Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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page 2 of 4 dp alum : kal(so₄)₂·12h₂o ap alum + 3h₂(g) = 6 - hydrogen 5…
### Reflection Question 1 Explanation: To determine the step responsible for low yield in alum synthesis, we analyze common synthesis steps (e.g., precipitation, filtration, cryst…
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it does not have a set meter. it is a poem with a fixed form. it does n…
The incorrect statement is: It is a poem with a fixed form.
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b) energy is always lost c) energy can only be changed from one form to…
C) Potential energy ### Question 5
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b) energy is always lost c) energy can only be changed from one form to…
C) Potential energy ### Question 5
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esta imagen es un ejemplo de un(a) compuesto mezcla molécula átomo
D. Átomo
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5. what is the atomic mass of an element with 3 isotopes with the follo…
s: 5. Atomic mass: \(\boldsymbol{42.65}\) amu 6. Atomic mass: \(\boldsymbol{\approx 32.09}\) amu 7. Element: \(\boldsymbol{\text{Chlorine (Cl)}}\)
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part 1: atom screen 1. which particle(s) are found in the center of the…
Protons and neutrons ### Question 2
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describe la relación de los átomos mostrados arriba. un cambio en el es…
A. Un cambio en el estado de la materia de líquido a gas es un cambio físico.
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14.5789 - 0.5009 = 14.0789 14.0789 g × \\frac{1\\,\\text{mol al}}{26.98…
\boxed{89.26} (or depending on significant figures, maybe 89.2 g or 89.3 g, but based on calculation, ~89.26)
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durante la clase de ciencias, mientras estudias mezclas, mezclas azúcar…
solubilidad; Agrega agua a la mezcla y disuelve el azúcar
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suponga que tiene un recipiente lleno de hierro y arena. puede separar …
A. utilizas un imán; mezcla
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3. what is the atomic mass of phosphorous if phosphorous-29 has a perce…
The atomic mass of phosphorous is approximately \( 29.86 \) amu (or rounded as needed, often close to 30 amu considering significant figures, but the calculated value is ~29.86). …
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¿qué imagen(es) se considerarían sustancias puras? image of five molecu…
B. II y IV (assuming the purple option is labeled B, as per the visual: purple is "II y IV", green "I y II", orange "III y V", teal "V")
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según la escala, ¿cuál de estas sustancias es el ácido más fuerte? opci…
jugo de limón
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directions: go to the phet simulation \build an atom\ to answer the fol…
protons, neutrons ### Question 2
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sort the data collected about the element copper into qualitative or qu…
### Qualitative Data - red - orange color - easy to stretch into wire - solid at room temperature ### Quantitative Data - density of \(8.96\space g/cm^{-3}\) - melting point of \(…
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worksheet #2 – isotopes & average atomic mass answer the following ques…
An isotope is a variant of an element with the same atomic number (same number of protons) but a different number of neutrons (different mass number). ### Question 2
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el gráfico muestra que la tasa de reacción y la temperatura están _____…
C. directamente, aumenta (assuming the orange option is labeled C; if the labeling is different, adjust the identifier but keep the text "directamente, aumenta")
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unit 1 harnessing human energy: review fill in the blank: fill in the b…
### Fill in the Blank Answers: 1. The energy stored in an object is called \(\boldsymbol{\text{potential}}\). 2. The energy of a moving object is called \(\boldsymbol{\text{kineti…
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which observation is the most objective? - the crystals in this image r…
The crystals in this image are jagged and white and developed on the green string between the two solution - filled glass jars
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read the poem. skimming the bottom in the company of toes, i observe th…
The poem's rhyme scheme is \( \boldsymbol{ABCBDEFE} \) (or a more simplified view where lines 2 & 4 rhyme (B - B) and lines 6 & 8 rhyme (E - E), with the other lines having unique…
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the passage below describes an experiment. after a severe winter storm,…
a control group
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what is the purpose of an msds? ○ to prevent service technicians from l…
C. To document how to safely handle and dispose of hazardous materials
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element name: boron, na, gallium, blank, tc, lead atomic symbol w/ isot…
To solve the missing parts of the table, we use the relationships between atomic number, protons, neutrons, electrons, mass number, and charge: ### 1. For the row with atomic numb…
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sls: materials use the information below to answer the question. when d…
A. alumide
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7. the data table in question 6 should allow you to state a relationshi…
increases
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this passage describes a chemical reaction. read the passage. then, fol…
product
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ammonia is commonly used as a fertilizer for plants. it is made when ni…
- Number of H atoms: \( 24 \) - Number of N atoms: \( 8 \) - Molecules of \( NH_3 \): \( 8 \)
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this passage describes a chemical reaction. read the passage. then, ans…
- sodium (Na) (selected) - nitrogen ($N_2$) (selected) - sodium azide ($NaN_3$) (unselected)
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4) use the mass spectrum below to fill out the information in the table…
To solve this, we analyze the mass spectrum and use atomic structure knowledge (protons = atomic number, neutrons = mass number - protons, mass from spectrum, abundance from relat…
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animal milk is a natural source of the disaccharide lactose. the monosa…
A. The monosaccharides in lactose are galactose and glucose. B. Sucrose and lactose have the same chemical formula. C. Sucrose and lactose have different chemical structures. D. T…
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11 fill in the blank 1 point the phase that has the least energy is: an…
solid
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kmt 9 multiple choice 1 point which box represents the kinetic energy i…
B
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kmt a b c previous 3 multiple choice 1 point box c represents which pha…
A. Gas
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1.9 - kmt and phases after reviewing todays material, answer the follow…
A. Liquid
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consider the reaction cl₂(g) + br₂(g) → 2 brcl(g) at 25 °c. using the i…
\(11.6\)
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learning to draw atoms name zanashah /20 pts we learned that the atom h…
2 #### b. Step1: Recall 2nd shell capacity The 2nd electron shell can hold a maximum of 8 electrons.
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rank the metals from most reactive (1) to least reactive (3) silver str…
Silver: 3 Strontium: 1 Technetium: 2
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activity wellness in your life directions: complete the sentences below…
s to the Fill - in - the - Blank Questions (1 - 6) 1. **Explanation for Question 1**: - The sentence is about accepting and managing one's limits and making the most of oneself, w…
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given $\\delta h = -46.2$ kj/mol and $\\delta s = -389.0$ j·mol⁻¹·k⁻¹, …
\( 176.0 \) (or if T is 298 K, 70.7, but based on the given 298.0 °C, it's 176.0)
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# | scrambled word | unscrambled word | definition 9 | omtsa | | 10 | n…
Unscrambled Word: Matter Definition: Anything that has mass and takes up space ### Question 10
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exam lesson name: introduction to oceanography exam number: 700793rr - …
A. between the negatively charged oxygen of one water molecule and a positively charged hydrogen of another water molecule.
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table with rows 9 to 14 (columns likely include scrambled word, unscram…
The image seems to have some text distortion. But from the word bank (Atoms, Elements, Mass, Physical change, Chemical change, Heterogeneous mixture, Matter, Pure substance, Chemi…
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periodic table search name: aida... using your colored periodic tables,…
Let's solve these periodic table questions one by one: ### Question 1: Which element is number 14 on the periodic table? - Step 1: Recall that the atomic number (the number on the…
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how many mol of na₃po₄ are in 175.0 g of na₃po₄? ○ 1.07 ○ 0.937 ○ 170. …
1.07 (corresponding to the option "1.07")
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what is the name of the $\\text{no}_3^-$ ion? nitrite nitrous nitrate n…
C. Nitrate ### Second Question (SO₃²⁻ ion):
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enter or select the correct answer for each question. you may take this…
\( 9.03 \) ### Question 2
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passage by james e. hiley 1 king midas had a greed for gold a greed he …
D. By suggesting a conflict between Midas’s greed and his love for daughter
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how many protons are in the element fluorine?
9
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what is a unique characteristic of group 18 (noble gases)? * 1 point th…
The option with "They have a full outer shell of electrons" (the second option among the four for the Group 18 question) ### Second Question (Characteristic of Alkaline Earth Meta…
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the mass of one mole of any pure substance is its
molar mass
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in group 13 (boron family), what element is classified as a metalloid? …
A. Boron ### Second Sub - Question: Which family contains elements that exist as two gases, one liquid (Br), and two solids?
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an elements is numerically equivalent to the atomic mass of the element…
molar mass
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if the atomic mass of a manganese atom is 54.94 amu, then its blank is …
molar mass
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which family of elements has exactly one valence electron and is highly…
39 ### Second Question (Element Family)
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what is the mass in grams of 1.02×10²⁴ atoms manganese (mn)? 0.169×10¹ …
\(9.30\times 10^{1}\text{ g}\) (corresponding to the option \(9.30\times 10^{1}\text{ g}\))
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what characteristic is shared by elements in groups 3-12 (transition me…
They are less reactive than Alkali Metals
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what characteristic is shared by elements in groups 3-12 (transition me…
They are less reactive than Alkali Metals ### Second Question (Chemical Symbol for Antimony)
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which of the following is not a property of metals? poor conductors met…
poor conductors
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which is a characteristic of metals? brittle insulative malleable
malleable
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aluminum is very malleable. what does this mean? it is very shiny. it c…
It can easily be pressed into sheets.
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aluminum is very malleable. what does this mean? it is very shiny it ca…
The option (assuming the last option is "It can easily be pressed into shapes"): It can easily be pressed into shapes
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platinum is a metal that has a high luster. what does this mean? it can…
It can easily be pressed into sheets
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calculate the number of atoms in 13.2 mol copper. ○ 79.5×10²³ atoms ○ 2…
\( 7.95\times10^{24} \) atoms (corresponding to the option "7.95×10²⁴ atoms")
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left: partial text and bar chart right: platinum is a metal that has a …
The correct option (assuming the first option is the one about being pulled into a wire, e.g., if the first option is labeled as A: "It can be pulled into a wire easily", then the…
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which of the following is a property shared by many metals? they are so…
They have a shiny appearance.
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determine the number of atoms in each of the following samples: 1. 62.1…
s: 1. \( \boldsymbol{7.81 \times 10^{23}} \) atoms of Ti 2. \( \boldsymbol{2.76 \times 10^{23}} \) atoms of Ne 3. \( \boldsymbol{2.55 \times 10^{24}} \) atoms of Pb
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a balloon contains ( 4.50 \times 10^{22} ) atoms of helium (he) gas. ca…
0.299 g (corresponding to the option "0.299 g")
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decide whether 15.0 g of magnesium or 15.0 g of manganese represents th…
Magnesium
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the atomic mass for boron is 10.811 g. how many molecules are in 320 g?
Approximately $1.78 \times 10^{25}$ molecules
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triglycerides form when three fatty acid molecules combine with one mol…
3
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what is the balanced oxidation half-reaction for the following unbalanc…
a. \(Ca ightarrow Ca^{2+}+2e^-\) (and b. \(Ca ightarrow Ca^{2+}+2e^-\) as they seem to be the same option, likely a typo. The correct oxidation half - reaction is \(Ca ightarrow C…
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determine the iupac name of the below organic compound. a. 5 – bromo – …
b. 1 - Bromo - 3 methyl - pent - 2 - ene
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phishing schemes fishing is an enjoyable, relaxing pastime. “phishing” …
paragraph 4
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the solubility of solids in water___: a. is independent of the temperat…
b. increases with increasing temperature
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phishing schemes fishing is an enjoyable, relaxing pastime. “phishing” …
private
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phishing schemes fishing is an enjoyable, relaxing pastime. \phishing\ …
avoid contacting untrustworthy websites
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what is the h⁺ in a solution that has a ph of 3.35? a. 1 × 10^3.35 m b.…
c. \(4.5\times 10^{-4}\space M\)
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a solution is an example of a (an)_____ a. pure substance b. element c.…
d. homogeneous mixture
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2.4 chemical reaction 6o₂ + c₆h₁₂o₆ 1. 2. 6co₂ + 6h₂o 3. bond energy: c…
1. Reactants 2. Reaction Arrow (→) 3. Products Bond energy: Energy required to break (or released when forming) a chemical bond. Chemical equilibrium: State where forward and reve…
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which of the following is not true? ○ increasing temperatures lead to f…
water molecules become more spaced out from one another once they have evaporated
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density calculations density is the ration of mass to volume within a s…
\( 2.70\space g/mL \) ### Problem 2
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2. *what property does distillation rely on to separate substances? a. …
C. Boiling point ### Question 4
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q1 chemistry: u1l4 mixture types part 3: multiple choice questions 1. *…
C. Filtration ### Question 3
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question 1 what is the most common ionic charge of an atom of astatine?…
-1 ### Question 2: Ionization energy order (K, Ca, Cl) Ionization energy generally increases across a period (left to right) and decreases down a group. Potassium (K) is in Period…
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2. for multipl... with the least amount of signi... (table with additio…
\( 28.32\ \text{cm} \) ### 2) \( 48.0032\ \text{g} + 9.17\ \text{g} + 65.4321\ \text{g} \)
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complete the following scientific calculations and make sure to keep tr…
\( 7.5 \, \text{in}^2 \) ### Problem 2: \( 1.543 \, \text{m} \times 4.32 \, \text{m} \)
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name ______ class ______ date ______ concept review continued 16. when …
A sample of matter is a pure substance when it consists of only one type of element or compound (has a fixed composition and distinct properties). ### Question 17
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name ______ class ______ date ______ skills worksheet concept review ma…
s to Element Symbol/Name Questions: 1. C: Carbon 2. S: Sulfur 3. N: Nitrogen 4. Au: Gold 5. Hg: Mercury 6. Sn: Tin 7. silver: Ag 8. lead: Pb 9. potassium: K 10. iron: Fe 11. sodiu…
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question 2 how many atoms are in al₂(so₄)₃? (note: corrected from poten…
17
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part b – balancing practice (show your work) balance the following equa…
$\boldsymbol{\ce{2H_2 + O_2 ightarrow 2H_2O}}$ ### 2. Balancing $\boldsymbol{\ce{Na + Cl_2 ightarrow NaCl}}$
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using the reactivity series below, explain why the element gold is used…
- **Claim:** Gold is used for monetary units because it is highly unreactive. - **Evidence:** Gold is at the bottom of the given reactivity series, showing the lowest reactivity a…
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does this diagram represent a chemical change? (be sure to answer in ce…
- **Claim:** The diagram represents a chemical change. - **Evidence:** The diagram shows a reactant molecule (smaller atom group) forming a different product molecule (larger, new…
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which of the following best describes why some elements are more chemic…
The option "Chemical reactivity depends on the arrangement of an atom's electrons. Different elements have different numbers of valence electrons." (the third option with the blue…
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which metal would you expect to lose its electrons more easily? reactiv…
B. Calcium
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reactivity series of metals lithium rubidium potassium barium calcium s…
Copper
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reactivity series of metals lithium rubidium potassium barium calcium s…
B. Calcium (assuming the options are labeled, but based on the list, Calcium is the most reactive among the given choices as it’s higher in the series than Aluminum, Copper, and N…
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question 1 which element is found the fifth period and the first group …
Rubidium (Rb) ### QUESTION 2
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3) choose the best answer. compounds and their elements cannot be broke…
their properties changing ### Question 4
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1) choose the best answer. a(n) ______ is a chemical combination of ato…
A. molecule ### Sub - Question 2