Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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what is the electron configuration for this particle? cl⁻ 1s² 2s² 2p⁶ 3…
1s² 2s² 2p⁶ 3s² 3p⁶
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is the particle represented by the electron configuration below paramag…
paramagnetic
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what is the last portion of the electron configuration for technetium, …
4d⁵
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what element does this orbital diagram represent?nearkna
D. Na
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which of these statements explains the trend in first ionization energy…
The increasing number of protons and electrons results in an increase in electrostatic charge.
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experimental adjustment using the beer-lambert law determination of per…
Diluting the unknown sample, as the unknown sample concentration is too high.
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anthocyanin experiment determining concentration anthocyanins are red o…
3.1x10⁻⁴ M
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identify a set of quantum numbers for the last electron added to the su…
$3, 1, 0, -\frac{1}{2}$ (Note: $m_l$ can also be $+1$ or $-1$, and $m_s$ could be $+\frac{1}{2}$ if considering the first electron in a new p orbital, but the above is a standard …
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this is an example of a \p\ orbital. how many p orbitals can exist in a…
A. 3
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the electromagnetic spectrum and electronic transitionsenergy of o=o bo…
D. 498 kJ/mol
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the electromagnetic spectrum and electronic transitions energy of light…
B. 8.28 x 10⁻¹⁹ J
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the electromagnetic spectrum and electronic transitionsfrequency of lig…
statement I
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consider the following particles in light of periodic trends and atomic…
$S^{2-}, S^-, S, S^+$
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consider the following particles in light of periodic trends and atomic…
$S^+, S, S^-, S^{2-}$
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hcl vs. hf which choice is a true statement about these two particles? …
The HF has a stronger attractive force than HCl due to its smaller atom size.
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na$_2$s vs. k$_2$s which choice is a true statement about these two par…
The K⁺ is larger than the Na⁺ because electrons occupy energy levels further from the nucleus.
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consider this balanced equation.$ce{na_{2}s(aq) + 2hcl(aq) -> h_{2}s(g)…
$\text{S}^{2-}(aq) + 2\text{H}^+(aq) ightarrow \text{H}_2\text{S}(g)$ (Option 1)
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aqueous sodium sulfide reacts with hydrochloric acid. what is the balan…
Na₂S(aq)+2HCl(aq) → H₂S(g)+2NaCl(aq)
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which of the following bonds exhibits the greatest difference in electr…
H-Cl
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the reaction for electron affinity for several elements is given. which…
Se + e⁻ → Se⁻
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how is the electronegativity of metals related to that of non-metals? t…
The electronegativity of metals is lower than that of non-metals.
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the reaction for electron affinity for several elements is given. which…
C. $\text{C} + \text{e}^- ightarrow \text{C}^-$
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considering the following atoms, rank them in terms of increasing elect…
Sb < As < P < N
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considering sodium and magnesium, which statement explains their respec…
Na is more likely to gain an electron because it will then have a full valence shell.
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rank the atoms br, i, cl, and at by increasing electron affinity. i < a…
At < I < Br < Cl
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what are the overall trends in electronegativity? in general, electrone…
from top to bottom and right to left on the periodic table.
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the reaction for electron affinity for several elements is given. which…
Cl + e⁻ → Cl⁻
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the first ionization energy for sodium is 496 kj/mol. which equation re…
496 kJ + Na→Na⁺ + e⁻
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which equation represents the first ionization energy for an atom? $x^+…
X→X⁺+e⁻
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the first ionization energy for calcium is 590 kj/mol. which equation r…
1145 kJ + Ca⁺ → Ca²⁺ + e⁻
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which equation represents the second ionization energy for an atom?$x^+…
$X^+ ightarrow X^{2+} + e^-$
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ionization energy 3rd period elements the data table represents the ion…
element 3
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the first ionization energy for calcium is 590 kj/mol while for stronti…
The strontium's valence electrons are further from the nucleus and experience less attractive force.
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ionization energy 2nd group elements the data table represents the ioni…
element 1
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size trends atomic radius consider your knowledge about the behavior of…
Statement III
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which particle represents a model of a chloride ion in comparison to th…
B
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rank the following atoms and ions in order of decreasing size. li⁺, be²…
H⁻, He, Li⁺, Be²⁺, B³⁺
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rank the following atoms in order of increasing size. mg, si, ca, ge mg…
Si, Mg, Ge, Ca
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rank the following atoms and ions in order of decreasing size. br⁻, se²…
D. Se²⁻, Br⁻, Kr, Rb⁺, Sr²⁺
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2 \text{F}_2(\text{g}) + \text{O}_2(\text{g}) ightarrow 2 \text{OF}_2(\text{g})$
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2 \text{ F}_2(\text{g}) + \text{O}_2(\text{g}) ightarrow 2 \text{ OF}_2(\text{g})$
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here are four sketches of substances. each sketch is drawn as if a samp…
- Substance X: compound - Substance Y: mixture - Substance Z: mixture - Substance T: element
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write the electron configuration for a neutral atom of chlorine.
$1s^2 2s^2 2p^6 3s^2 3p^5$
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write the electron configuration for an aluminum cation with a charge o…
$1s^22s^22p^63s^2$
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write the electron configuration of an atom of the element highlighted …
$1s^22s^22p^4$
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in progress check for understanding: mechanical engineering not graded …
Forces, heat transfer, material strength, and fluid mechanics
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in progress check for understanding: mechanical engineering not graded …
Forces, heat transfer, material strength, and fluid mechanics
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after measuring the solid and selecting the appropriate glassware, whic…
Add calcium nitrate to the glassware. Then add a small volume of water to the glassware and swirl to dissolve the calcium nitrate. Fill the glassware with water to the 250.0 mL ma…
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to accurately and precisely prepare the solution, the solid calcium nit…
beaker
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part 1 of 3 you have been asked to make 250.0 ml of a 0.100 m solution …
$4.10\ \text{g}$
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some measurements of the initial rate of a certain reaction are given i…
$\text{rate} = k[\text{H}_2][\text{I}_2]$ $k = 29\ M^{-1}s^{-1}$
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quiz 3 - sp24quiz instructionsthis quiz is due thursday 1/30 by 11:59pm…
### Question 1: - Do organic vegetables taste better than conventionally grown vegetables? → Aesthetic - Is it worthwhile to pay more for organic food? → Moral - What does "animal…
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6. sinkholes and caves can form when limestone is dissolved. what chemi…
carbonic acid in groundwater
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7 what makes the top layers of soil darker in color than the lower laye…
D. a large amount of organic matter
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5. desert pavement forms when ______.○ chemical weathering occurs○ wind…
wind blows away loose sand
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part 2 of 2 write the net ionic equation for the reaction of aqueous ni…
$$3\text{Ni}^{2+}(aq) + 2\text{PO}_4^{3-}(aq) ightarrow \text{Ni}_3(\text{PO}_4)_2(s)$$
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part 1 of 2 a dropper bottle labeled as solution 2 contains a pale gree…
○ nickel(II) ion
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a student mixes 1.0 ml of aqueous silver nitrate, $ce{agno_{3}(aq)}$, w…
The mixture appears to be white and cloudy.
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part 3 of 4 1. the white precipitate formed in the reaction between $(n…
1. The white precipitate formed in the reaction between $\ce{(NH4)3PO4}$ and $\ce{CdBr2}$ is $\ce{Cd3(PO4)2}$. 2. The white precipitate formed in the reaction between $\ce{LiOH}$ …
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part 1 of 4 identify the precipitate formed in each of the following re…
$\text{Fe(OH)}_3$ (Iron(III) hydroxide)
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3. what types of weapons were developed specifically for trench warfare…
3. Weapons developed for trench warfare included barbed wire, machine guns, mortars, and hand grenades. They were necessary to counter the static, fortified trench lines, as tradi…
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unit 5: mass-mole-molecules in compounds the mole in a formula the smal…
1. $2.17 \times 10^{24}$ formula units of NaCl 2. $13.3$ moles of $\text{H}_2\text{O}$ 3. $3.37 \times 10^{22}$ molecules of $\text{C}_6\text{H}_{12}\text{O}_6$ 4. $142.05\ \text{…
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atoms of elements use the molar mass of the element to convert from g t…
10. $0.0173\ \text{mol radium}$ 11. $2433\ \text{mol mercury}$ 12. $3.88 \times 10^{-5}\ \text{mol arsenic}$ 13. $2.44 \times 10^{-7}\ \text{grams neon}$ 14. $1.33 \times 10^{20}\…
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unit 3-part ii: molecules and bonding what is a crystal lattice: draw a…
1. A crystal lattice is a regular, repeating three-dimensional arrangement of particles (atoms, ions, or molecules) in a crystalline solid. 2. (Diagram description for MgO lattice…
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unit 5: mass-mole-atoms of elements using avogadros number, determine t…
1. $1.51 \times 10^{23}$ atoms of Ag 2. $5.15 \times 10^{21}$ atoms of Na 3. $2.13 \times 10^{25}$ atoms of Bi 4. $5.40 \times 10^{-4}$ mol of Lead (Pb) 5. $8.24$ mol of Gold (Au)…
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empirical and molecular formulas worksheet objectives: • be able to cal…
1. $\boldsymbol{C_2H_6O}$ 2. $\boldsymbol{Au_2O_3}$ 3. $\boldsymbol{N_2H_8SO_4}$ (or $\boldsymbol{(NH_4)_2SO_4}$) 4. $\boldsymbol{C_6H_{12}O_6}$ 5. $\boldsymbol{C_2H_6O_2}$
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question 10 2 points a pound of organic asparagus is $2.49, a pound of …
6.92
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which brand name corresponds to the gastrointestinal drug with the gene…
1. B. Nexium 2. C. The biochemical and physiological effects of drugs
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lewis structures, vsepr, polarity, im forces for each of the following …
1. **Carbon tetrafluoride ($\text{CF}_4$)** - Lewis Structure: Central C with 4 single bonds to F; each F has 3 lone pairs - Shape: Tetrahedral; Bond angle: $109.5^\circ$ - Polari…
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unit 3-part ii: molecules and bonding define sea of electrons: why are …
1. Sea of Electrons: A model for metallic bonding where valence electrons of metal atoms are delocalized, forming a "sea" of freely moving electrons surrounding positively charged…
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some scientists have the following hypothesis: atypical signals from se…
If the scientists' hypothesis is correct, blocking atypical signals will **stop** phantom pain. So, the hypothesis is best supported if **no** patients report that they feel phant…
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some scientists have the following hypothesis: atypical signals from se…
Corrected statement: If the scientists' hypothesis is correct, blocking atypical signals **would** stop phantom pain. So, the hypothesis is best supported if **all (or most)** of …
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15. chemical weathering due to a metallic element reacting with oxygen
This process is called **oxidation** (a specific form of chemical weathering; for example, iron reacting with oxygen to form iron oxide/ rust, which weathers iron-rich rocks).
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electron shells valence electrons electrons atoms molecules electron di…
1. The **atoms** of each element have a characteristic number of **electrons** arranged in **electron shells**. The number of **valence electrons** determines what types of bonds …
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question 28 (1 point)listenrank the following atoms in order of increas…
Question 28 (increasing atomic radius, lowest to highest): 1. Argon (Ar) 2. Silicon (Si) 3. Calcium (Ca) 4. Cesium (Cs) Question 29 (decreasing atomic radius, highest to lowest): …
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question 26 (1 point)listenrank the following atoms in order of decreas…
Question 26 (highest to lowest): 1. Fluorine (F) 2. nitrogen (N) 3. Beryllium (Be) 4. Rubidium (Rb) Question 27 (lowest to highest): 1. Rubidium (Rb) 2. Calcium (Ca) 3. Silicon (S…
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question 24 (1 point)listenrank the following atoms in order of increas…
Question 24 (increasing IE₁, lowest to highest): 1. barium (Ba) 2. calcium (Ca) 3. arsenic (As) 4. nitrogen (N) Question 25 (decreasing IE₁, highest to lowest): 1. oxygen (O) 2. s…
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question 23 (1 point)listenwhich of the following is named correctly? c…
a) $\text{Na}_2\text{SO}_3$(aq) sodium sulfite b) $\text{NaNO}_2$ sodium nitrite e) $(\text{NH}_4)_2\text{CO}_3$ ammonium carbonate
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question 22 (1 point)listenwhich of the following is named correctly? c…
a) $\text{(NH}_4\text{)}_2\text{SO}_3$ ammonium sulfite c) $\text{PBr}_3$ phosphorus tribromide e) $\text{LiBrO(aq)}$ lithium hypobromite
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question 21 (1 point)listenwhich of the following is named correctly? c…
b) $\text{SO}_3$ - sulfur trioxide d) $\text{Na}_3\text{PO}_2$ - sodium hypophosphite e) $\text{KBr}$ - potassium bromide
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question 20 (0.5 points)listenwhich of the following are halogens?a) ox…
b) iodine f) chlorine g) fluorine
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question 19 (0.5 points)listenwhich of the following are pnictogens?a) …
c) nitrogen g) arsenic
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question 18 (0.5 points)listenwhich of the following are noble gases?a)…
b) argon g) xenon h) krypton
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question 17 (0.5 points)listenwhich of the following are chalcogens?a) …
c) oxygen f) selenium
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question 15 (0.5 points) listen what is the identity of the ion with an…
Question 15: D. $\text{Nb}^{2+}$ Question 16: B. $\text{S}^{2-}$
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question 13 (0.25 points)listenwhat is the identity of the ion with an …
Question 13: B. $\text{Ga}^{3+}$ Question 14: A. $\text{Sn}^{4+}$
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question 11 (0.5 points)listenwhich of the following are named correctl…
- $\text{PCl}_5$: phosphorus pentachloride - $\text{Cl}_2\text{O}_5$: dichlorine pentoxide --- ### Question 12
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question 9 (0.5 points)listenwhich of the following species are isoelec…
## Question 9 c) $\text{Mg}^{2+}$ d) $\text{O}^{2-}$ ## Question 10 CuO: Copper(II) oxide
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question 7 (0.25 points)listenaccording to periodic trends, which metal…
Question 7: Fr Question 8: a) $\text{Cl}^-$, b) $\text{K}^+$
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question 4 (0.25 points)listenwhat is the electron configuration of a c…
Question 4: [Ar]3d⁷ Question 5: [Ar]4s²3d¹⁰4p⁶ Question 6: p-block, group 7A, and period 4
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question 1 (0.25 points)listenwhat is the ground-state electron configu…
Question 1: $1s^22s^22p^6$ Question 2: $[Ar]4s^23d^8$ Question 3: $[Ar]3d^8$
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question 3 1 pts how much volume does 3 moles of gas occupy at standard…
Question 3: 67.2 L Question 4: A microwave Question 5: 41 atm
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ionic bonds and ionic compounds1. look at the diagram shown above and a…
1. a. $\text{NH}_4^+$, $\text{Mg}^{2+}$, $\text{Al}^{3+}$ b. $\text{Cl}^-$, $\text{O}^{2-}$, $\text{PO}_4^{3-}$ 2. Ionic compounds are made of positively charged cations and negat…
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molarity 1. what is the molarity of a solution in which 58g of nacl are…
1. $\approx 1.0\ \text{M}$ 2. $\approx 0.118\ \text{M}$ 3. $101\ \text{g}$ (rounded) 4. $\approx 0.27\ \text{L}$ (or $270\ \text{mL}$) 5. $2.5\ \text{g}$ (rounded) 6. $\approx 0.0…
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cameras through time 2. who created the term photography? a the person …
C. the scientist who discovered a chemical that reacts to light
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$2kclo_3 \ ightarrow 2kcl + 3o_2$ how many grams of potassium chloride …
1. $\approx 15.2$ grams of potassium chloride 2. $\approx 10.8$ grams of hydrogen 3. $\approx 60.8$ grams of ammonia 4. $\approx 4.2$ grams of silver chloride 5. $\approx 3.1$ gra…
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$n_2 + 3h_2 ightarrow 2nh_3$ what volume of hydrogen is necessary to re…
1. 15 liters of hydrogen 2. 10 liters of ammonia 3. 12 liters of carbon dioxide 4. 15 milliliters of oxygen 5. 75 liters of carbon dioxide; 37.5 liters of oxygen
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practice: le chateliers principle directions: complete the chart below …
| Stress | Direction Favored | [SO₂] | [O₂] | [SO₃] | |-------------------|-------------------|-------------|-------------|-------------| | Add SO₂ | forward | - | decrease | incr…
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problems 1. $ce{n_{2} + 3h_{2} -> 2nh_{3}}$ how many moles of hydrogen …
1. 6 moles 2. 9 moles 3. 3 moles 4. 20 moles 5. 6 moles
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(true formulas) name _______________ solve the problems below 1. the em…
1. $\text{N}_2\text{O}_4$ 2. $\text{C}_5\text{H}_{10}$ 3. $\text{C}_2\text{H}_4\text{O}_2$ 4. $\text{C}_4\text{H}_{10}\text{O}$ 5. $\text{C}_4\text{H}_8\text{O}_2$