Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
-
21. complete the following chart. | | k | mg | na | n | cl | si | |--|-…
The completed table is shown above.
-
true or false: in a balanced chemical equation, the number of atoms of …
1. True 2. Carbon + Oxygen → Carbon Dioxide 3. A + BC → AC + B
-
the main, or central, idea of the passage is isatou ceesay started a re…
It establishes the significance of the lack of waste collection.
-
read the passage. pocketbooks from trash excess garbage is a long - sta…
Isatou Ceesay started a recycling program in order to clean up the trash in her Gambian village.
-
true or false: a synthesis reaction involves breaking down a compound i…
False 10 grams Synthesis
-
the amount of valence electrons tell you what about the element?
The chemical reactivity, bonding ability, and group position in the periodic table.
-
what did we learn about cigarette filters that were marketed as creatin…
No cigarette, filtered or unfiltered, is truly safe
-
what happens when a chemical reaction takes place? things stay exactly …
1. New things with different properties are made. 2. Decomposition 3. $2KClO_3 ightarrow2KCl + 3O_2$
-
chemistry_quiz 2 locked mode is on. to avoid losing your progress, comp…
A. 4
-
_____ is an example of a polar bond and _____ is an example of a non - …
1. A. C - O; P - P 2. A. C - O; P - P 3. C. 9 4. D. Will a bird's brain size shrink if it flies long distances?
-
chemistry_quiz 2 locked mode is on. to avoid losing your progress, comp…
0.75
-
what element is shown in the electron configuration below? 1s²2s²2p⁶3s²…
Rubidium
-
in a single displacement reaction, what is always one of the products? …
1. C. A different element by itself 2. Hydrogen + Oxygen → Water
-
match the noble - gas notations with their correct elements. kr5s²4d¹⁰5…
$[Kr]5s^{2}4d^{10}5p^{3}$ - Antimony $[Xe]6s^{2}4f^{14}5d^{6}$ - Osmium $[Rn]7s^{2}5f^{11}$ - Einsteinium $[Kr]5s^{2}4d^{10}5p^{5}$ - Iodine
-
match the elements with their correct noble gas notation configurations…
Chlorine - $[Ne]3s^{2}3p^{5}$ Radium - $[Rn]7s^{2}$ Arsenic - $[Ar]4s^{2}3d^{10}4p^{3}$ Fluorine - $[He]2s^{2}2p^{5}$
-
you mix silver nitrate (agno₃) and sodium chloride (nacl) in water. two…
1. Double displacement 2. Combustion 3. A different element by itself
-
chemistry_quiz 2 locked mode is on. to avoid losing your progress, comp…
There is no correct option provided in the given choices. The correct length in kilometers is 0.105.
-
describe how plant acids contribute to the weathering of rocks and prov…
Plant roots secrete organic acids that chemically react with rock - forming minerals, causing weathering. An example could be roots of trees in rock cracks secreting acids that br…
-
electron configuration and noble gas notation match the elements below …
bromine - $4p^{5}$ strontium - $5s^{2}$ lanthanum - $4f^{1}$
-
chemistry_quiz 2 locked mode is on. to avoid losing your progress, comp…
C. they are equal
-
what element has the following electron configuration? 1s²2s²2p⁶3s²3p⁶4…
C. iron
-
what contributes to the high level of biodiversity found in wetlands? a…
d. all of the above
-
what element has the following electron configuration? 1s²2s²2p⁶3s¹ o p…
sodium
-
what element is shown below in the orbital diagram given? 1s 2s 2p fluo…
oxygen
-
electron configuration and noble gas notation the orbital diagram below…
phosphorus
-
your younger cousin mary is a rising senior in high school this year an…
Dear Mary, First, a college degree in chemical engineering is definitely worth it. It will likely lead to higher - paying and more fulfilling jobs compared to starting with just a…
-
what element is the orbital diagram showing? 1s 2s 2p ground state oxyg…
C. nitrogen
-
in the chemical equation 2mg + o₂ → 2mgo, identify the reactant(s). mg …
1. D. Mg and O2 2. B. Yes, because magnesium is higher on the list.
-
electron configuration and noble gas notation what is the correct elect…
1s²2s²2p⁶3s²3p⁵
-
atch the correct sublevels (s, p, d, and f) with the number of electron…
s - 2 electrons p - 6 electrons d - 10 electrons f - 14 electrons
-
name: sidney date: sept 24th period: 2nd carbon cycle webquest https://…
1. Biogeochemical cycle 2. Carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur 3. Carbon comes from the atmosphere (as carbon dioxide), and after leaving plankton, it can be pa…
-
what is the smallest particle of the element gold (au) that can still b…
A. Atom
-
balance this equation: mg + hcl → mgcl₂ + h₂ mg + 2hcl → mgcl₂ + h₂ 2mg…
1. Mg + 2HCl → MgCl₂ + H₂ 2. The copper is being replaced by the zinc. 3. No, because there are more oxygen atoms on the left.
-
which element has the most protons? a potassium (k) b sodium (na) c hyd…
A. Potassium (K)
-
what is the purpose of calculating the theoretical yield in a chemical …
A. To predict the maximum amount of product that can be obtained
-
calculator sodium-24 has a half - life of 15 hours. how many grams of a…
14.0625 g
-
which of the following best describes the theoretical yield in a chemic…
B. The calculated amount of product based on stoichiometry
-
11 as you move from left to right across the periodic table, what happe…
B. become less metallic
-
in a chemical reaction, if the actual yield is 75 grams and the theoret…
A. 93.75%
-
in a chemical reaction, the actual yield is 90 grams, and the theoretic…
d. 90%
-
how is molar mass defined? a. the weight of a single atom b. the energy…
C. The mass of one mole of a substance, expressed in grams per mole
-
10 which two elements on the periodic table are in the same period ? a …
C. Sn and Rb
-
9 what does the atomic number in the periodic table represents? a atomi…
D. Number of protons
-
8 how many protons, neutrons, and electrons does xenon have? a 54 proto…
D. 54 protons, 77 neutrons, and 54 electrons
-
7 how many electrons can the second energy level hold? a 2 b 18 c 8 d 32
C. 8
-
when two elements bond and form a compound, what happens to their proto…
The protons remain the same in the nucleus of each atom.
-
how many total atoms are in a carbon dioxide molecule? hint: the sphere…
3
-
6 which three statements describe the color - coded areas of the period…
B. The medium color - coded elements are non - metals. D. The lightest color - coded elements are metals. E. The darkest color - coded elements are non - metals.
-
how many carbon atoms are in a carbon monoxide molecule? hint: in the m…
1
-
which of these is the atomic mass of argon (ar)? ar 18 39.948
39.948
-
sonnet 2 by gwendolyn bennett some things are very dear to me— such thi…
1. Underline and bold comparison word clues: Identify and mark words like "such as", "like". 2. Highlight the rhyme scheme using color - coding: Analyze and color - code end - sou…
-
which of these is the atomic number of silver (ag)? 47 107.868 ag
47
-
which element has 33 protons in its nucleus? phosphorus selenium arsenic
C. Arsenic
-
according to the bohr model, how many total electrons does sodium have?…
B. 11
-
which of these elements has the largest number of protons? technetium t…
Rhenium
-
a covalent bond is formed by the sharing of _______, whereas an ionic b…
1. electrons; transfer of electrons from one atom to another 2. unsaturated fatty acid 3. It contains two hydrocarbon chains bound to glycerol by ester bonds. 4. non - polar (miss…
-
which part of an atom is found outside the nucleus? neutrons protons el…
Electrons
-
according to the bohr model above, how many valence electrons does sodi…
C. 1
-
what is the very smallest piece of silver possible? a silver atom a sil…
a silver atom
-
what is the very smallest piece of silver possible? a silver atom a sil…
A. a silver atom
-
which statement best describes the electrons in a bohr model? a electro…
B. Electrons orbit around the nucleus in energy levels.
-
what type of atom makes up the element tin (sn)? nitrogen atoms argon a…
Tin atoms
-
using the model and a periodic table, answer the following questions. b…
A. Phosphorus
-
how does chromatography separate pigments? by solubility by ph level by…
by solubility
-
which element shares similar properties with calcium (ca)? scandium (sc…
B. Strontium (Sr)
-
3. use the periodic table to locate the eight elements in this activity…
| | H | Ca | Ne | Na | Li | Mg | He | Fe | |--|--|--|--|--|--|--|--|--| | Atomic mass | 1 u | 40.08 u | 20.18 u | 22.99 u | 6.94 u | 24.31 u | 4.00 u | 55.85 u | For question 4: L…
-
using the model and a periodic table, answer the following questions. b…
C. 3
-
chemistry part 1 - lesson 21 assessment - edcp800 question what does th…
the electron sublevel
-
all electrons of a given atom have the same four quantum numbers. true …
False
-
freshflow produces organic juice bottles. the company has gathered data…
between $q = 0$ and $q = 25$
-
a local farmers market introduces a new line of organic vegetables that…
The price ceiling will have no effect on the market.
-
aldehydes and ketones are very similar in that they both contain phosph…
1. C. a carbonyl group 2. D. soluble in water 3. B. simple sugar (monosaccharide) 4. B. oxygen is more electronegative than hydrogen.
-
which is the first occupied sublevel? o subshell p o subshell f o subsh…
subshell s
-
what is the maximum number of electrons that can be held in a d subleve…
C. 10
-
part b criteria are the specific goals of the design. list at least two…
1. The cup should be able to efficiently transfer heat to support the endothermic reaction. 2. The material of the cup should be thermally stable and not react with the substances…
-
what does the quantum number (m_{l}) indicate? ( \bigcirc) the overall …
the location of an electron within the sublevel
-
poster draw a poster that illustrates how evidence of chemical reaction…
A poster with visual examples of chemical - reaction evidence (color change, gas evolution, precipitate formation, temperature change) and simple chemical equations.
-
catalysts are not in the reaction, allowing them to be reused.
consumed
-
in a chemical reaction, catalysts act as molecular, guiding the reactan…
guides
-
draw two fully worked - out ideas for the cup. include exact dimensions…
Idea 1: Drink compartment is a cylinder with $r\approx4.37$ $cm$ and $h = 10$ $cm$, cold - pack is a cube with side length $\approx5.31$ $cm$ placed beside the cylinder. Idea 2: D…
-
complete the following table: some polyatomic ions name chemical formul…
| name | chemical formula | |--|--| | hydronium cation | $H_3O^+$ | | phosphate anion | $PO_{4}^{3 - }$ | | carbonate anion | $CO_{3}^{2 - }$ | | cyanide anion | $CN^-$ |
-
complete the following table: some polyatomic ions name chemical formul…
| name | chemical formula | |--|--| | phosphate ion | $PO_{4}^{3 - }$ | | nitrate ion | $NO_{3}^{-}$ | | cyanide ion | $CN^{-}$ | | hydronium ion | $H_{3}O^{+}$ |
-
complete the following table: some polyatomic ions name chemical formul…
Carbonate
-
question 1(multiple choice worth 2 points) oss_01the first three steps …
The contracting nebula flattens into a disk with a bulge at the center.
-
complete the following table: some polyatomic ions name chemical formul…
| name | chemical formula | |--|--| | carbon | $CO_3^{2 - }$ | | phosphate | $PO_4^{3 - }$ | | hydronium cation | $H_3O^+$ | | hydroxide | $OH^-$ |
-
write the chemical formula for this molecule:
$SeOCl_2$
-
course activity: building a device that uses energy from chemical reac …
The cup will be used for holding a drink and keeping it at a certain temperature (using the cold - pack compartment).
-
part e could this chemical reaction be used for a cold pack? justify yo…
It depends on whether the chemical reaction is endothermic or exothermic. If endothermic, yes; if exothermic, no.
-
decide whether each pair of elements in the table below will form an io…
| element #1 | element #2 | Forms ionic compound? | empirical formula of ionic compound | name of ionic compound | | ---- | ---- | ---- | ---- | ---- | | sulfur | strontium | yes …
-
nicole and chanice are building scale models of molecules for chemistry…
Determine Nicole's unit rate: 1.3889 models per 1 hour Specify Nicole's rate: \(\frac{6}{5}\) models per hour Determine Chanice's unit rate: \(\frac{4}{3}\) models per 1 hour Spec…
-
part d did the chemical reaction absorb or release energy? how do you k…
If the temperature of the surroundings decreases during the chemical reaction, it absorbs energy (endothermic). If the temperature of the surroundings increases, it releases energ…
-
example 2: sodium (na) electron configuration: noble gas configuration …
Electron Configuration: $1s^{2}2s^{2}2p^{6}3s^{1}$ Noble Gas Configuration (abbreviated): $[Ne]3s^{1}$
-
select all that apply which are functions of astrocytes? form blood - b…
- Form blood - brain barrier - Convert blood glucose to lactate for neurons to use for fuel - Regulate chemical composition of tissue fluid
-
part b add 2 teaspoons of baking soda and 2 teaspoons of citric acid to…
Yes, a chemical reaction is taking place. We know this because when baking soda and citric acid are mixed in water, effervescence (bubbling) occurs, which is a sign that a new sub…
-
decide whether each pair of elements in the table below will form an io…
| element #1 | element #2 | Forms ionic compound? | empirical formula of ionic compound | | ---- | ---- | ---- | ---- | | barium | bromine | yes | $BaBr_{2}$ | | sulfur | fluorine…
-
complete this table. | name | empirical formula | |--|--| | magnesium b…
| name | empirical formula | |--|--| | magnesium bromide | $MgBr_{2}$ | | lithium fluoride | $LiF$ |
-
nicole and chanice build scale models of molecules for chemistry class.…
Nicole's unit rate: 1 hour, \( \frac{6}{5} \) models Specify Nicole's rate: \( \frac{6}{5} \) models per hour Chance's unit rate: 1 hour, \( \frac{4}{3} \) models Specify Chance's…
-
what makes good people do bad things? melissa dittmann • 2004 font size…
A. social situations
-
phosphorus (p) electron configuration: ____________ noble gas configura…
Phosphorus: Electron Configuration: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$ Noble Gas Configuration (abbreviated): $[Ne]3s^{2}3p^{3}$ Fluorine: Electron Configuration: $1s^{2}2s^{2}2p^{5…
-
electron configuration & orbital practice electron configurations in th…
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$