Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
-
topic: experimental chemistry (experimental design, methods of purifica…
B. Burette ### Question 2
-
the following diagram shows molecular models of glucose (a simple sugar…
C. Some of the carbon atoms in alanine are the same atoms that were once in glucose.
-
the carboxyl functional group is alkaline/basic. true false question 3 …
False ### Question 3
-
introduction next week, well start learning about atoms. to whet your i…
### Application 1: Carbon in Batteries (Graphite) - **Description**: Graphite (a carbon allotrope) is a key component in lithium - ion batteries, which are widely used in smartpho…
-
what volume of 0.311 m sulfurous acid solution could be neutralized by …
124 mL (rounded to 3 significant figures)
-
29.91 ml of an acid solution (identity unknown) is neutralized by 17.29…
$0.2311\ \text{N}$
-
25.14 ml of 0.2220 m phosphoric acid is neutralized by 38.77 ml of bari…
$0.2159\ \text{M}$
-
what volume of 0.100 m sulfuric acid could be neutralized by 40.00 ml o…
20.00 mL
-
7) ___ fe + ___ cuno₃ → ___ fe(no₃)₂ + ___ cu = fe = = cu = = no = 8) _…
1, 2, 1, 2 (coefficients for Fe, \( \text{CuNO}_3 \), \( \text{Fe(NO}_3\text{)}_2 \), Cu) ### Problem 8: Balancing \( \boldsymbol{\text{NaCl} + \text{F}_2 ightarrow \text{NaF} + \…
-
what is the mass % of ethylene glycol in a 2.33 m solution of ethylene …
13.5% (rounded to three significant figures)
-
what is the concentration in molarity of an aqueous solution that conta…
$0.605\ \text{mol/L}$
-
an aqueous solution of glucose (molar mass = 180.2 g/mol) has a molalit…
$3.57\ \text{M}$ (rounded to three significant figures)
-
what is the molarity of potassium ions in a 0.122 m k₂cro₄ solution? 0.…
0.244 M $K^+$
-
question 7 (1 point) molecular elements contain two or more identical a…
False
-
select all that apply: atoms with an unequal number of protons and elec…
A. anions, D. cations ### Question 6
-
a solution with a ph of 4 has how many times hydronium (h+) ions as a s…
10 (corresponding to the option "10")
-
determine the amount in grams of kcl that exists in 20.3 g of a solutio…
0.231 g KCl For the empty box in the red-framed ratio, the correct label is **g KCl** (to match the unit cancellation logic: $\frac{\text{g KCl}}{\text{g solution}} \times \frac{\…
-
describe the location of each of the following groups on the periodic t…
1. **Alkali metals**: Location: Group 1 (excluding H) Elements: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), Francium (Fr) 2. **Alkaline Earth Metals**: L…
-
describe the location of each of the following groups on the periodic t…
1. **Alkali metals** - Location: Group 1 (far left, excluding hydrogen) - Elements: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), Francium (Fr) 2. **Alkali…
-
how many moles are present in 45.7 cm³ of chromium (cr), given that the…
$\approx 6.32$ moles --- ### Second Calculation Problem: Moles of Mercury
-
6. what sample contains more atoms: 1 mole of nacl or 1 mole of cacl₂? …
6. 1 mole of $\text{CaCl}_2$ 7. 1 mole of silicon atoms 8. $17.03\ \text{g/mol}$ (rounded to two decimal places) 9. $34.02\ \text{g/mol}$ (rounded to two decimal places) 10. 1 mol…
-
activity 1 – atoms, molecules, moles, and mass – 10 points purpose to e…
1. 2244 copper atoms 2. $1.13 \times 10^{26}$ copper atoms (rounded to 3 significant figures) 3. $1.54 \times 10^{26}$ water molecules (rounded to 3 significant figures) 4. $3.07 …
-
what volume, in l, of a 0.575 m cu₂so₄ solution contains 0.127 lb of cu…
0.449 L
-
how many moles of nickel (ni) atoms are in 48.5 g of ni? how many moles…
1. $0.826\ \text{mol}$ 2. $8.21\ \text{mol}$ 3. $1.263\ \text{mol}$ 4. $3.93 \times 10^{23}\ \text{atoms}$ 5. $1.62 \times 10^{21}\ \text{atoms}$ 6. $1.22\ \text{mol}$ 7. $3.15 \t…
-
how many equivalents of hydrochloric acid would react with 0.248 eq cal…
0.248 equivalents
-
conversions with avogadros number($n_a$) and molar mass how many atoms …
1. Atoms in 2.50 mol Si: $1.51 \times 10^{24}$ atoms 2. Atoms in 2.50 mol Fe: $1.51 \times 10^{24}$ atoms 3. Atoms in 14.8 mol Cu: $8.91 \times 10^{24}$ atoms 4. Moles of Ag: $1.6…
-
the atomic masses of $^{35}\text{cl}$ and $^{37}\text{cl}$ are 34.9689 …
Natural abundance of \(^{35}\text{Cl}\) is 75.81%, natural abundance of \(^{37}\text{Cl}\) is 24.19% --- ### Second Problem: Mass of \(^{26}\text{Mg}\)
-
identify the reaction that occurs when the base koh is added to the buf…
First box (reactant): \( \text{KOH}(aq) + \text{HF}(aq) \) Second box (product): \( \text{H}_2\text{O}(l) + \text{KF}(aq) \)
-
buffer solutions complete the following chemical equations to show what…
First box: \( \text{HBr}(aq) + \text{KF}(aq) \) Second box: \( \text{HF}(aq) + \text{KBr}(aq) \)
-
argon (ar) has three naturally occurring isotopes. $^{36}$ar has an ato…
The average atomic mass of argon is 39.948 amu. This matches the periodic table value of ~39.95 amu (the slight difference is due to rounding during calculations). --- ### Second …
-
isotopic symbolism \\(\\ce{^{a}_{z}x^{n}}\\) a – mass number z – atomic…
1. **Definition of Isotope**: Atoms of the same element (same atomic number) with different mass numbers due to different neutron counts. 2. **Calcium Isotopes**: - Same: All are …
-
unit 2 – atoms and the periodic table – guided notes 2.1 atomic theory …
### Dalton's Atomic Theory 1. Matter is made of indivisible atoms. 2. Same-element atoms are identical. 3. Different elements have unique atoms. 4. Atoms combine in fixed whole-nu…
-
unit 2 – atoms and the periodic table – guided notes 2.1 atomic theory …
### Dalton's Atomic Theory 1. All matter consists of indivisible atoms. 2. Same-element atoms are identical. 3. Different elements have unique atoms. 4. Atoms combine in fixed who…
-
read the excerpt from \sonnet 29.\ when, in disgrace with fortune and m…
A. abab
-
markus is reading a sonnet by william shakespeare. which will best help…
finding a single concept that links the lines together
-
solid silver forming on a piece of copper wire the chemical equation fo…
copper (Cu): Reactant copper nitrate ($\text{Cu(NO}_3\text{)}_2$): Product silver (Ag): Product silver nitrate ($\text{AgNO}_3$): Reactant
-
antacid tablets for heartburn and indigestion the chemical equation for…
magnesium hydroxide ($\text{Mg(OH)}_2$): solid ($s$) hydrochloric acid ($\text{HCl}$): aqueous ($aq$) water ($\text{H}_2\text{O}$): liquid ($l$) magnesium chloride ($\text{MgCl}_2…
-
you might need: periodic table select the correct values in the table. …
single bond: 1 shared electron pair, 2 electrons double bond: 2 shared electron pairs, 4 electrons triple bond: 3 shared electron pairs, 6 electrons
-
move the cards to match the name with the correct chemical formula. che…
$\text{CaCO}_3$ - calcium carbonate $\text{K}_2\text{CrO}_4$ - potassium chromate $\text{CaCl}_2$ - calcium chloride $\text{K}_2\text{CO}_3$ - potassium carbonate $\text{KCl}$ - p…
-
orange crystals of grossular garnet grossular is composed of calcium io…
$\text{Ca}^{2+}$ and $\text{SiO}_4^{4-}$: Ionic bond $\text{Al}^{3+}$ and $\text{SiO}_4^{4-}$: Ionic bond $\text{Si}$ and $\text{O}$: Covalent bond
-
which of the following best describes the term \sciatica\? neurological…
B. Burning or aching posterior thigh pain caused by ischemic changes of and/or neuroinflammation of the Sciatic nerve.
-
question 5 (1 point) listen how many atoms are in 7.12 mol of gold, au?…
b) $4.29 \times 10^{24}$ atoms
-
question 4 (1 point) listen how many atoms are in 0.534 mol of nickel, …
c) $3.22 \times 10^{23}$ atoms
-
question 6 (1 point) listen how many moles are in $8.73 \\times 10^{25}…
d) 145 moles
-
question 7 (1 point) listen how many moles are present in 17.4 g of lea…
b) 0.0840 moles
-
question 8 (1 point) listen how many moles are present in 50.2 g of mer…
b) $2.50 \times 10^{-1}$ moles
-
question 11 (1 point) listen which of the following is an alkali metal?…
a) rubidium (Rb) b) sodium (Na)
-
question 3 (1 point) listen three atoms have the following subatomic pa…
- They all have the same atomic number but different atomic masses. - They are all the same element; they are isotopes of each other.
-
question 2 (1 point) listen given the following numbers of protons (p),…
b) 14 p, 14 e, 14 n e) 14 p, 14 e, 15 n
-
question 1 (1 point) listen which is true of an atom of \\(_{27}^{67}\\…
b) It has the same mass as $_{24}^{67}\text{Cr}$. d) It has 27 protons. e) It has more mass than $_{29}^{65}\text{Cu}$.
-
apply: conservation and sustainability google classroom microsoft teams…
A. implementing comprehensive recycling systems B. expanding composting programs for organic waste
-
which of the following best describes an example of a provisioning serv…
B. Indigenous communities harvest and eat the bulbs of common camas plants.
-
which of the following best describes an example of a supporting servic…
D. Decomposers recycle nutrients through the fundamental process of biogeochemical cycling.
-
which of the following best describes an example of a regulating servic…
A. Dense plant growth helps to maintain water quality by removing pollutants.
-
this painting is by pablo picasso, entitled the blind man’s meal. what …
b. He used a monochromatic color scheme, which occurs when one color predominates,shades of black, tints of white, values of a hue.
-
intensity is a. the lightness or darkness of a color. b. the illuminati…
c. the brightness or dullness of a color.
-
describe some the similarities and differences between metals, nonmetal…
### Metal (only left circle): - Good conductors of heat/electricity - Lustrous, malleable, ductile - Most are solid at room temp (Hg exception) ### Nonmetals (only right circle): …
-
required information a crate has a mass of $10.1 \\times 10^6$ mg (mill…
\(10.1\)
-
consider the following electronegativity values: boron (b) = 1.8 carbon…
B-Cl
-
sanai was monitoring the oil spill in the gulf of mexico from an oil ta…
Hydrophobic interactions
-
a chemist adds a chemical to pure water and there is a 100 - fold incre…
C. 5
-
complete the sentences about acids, bases, and ph using the words provi…
1. A(n) **acid** acts to increase the hydrogen ion concentration of a solution. 2. A(n) **base** acts to decrease the hydrogen ion concentration of a solution. 3. A(n) **buffer** …
-
label the parts on the diagram. labels hydrogen bond hydrogen atom an o…
- Left top box (linked to the full large molecule): An organic molecule - Right top box (linked to the $\delta^+$ white atom): Hydrogen atom - Right bottom box (linked to the dash…
-
for each statement below, indicate whether it is true or false. 1. brea…
1. False 2. True 3. True 4. True 5. True 6. False 7. False 8. True 9. True 10. True
-
given the electronegativity of each of the following atoms, rank the bo…
1. O-H 2. C-O 3. C-N 4. C-H 5. C-C
-
multiple choice question a base is a substance that ______. lowers h⁺ a…
A. lowers $\text{[H}^+]$ and increases the pH when it dissociates in water
-
fill in the blank question a substance that increases h⁺ and decreases …
Acid
-
how many hydrogen atoms are there in baking a. 1 b. 2 c. 3 d. 4
c. 3
-
multiple choice question a single water molecule can spontaneously brea…
One positive hydrogen ion and one negative hydroxide ion
-
in the equation given below, identify (equation: 2h₂ + o₂ — 2h₂o) mark …
a. 2H2O, b. 2H2, c. O2
-
in the equation given below, identify the... $2h_2 + o_2 \ ightarrow 2h…
b. H
-
fill in the blank question when 1 g of sugar is dissolved in 500 ml of …
solute; solvent
-
multiple choice question if two atoms are joined by a polar covalent bo…
higher electronegativity
-
select all that apply molecules that are more polar tend to have which …
A. A higher specific heat D. A higher heat of vaporization
-
what is the rhyme scheme in the first stanza of holman’s poem \we pulle…
A. ABBA
-
what is the rhyme scheme in the first stanza of cullen’s poem \if you s…
B. ABAB
-
which of the following describes hydrogen bonds? they are stronger than…
They are about 5 - 10% as strong as covalent bonds.
-
select the reasons why the molecule formed by two hydrogen atoms (h₂) i…
It has no net charge. It is held together by a covalent bond. It has no unpaired electrons.
-
1. the oligarchs were in control, although they comprised only 0.0032 o…
1. 400000 2. 4000 3. 184 grams 4. 2310 grams 5. 40 miles
-
multiple choice question when nacl is formed, ______. ○ a chlorine atom…
a sodium atom loses an electron, while a chlorine atom gains an electron
-
fill in the blank question unlike bonds, which produce a crystal lattic…
Unlike **ionic** bonds, which produce a crystal lattice, **covalent** bonds are formed between 2 individual atoms, giving rise to true, discrete molecules.
-
what is true of a molecule of gaseous hydrogen (h₂)? it has no net char…
It has no net charge.
-
covalent bond ionic bond hydrogen bond hydrophobic interaction van der …
- Covalent bond → Sharing of electrons - Ionic bond → Attraction between oppositely charged atoms - Hydrogen bond → Attraction between a covalently bound H atom with a slight posi…
-
quiz question 2 of 10 the two types of weathering are choose one option…
C. mechanical and chemical.
-
multiple choice question atoms of different chemical elements can be di…
C. protons in the nucleus
-
which characteristic is not true about solutions? they can be filtered …
They can be filtered
-
two liquids that do not dissolve in each other are called solution inso…
The correct option (assuming the yellow box is labeled as B. immiscible) is B. immiscible
-
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 group ($…
-
give the iupac name for each compound. part 1 of 3
# Explanation: ## Step1: Identify the longest carbon chain The longest carbon chain here has 5 carbons (pentane backbone). Let's analyze the structure: the central carbon is conne…
-
6. acamp fe 0007 10 pts possible the mole concept is important in chemi…
1. atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material
-
if 5.1 g of h₂ were to be mixed with 20.52 g of o₂, 2 h₂ + o₂ → 2 h₂o, …
1. \( \text{O}_2 \)
-
4. brodbelt 3200428 10 pts possible consider the following reaction: \\…
6. \( \text{H}_2\text{O} \); 7.20 g left over
-
3. brodbelt 3200428 1 10 pts possible consider the following reaction: …
1. \( \text{H}_2\text{O} \); 7.20 g left over
-
2. brodbelt 3200428 warm 10 pts possible consider the following reactio…
1. \( \text{H}_2\text{O} \); 7.20 g left over
-
1. stoich 1a 10 pts possible how many grams of no can be produced from …
3. 16.7 g
-
practice: ionic naming race complete one box at a time. you must come u…
1. Sodium fluoride 2. Strontium sulfide 3. Copper (I) sulfide 4. Potassium carbonate 5. Calcium chloride 6. Beryllium hydroxide 7. Zinc iodide 8. Magnesium phosphate 9. Ammonium i…
-
practice: ionic compounds nomenclature name the following ionic compoun…
### Naming Ionic Compounds: 1. Magnesium nitrate 2. Manganese(II) sulfide 3. Potassium oxide 4. Lithium carbonate 5. Calcium hydroxide 6. Nickel(II) phosphide 7. Potassium phospha…
-
balancing chemical equations andres hooper multiple-choice question whi…
$\text{N}_2 + 3\text{H}_2 ightarrow 2\text{NH}_3$ (the first multiple-choice option)
-
practice: properties of matter part 1 classify the following properties…
## Part 1 1. E (Mass) 2. I (Boiling point) 3. I (Combustibility) 4. I (Volatility) 5. I (Density) 6. I (Viscosity) ## Part 2 7. P (Density) 8. P (Odor) 9. C (Ability to react with…
-
multiple-choice question how many nitrogen atoms are there on the react…
B. 2