化学
化学反应、化学计量、分子结构与元素性质。
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label elements, compounds, and mixtures - k each circle represents an a…
Mixture of elements
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label elements, compounds, and mixtures - k each circle represents an a…
Compound
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label elements, compounds, and mixtures - k each circle represents an a…
Element
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label elements, compounds, and mixtures - k each circle represents an a…
Mixture of compounds
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a reaction at 9.0°c evolves 780 mmol of dinitrogen monoxide gas calcula…
$18\text{ L}$
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label elements, compounds, and mixtures - k each circle represents an a…
Mixture of elements and compounds
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label elements, compounds, and mixtures - k each circle represents an a…
Mixture of elements
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label elements, compounds, and mixtures - k each circle represents an a…
Compound
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a reaction between liquid reactants takes place at ( 4.0^{circ}c ) in a…
\(0.23\space atm\)
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chlorine pentafluoride gas is collected at 17.0°c in an evacuated flask…
mass: \(11\space g\) mole: \(0.086\space mol\)
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incorrect your answer is wrong. in addition to checking your math, chec…
\(0.60\ cm^{3}\)
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fluorine gas and water vapor react to form hydrogen fluoride gas and ox…
\(6.0\ cm^{3}\)
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7. balance the following reactions: (2 marks) 2a) 2 ko₂(s) + 2 co₂(g) →…
a) \(4KO_2(s)+2CO_2(g)=2K_2CO_3(s)+3O_2(g)\) b) \(2C_8H_{18}(l)+25O_2(g)=16CO_2(g)+18H_2O(g)\)
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for many purposes we can treat propane $(c_{3}h_{8})$ as an ideal gas a…
decrease; \(-5\%\)
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an arctic weather balloon is filled with 33.7 l of helium gas inside a …
\(32.4\space L\)
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7. balance the following reactions: (2 marks) a) ko₂(s) + co₂(g) → k₂co…
# Explanation: ## Step1: Balance the potassium atoms in[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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a marine biologist is preparing a deep - sea submersible for a dive. th…
\(13.6\ atm\)
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a cylinder is filled with 10.0 l of gas and a piston is put into it. th…
\(34.9\ \text{kPa}\)
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use the periodic table to determine the electron configuration for dysp…
Dy: \([Xe]6s^{2}4f^{10}\) Am: \([Rn]7s^{2}5f^{7}\)
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use the periodic table to determine the electron configuration for dysp…
\([Xe]6s^{2}4f^{10}\)
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how many electrons would be found in the ion whose symbol is given belo…
\(54\)
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read the descriptions of rhyme schemes below. free verse: poetry that d…
free verse
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use the periodic table to identify the number of core electrons and the…
core electrons: \(18\) valence electrons: \(1\)
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use the periodic table in the tools bar to complete the electron config…
\(A = 2\), \(B = 1\)
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read the text. when a person ingests caffeine, whether in the form of a…
sequential
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a thermometer is placed in water in order to measure the waters tempera…
The molecules in the thermometer's liquid spread apart.
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decide whether each chemical reaction in the table below is an oxidatio…
- For \(FeO(s)+CO(g)\to Fe(s)+CO_{2}(g)\): - redox reaction? yes - reducing agent: \(CO\) - oxidizing agent: \(FeO\) - For \(2H_{2}S(g)+O_{2}(g)\to 2S(s)+2H_{2}O(l)\): - redox rea…
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which statement describes the 3d, 4s, and 4p orbitals of arsenic (as) b…
The 3d and 4s orbitals are completely filled, and the 4p orbital is partially filled.
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which phrase describes one characteristic of radioactive elements? are …
decay at a constant rate
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question 8 (1 point) use the following information to answer the next q…
898.16 kJ is absorbed
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what is the formula for chloric acid? hclo, hcl hclo hcoh
\(HClO_3\)
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vygotsky believed that learning primarily occurred through_________. a.…
C. one's social interactions with others
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for each reaction, write the chemical formulae of the oxidized reactant…
1. Reactants oxidized: \(Al\); Reactants reduced: \(FeBr_{3}\) 2. Reactants oxidized: \(Ca\); Reactants reduced: \(ZnCl_{2}\) 3. Reactants oxidized: \(Mg\); Reactants reduced: \(F…
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use the periodic table to determine the electron configuration for zinc…
Zn: \([Ar]4s^{2}3d^{10}\) Tc: \([Kr]5s^{2}4d^{5}\)
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the partial pressure of oxygen in the atmosphere is 0.2095 atm. calcula…
\(21.23\space kPa\)
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7. balance the following reactions: (2 marks) a) ko₂(s) + co₂(g) → k₂co…
\(4KO_{2}(s)+2CO_{2}(g) ightarrow 2K_{2}CO_{3}(s)+3O_{2}(g)\)
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if a -1 ion has 10 electrons, what element is it? neon (ne) sodium (na)…
fluorine (F)
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if a -2 ion has 34 protons, what element is it? germanium (ge) selenium…
selenium (Se)
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give the ion symbol for the ion that has 27 protons and 24 electrons.
\(Co^{3 +}\)
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if an ion has 26 protons and 24 electrons, what is the charge on the io…
\(+2\)
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how many electrons would be found in the ion whose symbol is given belo…
\(10\)
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use the periodic table to write the electron configuration for barium (…
\[ [\text{Xe}]6s^{2} \]
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use the periodic to write the electron configuration for rubidium (rb) …
\(5\)
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magnesium (mg): 1s²2s²2p⁶3s² core electrons valence electrons
core electrons: \(1s^{2}2s^{2}2p^{6}\), valence electrons: \(3s^{2}\)
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number of core electrons and the number of valence electrons argon (ar)…
core electrons: 10; valence electrons: 8
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iron (fe): ar4s²3d⁶ core electrons valence electrons
core electrons: [Ar]; valence electrons: 4s²3d⁶
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if a test sample burns fully in a calorimetry experiment, what has it r…
complete degradation
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what is the hybridization of the central atom in ch₂o? sp sp² sp³ sp³d
\(sp^{2}\)
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16. phosphorus trichloride 17. diphosphorus pentoxide 18. dinitrogen pe…
# Explicación breve: Para nombrar compuestos binarios moleculares (compuestos formados por no metales), se sigue la siguiente regla: 1. El primer elemento en el nombre es el prime…
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which element does the electron configuration 1s²2s²2p² represent? o e …
B. C
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which is the electronic configuration for oxygen? 1s² 2s² 2p¹ 1s² 2s² 2…
\(1s^{2}2s^{2}2p^{4}\) (the third option)
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which of these elements has an electron configuration of kr5s²? barium …
strontium
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in which block of the periodic table is chromium (cr) found? s block d …
B. d block
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it is easier to determine the electron configurations for the p - block…
their electrons are assigned to s and p orbitals only.
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which is the noble - gas notation for lead (pb)? rn6s²4f¹⁴5d¹⁰6p² rn6s²…
\(\text{[Xe]}6s^{2}4f^{14}5d^{10}6p^{2}\) (the third option)
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hydrogen reacts with an element to form a compound. which element would…
chlorine
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what is the number of valence electrons in cadmium (cd)? 1 2 10 12
2
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covalent compounds worksheet formula writing and naming 1. so₃ 2. co 3.…
1. Trióxido de azufre 2. Monóxido de carbono 3. Dicarbonuro de azufre 4. Tetracloruro de carbono 5. Óxido nitroso (monóxido de dinitrógeno) 6. Trisulfuro de diarsénico 7. Triyodur…
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what is the number of valence electrons in cadmium (cd)? 1 2 10 12
2
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which element does the electron configuration 1s²2s²2p² represent? ○ b …
C. C
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in which block of the periodic table is uranium (u) found? s block d bl…
f block
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alchemists tried to turn base metals into submit answer skip text multi…
gold
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which statement describes the 3d, 4s, and 4p orbitals of arsenic (as) b…
The 3d and 4s orbitals are completely filled, and the 4p orbital is partially filled.
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alchemists tried to turn base metals into choose... oxygen gold lead si…
gold
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alchemy was practiced _____. by modern chemists by renaissance scientis…
in the Middle Ages
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directions: drag the tiles to the correct boxes. which sentences from t…
| Sentences | Problem/Solution | |--|--| | During the study period, the city of Madison used leaf collection, street cleaning, and leaf blowers to remove leaf litter from resident…
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10. what is an electron? 11. how many electrons can be held in the: 1st…
10. An electron is a negatively - charged sub - atomic particle. 11. 1st shell: 2; 2nd shell: 8; 3rd shell: 18.
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10. what is an electron? 11. how many electrons can be held in the: 1st…
10. An electron is a negatively - charged sub - atomic particle. 11. - 1st shell: 2 electrons - 2nd shell: 8 electrons - 3rd shell: 18 electrons
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part 5: chemical name from formula _/20 instructions: write the name of…
| IUPAC Name | Chemical Formula | |---|---| | Rubidium oxide | $Rb_{2}O$ | | Aluminum chloride | $AlCl_{3}$ | | Magnesium sulfide | $MgS$ | | Barium nitride | $Ba_{3}N_{2}$ | | Zi…
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if silicon has an atomic number 14 and mass 28, how many neutrons does …
\( 14 \)
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from the following options, select three that are functions of water. c…
Regulation of body temperature, Lubrication of joints, Participant in chemical reactions
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question 5 during a phase change, why does the temperature stay the sam…
During a phase change, the temperature remains constant while heat is added because the heat energy is utilized to overcome intermolecular forces and change the state of the subst…
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you build a rectangular raised garden bed to grow the organic vegetable…
The length is about \(6\) feet, and the width is about \(3\) feet.
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match each phase change to the correct description. answer choices: see…
- "A gas becomes a solid by losing enough energy, skipping the liquid phase" → Deposition - "Enough heat is added for a liquid to become a gas" → Boiling - "Enough heat is removed…
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the alcohol particles gained heat as they turned into gas question 3 wh…
Adding heat causes particles to move more and lose their shape.
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part c - characteristics and properties - vocabulary directions: fill i…
16. Ionization Energy 17. Atomic radius 18. Electronegativity 20. Boiling point 22. Density 23. Boiling point
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question 2 why did the rubbing alcohol on the instructors hand feel col…
The alcohol particles gained heat as they turned into gas.
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which instrument is used to measure an intensive property?
The first instrument (thermometer).
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chemical compounds assessment part 1: interpreting chemical formulas _/…
| Chemical Compound | Elements in Compound and Number of Atoms | | --- | --- | | \(H_2O\) | \(H = 2\), \(O = 1\) | | \(CO_2\) | \(C = 1\), \(O = 2\) | | \(CH_4\) | \(C = 1\), \(H …
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true or falsemixtures that have been combined/mixed together can be sep…
True
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a substance is floating in water, the substance does not settle to the …
B. A suspension
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separating particles based on size is called ______? decantation chroma…
filtration
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what is a sign of a chemical change? compressing stretching bubbles for…
Bubbles forming
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single red crystal is heated as the temperature heats up it begins to b…
C. A compound
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evidence of a physical change is a________, light produced change in st…
change in state of matter
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what kind of physical property is this? boiling point
Intensive
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how many total atoms of each element are present in the following formu…
Hydrogen (\(H\)): \(17\) Oxygen (\(O\)): \(36\) Phosphorus (\(P\)): \(11\)
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how many total atoms of each element are present in the following formu…
Hydrogen (\(H\)): \(14\) Sulfur (\(S\)): \(8\) Oxygen (\(O\)): \(30\)
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how many total atoms of each element are present in the following formu…
Aluminum (\(Al\)): \(16\) Chlorine (\(Cl\)): \(12\) Sulfur (\(S\)): \(9\) Oxygen (\(O\)): \(36\)
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14. scientists is investigating whether erosion along the padma river i…
Collect and test water samples at multiple points affected by agricultural runoff.
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how many total atoms of each element are present in the following formu…
Calcium (\(Ca\)): \(11\) Chlorine (\(Cl\)): \(12\) Oxygen (\(O\)): \(26\) Hydrogen (\(H\)): \(10\)
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how many total atoms of each element are present in the following formu…
Hydrogen (\(H\)): \(12\) Sulfur (\(S\)): \(2\) Oxygen (\(O\)): \(10\)
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a stream table would be a useful tool to collect data for an investigat…
the impact of a river's slope and flow speed on the rate of erosion and deposition
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stoichiometry & percent yield worksheet show all work! % yield = \\( \\…
1. $\ce{2FePO4 + 3Na2SO4 ightarrow Fe2(SO4)3 + 2Na3PO4}$ 2. Approximately $33.2\ \text{g}$ 3. Approximately $55.7\%$ 4. The percent yield of approximately $55.7\%$ is reasonable. …
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8. the base sr(oh)₂ is used to neutralize 25.00 ml of the acid hcl acco…
The concentration of \(HCl\) is \(0.149\space M\) For question 9:
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select the text from the paragraph that best helps you understand that …
"While most scientific findings are the result of deliberate and carefully designed experiments, occasionally a major discovery happens in a more fortuitous way."
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question 5 select three unique properties of water. water can absorb a …
- Water can absorb a lot of energy without changing temperature - Frozen water floats - Water molecules can stick to each other
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attractions between water molecules are called hydrogen bonds. ionic bo…
hydrogen bonds.
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what is energy primarily described as? a form of light the ability to p…
The ability to perform labor
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a molecule that has a partial positive charge on one side and a partial…
polar molecule.