化學
化學反應、化學計量、分子結構與元素性質。
-
quiz #2 begin date: 10/20/2025 12:01:00 am due date: 10/26/2025 11:59:0…
isotopes.
-
details listen complete the sentence move the correct answer to the box…
absorbed
-
select the correct answer. what are the types of energies released when…
A. thermal and radiant
-
emission spectroscopy in action as youve seen, emission spectroscopy is…
The color in fireworks is from metal salts. Use emission spectroscopy to analyze the light (split into wavelengths) as each metal has a unique spectral pattern.
-
utility operation and distribution use the information below to answer …
to ensure the purity and safety of drinking water
-
she walks in beauty george gordon byron she walks in beauty, like the n…
B. The rhyme scheme is ABABAB.
-
she walks in beauty george gordon byron she walks in beauty, like the n…
B. 6 line stanzas in an ababab rhyme scheme
-
she walks in beauty george gordon byron she walks in beauty, like the n…
B. 6 line stanzas in an ababab rhyme scheme
-
esters have the general formula rcoor, where r may be a hydrogen atom, …
False
-
esters and amides are considered to be derivatives of carboxylic acids …
True
-
activity: punny configurations part 1: go through the following electro…
1. \(N\) 2. \(He\) 3. \(I\) 4. \(O\) 5. \(K\) 6. \(invalid\) 7. \(Ba\) 8. \(Ar\) 9. \(invalid\) 10. \(Cm\) 11. \(Fm\) 12. \(Ti\) 13. \(Ac\) 14. \(As\) 15. \(Tb\)
-
the ______ of aldehydes or primary alcohols forms carboxylic acids. red…
oxidation
-
part 1: go through the following electron configurations and determine …
\(N\)
-
how are the carboxyl and amide functional groups alike and different? t…
The carboxyl and amide both have carbonyl groups. The amide has a nitrogen atom attached to the carbonyl carbon atom; the carboxyl group has a hydroxyl group attached to the carbo…
-
question 4 (1 point) isopropyl amine is a secondary amine. true false
False
-
question 3 (1 point) which of the following alcohols is classified as a…
Isopropyl alcohol
-
question 2 (1 point) which of the following alcohols is the active ingr…
Ethyl alcohol
-
which of the following is the general formula of alcohols? (r represent…
ROH
-
question 4 the limiting reactant can be identified in a chemical reacti…
A. limits the amount of product formed
-
read the sentence. 1 alejandros guidance counselor is helping him plan …
Sentence 3
-
a tuning fork is vibrating the air around it. what best describes the w…
B. mechanical, because the vibrating tuning fork makes air molecules around it vibrate
-
5 select the correct answer. what is the oxidation number of s in li₂so…
D. +6
-
select the correct answer. what is the oxidation number of b in ( h_3bo…
C. +3
-
select the correct answer. what happens to a reducing agent during a re…
B. The reducing agent is oxidized.
-
select the correct answer. which of these particles are lost in the oxi…
C. electrons
-
select the correct answer. in an oxidation - reduction reaction, what h…
B. Electrons are gained.
-
an atomic cation with a charge of +1 has the following electron configu…
- Chemical symbol for the ion: \(\text{F}^+\) (but this is a very unstable ion. Usually, we consider the problem may have an error. If we assume it's a \(+1\) cation formed by los…
-
a student reported the percentage of water in a hydrate as 42%. the cor…
A. The dehydrated sample absorbed moisture after heating.
-
imf properties 1 10 pts possible two liquid substances are spilled onto…
3. B must have a higher boiling point than A.
-
how does the strength of intermolecular bonds within a water molecule c…
The intramolecular bonds within a water molecule are stronger than the intermolecular bonds between water molecules (Option b).
-
state if matter is created or destroyed during this chemical reaction. …
Matter is **not created or destroyed** during this chemical reaction because **the law of conservation of mass holds, atoms are just rearranged and the total mass of reactants equ…
-
state if energy is created or destroyed during this chemical reaction. …
Energy is not created or destroyed during this chemical reaction because of the law of conservation of energy.
-
read the narrative prompt: write an essay about one thing you do each d…
Driving less frequently is a good way to help the environment.
-
1. the image shows a speaker plugged into a socket. what type of energy…
1. electrical to sound 2. kinetic to thermal 3. B. The kinetic energy is the least at Point C.
-
6. the solution in the beaker below has a ph of 7. which of the followi…
B.
-
draw: draw the orbital diagram for the following elements. be sure to l…
The orbital diagram for lithium has a \(1s\) orbital (labeled \(1s\) below its box) with two electrons (\(\uparrow\downarrow\)) and a \(2s\) orbital (labeled \(2s\) below its box)…
-
the drawing shows a sulfur dioxide molecule. it consists of two oxygen …
(a) The \(x\) coordinate of the center of mass is \(0\text{ nm}\) (b) The \(y\) coordinate of the center of mass is \(0.062\text{ nm}\)
-
current attempt in progress the drawing shows a sulfur dioxide molecule…
(a) \(x_{cm}=0\text{ nm}\) (b) \(y_{cm}=0.062\text{ nm}\)
-
physical vs. chemical changes in a physical change, the original substa…
1. Physical change 2. Chemical change 3. Physical change 4. Physical change 5. Chemical change 6. Chemical change 7. Chemical change 8. Physical change 9. Physical change 10. Chem…
-
match the chemical agent with its common application. 1 chlorine gas 2 …
1. Chlorine gas - Large scale disinfection of drinking water 2. Hypochlorites - Disinfection in restaurants, hospitals, homes, and pools/spas 3. Iodophors - Skin and tissue antise…
-
part d balance the following equations 1. __ca + __o₂ → __cao 2. __n₂ +…
1. \(2Ca+O_2 ightarrow 2CaO\) 2. \(N_2 + 3H_2 ightarrow 2NH_3\) 3. \(2Cu_2O + C ightarrow 4Cu+CO_2\) 4. \(2H_2O_2 ightarrow 2H_2O + O_2\) 5. \(2Na+MgF_2 ightarrow 2NaF+Mg\) 6. \(M…
-
cycle 6 ch 5 homework name: anvine corins integrity statement: i affirm…
1. Electrons fill orbitals starting from the lowest energy level. 2. Electrons occupy degenerate orbitals singly before pairing. 3. No two electrons in an atom can have the same s…
-
select the correct answer. what is the name of h₂s? a. sulfuric acid b.…
D. hydrosulfuric acid
-
select the correct answer. which gas is produced when mg(s) is added to…
B. \(H_2\)
-
select the correct answer. which of the following tests could be safely…
D. electrical conductivity
-
select the correct answer. what is the anion found in phosphoric acid? …
D. \( \text{PO}_4^{3 - } \)
-
student handout 5. which of the following choices describes an investig…
B. A student drops a sugar cube in water and mixes a tablespoon of loose sugar in a second container of water to see which one dissolves more quickly.
-
select the correct answer. two beakers are on a laboratory bench. one b…
A. Drop a piece of magnesium in each solution.
-
fill in the table below with the elements involved in bond, lewis dot s…
\(CaF_{2}\)
-
fill in the table below with the elements involved in bond, lewis dot s…
\(Cs_2O\) (the fourth option)
-
fill in the table below with the elements involved in bond, lewis dot s…
\(Ba_3P_2\) (corresponding to the option \(Ba_3P_2\))
-
1. no₂ o₂ zn srcl₂ k₂o c₆h₁₂o₆ cao * required ionic answer by dragging …
| Compound | Type | |--|--| | \(NO_{2}\) | Covalent | | \(O_{2}\) | Covalent | | \(Zn\) | Metallic | | \(SrCl_{2}\) | Ionic | | \(K_{2}O\) | Ionic | | \(C_{6}H_{12}O_{6}\) | Coval…
-
summarize it 1. if a student wants to decrease the concentration of an …
1. A. The student should add more solvent to the solution. 2. D. Stirring the solution helps increase the rate of dissolution. 3. C. Heat the solution, causing some of the solvent…
-
vocabulary saturated solution: containing the maximum amount of solute …
When you add more solute to an aqueous solution and it no longer dissolves (the solute remains undissolved at the bottom of the container), the solution is saturated.
-
my cousins attention to the environment has always been strong, but lat…
B. James spends almost every minute of his day telling people to recycle.
-
10 the graph below illustrates the solubility of potassium chloride (kc…
\(20^{\circ}C\)
-
aqueous solutions - 7.6d, 7.6e 9 part b which statement best explains t…
A. The increase in temperature means an increase in kinetic energy within the solvent. This increase in kinetic energy allows more solute particles to be broken apart and dissolved
-
the images provided show different solutes. which solutes would dissolv…
Ground sugar, Ground salt, Potassium chloride powder.
-
6 which of the following factors affects the rate of dissolution of sol…
Surface area, Agitation, Temperature
-
aqueous solutions - 7.6d, 7.6e which factor affecting the rate of disso…
B. Agitation
-
water the solute remaining after 2 minutes of agitation is removed from…
D. Substance D
-
3 12 g of nacl (salt) are dissolved into a beaker containing 50 ml of w…
D. To dilute the solution, add more water
-
which of the following illustrations would not increase the rate of dis…
A. 4 only
-
1 which answer choice correctly identifies the solute and solvent in th…
A. Water is the solvent, and sugar is the solute
-
magnesium oxide does not readily decompose into magnesium and oxygen. t…
temperature
-
this energy diagram shows the allowed energy levels of an electron in a…
| Question | Answer | |--|--| | How many excited states are there? | \(2\) | | How many lines are in the absorption line spectrum? | \(2\) | | Which transition causes the emission…
-
energy transformations student sheet bellwork: explain the various form…
| Form of Energy | Explain That Energy | Example | | --- | --- | --- | | Gravitational Energy | Energy due to height in a gravitational field | Water in a reservoir | | Elastic En…
-
question 10 as an experienced team leader, nancy uses which of these to…
D. Script schema
-
5. which water has more thermal energy? 6. describe the difference in t…
5. Hot water has more thermal energy (assuming the same amount of water). 6. Water molecules in hot water move faster and more randomly than water molecules in cold water.
-
document table table 1 headings you add to the document will appear her…
1. Chemical Energy 2. Gravitational Potential Energy 3. Elastic Potential Energy 4. Electrical Energy 5. Thermal Energy 6. Electromagnetic Energy 7. Mechanical (Kinetic) Energy
-
which of the choices is the best example of creative destruction? the p…
The typewriter industry goes bankrupt and lays off all its workers. In sharp contrast, the burgeoning electronic word processing industry hires 10,000 workers that same year. This…
-
review of energy day 1 part 1 drag and drop where you think each form o…
- **Potential Energy**: Chemical, Gravitational, Elastic - **Kinetic Energy**: Mechanical, Thermal, Electrical, Sound, Electromagnetic
-
question 39 2.67 pts which of the following products would be the best …
Bottled water
-
harvest grove is a company that produces organic breakfast cereals. to …
commercial market
-
mechanical object in motion; based on speed and mass example: thermal h…
- Mechanical: A moving car - Thermal: A cup of hot coffee - Elastic Potential: A stretched rubber band - Sound: A ringing bell
-
forms of energy energy is the _ to do _ electromagnetic ( radiant ) lig…
Energy is the ability to do work. Electromagnetic (radiant) example: Sunlight. Chemical (food/fuel) example: Bread. Gravitational Potential example: Book on a high shelf. Electric…
-
question 18 in a gas mixture of nitrogen, oxygen, and helium the pressu…
Question 18: \(434\) torr Question 19: \(2084\) torr
-
question 14 in a beaker of volume 15.45 l there are 6.25 moles of a gas…
\( 3.11\ L \) (rounded to two decimal places)
-
a sample of carbon monoxide gas occupies 3.59 l at 125 0c. at what temp…
\(-134.5^{\circ}C\) (rounded to one - decimal place)
-
question 11 5 points a sample of argon gas occupies a volume of 525 ml …
\(3250\space mmHg\)
-
you grow lots of different herbs and spices on your certified organic f…
Sort by end - use application, such as food preparation versus food product production.
-
24. most elements are combined with other elements in nature. a chemist…
分解反应。因为分解反应能使化合物分解产生单质等，符合从化合物中分离出元素（单质）的需求。
-
when visiting the dead sea you find it really easy to float in the wate…
The high salinity makes the water really dense.
-
solve the equation for t₁. \\frac{p₁v₁}{t₁}=\\frac{p₂v₂}{t₂} t₁=□ (type…
\(\frac{P_1V_1T_2}{P_2V_2}\)
-
7 écrivez les équations de dissociation électrolytique des substances s…
a) \( \text{Al(OH)}_3(s) ightleftharpoons \text{Al}^{3+}(aq) + 3\text{OH}^-(aq) \) b) \( \text{Be}_3\text{P}_2(s) ightleftharpoons 3\text{Be}^{2+}(aq) + 2\text{P}^{3-}(aq) \) c) \…
-
four out of the five electron configurations below represent ground sta…
Sc: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}4p^{1}\)
-
which of the following is an isoelectronic series? b^{5 - },sr^{4 - },a…
\(O^{2 -},F^{-},Ne,Na^{+}\)
-
use the references to access important values if neede what is this nuc…
Adenosine
-
review the characteristics of chemical agents of microbial control by c…
Antimicrobial chemicals occur in liquid, gaseous, or even solid forms. They range from disinfectants and antiseptics to sterilants and preservatives, which are chemicals that can …
-
<mastering assignment - matter and minerals - attempt 1 give it some th…
- Likely to Bond: sodium and chlorine (Na and Cl), magnesium and oxygen (Mg and O), potassium and bromine (K and Br), potassium and chlorine (K and Cl) - Unlikely to Bond: oxygen …
-
section 6.2 classification of the elements in your textbook, read about…
1. h. nitrogen (N) 2. f. iodine (I) 3. n. zinc (Z) 4. a. boron (B) 5. k. silicon (Si) 6. i. platinum (Pt) 7. l. strontium (Sr) 8. o. xenon (Xe) 9. g. iron (Fe) 10. d. cobalt (Co) …
-
for each item in column a, write the letter of the matching item in col…
18. b 19. c 20. d 21. a 22. e 23. False (three) 24. False (metals) 25. True 26. False (Group 2) 27. True 28. False (noble gases) 29. False (non - metals)
-
fill in the right parts to the questions blanks that are missing elemen…
| Element Name | Element Symbol | Atomic Number | Period | Group Number | Valence Electron | | --- | --- | --- | --- | --- | --- | | Helium | \(He\) | \(2\) | \(1\) | \(18\) | \(2…
-
part e why is glass is not considered a mineral? view available hint(s)…
Glass has a disorderly atomic structure.
-
please put the mass, element symbol, atomic number, and element name in…
- 31 amu: Phosphorus (\(P\)) - 20: Calcium (\(Ca\)) - Sulfur: \(S\), 32 amu
-
part c a scientist creates diamonds using high - pressure laboratory ex…
Minerals must occur naturally.
-
minerals must be solid, have an orderly atomic structure, have a recogn…
be generally inorganic in origin
-
part a regardless of their size, most rocks are made up of _. view avai…
minerals
-
multiple - choice question bohr concluded what regarding electrons? boh…
They orbit the nucleus in fixed paths called orbitals.
-
what did rutherford conclude from his gold foil experiments? ¿qué concl…
Both choices are correct.