Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
-
end of semester test 38 select the correct answer. among these properti…
E. sour taste
-
liquid a is known to have a lower vapor pressure and lower surface tens…
1. Eventually both liquids boil, B first and then A. 2. $V_A$ will be greater than $V_B$
-
if morality represents the way we would like the world to work and econ…
to lend credibility and additional support to their conclusion
-
liquid a is known to have a higher vapor pressure and higher viscosity …
It's impossible to predict whether $V_A$ or $V_B$ will be greater without more information. It's impossible to predict whether either liquid boils without more information.
-
drag each quantity to the correct location on the table. complete the t…
| | Bond Energy | Bond Length | |--|--|--| | N - N | 167 kJ/mol | 145 pm | | N = N | 418 kJ/mol | 125 pm | | N≡N | 942 kJ/mol | 110 pm |
-
liquid x is known to have a lower viscosity and lower vapor pressure th…
First experiment: \(p_X\) will be less than \(p_Y\) Second experiment: \(t_X\) will be less than \(t_Y\)
-
liquid x is known to have a lower vapor pressure and lower surface tens…
1. $S_X$ will be equal to $S_Y$ 2. $m_X$ will be less than $m_Y$
-
decide which intermolecular forces act between the molecules of each co…
| compound | dispersion | dipole | hydrogen - bonding | | ---- | ---- | ---- | ---- | | $Cl_2$ | Yes | No | No | | carbon tetrabromide | Yes | No | No | | $CH_2Cl_2$ | Yes | Yes |…
-
type the correct answer in the box. sodium carbonate (na₂co₃) is someti…
109
-
decide which intermolecular forces act between the molecules of each co…
| compound | dispersion | dipole | hydrogen - bonding | |--|--|--|--| | SiH₄ | √ | | | | HClO | √ | √ | √ | | COS | √ | √ | | | CH₂O | √ | √ | |
-
decide which intermolecular forces act between the molecules of each co…
| compound | dispersion | dipole | hydrogen - bonding | | ---- | ---- | ---- | ---- | | hydrogen fluoride | √ | √ | √ | | methane ($CH_4$) | √ | | | | chloromethane ($CH_3Cl$) | √…
-
34 select the correct answer. a compound has a molecular weight of 112.…
A. \(C_6H_8O\)
-
read shakespeares sonnet 19 devouring time, blunt thou the lions paws, …
- the abab, cdcd, efef, gg rhyme scheme - the widespread use of iambic pentameter - the use of three quatrains followed by a couplet
-
use the observation in the first column to answer the question in the s…
1. Substance A 2. Substance C 3. Substance E
-
32 select the correct answer. which action would reduce the activation …
A. adding a catalyst to the reaction
-
type the correct answer in the box. given: cac₂ + n₂ → cacn₂ + c in thi…
$92.7$
-
use the observation in the first column to answer the question in the s…
Substance F Substance A Substance C
-
use the observation in the first column to answer the question in the s…
1. Substance B 2. It's impossible to know without more information 3. Substance F
-
29 select the correct answer. use the periodic table to determine what …
D. $^{135}_{56}Ba$
-
28 select the correct answer. how many atoms of n are in 137.0 grams of…
D. $2.171\times 10^{24}$
-
27 select the correct answer. what is the empirical formula of a compou…
D. \(Al_2S_3\)
-
use the observation in the first column to answer the question in the s…
Substance D Substance F Substance A
-
select the correct answer from each drop - down menu. for a gas to be s…
First drop - down: polar Second drop - down: low Third drop - down: high
-
use the observation in the first column to answer the question in the s…
1. Substance A 2. Substance D 3. Substance F
-
noemi is writing an essay on organic foods. she wishes to include prope…
A. She could summarize the ideas from the source C. She could paraphrase the ideas from the source D. She could directly quote the ideas from the source
-
24 select the correct answer. what is the molar mass of alcl₃? a. 62.43…
D. 133.33 g/mol
-
23 select the correct answer. which statement correctly relates two sub…
C. $NH_4^+$ is the conjugate acid of $NH_3$.
-
drop each atom/ion in the correct category. an atom/ion with the oxidat…
An atom/ion with the oxidation number + 7: Mn in \(KMnO_4\), Cl in \(Cl_2O_7\) An atom/ion with the oxidation number + 4: Pb in \(PbO_2\), V in \(VCl_4\) An atom/ion with the oxid…
-
this graph shows how the vapor pressure of three liquids varies with te…
most volatile: acetone least volatile: benzene acetone: 56 methanol: 65 benzene: 80 less
-
22 drag each label to the correct location. identify the molecular shap…
trigonal pyramidal, tetrahedral, trigonal planar, bent
-
this graph shows how the vapor pressure of three liquids varies with te…
most volatile: tetrahydrofuran least volatile: isopropyl acetate tetrahydrofuran: 66 cyclohexane: 81 isopropyl acetate: 89 less
-
this graph shows how the vapor pressure of three liquids varies with te…
most volatile: hexane least volatile: isopropyl acetate hexane: 69 ethanol: 78 isopropyl acetate: 89 more
-
which statements describe iambic pentameter as it is used in shakespear…
- Each line contains five metrical feet. - In a group of two syllables, the second is stressed.
-
fill in the missing words if the following reaction is balanced correct…
The coefficient in front of $O_{2}$ is 13, and the coefficient in front of $H_{2}O$ is 10.
-
fill in the missing words if the following reaction is balanced correct…
The coefficient in front of $H_2$ is 3, and the coefficient in front of $Al$ is 2.
-
fill in the missing words. if the following reaction is balanced correc…
The coefficient in front of $NaOH$ is 2, and the coefficient in front of $H_2O$ is 1.
-
fill in the missing words interpret the following reaction by filling i…
Solid; Aqueous; Gas; Liquid; Reactants; Products
-
4. interpret a chemical equation of decomposition of hydrogen peroxide …
Hydrogen peroxide in a water - solution in the presence of potassium iodide decomposes producing oxygen gas and liquid water.
-
3. two equations below look like they are balanced, and they are, but t…
a) The coefficients are not in the simplest ratio. Correct equation: $Mg(OH)_2(s)+2HCl(aq) ightarrow MgCl_2(aq) + 2H_2O(l)$ b) Coefficients should be whole - numbers. Correct equa…
-
how did the lewis and clark expedition create a contradiction in jeffer…
It required federal funding despite Jefferson's opposition to government programs.