Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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unit exam - matter and change compare the total mass of the reactants t…
C. $78\ \text{g K} + 71\ \text{g Cl}_2 ightarrow 149\ \text{g KCl}$
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which statement best describes how electrons fill orbitals in the perio…
Electrons fill orbitals in order of their increasing energy from left to right.
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unit exam - matter and change which of these changes is an example of a…
polishing a gemstone
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which of these changes is an example of a chemical change? broken glass…
cooking an egg
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in which orbitals would the valence electrons for selenium (se) be plac…
s orbital and p orbital
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unit exam - matter and change menthol section 2: health hazards liquid …
toxic if used with personal protective equipment
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a single atom of an element has 11 protons, 11 electrons, and 12 neutro…
B. Na
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which of these is an example of a physical property? sodium oxidizes in…
Table salt is a white crystal.
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iron, an element with the chemical symbol fe, is an important element. …
with a high probability of containing the electron) around the nucleus. The other statements are consistent with both Dalton's theory and modern atomic theory: Dalton proposed ele…
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to show the electron configuration for an atom, when would it be better…
electrons in subshells. Orbital notation (e.g., box diagrams) explicitly represents individual orbitals and can show the spin state of each electron using arrows, which written co…
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which physical method can be used for obtaining a sample of salt from a…
ing is for separating solid mixtures, not dissolved solids from liquids.
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which pure substance can be classified as an element? $ce{h_{2}}$ $ce{n…
atoms, so it is an element. - $\text{NO}_3$: Contains nitrogen + oxygen, compound. - $\text{NaCl}$: Contains sodium + chlorine, compound. - $\text{H}_2\text{SO}_4$: Contains hydro…
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which of the following symbols would be included in the noble gas notat…
number 36, which ends the 4th period). Kr's electron configuration is $[Ar] 3d^{10} 4s^2 4p^6$, so elements with 5s valence electrons use Kr as the noble gas core.
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select the correct answer which of these periods contain elements with …
D. periods 6-7
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select the correct answer which of these elements has four total electr…
D. sulfur (S)
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3 select the correct answer which of these elements is an alkaline eart…
B. calcium (Ca)
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select the correct answer how does the modern periodic table arrange el…
B. by atomic number
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1 select the correct answer. which of the following elements is an alka…
A. potassium (K)
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(16) (geographers, mineralogists, zoologists, astronomers) have identif…
16. Mineralogists 17. rock-forming 18. deposits 19. organic 20. coal 21. Anthracite 22. Coke 23. luster 24. Malleability; Ductility 25. iron 26. ores 27. veins 28. Mining 29. loca…
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2. write pe next to the types of potential energy and ke next to the ty…
PE gravitational KE sound PE chemical PE nuclear KE radiant KE thermal PE elastic KE electrical
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 the…
6) that is less than 50. Noble-gas notation uses the preceding noble gas to represent core electrons, so tin's noble-gas notation starts with [Kr].
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 in whi…
orbitals belong to the f block of the periodic table, which includes the actinide series where uranium is classified.
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 tim…
als to complicate configurations). Later p-block elements have filled inner d/f orbitals, making electron configuration determination more complex. The other options are incorrect…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 how…
A. 1
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(2½ points each) ask jesus to help you as you take your test. do your b…
## Matching Answers: 1. (C) color 2. (I) streak 3. (F) hardness 4. (H) specific gravity 5. (G) luster 6. (A) acid test 7. (D) crystal structure 8. (B) cleavage 9. (E) Geiger count…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 which …
noble gas with the highest atomic number less than 17, with 10 electrons. ## Step3: Calculate remaining electrons $17 - 10 = 7$ electrons left to assign. ## Step4: Fill valence or…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 whi…
2. ## Step2: Find nearest noble gas core Radon (Rn, atomic number 86) is the preceding noble gas, so we use [Rn] as the core. ## Step3: Calculate remaining electrons $102 - 86 = 1…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 1 whic…
, 2s holds 2, leaving 4 electrons for the 2p orbital, resulting in the configuration $1s^2 2s^2 2p^4$.
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 the…
by Aufbau principle Fill 1s first (holds 2 electrons): $1s^2$ (2 electrons used, 5 left) Fill 2s next (holds 2 electrons): $2s^2$ (4 electrons used, 3 left) Fill 2p (holds 6 elect…
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 wha…
2
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electrons and the periodic table quiz complete 1 2 3 4 5 6 7 8 9 10 tim…
$$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^3$$ ## Step3: Analyze orbital filling - 4s: $4s^2$ (full, holds max 2) - 3d: $3d^{10}$ (full, holds max 10) - 4p: $4p^3$ (partial, holds…
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2 \text{F}_2(\text{g}) + \text{O}_2(\text{g}) \to 2 \text{OF}_2(\text{g})$
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i see you shining like a jewel of night, you, possibility maker, dream-…
B. abba acca
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what type of chemical reaction is shown: $2\\ n_2 + o_2 \ ightarrow 2\\…
Synthesis
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what type of chemical reaction is shown: $2\\ al + cr_2o_3 \ ightarrow …
B. Single Replacement
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what type of chemical reaction is shown:$ce{h_{2}so_{4} + 2 nacn -> 2 h…
Double Replacement
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which is a reactant in the chemical reaction shown: $ce{h_{2}so_{4}} + …
A. $\text{H}_2\text{SO}_4$, C. $\text{NaCN}$
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how many atoms of chlorine are in 5 cucl₂? 2 10 5 1
10
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what type of chemical reaction is shown: $ce{h_{2} + cl_{2} -> 2 hcl}$ …
Synthesis
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what type of chemical reaction is shown: $ce{h_{2}so_{4} + 2 nacn -> 2 …
Double Replacement
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how many molecules are in 8 naoh? 4 1 8 2
8
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how many molecules are in 6 cacl₂? 6 4 12 1
6
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which is a product in the chemical reaction shown: $2\\ n_2 + o_2 \ igh…
$\text{N}_2\text{O}$
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unit review - matter and change skip a 150 g sample is composed of 90 g…
40%
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uestions.ifferent amounts of saltder to measure the effectup of positiv…
D. to determine the effect of salt on water's boiling point
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unit review - matter and change skip a 250 g sample is composed of 131 …
52.4% (corresponding to the option: 52.4%)
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how many atoms of hydrogen are in $4\\ \\text{ca(oh)}_2$? 1 8 2 4
B. 8
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unit review - matter and change skip how is this substance classified? …
a. a compound
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unit review - matter and change skip identify the following as an eleme…
element
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what type of chemical reaction is shown: $3\\text{fe} + 4\\text{h}_2\\t…
Single Replacement
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what separation technique is illustrated in the picture?evaporationdist…
evaporation
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what type of chemical reaction is shown: $ce{pcl_{5} -> pcl_{3} + cl_{2…
Decompostion
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unit review - matter and change skip what method would separate a mixtu…
Use a magnet to attract the iron.
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unit review - matter and change skip distillation of cherry-vanilla col…
the sugar remaining in the flask
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skip based on the order the substances come out of the distillation, wh…
the cherry ester
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unit review - matter and change skip classify the following as a hetero…
heterogeneous mixture (suspension)
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unit review - matter and change which sample represents a suspension? t…
sample 3
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un neutral as el átomo tiene electrón(es) de valencia
5
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unit review - matter and change skip compare the total mass of the reac…
C. $58\ \text{g Mg(OH)}_2 ightarrow 40\ \text{g MgO} + 18\ \text{g H}_2\text{O}$
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un neutral rn el átomo tiene ____ electrón(es) de valencia. mostrar tab…
8
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unit review - matter and change compare the total mass of the reactants…
161 g ZnSO₄ → 81 g ZnO + 80 g SO₃
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unit review - matter and change skip which of these changes is an examp…
burning jet fuel
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unit review - matter and change skip what state of matter is the materi…
Gas
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unit review - matter and change skip which state of matter takes the sh…
liquid
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unit review - matter and change skip section 3 composition, information…
D. Glycerol
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nit review - matter and change skip consider the fire fighting measures…
A. The sodium will react with the water, causing a flash fire.
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unit review - matter and change which of these is an example of an exte…
Volume
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unit review - matter and change skip which of these is an example of a …
A piece of coal burns.
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mechanical separation which technique would you use if you wanted to se…
filtration
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feb 10 mechanical separation which of these separation techniques is be…
filtration
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mechanical separation what separation technique is illustrated in the p…
filtration
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mechanical separation what technique would you use if you wanted to sep…
magnetism
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mixtures classify the following as a heterogeneous mixture (suspension)…
homogeneous mixture (solution)
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mixtures classify the following as a heterogeneous mixture (suspension)…
heterogeneous mixture (suspension)
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mixtures classify the following as a heterogeneous mixture (suspension)…
heterogeneous mixture (suspension)
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mixtures classify the following as a heterogeneous mixture (suspension)…
heterogeneous mixture (suspension)
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mixtures what term describes two or more substances that are physically…
mixture
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oxygen is acting as an oxidizing agent in all of the following reaction…
# Explanation: ## Step1: Define oxidizing agent An oxidizing agent is a substance that gets reduced (its oxidation number decreases[LLM SSE On Failure]
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2\ \text{F}_2(\text{g}) + \text{O}_2(\text{g}) \to 2\ \text{OF}_2(\text{g})$
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conservation of mass compare the total mass of the reactants to the tot…
A. $18\ \text{g C} + 48\ \text{g O}_2 ightarrow 66\ \text{g CO}_2$
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2 \text{F}_2(\text{g}) + \text{O}_2(\text{g}) ightarrow 2 \text{OF}_2(\text{g})$
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the energy released during nuclear fission is primarily in the form of …
Thermal
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2\ \text{F}_2(\text{g}) + \text{O}_2(\text{g}) \to 2\ \text{OF}_2(\text{g})$
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un neutral cl el átomo tiene ____ electrón(es) de valencia. mostrar tab…
7
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compare the total mass of the reactants to the total mass of the produc…
D. $60\ \text{g}\ \text{C}_5\text{H}_{12} + 224\ \text{g}\ \text{O}_2 ightarrow 176\ \text{g}\ \text{CO}_2 + 108\ \text{g}\ \text{H}_2\text{O}$
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date ______ pd ______ balancing chemical reactions- worksheet 2 balance…
1. $2\ce{SO2 + 1O2 -> 2SO3}$ 2. $2\ce{CH4 + 3O2 -> 2CO + 4H2O}$ 3. $2\ce{P + 3Cl2 -> 2PCl3}$ 4. $2\ce{CO + 1O2 -> 2CO2}$ 5. $2\ce{CH4 + 1O2 -> 2CH3OH}$ 6. $2\ce{Li + 1Br2 -> 2LiBr…
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based on the law of conservation of mass, what mass of products form wh…
25.00 g
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un neutralsiel átomo tiene electrórn(es) de valencia. mostrar tabla per…
4
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conservation of mass based on the law of conservation of mass, what mas…
34.61 g
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $2\ F_2(g) + O_2(g) ightarrow 2\ OF_2(g)$
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oxygen is acting as an oxidizing agent in all of the following reaction…
C. $\ce{2 F2(g) + O2(g) -> 2 OF2(g)}$
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9 fill in the blank 1 point balance the following equation by filling i…
6
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atomic numbers and electron configurations quiz complete 1 2 3 4 5 6 7 …
1s²2s¹
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atomic numbers and electron configurations quiz complete 1 2 3 4 5 6 7 …
that drive reactivity. While Model 1 includes the 4s¹ electron, its condensed notation is less intuitive for visualizing the outermost shell's role in reactivity compared to the s…
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atomic numbers and electron configurations quiz complete 1 2 3 4 5 6 7 …
opposite spins are shown by one upward-pointing arrow and one downward-pointing arrow in the same orbital, which matches the second option. The other options show either parallel …
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atomic numbers and electron configurations quiz complete 1 2 3 4 5 6 7 …
al (angular momentum) quantum number, orbital orientation by the magnetic quantum number, and orbital mass is not a characteristic defined by quantum numbers.
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(04.04 lc) which narrative technique did modernist writers experiment w…
Stream of consciousness
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name: zocl1. assign oxidation numbers to each atom in the following com…
### Part 1: Oxidation Numbers a. +1, -1 b. 0 c. +1, -2 d. +3, -1 e. +4, -2 f. +1, -1 g. +1, +4, -2 h. +3, -2 i. +6, -2 j. +3, -2 k. +5, -2 ### Part 2: Binary Compound Names a. Tet…
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chemical reaction --a reaction that cannot be undone and makes a new ty…
Step 3
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part b read each scenario. decide whether a physical or chemical change…
1. F 2. F 3. T