Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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subatomic particles ii objectives: use the atomic number and mass numbe…
| Symbol | Atomic Number | Mass Number | Number of Protons | Number of Electrons | Number of Neutrons | | ---- | ---- | ---- | ---- | ---- | ---- | | \(^{23}\text{Na}\) | \(11\) |…
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which of the following reactions are written correctly? you have two co…
\(2H_{2(g)}+O_{2(g)}\to2H_{2}O_{(l)}+\text{Heat}\) and \(\text{Heat}+2HgO_{(s)}\to2Hg_{(l)}+O_{2(g)}\)
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mine the number of neutrons, protons, and electrons in the following is…
| | Sulfur - 23 | Sulfur - 25 | |--|--|--| | # of protons | 16 | 16 | | # of neutrons | 7 | 9 | | # of electrons | 16 | 16 |
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which of the following is an endothermic process under room temperature…
\(H_2O_{(s)}\to H_2O_{(l)}\), \(H_2O_{(s)}\to H_2O_{(g)}\), \(H_2O_{(l)}\to H_2O_{(g)}\)
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c. determine the number of neutrons, protons, and electrons in the foll…
| | No. of protons | No. of electrons | No. of neutrons | Name of element | |---|---|---|---|---| | atomic number 9, mass number 18, charge of \(1-\) | \(9\) | \(10\) | \(9\) | Fl…
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objectives: • use the atomic number and mass number to calculate the nu…
1. Atoms of the same element with same proton number but different neutron numbers. 2. The mass number (sum of protons and neutrons). 3. By their mass numbers (due to different ne…
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describe five possible treatments for cancer.
Surgery, Chemotherapy, Radiation Therapy, Immunotherapy, Targeted Therapy
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5. what analogy is used to describe the mole in relation to everyday me…
a. The mole is like the 'chemist's dozen'
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select the correct answer. the water cycle is a biogeochemical cycle th…
B. Water can change from solid to liquid at certain points in the cycle.
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4. how is the molar mass of a compound determined? a. by measuring the …
d. By adding the atomic masses of all the atoms in the compound
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decide whether each sketch shows a sample of an element, a compound, or…
Substance X: compound, Substance Y: compound, Substance Z: mixture, Substance T: element
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here are four sketches of substances. each sketch is drawn as if a samp…
Substance X: compound, Substance Y: element, Substance Z: mixture, Substance T: compound
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what happens when the electron moves from the first energy level to the…
Energy is absorbed by the atom.
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according to the bohr model of an atom, what happens when an electron m…
Energy is absorbed and then released to form an emission line.
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which atomic model states that it is impossible to know the exact locat…
electron - cloud model
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how does the electron - cloud model describe electrons? the exact posit…
An electron has a high probability of being in certain regions.
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classify the substance shown in the sketch below. you can click the oth…
gas, pure substance, element
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atomic particles worksheet complete the table with the appropriate info…
| Element | Atomic Number | Atomic Mass | Name of Protons | Name of Neutrons | Name of Electrons | | ---- | ---- | ---- | ---- | ---- | ---- | | Fluorine | 9 | 19 | 9 | 10 | 9 | |…
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here are four sketches of pure substances. each sketch is drawn as if a…
Substance A: element, Substance B: element, Substance C: compound, Substance D: compound
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do the following statements describe a chemical or physical change? a f…
Frozen orange juice reconstitution: Physical. Flashlight beam dimming: Physical.
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question 6 in co₂, the bond between c and o is a c(sp³) - o(p) b c(sp) …
B. \(C(sp)-O(sp^{2})\)
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state of physical dependence on a drug caused by repeated usage that ch…
physiological dependence
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read the description below of a substance and an experiment on it. deci…
(can’t decide)
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severe drug - related problem characterized by impaired control over th…
chemical dependency
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a graduated cylinder is filled to the 40.00 ml mark with a mineral oil.…
Density of the ball bearing \(= 1.11\space g/cm^{3}\), Radius of the ball bearing \(= 1.87\space cm\)
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topic: bonding name: date: period 1) how many valence electrons does h …
- Gallium Bromide: \(GaBr_{3}\) - Calcium Sulfide: \(CaS\) - Potassium Oxide: \(K_{2}O\)
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1. define the term allotrope. 2. why do allotropes of the same element …
| Allotrope | Diamond | |--|--| | Type of Structure | Giant covalent lattice | | Number of Covalent Bonds per Atom | 4 | | Conducts Electricity? | No | | Hardness | Very hard | | …
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bronze is an alloy made of copper (cu) and tin (sn). calculate the mass…
\(62200\,\text{g}\) (rounded to 3 significant digits)
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chalcopyrite, the principal ore of copper (cu), contains 34.63% cu by m…
\(3.74\times 10^{6}\)
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the density of ammonia gas under certain conditions is 0.525 g/l. calcu…
\(5.25\times10^{-4}\)
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why are fossil fuels considered to be a nonrenewable energy source? whe…
C. There is a limited amount of fossil fuels, and it takes millions of years for them to form.
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calculate the mass of 6.23 moles of li₂s answer = grams (round answer t…
353.65 grams
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1 fill in the blank 1 point al₂o₃ for the formula above, there are: ato…
- atom(s) of \(Al\): \(2\) - atom(s) of \(O\): \(3\) - molar mass: \(101.96\)
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write the 1 gram equivalents of the units with the following prefixes: …
Part 1: \(1\times10^{-3}\space kg\) Part 2: \(1\times10^{9}\space ng\) Part 3: \(1\times10^{6}\space\mu g\)
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write the 1 gram equivalents of the units with the following prefixes: …
1. \(1\space g=1\times10^{- 3}\space kg\) 2. \(1\space g=1\times10^{9}\space ng\)
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for each problem, write out the formula compound. make sure you simplif…
1. \(NaF\) 2. \(MgO\) 3. \(Li_3N\) 4. \(CaF_2\) 5. \(AlF_3\) 6. \(Na_3N\)
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exit ticket questions for nearpod: 1) what is an ion? a) an atom that h…
1. a. An atom that has gained or lost electrons 2. a. Na+ 3. c. The valence electrons of an atom 4. b. 4 electrons represented by four dots around the symbol 5. b. Bromine 6. c. C…
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compounds formed by sharing electrons have ______ bonds select one: o a…
B. Covalent
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which of the following is an example of a pure substance? a. iron b. sa…
A. Iron
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redox reactions involve a series of (1 point) atoms of oxygen willingly…
Losses/gains of electrons
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a chemical reaction occurs in a beaker that youre holding in the lab. t…
It is likely exothermic.
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how many significant figures in the following numbers? 0 0027 4 3 2 1
C. 2
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how many significant figures in the following numbers? 23.0 4 3 2 1
3
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use sig figs to answer the following: (find the cut off) 56,400 - 320 =…
56100
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cles and compares find that the cost of pollution control increases alo…
B. No, as the percent of pollutants cleaned up, \(p\), approaches \(100\), the cost, \(C\), approaches infinity which is not affordable.
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cities and companies find that the cost of pollution control increases …
\(C(90)=\$3200\)
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cities and companies find that the cost of pollution control increases …
\( 1600 \)
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26. increasing an objects height above the ground increases its: a. kin…
26. d. Gravitational potential energy 27. b. Heat and light 28. a. Carrying a backpack while walking across a flat floor 29. b. The faster runner has greater power 30. c. Potentia…
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cities and companies find that the cost of pollution control increases …
\(C(20)=400\)
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cities and companies find that the cost of pollution control increases …
\(320\)
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15. a positive feedback system in the environment might cause: a) stabi…
15. C. Amplification of warming 16. C. By measuring the vibration rate of molecules 17. C. Carbon dioxide 18. A. \(CO_2\) 19. B. Flood or become uninhabitable 20. B. It would decr…
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c) grams per milliliter (g/ml) d) millimeters 8. which process best des…
- **Question 8**: B. Conduction - **Question 9**: C. It loses energy and freezes - **Question 10**: C. Mass \( \div \) Volume - **Question 11**: B. Small plastic particles found i…
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3. what is the potential energy of a 300 kilogram wrecking ball suspend…
3. \(147000\space J\) 4. \(80\space J\) 5. \(25\space N\) 6. \(90\space J\) 7. \(3125\space J\) 8. \(9.8\times 10^{9}\space J\) 9. B. Chemical → Electrical 10. B. Chemical → Mecha…
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energy equations: pe = mgh ke = ½ mv² w = f × d f = g × m p = w / t 1. …
1. - Gravitational: D - Chemical: C - Electrical: A - Elastic: E - Nuclear: B 2. - Mechanical: C - Electrical: E - Light/Solar: B - Sound: D - Thermal: A
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bellringer 1. multi-step: calculate the number of atoms in a 5.45 g sam…
\(4.31\times 10^{23}\) atoms
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what is the correct name for sno? tin monoxide tin (ii) oxide stannic o…
Tin (II) oxide
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mole, like a ream of papers, equals another number. a ream is equal to …
500
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question 8 in chemistry we use a mole to count molecules atoms anything…
anything small
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how do the radii of metallic ions compare to the radii of their neutral…
smaller
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question 9 what scientist discovered a mole? amedeo avogadro albert ein…
A. Amedeo Avogadro
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in which pair does the first atom or ion have a larger radius than the …
C. \(K, K^{+}\)
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how did mendeleev develop his periodic table of elements? by symbol by …
He arranged them by atomic mass
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quiz_chap 5_periodic table the size of cation is generally than the siz…
smaller
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how many neutrons are in boron if it has a mass of 10 and and 5 protons
5
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quiz_chap 3_periodic table in what part of the periodic table are eleme…
upper right
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what is the symbol for silicone
Si
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quiz_chap 5_periodic table the of an atom is defined as half the distan…
atomic radius
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what are families on the periodic table everything the rows the colums …
C. the columns
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quiz_chap 5_periodic table as electrons are sequentially removed from a…
more
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quiz_chap 5_periodic table based on electron configuration, which atom …
\([Ar]4s^{2}\)
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quiz_chap 5_periodic table when a metallic element forms an ion, it one…
loses
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when an atom becomes an ion, taking or giving electrons, resulting in a…
Chemical
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when an atom either gains or loses an electron isotope quark ion atom
C. Ion
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neutrons have a mass of 0 amu 1 amu 2 amu 1/2000 amu
1 amu
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what would happen to an atom if it were to lose an electron? get more n…
Get more positive
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question #15 the atoms that make up oxygen gas a share two covalent bon…
A. share two covalent bonds.
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true or false: protons, neutrons, and electrons all have the same mass.
False
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which subatomic particle has a teeny tiny insignificant mass? electrons…
Electrons
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how can you find the mass of an atom? neutrons + protons neutrons - pro…
Neutrons + Protons
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how many electrons can fit in the second orbital and beyond? 2 1 20 8
8
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what is the mass of an atom with 1 proton, 0 neutrons, and 1 electron? …
1 amu
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which subatomic particles contribute to the charge of an atom? protons …
Protons and Electrons
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if electrons are being shared unevenly in a salt compound resulting in …
Covalent
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an atom that has either lost or gained neutrons. isotope atom ion quark
Isotope
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the outlined elements have a major characteristic in common. they are a…
A. metals.
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listed in the item bank are key terms and expressions, each of which is…
- Metals: Ductile and malleable, Sodium, Magnesium, Iron - Metalloids: Semiconductor, Silicon, Germanium, Arsenic - Nonmetals: Poor conductors, Oxygen, Nitrogen, Neon
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read the excerpt. select the correct answer and press the submit button…
C. New medicines have to destroy the germs that cause illnesses without harming anyone.
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chemical potential energy transformed into radiant energy gravitational…
- Chemical potential energy transformed into radiant energy: Turning on a battery - operated light. - Gravitational potential energy transformed into kinetic energy: A child going…
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according to the equation for this chemical reaction, what does the 2 i…
C. Two atoms of silver are needed to complete the reaction
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the term \3 fecl₂\ in a balanced equation says a that there are three i…
C. that there are three formula units, each consisting of two chloride ions bonded to an iron(II) ion.
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$$ \\text{nabr}+\\text{caf}_2 \\to \\text{naf}+\\text{cabr}_2 $$ what c…
D. \(2,1,2,1\)
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14) use a periodic table to fill in all the blank spaces in the chart. …
The average atomic mass of silicon is approximately \(28.11\)
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does this follow 2feso4→fe2o3+so2+so3 model: atoms: mass: 14g does this…
| Element | # in Reactants | # in Products | |---|---|---| | Fe | 2 | 2 | | S | 2 | 2 | | O | 8 | 8 | Mass: \(14g\) (mass of reactants) \( ightarrow14g\) (mass of products) Does t…
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c₃h₈ + 5o₂ → 4h₂o + 3co₂ model: atoms: mass:
| Element | # in Reactants | # in Products | | ---- | ---- | ---- | | \(C\) | \(3\) | \(3\) | | \(O\) | \(10\) | \(10\) | | \(H\) | \(8\) | \(8\) |
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1. how much of a 100.0 g sample of ¹⁹⁸au is left after 8.10 days if its…
1. \(12.5\space g\) 2. \(7.2\space s\) 3. \(23.4375\space g\) 4. \(213000\space years\) 5. \(100\space g\)
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if 12 grams of carbon react completely with 20 grams of oxygen in a sea…
The total mass of the products will be \(32\) grams.
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why does the total mass of reactants equal the total mass of products i…
The atoms of the reactants are rearranged to form the products.
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hydrogen and oxygen are gases, but when they react to form water, the p…
Because the arrangement of hydrogen and oxygen atoms is different in water.
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what is the key difference between a subscript (like the 2 in h₂) and a…
D. A subscript shows the number of atoms in one molecule, while a coefficient shows the number
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bromomethane, $ch_3br$, is a very useful fumigant against a wide range …
The Lewis structure has $C$ as the central atom. $C$ is bonded to 3 $H$ atoms and 1 $Br$ atom. $Br$ has 3 lone pairs of electrons. So the structure is $H - C - H$ (with $C$ also b…