Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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enter your answer in the box. the rhyme scheme of a shakespearean sonne…
gg
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ice cube (25g) is at -8.0°c. how much energy is required to completely …
\(8770J\)
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ms. jameson is using \sonnet 18\ by william shakespeare to teach her st…
aa
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ice cube (27.5g) is at -8.0°c. how much energy is required to completel…
\(9647J\)
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use the text to put the events in order. most glass is made from a comb…
1. Add washing soda to sand. 2. Heat the mixture to its melting point. 3. Shape the mixture. 4. Cool the mixture.
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acetic acid and ethanol react to form ethyl acetate and water, like thi…
For the first blank (What is the rate of the reverse reaction just after the \(C_{2}H_{5}CO_{2}CH_{3}\) has been removed from the flask): Greater than zero, but less than the rate…
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there are structural differences between \going for water\ and \kites.\…
"Going for Water": repetitive rhyme scheme, irregular meter, stanzas of varying length. "Kites": six stanzas, regular meter.
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select the correct answer. a company is launching a new product and wan…
D. Using targeted ads and influencer partnerships to increase brand visibility
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a grocery store buys organic apples for $0.75 per apple. the grocery st…
\(0.89\)
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what happens to most food molecules as they travel through mkennas dige…
they decrease and completely disappear.
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what did the dialysis lab demonstrate about the walls of the small inte…
There are gaps or holes that small molecules can leave through.
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what does a chemical indicator do? change temperature to show that cert…
Change color to show that certain substances are present.
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0. what is methane? provide its chemical formula and where it commonly …
Methane is a hydrocarbon. Its chemical formula is \(CH_4\). It commonly originates from natural gas deposits, decomposition in anaerobic environments (such as wetlands and landfil…
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oxalic acid (h₂c₂o₄) is a polyprotic acid. write balanced chemical equa…
$$H_{2}C_{2}O_{4}(aq)+H_{2}O(l) ightleftharpoons H_{3}O^{+}(aq)+HC_{2}O_{4}^{-}(aq)$$ $$HC_{2}O_{4}^{-}(aq)+H_{2}O(l) ightleftharpoons H_{3}O^{+}(aq)+C_{2}O_{4}^{2 -}(aq)$$
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put the steps of petroleum formation in their order of occurrence. firs…
1. Tiny marine organisms like algae and plankton died and sank to the ocean floor. 2. The remains of tiny marine organisms slowly decomposed into organic matter. 3. Organic matter…
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as more and more layers of sediment built up on the ocean floor and tur…
Over millions of years, intense heat beneath the ocean floor and pressure from overlying rocks and sediments transformed organic matter into petroleum.
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which of these is an agent of chemical weathering? (1 point) acid rain …
acid rain
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the ionic compound feco₃ is the primary component of the orange mineral…
Iron(II) carbonate
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which action describes chemical weathering? (1 point) water depositing …
water carving out a limestone cave
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the ionic compound pb(no₃)₂ is used in the manufacture of matches. what…
Lead(II) nitrate
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the ionic compound fepo₄ is used as a pesticide to kill slugs and snail…
Iron(III) phosphate
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how does water play a role in the chemical weathering of rock? match ea…
- Hydrolysis: Water molecules bond with minerals in rock, causing rock disintegration. - Carbonation: Carbon dioxide and rainwater form carbonic acid and dissolve minerals in rock…
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the ionic compound nh₄clo₄ was used as a rocket fuel to launch nasas or…
Ammonium perchlorate
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the ionic compound nh₄hco₃ can be added to cookie dough to help the coo…
ammonium bicarbonate
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what is the name of this ionic compound? pbso₄ refer to a periodic tabl…
lead(II) sulfate
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what is the name of this ionic compound? snc₂o₄ refer to a periodic tab…
tin(II) oxalate
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what is the name of this ionic compound? pbcro₄ refer to a periodic tab…
lead(II) chromate
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what is the name of this ionic compound? cr(no₃)₃ refer to a periodic t…
chromium(III) nitrate
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what is the name of this ionic compound? khso₄ refer to a periodic tabl…
potassium hydrogen sulfate
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what is the name of this ionic compound? ba(bro₃)₂ refer to a periodic …
barium bromate
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what is the name of this ionic compound? ca(no₂)₂ refer to a periodic t…
calcium nitrite
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what is the name of this ionic compound? nh₄i refer to a periodic table…
ammonium iodide
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convert -51.7°c to degrees fahrenheit. round your answer to the correct…
$-61.1$
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the passage below describes an experiment. grace set 15 drinking glasse…
When sugar is added to water, does the water’s temperature affect the amount of time it takes the sugar to dissolve?
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the passage below describes an experiment. bradley filled 12 identical …
Does the amount of Epsom salt dissolved in water affect the thickness of the bubble layer when soap is added?
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the passage below describes an experiment. rock candy is a treat made b…
Does rock candy grow larger when it is made with white sugar or brown sugar?
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the passage below describes an experiment. ten groups of chemistry stud…
Does the color change faster when the solutions are mixed at 25°C or 50°C?
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using the graph, explain how activation energy works. how is it similar…
Activation energy is the energy barrier reactants must overcome. Striking a match provides initial energy (like activation energy). For energy comparison: exothermic - products ha…
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potassium cyanide is used to isolate gold from finely ground ore. write…
\(KCN\)
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aluminum phosphide is used as a pesticide to protect grains from being …
\(AlP\)
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nov. 10 bell ringer a chemical compound in your toothpaste helps protec…
The elements in the compound \(Na_2PO_3F\) are Sodium (\(Na\)), Phosphorus (\(P\)), Oxygen (\(O\)), and Fluorine (\(F\)).
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complete the rhyme scheme. a a a b b by the trembling ladder, steep and…
A, A, A, B, B
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complete the rhyme scheme. a b b c c \who planted this old apple tree?\…
A, B, B, C, C
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1. which sector of the economy consumes the most energy? a transportati…
1. B. industry 2. C. chemical 3. C. radiant 4. C. electricity 5. C. coal
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adapted from robert browning, \the pied piper of hamelin\ all the littl…
A. A A. A A. A B. B B. B
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complete the rhyme scheme. a a b b when you and i were young, we knew t…
A, B, B, A
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complete the rhyme scheme. id never take a look at a lesson or a book a…
A. I'd never take a look, A. At a lesson or a book, B. And I'd scold like a pirate on the sea, B. If I only had to do what I like to do, C. And didn't always have to be me!
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complete the rhyme scheme. a a b b c he wriggled and giggled, and then …
A, A, B, B, C
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19. although amino acids have \acid\ in their name, some are acidic in …
Amino acids contain both acidic (\(-COOH\)) and basic (\(-NH_2\)) groups. Neutral amino acids have a balance of these groups. Acidic amino acids have an extra \(-COOH\) group, and…
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complete the rhyme scheme. a a b b c he wriggled and giggled, and then …
A, A, B, B, B
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14. draw the lewis structure of the 3 - atom functional group containin…
The Lewis structure of the amine group (-NH₂) is: $$\text{H}-\text{N}-\text{H}$$ with two lone pairs on the nitrogen atom (represented as two dots on the nitrogen).
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14. draw the lewis structure of the 3 - atom functional group containin…
$$\text{H}-\text{N}-\text{H}$$ with a lone pair on the nitrogen atom.
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multiple choice question what is the term for chemical reactions that r…
exothermic reactions
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select the correct answer. use the solubility rules and the periodic ta…
E. $BaSO_{4}$
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select the correct answer. which element or compound has lost electrons…
C. Li
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select all the correct answers. in this reaction, how does the rate of …
C. It increases with a decrease in the concentration of \(H_2(g)\). D. It decreases with an increase in the concentration of \(S_2(g)\). E. It decreases with increase in the conce…
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select the correct answer. a substance is followed by the symbol (i) in…
B. The substance is in the liquid state.
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multiple select question select all that apply which statement(s) about…
- In endothermic reactions, thermal energy is absorbed. - Endothermic and exothermic changes can be chemical or physical.
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which of the following could form an ionic compound? check all that app…
\(Cl^-\) and \(K^+\), \(Na^+\) and \(F^-\)
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here are sketches of four electron orbitals: are any of them s orbitals…
- Are any of them s orbitals? yes - List the s orbitals, if any: A - Are any of them p orbitals? yes - List the p orbitals, if any: B
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complete the rhyme scheme. a a b b a i visited the place where we last …
A, B, A, B, A
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complete the rhyme scheme. a b b a a i try to catch at many a tune like…
A. A B. B C. B D. A E. A
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26 sep use models other than the names of the ions, how does the name o…
CaS is named calcium sulfide (the metal part has a fixed charge and no Roman numeral is needed). CdS is named cadmium(II) sulfide (the transition metal part has a variable charge …
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the diagrams below show two pure samples of gas in identical closed, ri…
Neither, the samples have the same temperature.
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why does the stratosphere warm up as you go through it? a higher presen…
absorption of ultraviolet radiation by ozone
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specific mass conversions quick check hydrogen and oxygen react to prod…
4
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list five pieces of information that can be listed in a square of an el…
Atomic number, element symbol, element name, atomic mass, group number (or period number).
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specific mass conversions quick check use this chemical equation to ans…
\(32\space g/mol\)
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specific mass conversions quick check nitrogen gas and hydrogen gas rea…
56
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specific mass conversions quick check nitrogen gas and hydrogen gas rea…
For every 3 moles of hydrogen gas, the reaction produces 2 moles of ammonia.
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specific mass conversions quick check how does stoichiometry support th…
It compares the mass of the products to the mass of the reactants.
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2. when atoms react, they often lose, gain, or share electrons to form …
Group 18 (Noble Gases)
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what term is used to describe chemicals that are human - made and contr…
anthropogenic chemicals
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determine if the listed pairs of elements have similar or different pro…
7. a. Potassium & Rubidium, b. Calcium & Barium, d. Helium & Krypton have similar properties; c. Sodium & Chlorine, e. Phosphorus & Oxygen, f. Lithium & Fluorine have different pr…
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what is the chemical formula of ozone? h₂o o₃
\(O_3\)
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2 low ionization energy is a characteristic of a 3 what does atomic rad…
- **2**: Low ionization energy is a characteristic of a metal. - **3**: Atomic radius is the distance from the nucleus of an atom to its outermost electron shell. - **4**: Across …
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using the periodic table and your knowledge of periodic trends, answer …
a. F (smallest electron - affinity among the non - metals shown, as it has a high tendency to gain an electron and is in the upper right of the non - metals in the table). f. Cs (…
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which of the following ph values represents the greatest concentration …
The pH value of \(1\) represents the greatest concentration of \(H^+\) ions.
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in which mixture can you see all of the parts? homogeneous heterogeneous
heterogeneous
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in an endothermic reaction, heat is... taken in given out
taken in
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which state of matter is represented in the following diagram?
Liquid
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33 write the formula for carbon tetrachloride. notebook b / u enter not…
\(CCl_{4}\)
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32 name the compound p₄s₃.
Tetraphosphorus trisulfide
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use the periodic table and your knowledge of properties and periodic tr…
a) Ionization energy is the energy required to remove an electron from a gaseous atom or ion. b) Ionization energy generally decreases as you move down a group (column). c) Ioniza…
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in the following text, which form of warfare from world war i is truffa…
First question: chemical warfare Second question: an alliance between Germany and Mexico
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ccc patterns there are many compounds composed of nitrogen and oxygen. …
- Nitrogen monoxide formula: \(NO\) - Nitrogen dioxide formula: \(NO_{2}\)
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sep use models chlorine and oxygen form many different compounds, inclu…
The names use prefixes to show the number of each type of atom. \(ClO_2\) is chlorine dioxide (implied one chlorine, two oxygens) and \(Cl_2O_3\) is dichlorine trioxide (two chlor…
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29 what is the name of (nh₄)₂s?
Ammonium sulfide
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28 what is the chemical formula for copper(ll) nitrate? notebook b / u …
\(Cu(NO_3)_2\)
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27 sep construct an explanation explain whether the formula cuo can be …
No, the formula \(CuO\) cannot be used to represent both copper(I) oxide and copper(II) oxide. Copper(I) oxide has the formula \(Cu_{2}O\) (because \(Cu^{+}\) and \(O^{2 -}\) ions…
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25 ccc patterns how are the chlorate and chlorite ions different from e…
- **Difference**: Chlorate (\(ClO_{3}^{-}\)) has one more oxygen atom than chlorite (\(ClO_{2}^{-}\)). - **Similarity**: Similar to sulfate (\(SO_{4}^{2 - }\)) - sulfite (\(SO_{3}…
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prefixes and suffixes are important in science to help understand the m…
B. round, 3 - dimensional object
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what is the electron - domain geometry of the structure below? linear t…
Trigonal planar
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what is the electron - domain geometry of the structure below? octahedr…
Octahedral
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what is the electron - domain geometry of icl₃? linear tetrahedral trig…
Trigonal bipyramidal
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what is the electron - domain geometry of sef₄? tetrahedral trigonal bi…
Trigonal bipyramidal
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how many lone pair(s) of electrons are around se in sef4?
\(1\)
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how many electron domains are around iodine in $if_{3}$? hint: what rep…
5
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what is the molecular geometry of icl₃? trigonal bipyramidal linear t -…
T - shaped
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what is the molecular geometry of sef4? octahedral square planar linear…
Seesaw