Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
-
which is the name for $ce{sio_{2}}$?○ silicon dioxide○ silicon trioxyge…
silicon dioxide
-
conclusion questions: 1. in which state of matter was the milk when you…
1. Question 4: The heat energy was absorbed by the ice and salt mixture, causing the ice to melt. 2. Question 6: Yes, the ice cream would have frozen faster. Sugar lowers the free…
-
8. 0.00500 grams ne convert to mass in grams 9. 10.0 moles na 10. 2.20 …
8. 0.00500 grams 9. 230 g (rounded to 3 sig figs) 10. 261 g (rounded to 3 sig figs) 11. 539 g (rounded to 3 sig figs) 12. $1.08 \times 10^8$ g (rounded to 3 sig figs) 13. 40.1 g (…
-
which of the following compounds would be expected to have the stronges…
the compound that has the smallest ions with the greatest charge
-
solve the following problems according toconvert to moles1. $12.04 \\ti…
1. $2.00\ \text{mol He}$ 2. $0.500\ \text{mol Cu}$ 3. $1.66 \times 10^{-22}\ \text{mol Ar}$ 4. $1.66 \times 10^{-24}\ \text{mol S}$ 5. $2.0\ \text{mol C}$ 6. $0.499\ \text{mol Sn}$
-
which formula represents the compound commonly known as phosphine with …
PH3
-
based on its location in the periodic table, what can most likely be pr…
It has five valence electrons.
-
among the intermolecular forces, which forces are typically the weakest…
London dispersion forces
-
lewis structures cannot ○ show the number of valence electrons. ○ show …
the relative strength of different bonds in a molecule.
-
which statement best describes london dispersion forces? ○ repulsive in…
C. attractive intermolecular forces
-
which statement describes how the binary ionic compound kbr is named? ○…
The metal is named first, and the name is unchanged.
-
how do ionic bonds affect the properties of ionic compounds? ○ the bond…
compounds poor electrical conductors. The other options are incorrect: ionic bonds are strong (so they increase melting/boiling points, not decrease), and they restrict ion (not j…
-
in water, hno3 produces h⁺ ions. which is the name for hno3 in an aqueo…
aqueous solution is nitric acid. Hydrogen nitrate is an alternative but less common name, saltpetre is a common name for the solid potassium nitrate, and nitrous acid corresponds …
-
intermolecular forces quiz complete 1 2 3 4 5 6 7 8 9 10 ici has a high…
addition to London dispersion forces. 3. Stronger intermolecular forces require more energy to overcome, leading to a higher boiling point for ICl. 4. Hydrogen bonding is not poss…
-
intermolecular forces quiz complete 1 2 3 4 5 6 7 8 9 10 van der waals …
Waals component is temporary electron redistribution). - Option C is incorrect as van der Waals forces include attractive forces that draw molecules together, not just when molecu…
-
intermolecular forces quiz complete 1 2 3 4 5 6 7 8 9 10 in the figure …
induced dipole-induced dipole interaction
-
intermolecular forces quiz complete time remaining 57:23 1 2 3 4 5 6 7 …
: polar substances have *higher* boiling points due to stronger forces, nonpolar substances do not form hydrogen bonds, and polar substances have lower volatility.
-
intermolecular forces quiz complete 1 2 3 4 5 6 7 8 9 10 which forces i…
a nonpolar molecule, so they involve nonpolar molecules.
-
intermolecular forces quiz complete 1 2 3 4 5 6 7 8 9 10 time remain 58…
induced dipole-induced dipole
-
intermolecular forces quiz complete 1 2 3 4 5 6 7 8 9 10 are hydrogen b…
No because hydrogen can only form these bonds with highly electronegative atoms.
-
intermolecular forces quiz complete 1 2 3 4 5 6 7 8 9 which forces can …
D. covalent bonds
-
intermolecular forces quiz complete 1 2 3 4 5 6 7 8 9 10 time remaining…
higher.
-
questions: 1. what is a mole? 2. what is avagadros number? 3. name the …
1. A mole is the SI unit for the amount of substance, defined as the amount of a substance that contains the same number of elementary entities (atoms, molecules, ions, etc.) as t…
-
chapter 20: chemical texture services name: _______________ write the l…
1. acid-balanced waves - o 2. alkaline waves - c 3. amino acids - b 4. ammonia-free waves - k 5. ammonium thioglycolate (ATG) - e 6. base control - l 7. base cream - j 8. base dir…
-
nomenclature of covalent compounds quiz complete 1 2 3 4 5 6 7 8 9 10 w…
second element is changed to "-ide", so oxygen becomes oxide. This matches the formula $P_2O_5$.
-
nomenclature of covalent compounds quiz complete 1 2 3 4 5 6 7 8 9 10 w…
nitrogen monoxide
-
nomenclature of covalent compounds quiz complete 1 2 3 4 5 6 7 8 9 10 w…
P, "chloride" = Cl. ## Step2: Match name to formula Phosphorus pentachloride means 1 P atom and 5 Cl atoms, so formula is $\text{PCl}_5$. ## Step3: Evaluate options Only the secon…
-
nomenclature of covalent compounds quiz complete 1 2 3 4 5 6 7 8 9 10 w…
The chemical name ends with "hydroxide."
-
nomenclature of covalent compounds quiz complete 1 2 3 4 5 6 7 8 9 10 w…
sulfuric acid
-
nomenclature of ionic compounds quiz complete 1 2 3 4 5 6 7 8 9 10 what…
ions in ionic compounds, so the correct name is cesium sulfide.
-
heating a sample will cause the density to: a. remain the same b. incre…
C. Decrease
-
the change in the physical form or chemical composition of rock materia…
D. weathering
-
nomenclature of ionic compounds quiz complete 1 2 3 4 5 6 7 8 9 10 what…
+2 charge. 3. For transition metals like copper, the charge is indicated with a Roman numeral in parentheses, so it is copper(II) nitrate.
-
nomenclature of ionic compounds quiz complete 1 2 3 4 5 6 7 8 9 10 what…
odine becomes iodide, and prefixes are not used for this type of ionic compound.
-
limiting reactants lab- review for understanding $ce{2 al_{(s)} +3 (cuc…
(Part a): The limiting reactant is $\text{CuCl}_2\cdot2\text{H}_2\text{O}$ (copper(II) chloride dihydrate).
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which element has t…
(group 15) has 5 valence electrons. Aluminum has the lowest number of valence electrons among the options.
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 10 time remai 57:15 wh…
Covalent substances have weaker intermolecular attractions.
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which compound cont…
polar covalent molecule. HCl and H₂O have polar covalent bonds due to electronegativity differences between their atoms, and NO₃⁻ (nitrate ion) is a polyatomic ion with polar bond…
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 10 what is the best re…
bonds to properties Ionic/covalent bonding differences cause distinct physical/chemical properties (e.g., solubility, melting point) between the two compounds. ## Step3: Eliminate…
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 10 how many valence el…
four
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 10 time 5 which type o…
a polar covalent bond
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 which compound is an e…
rule, which is a related exception for small atoms). In ClF₃, the central chlorine atom has 10 valence electrons (3 bonds to fluorine plus 2 lone pairs), making it an exception to…
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 which pair of elements…
hydrogen and chlorine
-
covalent bonding quiz complete 1 2 3 4 5 6 7 8 9 10 time 5 a solid comp…
a covalent compound because it has a low melting point
-
7. a student examined the chemical formula for a compound, $ce{h_{2}c_{…
## Classification: It should be classified as an ionic compound (specifically, the formula represents the hydrogen citrate species, which is part of ionic salts like sodium hydrog…
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which statement descri…
. Oppositely charged ions then attract to form the bond. The other options are incorrect: same-charge ions repel, electrons transfer to more electronegative atoms, and ionic bonds…
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which statement is tru…
They are made up of particles that are arranged in a repeating pattern.
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which property is best…
lattice structure, and solubility depends on solvent-solute interactions, none of which directly measure ionic bond strength as precisely as lattice energy.
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which statement is tru…
It is made of atoms that are covalently bonded together.
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which statement indica…
of molecules, and are brittle (cannot be flattened by force without breaking).
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which of these best de…
a force that holds two oppositely charged ions together
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 9 10 time remaining 59:10 w…
It is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a -3 charge distributed over the entire ion.
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 9 10 which pair of ions can…
Evaluate each option - Cu⁺ and Ag⁺: Both positive, repel, no bond. - S²⁻ and O²⁻: Both negative, repel, no bond. - Br⁻ and At⁻: Both negative, repel, no bond. - Li⁺ and Br⁻: Posit…
-
ionic bonding quiz complete 1 2 3 4 5 6 7 8 which pair of elements will…
B. K and Br
-
6. make a rule: if you knew the number of valence electrons in a nonmet…
6. For nonmetals (excluding H), valence = $8 - \text{number of valence electrons}$ (the number of electrons needed to fill the 8-electron valence shell). 7. Hydrogen has 1 valence…
-
activity b (continued from previous page)5. count: review the lewis dia…
| Element | Symbol | # of valence electrons | Valence | Sum | |---------|--------|------------------------|---------|-----| | Hydrogen | H | 1 | 1 | 2 | | Fluorine | F | 7 | 1 | 8…
-
what kind of inhibitor is hydroxylamine? click on the view theory butto…
c) Competitive
-
balance each of the following chemical equations using the smallest pos…
1. 2, 1, 2 2. 1, 2, 1, 1 3. 4, 3, 2, 3 4. 2, 1, 2 5. 1, 2, 1, 2
-
the y-axis of the progress curve shows the absorbance value. how can we…
a) $A = e \cdot c \cdot l$
-
__cas + __alcl₃ → __cacl₂ + __al₂s₃ calc + periodic table allowed 1. gi…
a. Limiting reactant: $\text{AlCl}_3$ (Aluminum chloride) b. Mass of calcium chloride: $\approx1022\text{ g}$ --- ### Problem 2
-
1pt what subatomic particles combine to form atoms? a. elements, electr…
D. electrons, protons, and neutrons
-
1pt if you move diagonally across the periodic table from the top right…
C. protons
-
section iii: names, classification, and formulas for compounds in the t…
| Chemical formula | classification | name | |------------------|----------------|------| | $\ce{H2ClO2}$ | acid | chlorous acid | | $\ce{K2C2O4}$ | ionic compound | potassium oxa…
-
what volume of co₂ produced from the combustion of 22.4 l of methane at…
# Explicación: ## Paso 1: Relacionar moles en la reacción De la reacción balanceada $\text{CH}_4(g) + 2\text{O}_2(g) ightarrow \text{CO}_2(g) + 2\text{H}_2\text{O}(g)$, se observa…
-
which elements will bond ionically with barium such that the formula wo…
B. Chlorine, Iodine, and Fluorine
-
19. the ______ end of a surfactant molecule is water attracting. 20. th…
19. hydrophilic (polar head) 20. lipophilic (non-polar tail) 21. Client consultation and hair/skin analysis 22. more the hair cuticle swells 23. 1. Hair texture 2. Hair density 3.…
-
why do we need to add buffer into the master mix? a) to stabilize react…
a) To stabilize reaction pH
-
case study: lake nyosgeographylake nyos is a crater lake about 1.5 squa…
$\boldsymbol{\text{CO}_2 + \text{H}_2\text{O} ightleftharpoons \text{H}_2\text{CO}_3}$ ---
-
geographylake nyos is a crater lake about 1.5 square kilometers and fou…
1. $\text{CO}_2 + \text{H}_2\text{O} ightleftharpoons \text{H}_2\text{CO}_3$ 2. Both rely on pressure to trap dissolved CO₂: Lake Nyos uses high water pressure at depth to hold CO…
-
section b: word problems(40 points)stoichiometry1. mole-to-mole (synthe…
9.00 mol --- #### 2. Mole-to-Mass (Combustion of Methane)
-
balancing & types of reactions practice name: indira date: 2 / 11 pd: 1…
1) $2\text{NaBr} + \text{Ca(OH)}_2 ightarrow \text{CaBr}_2 + 2\text{NaOH}$; Reaction Type: Double Displacement 2) $\text{H}_2 + \text{Cl}_2 ightarrow 2\text{HCl}$; Reaction Type: …
-
Question was provided via image upload.
5. $2\text{K} + \text{MgBr}_2 ightarrow 2\text{KBr} + \text{Mg}$ 6. $2\text{Ag}_2\text{O} ightarrow 4\text{Ag} + \text{O}_2$ 7. $\text{Pb(OH)}_2 + 2\text{HF} ightarrow 2\text{H}_2…
-
what determines the theoretical yield in a chemical reaction? actual yi…
Limiting reactant
-
instructions - balance the chemical equations by changing the coefficie…
1. $\boldsymbol{\underline{1}\text{F}_2 + \underline{2}\text{NaCl} ightarrow \underline{2}\text{NaF} + \underline{1}\text{Cl}_2}$ (already balanced) 2. $\boldsymbol{\underline{1}\…
-
5. nonpolar- atoms have ______ attraction for electrons. 6. polar atoms…
5. equal 6. unequal 7. attract
-
3. the formula for converting from degrees celsius to degrees fahrenhei…
a. $50.00^\circ\text{F}$ b. $-7.60^\circ\text{F}$
-
2. determine if the following compounds are ionic (i) or covalent (c). …
2. a) $\text{CaCl}_2$: I (Ionic) b) $\text{NaI}$: I (Ionic) c) $\text{CO}_2$: C (Covalent) d) $\text{NH}_3$: C (Covalent) 3. 1) Na and O: I (Ionic) 2) K and F: I (Ionic) 3) CO: C …
-
2. determine if the following compounds are ionic (i) or covalent (c). …
a) CaCl₂: I (Ionic) b) NaI: I (Ionic) c) CO₂: C (Covalent) d) NH₃: C (Covalent)
-
explain how ozone in the stratosphere is formed.
Ozone in the stratosphere forms via a two-stage photochemical reaction: 1. High-energy ultraviolet (UV-C) radiation from the Sun splits diatomic oxygen molecules ($O_2$) into two …
-
color any squares with these answers pink:5.430 g = _______ mg4.38 l = …
### PINK: $5.426$ g = $\boldsymbol{5426}$ mg $4.38$ L = $\boldsymbol{4380}$ mL $85.700$ cm = $\boldsymbol{0.000857}$ km ### WHITE: $9.65$ m = $\boldsymbol{965}$ cm $85.300$ mL = $…
-
color any squares with these answers light green: 61,000 ml = ____ l 0.…
$61,000\ \text{mL} = 61\ \text{L}$ $0.853\ \text{kg} = 853\ \text{g}$ $0.025\ \text{km} = 25\ \text{m}$
-
color any squares with these answers dark green: 1.23 m = ______ mm 2.5…
1230 mm 2500 mL 968000 mg
-
covalent bonding is typically explained as a bond that forms when atoms…
Atoms are both trying to attract the same electrons, causing a situation where both atoms are pulled together.
-
question 2 why do ionic bonds form between metals and nonmetals? ○ ioni…
Ionic bonds form between metals and nonmetals because metals form positive ions and non-metals form negative ions.
-
in order to build an ionic compound that sticks together you need atoms…
opposite charges
-
use the graph below to answer summary questions 1-5:weathering determin…
1. Average yearly temperature at or below 0°C (freezing conditions for water to freeze and thaw repeatedly). 2. Strong chemical weathering 3. Dry climates have very little precipi…
-
fill in the missing information in the data table below. round all answ…
| | Aluminum Bar | Aluminum Cube | |--|--|--| | Length (cm) | 6.0 | 1.5 | | Width (cm) | 2.6 | 1.5 | | Height (cm) | 0.8 | 1.5 | | Volume (cm³) | 12.48 | 3.38 | | Mass (g) | 33.70…
-
25. syrup is very _______________.homogeneous (homo) or heterogeneous (…
### Mixture Classification: 25. homogeneous (HOMO) 26. homogeneous (HOMO) 27. heterogeneous (HETERO.) 28. heterogeneous (HETERO.) 29. homogeneous (HOMO) 30. homogeneous (HOMO) 31.…
-
label the state of matter changes42. two places you may find plasma are…
- A: Sublimation (Solid to Gas) - B: Deposition (Gas to Solid) - C: Condensation (Gas to Liquid) - D: Vaporization (Liquid to Gas) - E: Melting (Solid to Liquid) - F: Freezing (Li…
-
6. ______a student heats a saturated solution, more solute dissolves wh…
6. B. The student created a supersaturated solution because it contains more dissolved solute than the equilibrium amount at the cooler temperature 7. B. The curve slopes steeply …
-
unit 6 concept 4: solubility quiz 1. ______which description best match…
1. B. A solution that contains the maximum amount of dissolved solute for a given temperature and pressure; additional solute will not dissolve 2. C. Supersaturated 3. B. Water mo…
-
7. mole-to-mole (reaction of iron and sulfur)iron metal (fe) reacts wit…
1. Problem 7: - Balanced Equation: $16\text{Fe} + 3\text{S}_8 ightarrow 8\text{Fe}_2\text{S}_3$ - Moles of Fe: $1.33$ mol 2. Problem 8: - Balanced Equation: $2\text{SO}_2 + \text{…
-
4. mass-to-mass (single replacement reaction) solid zinc (zn) reacts wi…
Balanced Equation: $\boldsymbol{\text{Zn}(s) + \text{Cu(NO}_3\text{)}_2(aq) ightarrow \text{Zn(NO}_3\text{)}_2(aq) + \text{Cu}(s)}$ Mass of Cu: $\boldsymbol{24.3}$ g
-
given what you know about the stability of filled and half-filled subsh…
N+e⁻→N⁻
-
how does the electronegativity (en) of nonmetals generally compare to m…
The EN is generally higher for non-metals than metals.
-
which of the following is false for an atom with a high electron affini…
The atom is likely to have a low effective nuclear charge.
-
why is fluorine more electronegative than oxygen? the valence shell is …
The increased protons and electrons in the same energy level increase the effective nuclear charge.
-
ionization energy 2nd group elements the data table represents the ioni…
element 1
-
size trends ionic radius consider your knowledge about the behavior of …
Statement II
-
size trends atomic radius consider your knowledge about the behavior of…
Statement III