Química
Reacciones químicas, estequiometría, estructuras moleculares y propiedades.
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question 1 four options are provided as possible answers to the followi…
s: 11.1 C 11.2 B 11.3 D 11.4 C 11.5 A
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6. why is a bunsen burner flame hotter than a normal gas flame?
La llama de un Bunsen burner es más caliente que una llama de gas normal porque el Bunsen burner permite una **combustión más completa** del gas. Esto se debe a su diseño, que mez…
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5 how are atoms similar and different from each other? similar \t diffe…
| Similar | Different | |---------|-----------| | Basic structure, Charge (for neutral atoms) | Numbers of protons, neutrons, and electrons, Mass, Size |
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refer to the atomic models of helium and lithium to complete the table.…
- Number of neutrons (helium): 2 - Number of electrons (lithium): 3 - Mass of the atom (helium, amu): 4
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3 phosphorus atoms are important for your bones and teeth. in its nucle…
B. 15
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4. why wear goggles while working with chemicals and glassware? 5. when…
To protect the eyes from chemical splashes, fumes (if any), and injury from broken glassware. Chemicals can cause burns or irritation, and broken glass shards can injure the eyes;…
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1. in which of the following locations should you dilute a cleaning che…
D. Utility room with open windows ### Question 2
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the old violin by william michael harnett courtesy national gallery of …
B. creating a white square behind the violin.
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the lighthouse at honfleur by georges seurat courtesy national gallery …
B. used geometric shapes to create the lighthouse and the buildings.
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one hundred eighteen types of atoms combine to make up all matter on ea…
protons
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which of the following processes oxidizes nitrogen? electrical storm ha…
A. Electrical storm
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3 according to the model, what part of an atom contains most of its mas…
B. Most mass is in the atom’s nucleus (center)
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2 an atom’s mass is measured in atomic mass units (amu). try adding mor…
Protons, Neutrons
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model 1 - laboratory attire this student is dressed inappropriately for…
- Long, loose hair. - Open - toed shoes (sandals). - Shorts. ### 3b
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what practices are followed to ensure safety in the laboratory? why? ac…
Biohazard bags are typically red (or orange in some cases, but red is the most common standard color for biohazard waste disposal bags).
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simulation in this model, the orange x and dotted circles represent the…
- Proton: Center - Neutron: Center - Electron: Around the outside
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26. using words, explain the meaning of each of the three trends (atomi…
### Atomic Radius - **Meaning**: Atomic radius is a measure of the size of an atom, typically defined as the distance from the nucleus to the outermost electron shell. - **Trend i…
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academic laboratory accidents are estimated to occur 10–50 times more f…
s: a. (General guideline) Label the area near biohazard workstations (e.g., near biological safety cabinets, PPE stations, or designated biohazard waste collection zones) on the d…
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multiple choice (3 points each) identify the choice that best completes…
a. Halogens ### Question 2
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unit 1 summative: matter in motion 1.1 i can explain everyday examples …
The partial pressure of oxygen is $0.113\ atm$ (rounded to three decimal places) or $0.11308\ atm$. ### Sub - Question 2: Volume of the Basketball using Ideal Gas Law
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atoms have not changed since the 1800s, but the model of the atom has c…
The atom itself is a physical entity that does not change over time (its fundamental structure of protons, neutrons, electrons in a nucleus - electron cloud system is stable). How…
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like iron and gold mentioned in the movie, aluminum is an element. what…
C. It is made of many aluminum atoms
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19. according to the octet rule, what will sulfur do to fill its outer …
d. Gain 2 electrons ### Question 20
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2 fill in the blanks to complete the sentences. not all answer choices …
First blank: Elements Second blank: atoms Third blank: identical
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guiding question what are atoms? movie watch the movie to learn more ab…
A. Atoms are too small to see
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singular singular subject verb read these sentences from the passage. t…
(for Sentence 1): - Underlined subject: $\underline{\text{the water above}}$ - Circled verb: $\boldsymbol{\text{exerts}}$ (already circled in the image, but for clarity, the verb …
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select the dependent clause. after a lightning bolt passes through the …
After a lightning bolt passes through the air
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atomic structure: atoms, ions, & isotopes name: _______________________…
## Tabla completada: | Isótopo | Símbolo Nuclear | Número Atómico | Número de Masa | # de protones | # de neutrones | # de electrones | |---------------|-----------------|--------…
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sls: materials use the information below to answer the question when de…
$50 - 60 per kilogram
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complete the rhyme scheme. life has loveliness to sell, music like a cu…
To determine the rhyme scheme, we analyze the end - sounds of each line: ### Step 1: Analyze the first line The first line is "Life has loveliness to sell,". We assign it the lett…
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complete the rhyme scheme. all nature seems at work. slugs leave their …
Line 1: A Line 2: B Line 3: A Line 4: B Line 5: B Line 6: B
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ch. 2 - particles of matter quiz started: sep 10 at 2:14pm quiz instruc…
the prediction of the existence of undiscovered elements
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powder bed fusion technologies (sls) use the information below to answe…
B. a thermoplastic polymer powder
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complete the rhyme scheme. so with the stretch of the white road before…
Line 1: A Line 2: B Line 3: A Line 4: B Line 5: C Line 6: C
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read the scenario. what is the control? control: scenario: a student wa…
Beaker A (with 100% water)
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complete the rhyme scheme. golden and red trees nod to the soft breeze,…
| Line | Rhyme Scheme | |------|--------------| | Golden and red trees | A | | Nod to the soft breeze, | A | | As it whispers, "Winter is near"; | B | | And the brown nuts fall | …
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10. calcium ions play an important role in the function of neurons in t…
c. Strontium ### Question 11
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read the scenario. what is the dependent variable? scenario: a student …
The dependent variable (DV) is the freezing point of water.
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10. calcium ions play an important role in the function of neurons in t…
c. Strontium ### Question 11
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read the scenario. what is the independent variable? scenario: a studen…
The amount of antifreeze added to water
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complete the rhyme scheme. under a spreading chestnut-tree the village …
Line 1: A Line 2: B Line 3: A Line 4: B Line 5: C Line 6: B
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complete the rhyme scheme. to be brown like thrush and lark! like the s…
The rhyme scheme is filled as follows: - Line 2: A - Line 3: B - Line 4: B - Line 5: B - Line 6: B (If we follow the initial assignment where line 1 is A, then line 2 is A (rhymes…
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complete the rhyme scheme. i wandered lonely as a cloud \t\t| that floa…
Line 1: A Line 2: B Line 3: A Line 4: B Line 5: C Line 6: C
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complete the rhyme scheme. white, glittering sunlight fills the market …
The rhyme scheme (from top to bottom of the lines) is A, B, B, C, A, B. So the boxes should be filled as follows: - First box: A - Second box: B - Third box: B - Fourth box: C - F…
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for each pair, which has the highest boiling point? chemical structures…
D. Propane ( $\ce{CH3CH2CH3}$ ) and trans - 1,2 - difluoro - 1 - butene (or similar di - fluoro alkene with higher molecular weight)
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complete the rhyme scheme. the sun was shining on the sea, shining with…
To determine the rhyme scheme, we analyze the end - words of each line: ### Step 1: Analyze the first line The first line ends with "sea". We assign it the letter "A". ### Step 2:…
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complete the rhyme scheme. across the sky a lowly sigh from west to eas…
- Across the sky a lowly sigh: A - From west to east the sweet wind carried;: B - The sun stood still on Primrose Hill;: C - His light in all the city tarried;: B - The clouds on …
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complete the rhyme scheme. what says the wind to the waving trees? what…
| Line | Rhyme Scheme Letter | |------|---------------------| | What says the wind to the waving trees? | A | | What says the wave to the river? | B | | What means the sigh in the…
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which uses correct mechanism arrows? a. chemical structure with h₃o⁺ an…
C
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what are three physical properties of matter you would find in group 1 …
A. low melting point, B. soft, D. silver in color
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completing the sentence choose the word from the box that best complete…
s: 1. villains 2. strategy 3. numerous 4. assaulted 5. shrewd 6. misleading 7. convert 8. impressive 9. justified 10. dispute 11. abandon 12. productive
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why do some brains enjoy fear? - test (lms graded) language development…
C. Sentence 1 uses ordinary terms to convey a general idea. Sentence 2 uses scientific terms to provide precise information
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properties of matter / states of matter 20. define kinetic theory (refe…
Kinetic Theory (in States of Matter context) states all matter is made of tiny, constantly moving particles (atoms/molecules/ions); particle motion (kinetic energy) and inter - pa…
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which substance is known as the universal solvent because it can dissol…
Water
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a pure solid sample of substance x is put into an evacuated flask. the …
(First Question): 150
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a pure solid sample of substance x is put into an evacuated flask. the …
150 (assuming the graph's horizontal segment for boiling is at 150 °C; exact value depends on graph scale, but typical from the plot shown, the boiling point flat is at 150 °C)
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determine whether each statement is an example of a physical change or …
chemical ### For "Wax melts on a hot stove":
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a pure solid sample of substance x is put into an evacuated flask. the …
\( 150 \) ### Second Question: Phase after 16 kJ/mol Heat
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determine whether each statement is an example of a physical change or …
chemical (the checkbox next to "chemical" should be selected) ### For "Dry ice (solid carbon dioxide) vaporizes to form carbon dioxide gas":
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properties of matter / states of matter (reference states of matter) ga…
- Gas: The molecules have \(\boldsymbol{\text{high energy (or 'a lot of space'/'freedom to move')}}\) and are \(\boldsymbol{\text{far}}\) off each other. (Common correct fills: "a…
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determine whether each statement is an example of a physical change or …
chemical (the checkbox next to "chemical" should be selected)
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168. mg of an unknown protein are dissolved in enough solvent to make 5…
\(\boldsymbol{6.5\times10^{3}\ \frac{\text{g}}{\text{mol}}}\) (or more precisely \(6.47\times10^{3}\ \frac{\text{g}}{\text{mol}}\) depending on significant figures; the given valu…
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determine whether each statement is an example of a physical change or …
physical
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hypothesis (6 pts.) \sodium bicarbonate is added to calcium chloride an…
To determine the average values for each row in Table II, we use the formula for the average (mean) of a set of numbers: \[ \text{Average} = \frac{\text{Sum of values}}{\text{Numb…
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properties of matter / states of matter (reference states of matter) ga…
- Gas: The molecules have \(\boldsymbol{\text{a lot of energy (high kinetic energy)}}\) and are \(\boldsymbol{\text{far}}\) off each other. - Liquid: The molecules are \(\boldsymb…
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247. mg of an unknown protein are dissolved in enough solvent to make 5…
\(2.22\times 10^{4}\ \frac{\text{g}}{\text{mol}}\)
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the molal freezing point depression constant ( k_f = 7.11 , ^circ\text{…
\(1.1\ ^{\circ}C\) (or \(1.14\ ^{\circ}C\) depending on significant figure considerations, but likely \(1.1\ ^{\circ}C\) or \(1.1\) (with correct sig figs))
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ex) phosphorus, p atomic # = 15 (top # in h box on the periodic table) …
The correct number of neutrons for Helium is 2 (the original 3 was incorrect). The steps show that using \( \text{\# Neutrons} = \text{Mass \#} - \text{Atomic \#} \), with Mass \#…
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a certain substance x has a normal boiling point of 133.5 °c and a mola…
$\boxed{51.3}$ (in grams, with appropriate significant figures)
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directions for #3-6: when drawing atoms, the 1st shell is like a front …
- Mass # = 4 - # Electrons = 2 - # Neutrons = 2 - Drawing: A nucleus (circle) with 2 protons and 2 neutrons, and a single electron shell (circle around nucleus) with 2 electrons.
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apply it talk about it think about other examples that involve both phy…
| Change | Chemical or Physical | Reason | | --- | --- | --- | | Melting of wax | Physical | Wax changes state (solid to liquid), no new substance. | | Burning of wax | Chemical |…
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a certain substance x has a normal freezing point of 0.2 °c and a molal…
\(-1.46\) (or \(-1.5\) depending on sig fig interpretation, but the precise calculation gives approximately \(-1.46\space^{\circ}\text{C}\))
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a certain substance x has a normal freezing point of -7.2 °c and a mola…
33.1 g
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as you move across the periodic table, atoms tend to get smaller. this …
They have more protons
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as you move across the periodic table from left to right, the atomic ra…
A. the number of protons increases, so attraction to electrons increases
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which of the following has the greatest ionization energy? options: o, …
He (Helium) has the greatest ionization energy. Among the options, the correct one is the choice with "He".
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32/35 the atom with the largest atomic radius in group 18 is - ar kr he…
Rn (Radon)
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which of the following will have a lower ionization energy than scandiu…
Calcium (Ca)
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which group of elements has the lowest ionization energies? options: - …
A. Alkali Metals (Group 1)
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the atom with the largest atomic radius in group 18 is - options: he, r…
Rn (the option with "Rn" text)
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can you use melting point to determine the identity of an unknown solid…
gallium
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which atom has the largest radius s br mg b
Mg (the atom with symbol Mg) has the largest radius.
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what is a vertical (up and down) column in the periodic table? options:…
C. group or family
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25/35 which has a lower ionization energy: lithium or potassium? lithiu…
Potassium
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as atoms in group 15 are considered in order from top to bottom, the el…
B. decreases
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25/35 electronegativity ________ from left to right within a period and…
C. increases, decreases (assuming the third option is labeled C; if the original options had labels like A, B, C, D with the third being C, then the answer is C. increases, decrea…
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select all the nonmetals (choose all that apply) p in na h
P, H
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which of the following properties are intensive, and which are extensiv…
- Malleability: $\boldsymbol{\text{intensive}}$ - Hardness: $\boldsymbol{\text{intensive}}$ - Length: $\boldsymbol{\text{extensive}}$ - Volume: $\boldsymbol{\text{extensive}}$
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which of the following halogens has the greatest electronegativity? iod…
Chlorine (Cl)
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virginia preservice training for child care staff question 4 what infor…
e. a and b.
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which atom has the largest atomic radius? cesium potassium francium rub…
francium
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experiment: rock candy is formed when excess sugar is dissolved in hot …
It is likely that more rock candy will be formed in batch A. ### Second Experiment (Salt Deposition)
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the energy required to remove electrons is the definition of: atomic nu…
D. Ionization
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which atom is more electronegative? options: cl, k, b, rb
Cl (Chlorine)
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what term is used to describe \a measure of the size of an atom\ (17/35…
B. atomic radius (assuming the options are labeled A: energy levels, B: atomic radius, C: orbit, D: chemical reactivity as per the order in the image)
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7. the moor is of a free and open nature / that thinks men honest that …
- **Simile**: "will as tenderly be led by th' nose / As asses are" - **Iago's Statement on Othello**: Othello is trusting (sees others as honest if they seem so) and gullible (eas…
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16/35 as you move across a period, do the atoms get smaller or larger? …
smaller
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two 250 ml samples of water are drawn from a deep well bored into a lar…
No precipitate will form in Sample #2.
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15/35 what is the name of family i halogen family boron family alkali m…
C. Alkali Metals (assuming the options are labeled A: Halogen Family, B: Boron Family, C: Alkali Metals, D: Alkaline Earth Metals; if labels differ, adjust to the correct labeled …
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experiment | predicted observation (choose one) two 250 ml samples of w…
No precipitate will form in Sample #2. ### Second Experiment (Carbonated Soft Drink Bubbles)