Chimie
Réactions chimiques, stœchiométrie, structures moléculaires et propriétés.
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list as many similarities between these three species as you can. check…
- All contain nonmetals only. - All have a charge. - All represent anions. - All contain 1 sulfur atom (depending on the specific species, but likely intended).
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part a write the correct formula for each species: sulfur dioxide, sulf…
$SO_2, SO_3, SO_4^{2 - }$
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a compound contains only nitrogen and oxygen and has a formula mass of …
\(N_2O\)
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calculate the formula mass for hydroiodic acid. express your answer in …
\( 127.91 \) amu
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give the correct formula for hydroiodic acid. express your answer as a …
\( \text{HI} \)
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part f calculate the formula mass for copper(i) sulfite. express your a…
\( 207.17 \)
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give the correct formula for copper(i) sulfite. express your answer as …
\(Cu_2SO_3\)
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part d calculate the formula mass for dinitrogen trioxide. express your…
\( 76.02 \)
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part c give the correct formula for dinitrogen trioxide. express your a…
$N_2O_3$
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part b calculate the formula mass for barium iodide. express your answe…
391.13
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part a give the correct formula for barium iodide. express your answer …
\(BaI_2\)
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c₇h₁₆ express your answer in atomic mass units to two decimal places. f…
100.20
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part b c₆h₁₂o₆ express your answer in atomic mass units to two decimal …
180.16
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what is the formula mass of a compound? - it is the sum of the atomic m…
The option "It is the sum of the atomic mass of all elements in the chemical formula." (the first radio button option in the list of three)
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part b four calcium carbonate formula units express your answer as an i…
20
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part a four dinitrogen monoxide molecules express your answer as an int…
12
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part a four dinitrogen monoxide molecules express your answer as an int…
12
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four dinitrogen monoxide molecules express your answer as an integer.
12
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complete the third cell of the fourth row by providing the name of the …
Type of Compound: Ionic; Name: lead(IV) oxide
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complete the second cell of the fourth row by indicating the type of th…
Type of Compound: Ionic; Name: lead(IV) oxide
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complete the second cell of the third row by indicating the type of the…
Formula: \(N_2O_5\); Type of Compound: Molecular; The selected option for Type of Compound is Molecular.
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complete the first cell of the third row by providing the chemical form…
Formula: \(N_2O_5\) Type of Compound: Molecular
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complete the second row by indicating the type of the compound. formula…
Acid (Wait, no, the options are Ionic, Molecular, Acid. So the correct option is Acid? Or Molecular? Wait, let's check again. The compound $\ce{H_{2}S}$ is a molecular compound (c…
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which statement best describes the appeal macbeth creates in these line…
B. He creates logos by giving reasons they should abandon the idea of assassinating Duncan.
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complete the first row by giving the name of the compound. formula: caf…
Calcium fluoride
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the name trisodium phosphate is incorrect for the compound na₃po₄ becau…
A. you cannot use a prefix for the first element of an ionic compound
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what is the correct name for the bro₄¹⁻ ion? ○ perbromate ○ bromite ○ b…
A. perbromate
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part a what is the correct formula for potassium dichromate? ○ kcr₂o₇ ○…
C. \(K_2\text{Cr}_2\text{O}_7\) (assuming the third option is labeled C; if the original options have labels like A - E, adjust accordingly, but based on the list, the third optio…
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according to dalrymples the frivolity of evil, which of the following a…
For the first question: Unhappiness is generally caused by bad choices in life, whereas depression is viewed as a medical condition that is independent of the manner in which one …
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question 4 (1 point) masscalc2. determine how many grams of water will …
36 g (the option with 36 g)
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masscalc1. determine how many grams of oxygen are required to react wit…
32 g (corresponding to the option "32 g")
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question 2 (1 point) listen limitproduct3. this reaction is about the f…
2.0 moles (corresponding to the option "2.0 moles")
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question 1 (1 point) listen limitproduct5. this reaction is about the f…
1.8 moles
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question 1 *according to daltons atomic theory, atoms were indivisible;…
a) Cathode ray tube #### Part b
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question 5 what cooking method uses the direct heat from fire, radiatio…
D. dry ### Question 6
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question 3 what is it called when direct heat browns the food, thereby …
A. caramelization
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8. for the reaction: n₂(g) + 3 h₂(g) → 2nh₃(g) a) if 2.5 liters of n₂ r…
a) 5 liters b) Approximately 3.8 grams (or 3.79 grams)
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8. for the reaction: n₂(g) + 3 h₂(g) → 2nh₃(g) a) if 2.5 liters of n₂ r…
a) 5 liters b) Approximately 3.8 grams (or 3.79 grams)
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pages 295-295 what is the term to describe each change of state? liquid…
Liquid to a gas - Vaporization; Gas to a liquid - Condensation; Solid to a gas - Sublimation.
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fill in the blank question if 27.0 g of mercury (hg) occupies a volume …
13.5
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2 F_2(g) + O_2(g) → 2 OF_2(g)$
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a chemist equally distributes 0.5 liters of a solution among 10 beakers…
C. \(0.05\) L
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multiple choice question which type of chemotherapy involves the use of…
A. antimicrobial chemotherapy
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multiple choice question 4 of 80 concepts completed a drug that is prod…
synthetic (the option labeled "synthetic")
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multiple choice question a drug that is produced naturally by an organi…
C. semisynthetic (assuming the third option is labeled C; if the original labels are different, adjust the identifier, e.g., if it's the third circle, "the third option: semisynth…
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the use of drugs to control infection and diseases caused by many types…
chemotherapy
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an antimicrobial drug that is produced in the laboratory entirely by ch…
synthetic
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multiple choice question a general term for the use of drugs to control…
C. antimicrobial chemotherapy
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multiple choice question ______ is the use of a drug to prevent infecti…
D. Prophylaxis
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which of the following molecules are stabilized by delocalized π orbita…
molecule a, molecule b, molecule d
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identify the hybrid orbitals used by the inner atom of molecule whose l…
\(sp(2)\)
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current attempt in progress identify the hybridization of the underline…
\(sp(2)\)
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part 5 1 2 3 4 oh nc 5 1 = sp³; 2 = sp³; 3 = sp²; 4 = sp³; 5 = sp³ 1 = …
\(1 = sp^{3};2 = sp^{3};3 = sp^{2};4 = sp^{3};5 = sp\) (the last option in the given choices)
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1 f f f f f f f sp³d³ sp³ sp³d sp sp³d² sp²
\(sp^{3}d^{3}\)
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1 2 h₂n nh₂ 1 = sp³; 2 = sp² 1 = sp³; 2 = sp³ 1 = sp²; 2 = sp² 1 = sp²;…
\(1 = sp^3; 2 = sp^2\)
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1 = sp³; 2 = sp²; 3 = sp²; 4 = sp³; 5 = sp² 1 = sp²; 2 = sp³; 3 = sp³; …
\(1 = sp^{2};2 = sp^{3};3 = sp^{3};4 = sp^{3};5 = sp^{3}\)
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predict the type of hybrid orbitals used by each of the indicated inner…
\(1 = sp^{2};2 = sp^{2};3 = sp^{3}\) (the fourth option in the given choices)
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lewis structure a
# Explanation: ## Step1: Identify[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]
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8.3×10⁻³ mol c express your answer using two significant figures. n = a…
$5.0 \times 10^{21}$ atoms
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2.8 mol cu express your answer using two significant figures. n = atoms
\(1.7 \times 10^{24}\)
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how many formula units make up 12.2 g of magnesium chloride (mgcl₂)? ex…
$7.71×10^{22}$
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(c) ms. rivera studied her students chemistry test scores and tv habits…
There is a correlation between test score and amount of TV watched. There may or may not be causation. Further studies would have to be done to determine this.
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you learned how to convert molecules to moles in part a. in part c you …
1.66 g
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using molar mass and cameine match the numbers in the left column to th…
1. 1.2 2. 16 3. 7.0 4. 28
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crn 20605 angeles garcia question part 4 of 4 completed: 1 of 11 my sco…
$63,000
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2025 fall - crn 20605 question part 3 of 4 completed: 1 of 11 | my scor…
$147,000
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which is the most accurate description of how the coolant works in an e…
A. Coolant absorbs thermal energy.
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which best describes how combustion works? ○ it breaks and forms bonds …
A. It breaks and forms bonds of fuel to release thermal energy.
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a flashlight uses the chemical energy stored in a battery. this chemica…
B. radiant and thermal
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question 8 of 25 read the following excerpt from \the world without us\…
A. The passage describes the effects of rain in the posthuman world to highlight that nature will eventually neutralize the pollution created by people.
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after suffering an ischemic stroke, cindy finds that she cannot move he…
B. Right frontal lobe
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question 3 of 20 which sentence is capitalized correctly? a. my easiest…
A. My easiest classes are Chemistry and Spanish.
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a cook uses a microwave oven to heat a meal. the wavelength of the radi…
The energy of one photon is approximately \( 1.66\times 10^{-23}\ \text{J} \), and the number of photons is approximately \( 1.30\times 10^{28} \) (or more precisely \( 1.304\time…
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what chemical causes the flavor category of umami? toxins electrolytes …
Amino acids
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section b: 55 marks 14. a) define the term progressive waves. (1 mark) …
a) A wave that transfers energy through a medium without net movement of the medium itself. b) i) Longitudinal wave ii) X: Compression; Y: Rarefaction iii) 100 Hz c) I) 320 m/s II…
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1. use the words below to complete sentences a - e. charge anions posit…
### Part 1: Sentences a. atom; atoms; charge b. lose; positively c. gain; negatively d. cations; anions e. ionic ### Part 2: Table | Atomic symbol | Electron config. | Metal or no…
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2s(s) + 2o₂(g) ⇌ 2so₂(g) k₁ = 2×10¹⁰⁵ 2so₂(g) + o₂(g) ⇌ 2so₃(g) k₂ = 7×…
A. $1 \times 10^{130}$
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what is the name of the artistic movement that emerged in the late nine…
B. Art Nouveau
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homework: mixed mole problems now you try! remember to show all work an…
1. \(1516\space g\) 2. \(5.22\space mol\) 3. \(0.0141\space mol\) 4. \(992\space L\)
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what is used to treat hiv/aids? a. antiretroviral medications b. chemot…
A. antiretroviral medications
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y) zinc hydrogen sulphate z) fe₂(so₄)₃
iron(III) sulfate (or ferric sulfate)
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read the paragraph, and then complete the model. fossil fuels are subst…
Atmosphere - Biosphere
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10. which of the following best explains why the brain tells the respir…
displaced oxygen molecules
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matter and its changes a. changes of matter 1. matter changes with the …
s: A.1. color; temperature A.2. physical; chemical B.1. chemical identity (or composition) B.2. Dissolving (or Mixing) B.3. physical change B.4. thermal energy (or kinetic energy)…
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lesson 2 content vocabulary matter and its changes directions: in this …
To solve the word search for the remaining terms ("chemical change", "law of conservation of mass", "physical change"), we analyze the grid: ### Step 1: Locate "chemical change" S…
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3. a change in matter in which the substances that make up the matter c…
Chemical Change
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1. total mass before and after a chemical reaction is the same
Law of Conservation of Mass (related to Chemistry, Natural Science)
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directions: tell whether the following changes are physical (p) or chem…
C, N ### Question 9: Salt dissolving
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7. what happens to the total amount of mass during a physical or chemic…
The total amount of mass remains constant (is conserved) during a physical or chemical change, as mass is neither created nor destroyed (due to the law of conservation of mass).
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5. what is the only sure sign of a chemical change?
The only sure sign of a chemical change is the formation of a new substance (through a chemical reaction that creates a substance with distinct chemical properties from the reacta…
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one responsibility of the employer is to consider if there are any othe…
Product substitution
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the hazcom requires all of the following to be included on chemical lab…
Safety Data Sheets
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to find the proper firefighting measures for a hazardous substance on a…
B. The safety data sheet
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the minimum temperature at which a liquid produces enough vapor to form…
C. Flashpoint
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the hazard communication standard includes which of the following? empl…
All of the above.
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in english class, edward learned what a metaphor is and how to identify…
semantic; concept
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in very stressful or embarrassing situations, sanura is able to maintai…
C) Emotional intelligence
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a community takes action to reduce chemical release at an industrial pl…
to reduce the number of premature deaths associated with ultrafine particle exposure
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at a job interview for her dream job, darla knows that she is expected …
C) event schema
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question 12 (1 point) what structure is shown in the following image?
Phospholipid