Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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2. atomic radius a) define atomic radius:
Atomic radius is the distance from the center of an atom's nucleus to the outermost shell of electrons.
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if the below reaction occurs and the equation is properly balanced with…
\(8\)
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w3: periodic properties 1. net attractive force: a) the net attractive …
1. a) increases b) decreases 2. a) Half the distance between the nuclei of two identical atoms bonded together (for non - metals in covalent bonds) or half the distance between ad…
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if the below reaction occurs and the equation is properly balanced with…
Question 1: \(3\) Question 2: \(12\) Question 3: \(35\)
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which is one method for detecting cancer? receiving radiation taking ch…
doing proper self - exams
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which statement(s) is/are true for a liquid that is evaporating? select…
A. vapor pressure < atmospheric pressure, D. Bubbles cannot form.
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what is the name of nano3? sodium nitrate sodium nitrite sodium(i) nitr…
sodium nitrate
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what is the formula for ammonium nitrate? (nh₄)₃n nh₄no₃ nh₄no₂ nh₄n
NH₄NO₃
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what is the formula for copper(il) oxide? co₂ cuo cu₂o cuco₄
CuO
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which statement(s) are true for a liquid that is at its boiling point? …
B. The vapor pressure of the liquid and the atmospheric pressure are equal.
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what is the name of sn(no3)2? tin nitride tin(ii) nitrate tin nitrogen …
tin(II) nitrate
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which statement(s) is/are true for a liquid that has reached its boilin…
A. vapor pressure = atmospheric pressure C. Bubbles can form.
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what is the name of k2s? potassium sulfide carbon sulfide potassium sul…
potassium sulfide
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the addition of heat _______ a phase transition can be analyzed with th…
d. All of the above
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in heating and melting curves, the temperature varies when a substance …
B. FALSE
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particles of a certain state of matter undergo a phase change. before t…
d. Condensation
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calculate the density of each substance. make sure to show your work an…
2. Lamp Oil: \(0.8g/mL\) 3. Maple Syrup: \(1.37g/mL\) 4. Rubbing Alcohol: \(0.79g/mL\) 5. Milk: \(1.03g/mL\) 6. Baby Oil: \(0.83g/mL\) 7. Dish Soap: \(1.06g/mL\) 8. Vegetable Oil:…
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what phase change is the following substance undergoing? first, the par…
d. melting
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particles of a certain state of matter undergo a phase change. before t…
e. Freezing
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how much of the air is made up of nitrogen? less than 50% of the air is…
More Than 50% of the air is nitrogen (\(N_2\))
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what is the name of the polyatomic ion? po₄⁻³ phosphate phosphite phosp…
phosphate
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what is the name of the polyatomic ion? no_{2}^{-1} nitride nitrite nit…
nitrite
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what is the most common ion charge for phosphorus?+5+3-3-1
-3
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what is the name of the polyatomic ion? cio-1 hypochlorite chlorite chl…
hypochlorite
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what is the most common ion charge for fluorine? +1 +2 -1 -2
C. -1
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what is the name of the polyatomic ion? c₂h₃o₂⁻¹ carbon hydrogen oxide …
acetate
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what is the most common ion charge for chlorine? +1 +2 -1 -2
-1
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what is the most common ion charge for calcium? +1 +2 -1 -2
+2
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what is the molar mass of carbon dioxide (co₂)? a. 44.00 g/mol b. 18.02…
A. \(44.00\space g/mol\)
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what is the correct formula that would result from the combination of t…
\(Mg_3(PO_4)_2\)
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what is the formula to convert mass to moles? a. molar mass = number of…
B. Number of moles = Mass of substance / Molar mass
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what is the formula of aluminum acetate? (c₂h₃o₂)₃ai aic₂h₃o₂₃ alac ai(…
\(Al(C_{2}H_{3}O_{2})_{3}\) (the fourth option in the given choices)
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if you have 2 moles of water, how many grams is that? a. 22.99 grams b.…
d. 36.04 grams
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what is the formula of silver permanganate? aicio₃ aghmno₃ almno₄ agmno₄
\(AgMnO_{4}\)
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what do you need to know to convert moles to mass for any substance? a.…
B. The substance’s molar mass
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if you have 10 grams of sodium chloride (nacl), how many moles do you h…
A. 0.17 moles
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the iron in the compound has a charge of fe+2. what is the formula of i…
\(FeCrO_4\)
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what is the key factor to use in converting between mass and moles? a. …
B. Molar mass
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what is the charge on the iron in iron(ii) chromate? +1 +3 +2 -2
+2
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this lab looks at the relationship between the density of a beverage an…
The assumption is that other ingredients have a negligible or constant effect on the density of the solution. Whether it is valid depends on the beverage. If other ingredients are…
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what is the molar mass of water (h₂o)? a. 12.00 g/mol b. 18.02 g/mol c.…
B. \(18.02\space g/mol\)
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which of the following best describes the purpose of converting moles t…
d. To measure the amount of a substance in grams
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if the molar mass of a substance is 18 g/mol, how many grams are in 3 m…
C. 54 grams
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hgo + cl₂ → hgcl + o₂ c + h₂ → ch₄ challenge problem: give it your best…
\(2C_2H_6 + 7O_2 ightarrow4CO_2+6H_2O\)
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hgo + cl₂ → hgcl + o₂ c + h₂ → ch₄ challenge problem: give it your best…
$$2\text{C}_2\text{H}_6 + 7\text{O}_2 ightarrow4\text{CO}_2+6\text{H}_2\text{O}$$
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snc2p chemistry extra practice balance the equations below: 1) ___n₂ + …
1) \(1\) \(N_2 + 3\) \(H_2 = 2\) \(NH_3\) 2) \(2\) \(KClO_3 = 2\) \(KCl + 3\) \(O_2\) 3) \(2\) \(NaCl+1\) \(F_2 = 2\) \(NaF + 1\) \(Cl_2\) 4) \(2\) \(H_2+1\) \(O_2 = 2\) \(H_2O\) …
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art d: practice problems - balance each equation using the process from…
\(2C_{2}H_{6}+7O_{2}\to 4CO_{2}+6H_{2}O\)
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the atomic number tells us the number of in an atom.
protons
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the molar mass of carbon dioxide (co₂) includes the molar masses of one…
Oxygen
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to calculate the molar mass of a compound, add the molar masses of each…
element
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1 d: practice problems - balance each equation using the process from p…
\(2C_2H_6+7O_2 ightarrow 4CO_2 + 6H_2O\)
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the molar mass of water (h₂o) is approximately g/mol.
\(18\)
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the atomic mass of sodium (na) is approximately g/mol.
23
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challenge problem: give it your best shot! c₂h₆ + o₂ → co₂ + h₂o
$$\ce{2C2H6 + 7O2 -> 4CO2 + 6H2O}$$
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the periodic table organizes elements by increasing number.
atomic
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atomic mass is a average of all isotopes of an element.
weighted
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how a marshmallow burns over a campfire is an example of a chemical pro…
True
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physical and chemical properties which of the following are physical pr…
Density, Color, Height
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the atomic mass of carbon - 13 is amu.
\(13\)
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the atomic mass of carbon - 12 is amu.
$12$
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the atomic mass of carbon - 12 is amu. the atomic mass of carbon - 13 i…
12, 13.0033548378, 98.93
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after 60 minutes will be marked wrong. make sure you are in a quie posi…
B. pH 7
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question 40 the bubbles in beer are _. o a. nitrous oxide b.carbon diox…
B. carbon dioxide
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4 fill in the blank 1 point convert 19.7 atm to mmhg do not include uni…
15000
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4. an alloy used for aircraft parts contains aluminum (density 2.70 g/c…
C. \(31.4\%\) titanium
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10. carbon - 14 has an atomic number of 14 and has 14 protons. matching…
1. D. The basic unit of matter that retains the properties of an element. 2. B. The central part of an atom, containing protons and neutrons. 3. A. The weighted average mass of an…
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the first step in laboratory safety is reviewing the safety a sheet tha…
rules, Material, goggles, chemical
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question 24 in the figure above, the amount of energy symbolized by the…
B. activation energy
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timed test this test has a time limit of 1 hour.this test will save and…
A. pH 11
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t/f if false, make the statement true 1. the difference between carbon …
1. False. The difference between carbon - 12 and carbon - 13 is the number of neutrons. 2. True. 3. False. An atom is electrically neutral if it has the same number of protons and…
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question 14 if the activation energy for a chemical reaction is very hi…
A. reaction will progress slowly
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how is atmospheric deposition part of the phosphorus cycle? 5 points ra…
Rainfall
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8. an element exists as 4 different isotopes. 4.35% have a mass of 49.9…
a. The average atomic mass is approximately \(51.99\) amu. b. The element is Chromium (\(Cr\)) as its average atomic mass is close to the known average atomic mass of Chromium.
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7. calcium has three different isotopes. one has a mass of 35.00 amu; a…
The isotope with a mass of 40.00 amu.
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what process must organic phosphorus go through before it usable to pla…
Mineralization
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worksheet - isotopes and average atomic masses show all work for credit…
Lead - 208 # 2.
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energía cinética energía potencial energía enzimática energía de activa…
Energía de activación
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which of the following is a common acid? naoh caco₃ h₂so₄ rewatch
\(H_{2}SO_{4}\)
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what is the product of a neutralization reaction? hydrochloric acid and…
Salt and Water
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3 at what temperature is the solubility of kbr 100g a. 20 c b. 40 c c. …
C. \(60^{\circ}C\)
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multiple - choice question given the following solutions: solution a: p…
A. B. C
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dados los siguientes valores de ph, clasifique las siguientes sustancia…
# Explicación breve: La clasificación de las sustancias se basa en el valor del pH. Las sustancias con pH menor a 7 son ácidas, con pH igual a 7 son neutras y con pH mayor a 7 son…
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instructional science review quiz (term 2) kankakee high school 11. whi…
11. a. \(H_2\), b. \(CO_2\), c. \(H_2O\) 12. b. \(H_2O\) 13. b. Chemical bond 14. b. They form a compound 15. b. Mixture
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instructional science review quiz (term 2) kankakee high school 11. whi…
11. \(a\), \(b\), \(c\) 12. \(b\) 13. \(b\) 14. \(b\) 15. \(b\)
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instructional science review quiz (term 2) kankakee high school name: d…
1. B. Atom 2. C. Iron 3. B. Molecule 4. D. Both a and c 5. C. Water (\(H_2O\)) 6. A. \(O\) 7. A. Carbon 8. B. 118 9. A. Air 10. C. \(H_2O\)
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what is the volume of liquid if it has a density of 1.2 g/ml and a mass…
- What variable are you solving for? \(V\) (volume) - What would the units of the answer be? \(mL\) - Does this answer make sense? Yes
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9. write the nuclear equation for the decay of po - 210 if it undergoes…
$$_{84}^{210}\text{Po} ightarrow_{82}^{206}\text{Pb}+_{2}^{4}\text{He}$$ $$_{82}^{206}\text{Pb} ightarrow_{80}^{202}\text{Hg}+_{2}^{4}\text{He}$$ $$_{80}^{202}\text{Hg} ightarrow_…
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write the nuclear equation for the decay of po - 210 if it undergoes 2 …
$$^{210}_{84}\text{Po} ightarrow^{206}_{82}\text{Pb}+^{4}_{2}\text{He}$$ $$^{206}_{82}\text{Pb} ightarrow^{202}_{80}\text{Hg}+^{4}_{2}\text{He}$$ $$^{202}_{80}\text{Hg} ightarrow^…
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what is absolute zero? a. the temperature at which molecules stop movin…
A. The temperature at which molecules stop moving
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7 what is the value of r in the ideal gas law? a. -273 l atm/mol k b. 2…
D. \(0.0821\space L\cdot atm/mol\cdot K\)
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5 how many moles of air are there in a 3 l container at 1 atm pressure …
A. 0.125 moles
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4 what form of the ideal gas law would you use to calculate the number …
C. \(n = \frac{PV}{RT}\)
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3 what is the partial pressure of a gas in a mixture of gases? a. the p…
A. The pressure exerted by one gas in a mixture
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2. what is the total pressure of a gas mixture containing partial press…
C. \(1.54\ \text{atm}\)
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1 what is the temperature of a gas at stp? o a. 273k o b. -273°c o c. o…
A. \(273K\)
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comprehension questions answer the questions below based article about …
1. Protons: positive charge, located in the nucleus; Neutrons: no charge, located in the nucleus; Electrons: negative charge, located in electron shells around the nucleus 2. Prot…
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contents of this page will be cut out and pasted to your notebook. pen …
| Element | Symbol | Atomic Number | Mass Number | # of Protons | # of Electrons | # of Neutrons | |---|---|---|---|---|---|---| | Helium | \(He\) | \(2\) | \(4\) | \(2\) | \(2\) …
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which drug contains the chemical thc and affects specific receptors in …
marijuana
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which of the following is a characteristic of oxygen? a colorless b odo…
E. All of these
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question 10 which of the following produces the hottest flame? a natura…
D. Acetylene and oxygen