To find the density of a liquid with a mass of 22.00 grams and a volume of 10.0 ml, divide the mass by the volume to get a density of 2.20 g/ml.
Explanation:To calculate the density of a liquid, you can use the formula:
Density = mass / volume
In this case, the mass of the liquid is 22.00 grams and the volume is 10.0 ml (which can also be written as 10.0 cm³ as 1 ml is equivalent to 1 cm³). Plugging these values into the formula gives us:
Density = 22.00 g / 10.0 ml = 2.20 g/ml
Therefore, the density of the liquid is 2.20 g/ml.
What is present in the glucose molecule that is missing in the carbon dioxide molecule?
During an effusion experiment, oxygen gas passed through a tiny hole 2.5 times faster than the same number of moles of another gas under the same conditions. What is the molar mass of the unknown gas? (Note: the molar mass of oxygen gas is 32.0 g/mol.)
Answer:
2.0 x 10^2g
Explanation:
A glucose solution is 3.25% glucose by mass and has a density of 1.03 g/ml. what mass of glucose is contained in 58.2 ml of this solution?
What is ionization energy?
The ionization energy is the amount of energy needed to remove a valence electron. Valence electrons are the outermost electrons.
When copper sulfate reacts with sodium hydroxide solution, a precipitate of copper hydroxide and a solution sulfate are formed
Acids generally have an excess of ______ ions in solution, while bases usually have an excess of ______ ions in solution.
Which of the following quantum number combinations is not allowed in a ground-state atom? (7, 4, -2, -½) (3, 0, 0, +½) (2, 1, 1, -½) (3, 2, 3, +½)
If liquid a is more volatile than liquid b, which is also true? hints if liquid a is more volatile than liquid b, which is also true? liquid a has a lower vapor pressure than liquid
b. liquid a has stronger intermolecular forces than liquid
b. liquid a evaporates more slowly than liquid
b. liquid a has a lower boiling point than liquid
b.
Answer:
Liquid a has a lower boiling point than liquid b.
Explanation:
Hello,
In this case, volatility is associated with three factors:
1. Vapor pressure: this is the pressure exerted by the gas molecules in equilibrium with the liquid. The higher the vapor pressure, the higher the volatility.
2. Intermolecular forces: are the interactions attracting or repelling the material's molecules. The stronger the forces, the lower the volatility as the molecules remain strongly closer.
3. Boiling point: is the condition of both temperature and pressure at which a liquid passes from liquid to gas. The lower the boiling point, the higher the volatility as more molecules easily pass from liquid to gas.
In such a way since liquid a is more volatile than liquid b, the answer is liquid a has a lower boiling point than liquid b based on the aforesaid factors.
Best regards.
What is the concentration, in grams per liter, of a solution prepared by dissolving 0.00040 mol HCl in 2.2 L H2O? Assume that the volume of the solution does not change when the HCl is added.
On Ed. the exact answer is 0.0066.
Calculate the amount of heat required to vaporize 84.8 g of water at its boiling point.
Answer: Amount of heat required to vaporize 84.8 g of water is 191.7kJ.
Explanation: We are given 84.8 grams of water, to convert it into moles, we use the formula:
[tex]Moles=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
Molar mass of water = 18 g/mol
[tex]Moles=\frac{84.8g}{18g/mol}=4.71moles[/tex]
As we know that [tex]\Delta H_{vap}[/tex] for 1 mole of water at 100° C is 40.7 kJ/mol
So, to calculate the amount of heat required, we use the formula:
[tex]q=m\Delta H_{vap}[/tex]
Putting the values in above equation, we get
[tex]q=4.71mol\times 40.7kJ/mol[/tex]
q = 191.7kJ
A solution of sucrose in water has a boiling point that is _____ 100°C.
An electrochemical cell is powered by the half reactions shown below.
Ag+(aq) + e– Ag(s) Eo = +0.80 V
Pb2+(aq) + 2e– Pb(s) Eo = –0.13 V
Which value represents the overall electric cell potential?
Use Ecell = Ered, cathode – Ered, anode.
–0.13 V
–0.93 V
+0.67 V
+0.93 V
A certain compound is made up of two chlorine atoms, one carbon atom, and one oxygen atom. what is the chemical formula of this compound
Answer:
ClCO2
Explanation:
if you drop a 50 gram piece of metal with a temperature of 125° Celsius into 1000 grams of water at 20° Celsius, what best describes what would occur?
A combination reaction occurs when one reactant forms two or more products true or false
Answer:
its true for apex ;)
Explanation:
A student arranged the four cards sequentially in a row on the basis of the periods when these events occurred. The card showing the earliest event was placed on the extreme left. Which of these cards was placed third in the row?
The sequences of the geological happenings in the periodical order is called the geological time's scale. The card of the third row depicts the first flowering plant.
What is the order of the events?Events of the evolution can be explained based on the geological timelines and are arranged on the basis of their discoveries. In the question, the order of the events is arranged from the earliest to the newest.
The earliest event was the appearance of life in the sea followed by the rock formation. The third event was the appearance of the flowering plant on the land followed by land animals.
Therefore, the third card depicts the flowering land plant.
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What type of bond is easily disrupted in aqueous solutions?
Which drawing depicts the electron configuration of nitrogen?
Which laws can be combined to form the ideal gas law?
Boyle’s law and Charles’s law
Gay-Lussac’s law and Avogadro’s law
Charles’s law, Avogadro’s law, and Boyle’s law
Dalton’s law, Gay-Lussac’s law, and Avogadro’s law
Charles’s law, Avogadro’s law, and Boyle’s law can be combined to form the ideal gas law.
What is Boyle's law?
Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.
Mathematically, it can be stated as,
P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.
According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,
P₁V₁=P₂V₂
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Write balanced chemical equation for the oxidation of fe2+(aq) by s2o2−6 (aq).
What is the molecular mass of cholesterol if .00105mol wieghs .406g?
Petrolyn motor oil is a combination of natural oil and synthetic oil. it contains 8 liters of natural oil for every 5 liters of synthetic oil. in order to make 728 liters of petrolyn oil, how many liters of synthetic oil are needed?
According to Charles law, which two quantities are directly proportional?
A.) time and pressure
B.) volume and pressure
C.) volume and temperature
D.) pressure and temperature
The partial charges on a water molecule occur because of ______________.
Earth is the only planet that has a _____ and a _____.
How many moles of libr are contained in 347 g of water in a 0.175 m libr solution?
Answer:
Molaridad = número de lunares de soluto/Kg de disolvente
La molaridad se da en el problema como 0,175 m
Masa de disolvente = 347 gm = 0,347 Kg
por lo tanto
0.175 = número de lunares de LiBr / 0.347
número de lunares de LiBr = 0,175 x 0,347 = 0,060725 lunares
Explanation:
Consider three 10-g samples of water: one as ice, one as liquid, and one as vapor. how do the volumes of these three samples compare with one another?
Ice has the largest volume, followed by liquid water, and then water vapor.
Explanation:Water is one of the few substances on Earth that exists naturally in all three states: solid (ice), liquid (water), and gas (water vapor). The density of each state of water varies, with the vapor state being the least dense and the liquid state being the most dense. The solid state, which is ice, is less dense than the liquid state. So, in terms of volume, the ice sample will have the largest volume, followed by the liquid water sample, and then the water vapor sample, which will have the smallest volume.
which of the following is the most reasonable explanation for a drop in temperature of gas?
A) a decrease in the volume of the container
B) a decrease in the average kinetic energy of the gas particles
C)an increase in the average potential energy of the gas particles
D) an increase in gas pressure
Answer: The correct answer is option B.
Explanation:
Average kinetic energy of the gas molecule is given by relation:
[tex]E_K=\frac{3}{2}\frac{R}{N_A}\times T[/tex]
[tex]N_A[/tex] = Avogadro Number
T = Temperature of the gas in Kelvins.
R = Universal gas constant
[tex]E_K\propto T[/tex]
With increase in temperature the kinetic energy of the gas molecule increases and vice-versa.
So, according to the question the explanation for a drop in temperature of the gas is decrease in average kinetic energy of the gas molecules.
Hence, the correct answer is option B.
Rank the homologous series for a set of alkanes by their boiling point? The boiling points for a set of compounds in a homologous series can be qualitatively predicted using intermolecular force strengths. Using their condensed structural formulas, rank the homologous series for a set of alkanes by their boiling point.
Rank these alkanes from highest to lowest boiling points
1....; The correct answer is heptane 3,3-dimethylpentane hexane butane. Thanks though, your tip helped!
Alkanes from highest to lowest boiling points:
1. heptane2. 3.3 dimethyl pentane3. hexane4. butaneFurther explanationAlkanes are saturated hydrocarbons with all carbon bonds being single bonds
General formula:
[tex]\large{\boxed {\bold {C_nH_{2n + 2}}}[/tex]
There are several rules for naming alkanes from IUPAC:
the name of the branch followed by the name of the main chain the main chain is the longest chain that has the most branches branches are given the name alkyl with the symbol -R, and begin with a number, with the position of the branch getting the smallest number more than one branch is prefixed in, tri, tetra, penta, etc. and in alphabetical order with the smallest number.In determining the alkane boiling point, if in the same homologous series, then just look for alkanes with the largest relative molecular mass that will have a large boiling point too. So in an alkane in the form of a straight-chain, the more carbon atoms, the longer the main chain, the bigger the boiling point.
But if the relative molecular mass is the same, the alkanes have fewer branches will have a greater boiling point.
The more branches, the lower the boiling point, even though the number of carbon atoms is the same (as in isomers)
In isomers that have the same molecular formula and relative molecular mass, alkanes that have the fewest branches will have the largest boiling point.
So that the general determination of the alkane boiling point is (based on its priority)
1. relative molecular massthe greater the higher the boiling point
2. main chain branchthe fewer branches the higher the boiling point
The branching on the main chain in the alkane structure causes the attraction between the molecules to be lower so that to release this attractive force only requires low energy, ie at low temperatures
The relative molecular mass of each alkane in the above problem is:
1. heptane: 1002. 3.3 dimethyl pentane: 1003. hexane: 864. Butane: 58The relative molecular mass values above indicate that there are similarities in the relative molecular mass values of heptane and 3.3 dimethyl pentane. But because the unbranched chain has a higher boiling point so heptane has a greater boiling point than 3.3 dimethyl pentane
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Keywords: alkanes, main chains, branches, boiling points, relative molecular mass
A compound is a liquid at room temperature, dissolves in water, and the resulting solution is weakly conducting. the compound is polar molecular: true of false?
Final answer:
The compound being a liquid at room temperature, dissolving in water, and the resulting solution being weakly conducting indeed suggests it is a polar molecular compound. This is because its behavior aligns with polar molecular compounds' typical properties, such as solubility in water and poor conductivity compared to ionic solutions.
Explanation:
The statement that a compound is a liquid at room temperature, dissolves in water, and the resulting solution is weakly conducting, indicating that the compound is polar molecular, is true. This can be understood by considering the basic properties of molecular and ionic compounds. Molecular compounds, which are composed of molecules formed by covalent bonds, can be polar if they have an uneven distribution of electron charge. When such a polar molecular compound dissolves in water, which itself is a polar solvent, it can interact with water molecules through hydrogen bonding or dipole-dipole interactions. This explains the solubility of the compound in water.
However, the weak conductivity of the solution suggests that it does not contain free ions in large amounts, as would be expected from an ionic compound dissolved in water. Instead, the slight conductivity can be attributed to a small degree of ionization or the presence of polar molecules that are not completely non-conductive but are far less efficient in conducting electricity than ions. Therefore, considering the compound's liquid state at room temperature, its solubility in water, and its weak electrical conductivity in solution, it aligns well with the characteristics of a polar molecular compound rather than an ionic compound.