group 2
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write the formula for the following ionic compounds: part 1 of 3 name e…
Part 1 of 3: $Rb_2O$ Part 2 of 3: $Co_2S_3$ Part 3 of 3: $FeSO_4$
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part 2 of 2 select the element(s). □br₂ □co₂ □nacl □no
Br₂
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several elements and compounds are given below. check all that apply. p…
$H_2O$, $CH_4$
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several elements and compounds are given below. check all that apply. p…
$\ce{H2O}$, $\ce{CH4}$
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classify each element as an alkali metal, alkaline earth metal, or neit…
Te: neither Na: alkali metal Fe: neither Ra: alkaline earth metal Ba: alkaline earth metal
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part 2 of 3 classify the element in period 2 and group 16. check all th…
Part 2 of 3: main - group element, nonmetal Part 3 of 3: Oxygen
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consider the element in period 2 and group 16. part 1 of 3 highlight th…
O
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indicate the number of protons, neutrons, and electrons in $_{29}^{65}c…
Part 1 of 3: 29 Part 2 of 3: 36 Part 3 of 3: 29
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drag the missing word into place i cant list every on the periodic tabl…
element
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give the number of protons and electrons in each of the following commo…
| ions | protons | electrons | | ---- | ---- | ---- | | $Al^{3 +}$ | 13 | 10 | | $H^{+}$ | 1 | 0 | | $I^{-}$ | 53 | 54 |
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the contains the larger subatomic particles, while the smaller particle…
nucleus
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drag the right word to its definition a pure chemical substance that ca…
Element
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write the isotope symbol for the following descriptions. part 1 of 2 wr…
Part 1: $_{42}^{98}Mo$ Part 2: $_{76}^{192}Os$
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which of the following is the proper technique for sterile compounding?…
Filter needles should be used when removing volume from a multi - dose vial.
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there are three sets of sketches below, showing the same pure molecular…
For 177 °C, choose the sketch with widely - spaced molecules (gas state). For 17 °C, choose the sketch with closely - packed but mobile molecules (liquid state). For - 21 °C, choo…
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which of the following factors can lead to precipitation of drug molecu…
B. pH
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this passage describes a chemical reaction. read the passage. then, fol…
To solve this, we analyze the chemical reaction description: ### Step 1: Identify Reactants and Products In a chemical reaction, **reactants** are the substances that combine (or …
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open - ended questions: answer the following questions in complete sent…
Mass is the amount of matter and is constant; weight is the gravitational - force on an object and varies. Example: an astronaut's mass is same on Earth and in space but weight is…
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this passage describes a chemical reaction. read the passage. then, ans…
B. sodium hydroxide (NaOH) C. hydrogen (H₂) D. chlorine (Cl₂)
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question 4 not yet answered points out of 1.00 p flag question the root…
d. weak acids
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check the box under each molecule in the table below that is an isomer …
Check the box under the first molecule (the one with a double - bond and two hydroxyl groups).
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note: to answer some of the questions, it may help to reference a perio…
The isotope does not emit a form of radiation.
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ethanol is a chemical that is used in many hand sanitizers. it is produ…
s: - H: 12 - C: 4 - O: 2 - Ethanol molecules: 2
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consider the reaction below. pcl₅(g)⇌pcl₃(g) + cl₂(g) at 500 k, the rea…
0.042
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when electrons transfer from one atom to another, both atoms become and…
First blank: Ions Second blank: Ionic Third blank: Covalent Fourth blank: Molecule
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complete the table about subatomic particles. terms can be used more th…
| Particle | Charge | Location | |--|--|--| | electron | negative | outside the nucleus | | proton | positive | inside the nucleus | | neutron | neutral | inside the nucleus |
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read the excerpt from the author to her book. \thou ill - formd offspri…
C. A.A.B.B
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in what way are the lines of \the weary blues\ similar to the lyrics of…
The poem uses repetition to create meaning.
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what is eutrophication? a process that removes nutrients from water bod…
# Breve explicación: La eutroficación es el crecimiento excesivo de algas y otros organismos acuáticos debido a la presencia excesiva de nutrientes, como nitratos y fosfatos, en c…
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ch₃ch₂ch₂ch₂ch(ch₃)br o 1° o 2° o 3° part 2 of 3 br o 1° o 2° o 3° part…
Part 1: 2° Part 2: 1° Part 3: 1°
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which website citations are formatted correctly? select three options. …
B. Greene, Tom. Home Composting. Hanover Growers Guild, 15 March 2010. Web. 22 April 2011. D. Lee, Kim. Stake Your Tomatoes. Future Farmers of America, n.d. Web. 24 June 2012. E. …
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he established the theory of electrolytic dissociation, supplying a rea…
Insoluble
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question 6 1 pts sample question 2: tests application of a concept cove…
D. 3
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which of the following statements about chemical bonds is false? a. ato…
B. Electron sharing forms both ionic and covalent bonds.
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let a bottle of salad dressing stand on the table for a few hours and y…
insoluble