Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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when working with a dangerous chemical, what simple procedure should yo…
For the first question: Make sure someone else knows you are using it and is present, possibly having the MSDS sheets out and available. For the second question: False.
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given 3h₂ + n₂ → 2nh₃ if 2.0 mol of h₂ are consumed, how many mol of nh…
\(1.3\space mol\)
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hanging together: building molecules atoms come together to make extend…
1) | Element Name | Element Symbol | How Many? | |--|--|--| | Hydrogen | H | 1 | | Chlorine | Cl | 1 | Molecular Formula: HCl 2) | Element Name | Element Symbol | How Many? | |--|…
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a compound is found to be 25.53% mg and 74.47% cl by mass. its molar ma…
The molecular formula is \(MgCl_{2}\)
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in the spring - ball system, what happens to the kinetic energy as the …
It is converted into elastic potential energy.
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in a pendulum system, what happens to the potential energy at the highe…
It is at its maximum.
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3. name the type of reaction (synthesis, decomposition, single displace…
- 3a) Double displacement - 3b) Combustion - 3c) Synthesis - 3d) Single displacement - 3e) Decomposition - 4a) Base - 4b) Acid - 4c) Acid
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suppose lashonda wants to find out about hydrogen sulfide. she would fi…
B. in a guide to the most common gases
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in $sp^{2}$-hybridized orbitals, how many $p$-orbitals remain to form m…
1
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3. name the type of reaction (synthesis, decomposition, single displace…
a) \(24.3\) g b) \(40.3\) g
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3. name the type of reaction (synthesis, decomposition, single displace…
a) \(24.3\) g b) \(40.3\) g
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in the earth - ball system, what happens to the potential energy of the…
It is converted into kinetic energy.
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which type of energy is associated with an objects motion? thermal ener…
3. Kinetic energy
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iclicker question consider a solution containing 0.50 mol of co₃²⁻. det…
A. 10.51
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reactants products h 4 h 4 o 2 o 2 __h₂ + __o₂ → __h₂o 2 reactants prod…
1. \(4H_2+2O_2 = 4H_2O\) 2. \(P_4+3O_2 = 2P_2O_3\)
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apply medical terminology for each specialty 5 of 5 how many molecules …
4
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name: date: class period: u6d3 - 4 test review: chemical bonding part i…
a) Structural formula: \(Cl - Sb - Cl\) with \(F\) attached to \(Sb\) (and lone pairs on \(Sb\)), Geometry name: T - shaped b) Structural formula: \(H - S - H\) (with lone pairs o…
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according to the text, what is one reason some archaeologists are inter…
B. They believe the scents could illuminate important aspects of ancient life.
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which of the following is not a factor in the ideal gas law? amount of …
Type of container.
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what does the root element in the term ischemia mean? to move forward t…
to keep back
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if the pressure exerted by a gas at 25 degrees c in a volume of 0.044 l…
\(0.0069\ mol\)
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what is the pressure exerted by 5.00 moles of nitrogen gas contained in…
\(4.08atm\)
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how many moles of propane gas are in a 7.0 l tank at 20°c and 5.45 atm …
\(1.59\ mol\)
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calculate the volume that a 0.323 - mol sample of a gas will occupy at …
\(7.81\space L\)
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determine the kelvin temperature required for 0.0470 mol of gas to fill…
\(310\ \text{K}\)
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ideal gas law charles law boyles law combined gas law which law helps u…
Ideal Gas Law
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which is the symbol for an ion with 26 protons and 23 electrons? a ( r^…
C. \(Fe^{3 +}\)
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the care for solar burns is similar to the care for- electrical burns. …
Heat burns.
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what is a cation? an atom that has gained one or more protons to become…
d. an atom that has lost one or more electrons to become positively charged
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the element rubidium is located in group 1, while strontium is located …
A. \(Rb^{+}\) and \(Sr^{2+}\)
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solve the following problem: what pressure is required to contain 0.23 …
\(1.32\ atm\)
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which of the following elements will form +4 ions? a calcium b magnesiu…
C. Germanium
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how does the number of protons compare to the number of electrons in a …
A. There are more protons than electrons.
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a 7.50 liter sealed jar at 18°c contains 0.25 moles of gas. what is the…
\(0.796\ atm\)
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choose the symbol for the barium cation. select all that apply a ba²+ b…
A. \(Ba^{2+}\)
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choose the correct set of variables to solve the following problem: wha…
The fourth option (\(P = 1.2\space atm\), \(V=x\) (unknown), \(n = 3.2\space mol\), \(T = 293\space K\)) is the correct set of variables.
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at 17°c, a 0.80 mole sample of a gas exerts a pressure of 1.2 atmospher…
15.9 Liters
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in the spaces below, write and illustrate electron configurations for t…
- Nitrogen configuration: \(1s^{2}2s^{2}2p^{3}\) - Oxygen configuration: \(1s^{2}2s^{2}2p^{4}\) - Fluorine configuration: \(1s^{2}2s^{2}2p^{5}\) - Neon configuration: \(1s^{2}2s^{…
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choose the symbol for the cesium cation. ect all that apply a $cu^{2+}$…
d. \(Cs^{+}\)
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how many electrons are in na+? enter the answer check it
10
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when an atom gains or loses a number of electrons, it becomes a charged…
ion
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in mg²⁺, the number of electrons is ____. enter the answer check it
\(10\)
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a beryllium atom becomes a beryllium ion by losing two electrons. what …
B. \(Be^{2+}\)
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cations can be formed by ______ electrons. a gaining b losing c sharing…
B. Losing
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iclicker question what change will be caused by the addition of a small…
D. \([F^-]\) will decrease and \([HF]\) will increase
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which of the following is not a factor in the ideal gas law? type of co…
Type of container.
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how many moles of oxygen must be placed in a 3.00 liter container in or…
0.245 moles
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what pressure, in atm, is exerted by 2.50 l of gas containing 1.35 mol …
14.19 atm
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synthesis reactions are characterized by the * following general equati…
- First question: B. False - Second question: A. True - Third question: C. anaphase
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which of the following variables is not correctly matched with its valu…
\(P = 20^{\circ}C\) is not correctly matched (it should be pressure in atm and temperature converted to Kelvin).
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groups in mr. lins science class were given these directions to follow.…
The directions were not followed properly.
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the diagram shows an investigation conducted to determine which liquid …
Use the same amount of liquid in each container.
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solve the following problem: what is the volume of a balloon if it cont…
64.15 L
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a single displacement chemical reaction is* release of heat during a re…
1. displacement of one element in a compound by another element. 2. False 3. double displacement
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if bacl2 and na2so4 solutions are mixed together, a single displacement…
- First question: double displacement reaction occurs. - Second question: True. - Third question: False. - Fourth question: increasing sea level.
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which of the following classifications describes the element with the e…
stable nonmetal
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on a smooth plane mirror, if the angle of incidence is 30°, then the an…
1. \(30^{\circ}\) 2. False 3. decomposition
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identify the period and group of the element that has the electron conf…
period 3, group 15
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what are the conjugate bases of h₂so₄ and hco₃⁻, respectively? a) hso₄⁻…
A. $HSO_{4}^{-}, CO_{3}^{2 - }$
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which type of energy do moving objects have? electrical chemical potent…
kinetic
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how many unshared electrons (dots) are in a correctly drawn lewis struc…
$6$
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lewis structures for covalent compounds involve the —— of —— electrons?…
Sharing, valence
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in a covalent lewis structure valence electrons are shown using dots tr…
True
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which energy level of the period 4 transition elements is being filled …
third
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1. name the compound with the formula n₂o. nitrogen dioxide nitrogen ox…
1. C. dinitrogen monoxide 2. B. covalent
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topic5 d4 assessment periodic table 17 of 42 most of the elements in gr…
B. nonmetals.
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power plants that burn fossil fuels or use nuclear reactions to produce…
thermal (heat) pollution
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a compound dissolves readily in water and conducts electricity only whe…
1. ionic 2. ionic 3. hydrobromic acid
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uranium drag the correct answer into the blank. uranium is a naturally …
Radioactive
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definition 4) glucose, also known as sugar choose an answer c5h12o6 c6h…
\(C_6H_{12}O_6\)
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topic5 d4 assessment periodic table 16 of 42 16. elements in the same g…
number of valence electrons.
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definition carbon dioxide choose an answer co co2 co3 c2o dont know?
\(CO_2\)
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organic waste is especially problematic because it uses large amounts o…
manure from livestock feeding operations
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1. why are the ionic radii generally larger for group 15 than for group…
a. Ions forming from group 15 atoms have a greater negative charge than ions forming from group 17 atoms.
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the outputs of a chemical reaction. located on the right side of a chem…
products
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the law of conservation of mass can be demonstrated by a chemical react…
A.
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write the chemical formula for the ionic compound of calcium ion and su…
1. \(CaSO_{4}\) 2. \(Fe(NO_{3})_{3}\) 3. \(SF_{6}\)
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definition 4) oxygen molecule choose an answer -ose co2 o2 c6h12o6 dont…
\(O_2\)
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based on the law of conservation of matter, describe the relationship b…
A. The mass of the reactants equals the mass of the products.
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the inputs of a chemical reaction. located on the left side of a chemic…
reactants
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conservation of matter compare the box on the left containing the react…
For the first question: A. For the second question: A. The mass of the reactants equals the mass of the products.
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topic5 d4 assessment periodic table 14 of 42 1. where would you expect …
upper right
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picture d represents the only possible option as the correct products. …
C. Picture D has the same number and type of each atom that the reactants contain.
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3) calculate the mass of 4.25 moles of h₂so₄₍ₗ₎. 4) how many grams of k…
3. \(416.5\space g\) 4. \(28.7825\space g\) 5. Balanced equation: \(2Fe_{(s)}+3H_2S_{(aq)}\to3H_2{(g)} + Fe_2S_3{(s)}\) a. \(0.768\space mol\) b. \(4.35\space mol\)
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according to the law of conservation of matter, we know that the total …
B.
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topic5 d4 assessment periodic table 13 of 42 1. which of the following …
O2-
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topic5 d4 assessment periodic table 12 of 42 1. which of the following …
F
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1. atoms with large ionization energy values are _________. ○ most like…
less likely to form positive ions
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what is the percent composition of hydrogen in water (h₂o)?
11.11%
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in calcium carbonate (caco₃), what is the percent composition of oxygen…
\(47.95\%\)
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what should be used to neutralize battery acid spills before cleaning t…
Baking Soda
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part i: review of calculations based on chemical reactions for part i w…
a. \(2NH_4NO_3(s)\xrightarrow{\Delta}2N_2(g)+O_2(g)+4H_2O(g)\) b. \(\frac{7\space mol\space gas}{2\space mol\space NH_4NO_3}\) c. \(4.16\space mol\) (rounded to three significant …
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calculate the percent composition of nitrogen in ammonium nitrate (nh₄n…
35.0%
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1. from the table below, determine the atomic number of the noble gas a…
C. 54
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topic5 d4 assessment periodic table 9 of 42 1. what makes the d block w…
The d sub - orbital can hold ten electrons, making the d block ten elements wide.
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an atom has an outer shell electron configuration of 2s²2p⁶. which stat…
- This represents an element that is a noble gas. - This represents an element with a full outer energy shell of valence electrons.
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dilutions worksheet - solutions 1) if i have 340 ml of a 0.5 m nabr sol…
1. \(0.19\space M\) 2. \(0.033\space M\) 3. \(0.63\space M\) 4. \(1500\space mL\)
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20. which of the following best explains why mendeleevs periodic table …
Atomic number had not yet been discovered.
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8 of 42 1. which of the blocks on the periodic table contains the most …
d block
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the lewis dot structure below is representing an unknown element. which…
- This element has three valence electrons. - This is a group 13 element.