Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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26. how many electrons can an orbital contain? a. 1 b. 2 c. 3 d. 4 27. …
26. B. 2 27. D. \([Kr]5s^{2}4d^{10}5p^{2}\) 28. A. An element symbol surrounded by dots representing its valence electrons. 29. A. The 4s orbital is lower than the 3d orbital in t…
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18. how many valence electrons does a group 1a metal atom have? a. 1 b.…
18. a. 1 19. c. \([He]2s^{2}2p^{4}\) 20. b. the period in which the element is found 21. d. \(2n^{2}\) 22. a. the ground state 23. a. de Broglie 24. c. The photon gives up some en…
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helmer: of course you couldnt, poor little girl. you had the best of in…
as a silly creature with no ability to spend wisely
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question juniper is trying to dilute a chemical in her lab for an exper…
\(14.4\)
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if an oncologist needs to slow the progression of cancer, which of the …
surgery
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which of the following treatments is especially effective for lymphoma …
radiation therapy
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research suggests marijuana use in adolescence may increase the risk of…
C. chemicals in marijuana increase dopamine activity
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what did president abraham lincoln do in 1862 to help influence food re…
He appointed the first chemist to serve in the Department of Agriculture.
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which of the following are common conventional cancer treatments practi…
chemotherapy, radiation therapy, surgery
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what did president roosevelt do in 1906 that influenced the regulation …
He passed two laws: The Meat Inspection Act and The Food and Drugs act.
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the exposed electrodes of a light bulb are placed in a solution of h₂so…
none of the above
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complete the atom inventory for the reaction below. c₄h₁₀ + o₂ → co₂ + …
Reactants (O): \(2\) (from \(O_2\) formula, before balancing). Products (O): \(3\) ( \(2\) in \(CO_2\) and \(1\) in \(H_2O\) as per un - balanced equation). But for a balanced equ…
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how many barium atoms are in the compound below? ba(mno4)2
\(1\)
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how many oxygen atoms are in the compound below? ba(mno₄)₂ remember, th…
\( 8 \)
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how many manganese atoms are in the compound below? ba(mno₄)₂ remember,…
\(2\)
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many people are choosing to eat organic produce. they believe that it i…
C. Compare and contrast
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5. how many dots are in the electron - dot structure for phosphorous (p…
five
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4. which of the following is the correct orbital box diagram for nitrog…
The first option (with \(1s\) and \(2s\) filled and three unpaired electrons in \(2p\) orbitals) is the correct orbital box diagram for nitrogen.
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3. how many unpaired electrons does oxygen have in its ground state ele…
2
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electron configuration quiz cp chemistry a o / module 4: electronic str…
6
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metamorphism that is caused by proximity to extreme heat (usually near …
- First question: contact metamorphism - Second question: gneiss
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electron configuration quiz cp chemistry a o / module 4: electronic str…
Electrons will always fill the lowest energy orbitals first.
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in poetry, meter refers to... the rhyme scheme in quatrains. a poems rh…
a poem's rhythmic structure.
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youve recently purchased three newborn calves from your neighbor to fos…
Animal health record
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in which state of matter are the molecules spaced farthest apart? liqui…
Gas
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what is incorrect about this orbital diagram? both arrows in the 2p box…
There should be 1 electron (arrow) in the first \(2p\) box and one in the 2nd \(2p\) box.
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true or false removing heat adds kinetic energy to the molecules. true …
False
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9. using the isotope from the image provided, what does the x mean? a t…
B. Total number of protons and neutrons in the nucleus.
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relative electronegativity quick check which chemical formula represent…
\(ClO^-\)
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question 46 (2 points) listen in medieval european universities such as…
Theology, Philosophy, Law, and Medicine
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unit 2 cfa #1 8. what happens to silicon when a neutron is added to the…
A. It becomes a different isotope of Silicon.
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use the periodic table to answer the question based on patterns in the …
potassium (\(K\)) with a \(1^{+}\) charge
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unit 2 cfa #1 7. based off of the image below, how many natural isotope…
B. 2
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relative electronegativity quick check which statement best explains wh…
The elements have filled valence levels.
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relative electronegativity quick check which quantity determines how tw…
the difference in their electronegativities
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use the periodic table to answer the question. how would the electron c…
It would gain three electrons.
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6. what happens to silicon when a proton is added to the nucleus? a it …
B. It becomes Phosphorus.
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5. using the isotope from the image provided, what does the number 48 m…
B. Total number of protons and neutrons in the nucleus.
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1. using the isotope from the image provided, what does the number 20 m…
C. Total number of protons in the nucleus.
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in the modern periodic table, which of the following represents the las…
D. Mg and Ca
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what color do bases turn litmus paper? yellow pink red blue
blue
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name that cycle atmospheric co₂ co₂ in ocean organic matter fossil fuel…
Carbon Cycle
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which property do solutions with low ph values have? o tastes sour o fe…
tastes sour
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which arrow in the image below shows the following process: gas exchang…
6
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which term do these characteristics describe? the substance is not unif…
heterogeneous mixtures
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which choice can be classified as a pure substance? heterogeneous mixtu…
compound
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what is a substance said to be if it evaporates easily? o volatile o co…
volatile
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what does the (s) after caco₃ represent in the reaction? h₂co₃(aq) + ca…
State of Matter
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write the unbalanced chemical equation for: nitrogen plus hydrogen prod…
\(N_2 + H_2 \to NH_3\)
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name: when elements combine in certain proportions into a new substance…
\(O_2\): E, \(HCl\): C, \(CO_2\): C, \(Fe\): E, \(MgBr_2\): C
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what does the caco₃ + 2hcl represent in the reaction? h₂co₃(aq) + cacl₂…
Products
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what reaction would the chemical equation ch₄ + 2o₂ → 2h₂o + co₂ repres…
combustion of methane
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what does the nabr + cl₂ represent in the reaction? nabr + cl₂ → nacl +…
Reactants
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what does the arrow represent in the reaction? nabr + cl₂ → nacl + br₂ …
Yields
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what is true when a reaction has reached equilibrium? o the reaction ha…
The concentration of products and reactants is constant.
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the food bolus becomes this as it is mechanically mixed in the stomach …
C. Chyme
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when atoms react, they often lose, gain, or share electrons to form a m…
D. 8A
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write the unbalanced chemical equation for: butane, c4h10 plus oxygen g…
\(C_4H_{10}+O_2 ightarrow CO_2 + H_2O\)
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how do ionic bonds differ from covalent bonds? electrons are shared in …
Electrons are shared in a covalent bond.
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periodic table high school reference sheet the periodic law states that…
D. The properties of elements recur periodically when arranged by increasing atomic number.
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which chemical formula shows an ionic compound? n₂o co₂ c₆h₁₂o₆ nacl
\(NaCl\)
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which statement about exothermic reactions is true? energy from an outs…
More heat is given off than is put into the reaction.
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which is the most likely reason for the relationship between alcohol us…
Alcohol lowers inhibitions and impairs judgment.
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¿cuál de los siguientes es un cambio químico? azúcar disolviéndose en a…
Quema de leña
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the octet rule • atoms are most stable when they have a full outer shel…
- Bromine: Lewis dot structure with 7 dots, gains 1 electron. - Calcium: Lewis dot structure with 2 dots, loses 2 electrons. - Lithium: Lewis dot structure with 1 dot, loses 1 ele…
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scent is tightly interwoven with our daily lives, often evoking signifi…
B. They believe the scents could illuminate important aspects of ancient life.
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ex: carbon has how many valence electrons? ex: chlorine has how many va…
Carbon has \(4\) valence electrons. Chlorine has \(7\) valence electrons.
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elements in group 17 will have valence electrons. atoms aim to have a f…
7) helium: \(2\) 8) magnesium: \(2\) 9) sulfur: \(6\) 10) hydrogen: \(1\) 11) krypton: \(8\) 12) aluminum: \(3\)
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name: period what are valence electrons? • valence electrons are the in…
- Valence electrons are the **outermost electrons** in an atom. - The **group number (for main - group elements)** indicates how many valence electrons it has. - Elements in Group…
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pre - ap chemistry bellwork 10/27 ▶organize your binder. ▶answer this q…
The 3s sublevel can hold 2 electrons. The electron configuration of Na is \(1s^{2}2s^{2}2p^{6}3s^{1}\).
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3. study the dilution calculations on pages 325 - 328 of your textbook.…
a. Volume of \(5.0\space M\space HCl\) needed is \(50\space mL\). Procedure: Measure \(50\space mL\) of \(5.0\space M\space HCl\) with a graduated cylinder, transfer to a \(250\sp…
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what is the overall polarity of this particle? polar nonpolar
nonpolar
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when a metal atom combines with a nonmetal atom, there is a large diffe…
Ionic
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the particle is bent (3 regions) in shape. what is the closest bond ang…
\(120^{\circ}\)
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what is the vsepr geometry of the particle? s o o trigonal pyramidal te…
bent
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2. calculate the number of moles of hcl in 40.0 ml of 1.0 m hcl and the…
The number of moles of HCl is \(0.040\space mol\) and the number of moles of NaOH is \(0.015\space mol\)
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using the as\ idea, how many bonds are made in the compound ccl4? n = 4…
\(4\)
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learn by doing a sample of co₂ gas is in a 755 ml container and has a p…
\(P_1 = 585\), unit: \(mmHg\) \(V_1 = 755\), unit: \(mL\) \(P_2=\)?, unit: \(mmHg\) \(V_2 = 482\), unit: \(mL\) Calculated value of \(P_2\): \(916\), unit: \(mmHg\)
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using the as\ idea, how many electrons are \shared\ for the compound cc…
8
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using the as\ idea, how many electrons are \available\ for the compound…
\(32\)
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using the as\ idea, how many electrons are eeded\ for the compound ccl4?
40
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a sample of co₂ gas is in a 755 ml container and has a pressure of 585 …
For the first part: \(P_1 = 585\) (unit: mmHg), \(V_1 = 755\) (unit: mL), \(P_2=\)? (unit: mmHg), \(V_2 = 482\) (unit: mL), calculated \(P_2\approx916\) mmHg. For the argon gas pr…
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which property do nonpolar covalent and polar covalent compounds demons…
insulator
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what is the formula for sulfurous acid? so₂ hso₄ h₂so₄ h₂so₃
\(H_{2}SO_{3}\)
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what is the name of this binary molecular compound? co carbon monoxide …
carbon monoxide
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which bond is the strongest?
C
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a sample of oxygen, o₂, occupies 32.2 ml at 303 k and 452 torr. what vo…
\(V_1 = 32.2\) mL, \(T_1 = 303\) K, \(V_2=\)?, \(T_2 = 203\) K. The value of \(V_2\) is approximately \(21.6\) mL.
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correct. torr is the given unit of pressure in this problem. correct. k…
120 kPa
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what is the name of baso4? barium sulfate barium sulfide barium sulfite…
barium sulfate
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what is the formula of barium phosphate? ba₃p₂ bahpo₄ ba₃(po₃)₂ ba₃(po₄…
\(Ba_{3}(PO_{4})_{2}\)
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what is the name of this ionic compound? k₂co₃ potassium chlorate potas…
potassium carbonate
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highlight the electron shells and circle the valence electrons for carb…
Carbon has 4 valence electrons.
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a sample of nitrogen, n₂, occupies 45.0 ml at 352 k and 625 torr. the s…
255 K
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what is the name of cro4^2-? dichromate ion chromate ion chromium tetro…
chromate ion
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which of the following is not a multivalent ion? cu+ ag+ sb5+ cr3+
B. \(Ag^{+}\)
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name the following ionic species. cs₃n cesium nitrogen cesium nitride c…
B. cesium nitride
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what is the correct formula for aluminum phosphide? alp al₅p₃ al₃p₃ pal
A. \(AlP\)
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what is an electrolyte? a substance that conducts electric currents a s…
a substance that conducts electric currents
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which image represents the ionic compound strontium fluoride, srf2? a. …
C. \(Sr^{+2}2[:\ddot{F}:]^{-1}\)
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learn by doing a sample of nitrogen, n₂, occupies 45.0 ml at 352 k and …
- \(P_1 = 625\), unit: torr - \(T_1 = 352\), unit: K - \(P_2 = 455\), unit: torr - \(T_2 = 257\), unit: K