Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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what is contained in the nucleus of an atom? select all that apply a pr…
A. protons B. neutrons
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hg²⁺ + 2ki → hgi₂ + 2k⁺ ratio 1 2 → 1 2 moles 0.000002568? → 0.00000256…
\(0.000515\space g\)
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how much mercury is in this sample? hg²⁺ + 2ki → hgi₂ + 2k⁺ ratio 1 2 →…
\(0.000002568\) moles
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individual practice write the unabbreviated electron configurations of …
1) \(1s^{2}2s^{2}2p^{6}\) 2) \(1s^{2}2s^{2}2p^{4}\) 3) \(1s^{2}\) 4) \(1s^{2}2s^{2}2p^{6}3s^{1}\) 5) \(1s^{2}2s^{1}\) 6) \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\) 7) \(1s^{1}\) 8) \([Xe]…
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question 6 of 10 points possible: 1.00 determine whether each described…
1. Exothermic 2. Exothermic 3. Endothermic 4. Endothermic 5. Endothermic 6. Exothermic
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what is the heat, q, in joules transferred by a chemical reaction to th…
$1569\ J$
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ratio 1 2 1 2 ★ score: 82.00 moles ? ? → moles? ? mass ? 0.005 g → 0.00…
\(2.57\times 10^{-6}\)
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to test for the concentration of mercury (hg²+), a group of researchers…
\(2.57\times 10^{-6}\)
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answer the questions below given the balanced chemical equation and the…
- Moles of \(C_3H_8\) at start: \(3.5\) moles - Limiting reactant: \(O_2\) - Excess reactant left: \(1.3\) moles
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it turns out that there are: 2 h₂(g) + o₂(g) → 2 h₂o(g) 10 grams (5 mol…
\(H_{2}\)
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calculate the number of moles present. lets say there are: 2 h₂(g) + o₂…
moles of \(H_2 = 5\ mol\), moles of \(O_2=3\ mol\)
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do you remember how to convert mass and moles? on the next screen, your…
\(1.9177\ mol\ C_6H_{12}O_6\), \(3.125\ mol\ O_2\), \(2441.0\ g\ AgNO_3\)
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9) look at the model. then, answer the question and choose the best ans…
The electron would have to gain energy.
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6) type in the correct answers using the following bohr models. type th…
F: 2 Cl: 3 Br: 4
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read the poem. skimming the bottom in the company of toes, i observe th…
abcb
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19. based on the concept of periodic trends, answer the following quest…
d. \(F\) e. \(F\) f. \(P\) (specifically \(P^{3 -}\))
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18. based on the concept of periodic trends, answer the following quest…
a. \(Na\) b. \(Be\) c. \(Na\)
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give all the possible values of the four quantum numbers of an electron…
\(+\frac{1}{2}\) and \(-\frac{1}{2}\)
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question 5 (1 point) what is the shape of an alkyne molecule? bent line…
linear
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paul and karen were studying physical and chemical properties of matter…
The mass of a substance is a way to measure the amount of matter it contains.
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which si unit of length is most commonly used to indicate the radius of…
A. 1 picometer (pm)
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which of the following statements is true about the atoms of any elemen…
C. All the atoms of a given element are identical in that they have the same number of protons.
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which statement is true about all the atoms of a given element? a they …
C. They all have the same number of protons.
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when you were building a dune buggy but given only the mass of the comp…
Molar mass
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all that work to find out how many dune buggies can be built... on the …
1 (because the engine is the limiting factor. We can only build as many buggies as we have engines, even though we have more wheels, seats, and controls)
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on the prior screen, you had 150 kg of wheels, 500 kg of seats, 200 kg …
The mass of one of each type of component
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until now, youve been working in amounts of moles or molecules. however…
Not enough information to answer
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9. a) what does \->\ mean? b) reactants are found on the ______ side of…
a) \(1\ P_4+5\ O_2 ightarrow1\ P_4O_{10}\), synthesis reaction b) \(2\ FeCl_3 + 3\ Na_2S ightarrow 6\ NaCl+1\ Fe_2S_3\), double - displacement reaction c) \(1\ Br_2+1\ CaI_2 ighta…
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now lets say we have: 1.64 moles of al 2.42 moles of hbr using the equa…
Limiting reactant: \(HBr\) Moles of \(AlBr_{3}\) formed: \(0.81\space mol\) Moles of excess reactant (\(Al\)) left over: \(0.83\space mol\)
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practice iii answer the question below using the following balanced equ…
\(4.55\) moles
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answer the question below using the following balanced equation: 3 si(s…
\(5.41\) moles
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you must calculate how many moles of product each reactant can form (as…
When using 5 moles of \(H_2\) (assuming enough \(O_2\)): \(5\space mol\) of \(H_2O\) forms. When using 3 moles of \(O_2\) (assuming enough \(H_2\)): \(6\space mol\) of \(H_2O\) fo…
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instructions fill in the arrows below with the following terms. increas…
- Left - hand vertical arrows (pointing down): increasing atomic radius, increasing metallic character. - Top - right diagonal arrow (pointing up - right): increasing electronegat…
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question 9 (1 point) which alkane would most likely be a liquid at room…
pentane # Question 10
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question 8 (1 point) which of the following compounds can exist as geom…
IV only
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how much water is required (in ml) to dilute 5.00 ml of a 0.0500 m solu…
\(95.0\space mL\)
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when a schema is activated a it helps us organize information and make …
A. it helps us organize information and make predictions about the world.
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based on what you now know about limiting reactants and using the recip…
- The number of banana splits that can be made is 2. - The limiting reactant is the ice - cream.
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question 7 (1 point) which of the following compounds contains 10 carbo…
2,2,3 - trimethylheptane
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question 6 (1 point) the compound above is classified as a(n) alkane ca…
C. aldehyde
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now lets look at another equation: co₃²⁻(aq) + 2h⁺(aq) → h₂o(l) + co₂(g…
\(1.2044\times 10^{24}\) \(H^{+}\) ions
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question 4 (1 point) which compound is a structural isomer of the compo…
pentane
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now lets look at another equation: co₃⁻²(aq) + 2h⁺(aq) → h₂o(l) + co₂(g…
For \(2\times10^{15}\) carbonate ions: \(4\times10^{15}\) \(H^{+}\) ions For \(6.022\times10^{23}\) carbonate ions: \(1.2044\times10^{24}\) \(H^{+}\) ions
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checking comprehension balance the following equations: 1) ( p + o _ { …
1
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checking comprehension 14 multiple - choice question balance the follow…
3
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question 3 (1 point) the general formula for a cycloalkane can be repre…
\(C_{n}H_{2n}\) (the third option).
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checking comprehension balance the following equations: 1) ( p + o _ { …
\(2AgF+1CaCl_{2}\to2AgCl + 1CaF_{2}\)
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what does building cars have to do with chemistry? in the dune buggy as…
- 12 wheels: Excess reactant - 1 engine: Limiting reactant - 5 controls: Excess reactant - 5 seats: Excess reactant
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balancing chemical equations checking comprehension balance the followi…
\(4P + 5O_2 ightarrow P_4O_{10}\) (the first option among the multiple - choice)
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what if you dont have exactly the amount you need? your balanced equati…
1
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balancing chemical equations cynthia wilson c₃h₈ + 5o₂ → 3co₂ + 4h₂o 3 …
It has the same number of atoms of a given element.
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an analogy what is a limiting reactant? to explain what a limiting reac…
\(4\ wheels+1\ seat + 1\ engine+1\ controls ightarrow1\ dune\ buggy\)
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balancing chemical equations c₃h₈ + o₂ → co₂ + h₂o multiple - choice qu…
C. C (Carbon)
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balancing chemical equations c₃h₈ + o₂ → co₂ + h₂o multiple - choice qu…
C. \(C\), H. \(H\)
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balancing chemical equations cynthia wison which element are we going t…
O (oxygen)
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21. complete the following chart: k mg ne n cl si atomic # period group…
| | \(K\) | \(Mg\) | \(Ne\) | \(N\) | \(Cl\) | \(Si\) | |---|---|---|---|---|---|---| | Atomic # | \(19\) | \(12\) | \(10\) | \(7\) | \(17\) | \(14\) | | Period | \(4\) | \(3\) | …
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7. molecular compounds 1. write the formula a) diphosphorus trioxide b)…
a) $P_2O_3$ b) $SF_6$ c) $Cl_2O$ d) $I_2$
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20. based on the concept of periodic trends, answer the following quest…
a. \(S\) b. \(Au\) c. \(Au\)
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balancing chemical equations cynthia wilson h₂ + o₂ → h₂o multiple - ch…
1
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balancing chemical equations cyrthla wilson h₂ + o₂ → h₂o multiple - ch…
2
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balancing chemical equations cynthia wiliam h₂ + o₂ → h₂o multiple - ch…
2
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7. molecular compounds 1. write the formula a) diphosphorus trioxide b)…
## 7. Molecular Compounds ### 1. Write the formula a) \(P_{2}O_{3}\) b) \(SF_{6}\) c) \(Cl_{2}O\) d) \(I_{2}\) ### 2. Write the name a) dinitrogen dioxide b) phosphorus pentachlor…
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balancing chemical equations cytine willson h₂ + o₂ → h₂o multiple - ch…
2
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read the excerpts from samuel johnsons preface to a dictionary of the e…
strives to emphasize the effort his dictionary required.
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multiple - choice question what is the coefficient of water (h₂o) in th…
6
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3 tries left beer is brewed by ______________ fermentation with water, …
cold
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6. ionic compounds 1. write the formula (hint: must criss cross) a) ber…
6. a) \(BeI_{2}\) b) \(Al_{2}O_{3}\) c) \(BaF_{2}\) 7. a) \(P_{2}O_{3}\) b) \(SF_{6}\) c) \(Cl_{2}O\) d) \(I_{2}\)
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how many hydrogen (h) atoms can be found on both sides of the balanced …
\(12\)
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heating and cooling curves heating curves a heating curve shows how the…
- Point A: Temperature, Time, Solid, Heat, Move (kinetic), Temperature - Point B: \(0^{\circ}C\), Melting, Melt, Solid, Liquid, Solid, Liquid - Point C: Melted, Liquid, Temperature
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check your knowledge: brewing 3 tries left 1. describe the process of b…
A. The process of brewing beer is complex and begins with the harvest of grain that is fermented, mashed, and strained to form the brew.
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6. ionic compounds 1. write the formula (hint: must criss cross) a) ber…
1. a) \(BeI_{2}\) b) \(Al_{2}O_{3}\) c) \(BaF_{2}\) 2. a) potassium sulfide b) sodium iodide c) lithium oxide
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it turns out that molarity isnt the only unit of concentration. in fact…
\(1000000000\space mL\)
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6. ionic compounds 1. write the formula (hint: must criss cross) a) ber…
1. a) \(BeI_{2}\) b) \(Al_{2}O_{3}\) c) \(BaF_{2}\) 2. a) potassium sulfide b) sodium iodide c) lithium oxide 3. a) \(P_{2}O_{3}\) b) \(SF_{6}\) c) \(Cl_{2}O\) d) \(I_{2}\) 4. a) …
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explain why atomic size decreases across a period from left to right. *…
- For "Explain why atomic size decreases across a period from left to right": As we move left - to - right across a period, nuclear charge increases while electrons are added to t…
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13. circle the atom in each pair that has the greater electronegativity…
a) Ga, b) O, c) Cl, d) Br, e) Sr, f) O
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question 2 3 tries left wine is made in ______ steps. three six four se…
four
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3 tries left sparkling wines sparkle because they contain ____________.…
carbon dioxide
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josh is designing a lab to separate a mixture of sulfur powder and iron…
C. Magnetic attraction
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what is the molarity of lead in this sample obtained from aliyas house?…
\(1.1\times 10^{-7}\)
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house? report your answer to 2 significant figures. molarity (m) = \\fr…
\(1.1\times 10^{-7}\space M\)
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heating and cooling curves heating curves a heating curve shows how the…
Temperature; Time; solid; heat; move (or vibrate); temperature
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a heating curve shows how the _ (y - axis) changes as a substance is he…
Temperature; Time
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heating and cooling curves heating curves a heating curve shows how the…
Point A: solid; heat; vibrate; temperature. Point B: \(0\); melting; melt; solid; liquid; solid; liquid. Point C: melted; liquid. Between C & D: temperature. Point D: \(100\); boi…
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in some process, the system absorb heat. the process is _________. at e…
endothermic
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question 3 1 pts a reaction occurs, resulting in an increase in the vol…
by the system on the surroundings ### Question 4
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question 1 1 pts energy can be transferred as ______ or __________. hea…
heat, work # Question 2
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lets calculate the molarity. now that you know that 50.5 grams of sucro…
\(12\)
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now, the molar mass of table sugar or sucrose (c₁₂h₂₂o₁₁) is 342.30 gra…
\(0.148\space mol\)
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what are the units of concentration? our goal is to measure the concent…
LESS CONCENTRATED: 5 particles; MORE CONCENTRATED: 13 particles
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, which are positively charged, are located inside the nucleus.
Protons
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what do all atoms of the same element have in common? a total mass b nu…
B. number of protons
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which statement(s) is/are false? select all that apply a neutral atoms …
B. All atoms are about the same size. C. Protons and neutrons repel each other and position themselves far apart inside the atom.
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ck - 12 atom 4/10 the smallest particle of an element that has the elem…
atom
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select the text from the paragraph that best helps you understand that …
transmuting the blue light of the ocean into brilliant red, green, and orange hues
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what are the subatomic particles that do not possess any charge called?…
Neutrons
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what are subatomic particles with a positive charge called? enter the a…
Protons
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soaps, similar to the ones used to wash grease from the pots in your ki…
A molecule that would clean the oil off of birds is one that can dissolve in both water and oil. Such a molecule has a nonpolar tail, which is a long hydrocarbon region. This regi…
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so far we know three things: to clean these birds we need a substance t…
It must have polar and nonpolar regions.
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when you think about how you can clean oil off of birds and other anima…
C. Polar substances dissolve in polar substances. D. Nonpolar substances dissolve in nonpolar substances.
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now, lets connect what you learned from examining isopropyl alcohol to …
D. It should have a polar region that concentrates electrons in a particular part of the molecule; E. It could contain an area with a full charge such as an ion.