Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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name this compound according to iupac nomenclature rules. a nitrogen ox…
C. nitrogen monoxide
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using the equation c₁₂h₂₂o₁₁ + 12o₂ -> 12co₂ + 11h₂o if 156 l of o₂ at …
0.580 mol
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match the following polyatomic ions to their names drag and drop option…
- $PO_4^{3-}$ = phosphate - $SO_4^{2-}$ = sulfate - $CO_3^{2-}$ = carbonate - $HCO_3^-$ = bicarbonate
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this is the chemical formula for nitrogen gas. this is the chemical for…
This is the chemical formula for nitrogen gas. → $\text{N}_2$ This is the chemical formula for hydrogen gas, which is highly flammable. → $\text{H}_2$ This is the chemical formula…
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which color indicates the presence of fe³⁺ when it reacts with thiocyan…
B. Blood red
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which color indicates the presence of potassium ions in a flame test? a…
D. Violet
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which of the following is not an indication of a positive test for a pa…
D. The solution retains clarity
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what happens when you add a drop of water containing silver nitrate to …
A. If chloride is present, a white solid will appear.
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what can one deduce from the reaction of chloride, bromide and iodide i…
A. If a cream - colored solid appears, bromide is present.
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which of these statements accurately describes the ions formed when ato…
C. Metals generally form cations that carry a positive charge as they lose electrons.
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elements are organized on the periodic table based on their properties.…
Calcium (Ca) is less reactive than potassium (K) because potassium atoms must lose more electrons.
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comparing reactivity of different metals rank the metals from most reac…
Silver: 3 Strontium: 1 Technetium: 2
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comparing reactivity of different metals rank the metals from most reac…
Tantalum: 2 Niobium: 3 Dubnium: 1
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marie discovers boxes of elements in a storage room. the boxes do not s…
Information about the elements' group (and period, for metals) on the periodic table. Specifically, elements in Group 1 (alkali metals, excluding hydrogen) are the most reactive m…
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which metals have similar chemical properties? check all that apply. ba…
- barium - beryllium - radium - calcium
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use the drop - down menus to classify the elements as alkali metals, al…
- Nickel (Ni): transition metal - Potassium (K): alkali metal - Cadmium (Cd): transition metal - Calcium (Ca): alkaline earth metal - Barium (Ba): alkaline earth metal
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read & respond use the text below to answer the question. bacteria in t…
D. bacteria in the soil can't break down organic waste
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which property is characterized by the ability to bend? ○ malleable ○ l…
A. malleable
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complete the rhyme scheme. what says the wind to the waving trees? what…
What says the wind to the waving trees? → A What says the wave to the river? → B Why do the rushes quiver? → B What means the sigh in the passing breeze? → A Have you not heard th…
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complete the rhyme scheme. a a a b b b white, glittering sunlight fills…
1. White, glittering sunlight fills the market square, - A 2. Spotted and sprigged with shadows. Double rows - B 3. Of bartering booths spread out their tempting shows - B 4. Of g…
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complete the rhyme scheme. a b b c c \who planted this old apple - tree…
1. "Who planted this old apple-tree?" → A 2. The children of that distant day → B 3. Thus to some aged man shall say; → B 4. And, gazing on its mossy stem, → C 5. The gray-haired …
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complete the rhyme scheme. two roads diverged in a yellow wood, and sor…
1. Two roads diverged in a yellow wood, → A 2. And sorry I could not travel both → B 3. And be one traveler, long I stood → A 4. And looked down one as far as I could → A 5. To wh…
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what is the term for a measure of how closely packed the particles of m…
Density
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read the text. during world war i, british and american warships were a…
problem-solution
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mole & gram conversion (elements) step 1) find the molar mass. step 2) …
Approximately 1.16 moles. ### Problem 2: How many grams are in 5.4 moles of Copper (Cu)?
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is this sentence in active voice or passive voice? in 1949, the u.s. fo…
active voice
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1) tell type of eqn (s=synthesis, d=decomposition, sr=single replacemen…
1. $2\text{H}_2 + \text{O}_2 ightarrow 2\text{H}_2\text{O}$ (S) 2. $2\text{H}_2\text{O}_2 ightarrow 2\text{H}_2\text{O} + \text{O}_2$ (D) 3. $4\text{Na} + \text{O}_2 ightarrow 2\t…
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determine the type of reaction. synthesis, decomposition, single replac…
1. $\boldsymbol{1\text{Li}_3\text{N} + 3\text{NH}_4\text{NO}_3 ightarrow 3\text{LiNO}_3 + 1(\text{NH}_4)_3\text{N}}$; Double Replacement 2. $\boldsymbol{3\text{Pb} + 2\text{H}_3\t…
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name ______ data table — heat of dissolution salt | nh₄cl | cacl₂ | nac…
To calculate the heat absorbed or lost for each salt, we use the formula \( Q = mc\Delta T \), where: - \( m \) is the mass of the solution (in grams), - \( c \) is the specific h…
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combustion of 2.50 g ch₄ results in the absorption of energy by the cal…
\(-892\) (or more precisely \(-891.5\) if we keep more decimals, but with 3 sig figs it's \(-892\))
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2.50 g ch₄ reacts with excess o₂ in a bomb calorimeter containing 400.0…
139.34 (rounded to two decimal places, or as per significant figures, but the problem says magnitude only, so we can present it as approximately 139 or 139.34. If we calculate mor…
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2.50 g ch₄ reacts with excess o₂ in a bomb calorimeter containing 400.0…
89.452
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0.500 g c₃h₈ reacts with excess o₂ in a bomb calorimeter containing 500…
-2220 (or -2223, depending on rounding, but likely -2220 with three sig figs)
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0.50 g of mg reacts with excess oxygen in a bomb calorimeter. the overa…
\(-592\) (rounded to three significant figures, the original calculation gives approximately - 591.7 which rounds to - 592)
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calculate the enthalpy, in kj/mol, for the combustion of the hydrocarbo…
$-3220$ (or $\boldsymbol{-3.22\times10^{3}}$)
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0.235 g of a hydrocarbon reacts with excess oxygen in a bomb calorimete…
$\frac{0.235}{122.118}$ (or approximately $0.001924$ if calculated, but as per instruction, do not round, so keep the fraction form or the unrounded decimal)
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a hydrocarbon reacts with oxygen in a bomb calorimeter containing 2.00 …
+6184.564
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the combustion of 4.00 grams of milk in a bomb calorimeter resulted in …
\( \boxed{248} \) (or approximately \( 247.9 \) depending on rounding, but \( 248 \) is a common result here)
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49,936.64 j of energy are released when 0.015475 mol c₆h₅cooh react. wh…
-3230
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what is the heat of reaction (q_rxn), in joules, when q_cal = 49,936.64…
\(-49936.64\)
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the calorimeter contains 900. g of water and the temperature change is …
\( +49900 \, \text{J} \) (or more precisely \( +49938 \, \text{J} \), or \( +5.00\times10^4 \, \text{J} \))
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1.890 g of benzoic acid, c₆h₅cooh, burns in a calorimeter. how many mol…
\( 0.01548 \) (or more precise value from calculation, e.g., \( \approx 0.01548 \))
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overall question: 1.890 g of benzoic acid, c₆h₅cooh, reacts in a calori…
\(8.32\)
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calculate the enthalpy of combustion of n₂h₄ using the data from the pr…
-665.1
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during the reaction, the water temperature rises from 25.00 to 28.54 °c…
-20744.4
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a 1.000 g sample of the rocket fuel hydrazine, n₂h₄, is burned in a bom…
\(\frac{1.000}{32.046}\) (or approximately 0.031205 if calculated, but as per instruction, do not round, so keep as \(\frac{1}{32.046}\) or 1/32.046)
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what temperature increase would be expected if the same 1.200 g sample …
\(4.82\)
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the overall heat capacity of the calorimeter is 8.67 kj/ °c. if the cal…
2.39
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under constant volume conditions, the heat of combustion of benzoic aci…
-31.66
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the qrxn is -11,500 j when 17.6 g hcl dissolves in water. what is the e…
\(-23.8\) (or more precise calculation: \(\frac{-11500\ J}{17.6\ g}\times\frac{36.458\ g}{1\ mol}\times\frac{1\ kJ}{1000\ J}=\frac{-11500\times36.458}{17.6\times1000}\approx -23.8…
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when 17.6 g hcl dissociates in 55.0 g of water in a coffee cup calorime…
\(-11488\)
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when 17.6 g hcl dissociates in 55.0 g of water in a coffee cup calorime…
\(+11263\) (rounded to a reasonable number of significant figures, or keeping the precise value as \(+11262.8736\) which can be rounded to \(+11263\))
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when 17.6 g hcl dissociates in 55.0 g of water in a coffee cup calorime…
\( +188.16 \)
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hcl + naoh → nacl + h₂o 25.0 ml of 1.00 m hcl is added to 75.0 ml of 1.…
-148 kJ/mol (or -148.4 kJ/mol depending on precision)
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hcl + naoh → nacl + h₂o 25.0 ml of 1.00 m hcl is added to 75.0 ml of 1.…
102
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h₂so₄ + 2koh → k₂so₄ + 2h₂o 50.0 ml of 2.00 m h₂so₄ is added to 50.0 ml…
\(-123\) (or \(-123.4\))
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h₂so₄ + 2koh → k₂so₄ + 2h₂o 50.0 ml of 2.00 m h₂so₄ is added to 50.0 ml…
0.0500
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h₂so₄ + 2koh → k₂so₄ + 2h₂o 50.0 ml of 2.00 m h₂so₄ is added to 50.0 ml…
100.0
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agno₃ + hcl → agcl + hno₃ 50.0 ml of 0.20 m agno₃ is added to 50.0 ml o…
-69.4
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agno₃ + hcl → agcl + hno₃ 50.0 ml of 0.20 m agno₃ is added to 50.0 ml o…
\(0.010\)
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agno₃ + hcl → agcl + hno₃ 50.0 ml of 0.20 m agno₃ is added to 50.0 ml o…
\(-694\) (or more precisely \(-694.4\))
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agno₃ + hcl → agcl + hno₃ 50.0 ml of 0.20 m agno₃ is added to 50.0 ml o…
\(102\)
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h₂so₄ + 2koh → k₂so₄ + 2h₂o 30.0 ml of 1.30 m h₂so₄ is added to 25.0 ml…
-88.4
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h₂so₄ + 2koh → k₂so₄ + 2h₂o 30.0 ml of 1.30 m h₂so₄ is added to 25.0 ml…
\(0.0250\)
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h₂so₄ + 2koh → k₂so₄ + 2h₂o 30.0 ml of 1.30 m h₂so₄ is added to 25.0 ml…
\(-2210\) (or \(-2206\) if more precise)
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h₂so₄ + 2koh → k₂so₄ + 2h₂o 30.0 ml of 1.30 m h₂so₄ is added to 25.0 ml…
\(55.0\)
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the $q_{rxn}$ is -90,100 j when 19.55 g k dissociates in water. what is…
-180.2
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when 19.55 g of solid k dissociates in 500.0 g of water in a coffee cup…
\(-90100\)
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when 19.55 g of solid k dissociates in 500.0 g of water in a coffee cup…
\( +90100 \) (rounded to a reasonable number of significant figures, or \( +90135 \) if we keep more precision)
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when 19.55 g of solid k dissociates in 500.0 g of water in a coffee cup…
519.55
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the qrxn is -4,610 j when 1.00 g k dissociates in water. what is the en…
-180 kJ/mol (or more precisely -180.3 kJ/mol, depending on rounding)
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when 1.00 g of solid k dissociates in 500.0 g of water in a coffee cup …
\(-4610\)
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when 1.00 g of solid k dissociates in 500.0 g of water in a coffee cup …
+4607.2 (or approximately +4607, depending on rounding preferences)
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when 1.00 g of solid k dissociates in 500.0 g of water in a coffee cup …
501.0
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agno₃ + nacl → agcl + nano₃ 75.0 ml of 0.500 m agno₃ reacts with 35.0 m…
\(0.0375\)
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2hcl + mg → mgcl₂ + h₂ calculate δh for the reaction. qᵣₓₙ = -9240 j 0.…
\(-462\)
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2hcl + mg → mgcl₂ + h₂ the 0.486 g mg was the limiting reactant for the…
\( 0.0200 \) (or approximately \( 0.02 \)) mol Mg (more precisely, using a calculator, \( 0.486\div24.305 = 0.0200 \) mol when rounded to three significant figures)
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2hcl + mg → mgcl₂ + h₂ what is the heat of the reaction? qₛₒₗₙ = +9240 …
-9240
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2hcl + mg → mgcl₂ + h₂ the initial temperature of the 41.3 g of solutio…
$+9240$ (or more precisely $+9243.6$; depending on rounding, but typically rounded to a reasonable number of significant figures. The given values have 3, 3, and 3 significant fig…
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40.0 ml of 1.0 m hcl is added to a coffee cup. then 0.486 g mg are adde…
41.286
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calculate $\\delta$h (kj/mol) for ca(oh)$_2$ in the dissociation proces…
-16.77
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recall that 7.41 g of ca(oh)₂ dissociated in this experiment. calculate…
\( 0.100 \) (or approximately \( 0.10 \) depending on significant figure requirements, but the calculation gives approximately \( 0.100 \) when considering the given values)
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what is the heat of reaction, qrxn, for the salt dissociating? ca(oh)₂ …
\(-1677\)
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the coffee cup calorimeter was determined to have a heat capacity of 8.…
+57.375
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7.41 g ca(oh)₂ dissociates in 50.0 g of water in a calorimeter. the sol…
+1620
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give the iupac name for each compound. part 1 of 2 name:
butylcyclopentane
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give the iupac name for each compound. part 1 of 3
# Explanation: ## Step1: Identify the parent chain The longest carbon chain here is determined by looking at the substituents. The central carbon is connected to a methyl ($\ce{CH…
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complete the table by typing the name of the functional group found in …
To solve for the functional groups of each organic compound, we analyze each structure: ### 1. For $\boldsymbol{\ce{H - C\equiv C - H}}$ - The structure has a carbon - carbon trip…
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part 4 of 4 which compound has the highest melting point? select octane…
octane ### Sub - question 2: Which compound has the lowest melting point?
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answer the following questions about ethane($c_2h_6$), hexane($c_6h_{14…
Octane (\(C_8H_{18}\)) ### Part 2: Which compound has the lowest boiling point?
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part 3 of 3 nacl: select organic compound inorganic compound c₃h₈: orga…
Inorganic compound
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part 3 of 3 c₃h₈: organic compound nacl: select
Ionic compound (or Salt)
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classify each chemical formula as an organic compound or an inorganic c…
s: - $\ce{Br2}$: Inorganic compound - $\ce{C3H8}$: Organic compound
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part 2 of 2 what happens to the concentration of each substance when no…
For \(\boldsymbol{[\ce{N2}]}\): increases For \(\boldsymbol{[\ce{O2}]}\): increases
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consider the reaction: n₂(g) + o₂(g) ⇌ 2no(g). part 1 of 2 what happens…
For \([NO]\): Increases; For \([O_2]\): Decreases
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part 2 of 2 what effect would decreasing the temperature have on the re…
B. Reaction rate decreases.
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consider the following reaction: no₂(g) + no(g) → n₂o(g) + o₂(g) part 1…
Reaction rate increases.
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part 2 of 3 are the reactants or products lower in energy? reactants pr…
products ### Part 3 of 3
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the combustion of propane (\\(\\ce{c_{3}h_{8}}\\)) with oxygen forms \\…
released
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part: 0 / 4 part 1 of 4 which point on the graph corresponds to product…
X