The density of the mercury is 14 gm/ml.
Given,
Volume of cylinder = 22 ml
Mass of mercury in the cylinder = 308 g
We have to find the density of the mercury.
The density of any substance is defined as the mass per unit volume of the substance. Or, it is the ratio of mass to volume. The units of density are kg/m³, g/ml, or g/cm³. Each substance has its own density. It is the mass of an object compared with its volume.
It is given by the formula:
Density = Mass/ volume
Density = 308 gm/ 22 ml
Density = 14 gm/ml
Hence, the density of mercury is 14 gm/ml.
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acetanilide has a solubility of 1.00 g/185 ml in 25 0c water and 1.00 g/10 ml in 100 0c water. if 250 mg of acetanilide was dissolved in 2.5 ml of water, how much acetanilide would remain in solution when the solution was cooled to 25 0c?
The remaining acetanilide when the solution was cooled to 25°C is 13.513 mg.
What happens in the crystallization process?
The solid compound is dissolved in the solvent at elevated temperatures during the crystallization process, and the crystallized product is obtained by slowly cooling the solution.
Given that,
The solubility of acetanilide at 100°C is 1 g per 10 mL of water. Thus, to dissolve 250 mg of acetanilide at a high temperature, that is 100 °C, we need 2.5 mL of water. At 25°C after the re-crystallization there will be some dissolved acetanilide, which can be calculated as- 185mL of water is needed to dissolve 1g or 1000mg of acetanilide at 25°C. Thus, in 2.5 mL of water, there will be
(2.5×1000)/185 = 13.5135 mg of acetanilide.
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Examine the table for the densities of various substances above. If a student has an unknown substance with a mass of 51.3 g and a volume of 4.5 ml. A milliliter is equivalent to a cubic centimeter. Which statements can be supported by the information given here? Select ALL that apply.
Answer:
maby all of them vote from I'll pay get did you
Metals participate in two types of single-displacement reactions. A reactive metal can displace _____ gas either from water or from an aqueous acid. A _____ reactive metal can also displace the ion of a _____ reactive metal from solution.
A reactive metal can displace HYDROGEN gas either from water or from an aqueous acid.
A MORE reactive metal can also displace the ion of a LESS reactive metal from the solution.
A more reactive metal (one that forms positive ions more easily) can displace a less reactive metal from a compound. This is called a displacement reaction. Metal can only displace another metal from a compound if it is located above it in the reactivity series.
As a result, the more reactive metal enters the solution as a cation, whereas the less reactive metal's cations are converted to metal. So more reactive metals displace less reactive metals from their salt solutions.
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What intermolecular force or forces govern the solubility of 9-fluorenone in diethyl ether?.
Dipole-induced dipole attraction intermolecular force governs the solubility of 9-fluorenone in diethyl ether.
A dipole-induced dipole attraction is a type of weak attraction as it results when a polar molecule induces a dipole either in an atom or in a non-polar molecule by disturbing the electron arrangement in the particular non-polar species.
Most organic molecules are polar since they have a dipole moment. On behalf of solvents, polarity refers to solvents having higher polarity, and non-polar solvents with lower polarity. Diethyl ether is located at the lower end of the polarity scale and is generally considered a type of 'non-polar' solvent. Therefore, diethyl ether has a small dipole.
As Diethyl ether has a very low polarity value, if any, it is clear that H-bonding is not possible. London dispersion forces are present in all either polar or non-polar molecules, so it is clear that they are present here too. Since it is slightly polar so it may be exhibiting weak dipole-dipole interactions.
Carbon-donated hydrogen bonding is a real thing but they are generally very very weak non-covalent interactions. . London Dispersion Force is present in every chemical system but is weak as well . There are many exceptions where these forces may be significant in the case of binding energies of several dispersion-dominated molecules.
Therefore, the solubility of 9-fluorenone in diethyl ether is governed by dipole-induced dipole attraction or London dispersion forces.
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what is the name for NaCl?
Answer: Sodium Chloride
Explanation:
Na= sodium Cl= Chloride
Answer
is Nacl
Explanation:
NacI
What does the term “combining capacity” mean?
Answer:
Its valency
The number of valence electrons of an atom gives us an idea of the combining capacity. The number of valence electrons of an atom gives us an idea of the combining capacity.
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an atom of an element has 15 protons and 16 neutrons what is the proton number
Answer: I assume you mean the atomic number.
The atomic number would be 31.
Suppose you have 100. 00 ml of a solution of a dye and transfer 2. 00 ml of the solution to a 100. 00ml volumetric flask. After adding water to the 100. 00 ml mark, you take 5. 00 ml of that solution and again dilute to 100. 00 ml. If you find the dye concentration in the final diluted sample is 0. 000158 m, what was the dye concentration in the original solution.
Using the dilution formula, the dye concentration in the original solution was 0.158 M.
What was the dye concentration in the original solution?The dye concentration in the original solution is determined from the dilution formula as follows:
M₁V₁ = M₂V₂Where M₁ = initial concentration
V₁ = original volume
M₂ = final concentration
V₂ = final volume
For the final dilution:
M₁ = M₂V₂/V₁
M₁ = 0.000158 * 100/5
M₁ = 0.000316 M
For the first dilution:
M₁ = M₂V₂/V₁
M₁ = 0.00316 * 100/2
M₁ = 0.158 M
Therefore, the dye concentration in the original solution was 0.158 M.
In conclusion, the dye concentration in the original solution is obtained using the dilution formula.
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A block has a density of 1.73g/mL. What is the block’s density in mg/L
The formula when converting g/mL to mg/L is to multiply the mass / volume value by 1e+6
When we do this we come up with 1,730,000
This however, should be written as either 1.73⋅10^5 or 1.73E+5.
When 50. 08 g of 1. 00 m naoh at 23 °c is added to 50. 22 g of 1. 00 m hcl at 23 °c, the resulting temperature of the mixture is 29. 7 °c. Is the reaction endothermic or exothermic?.
When 50.08 g of 1.00 M NaOH at 23°C is added to 50.22 g of 1.00 M HCl at 23°C, the resulting temperature of mixture is 29.7°C, then the reaction is exothermic.
An exothermic reaction is a reaction which results in the energy release from a system. Energy is emitted, so there is a decrease in the energy. Thereby, the change in enthalpy is negative.
The amount of heat gained or lost by a sample in a reaction is calculation by using the equation,
q = mcΔT
where,
q = heat energy lost or gained
m = mass of the sample,
c = specific heat
ΔT = change in temperature
Given data :
mass = 50.08 g
c = 4.18 J/gK
ΔT = 29.7°C - 23°C = 6.7 K (we won't change celsius into kelvin as we're calculating the change)
Putting the values,
q = 50.8 x 4.18 x 6.7 = 1422.74 J
We know,
Molality = moles of solute
mass of solute
Moles = molality x mass
= 1.00 M x 50.22 g = 50.22 mol
To calculate change in enthalpy -
ΔH = - 1422.74 J = - 28.33 kJ/mol
50.22 mol
The energy of the product is lower than energy of reactant, it is an exothermic process. Enthalpy change is negative for exothermic reaction.
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5. Determine how the Sun can continue to heat the atmosphere at night. SC.6.E.7.5
Some terminator atmosphere streams over the horizon, and there may be a trace of warmth from sunlight reflected off the lunar surface.
What is the atmosphere?
The layer of gases held by Earth's gravity that surrounds the planet and constitutes its planetary atmosphere is known as the atmosphere or air. The Earth's atmosphere supports life by producing pressure on the Earth's surface, absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and decreasing temperature extremes between day and night.
Some terminator atmosphere streams over the horizon, and there may be a trace of warmth from sunlight reflected off the lunar surface. However, the sun does not, in general, warm the environment at night. As a result, the atmosphere tends to cool during the night, reaching its coldest point right before morning.
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The speed limit on a many u.s. highways is 70 miles per hour. convert this speed to kilometers per day.
The speed limit on a many highways is 70 miles per hour. this speed to kilometers per day is 2703.69 km / day.
The speed limit on u.s highways is given as,
speed = 70 miles per hour or 70 mile / h
we have to convert it in kilometers per day,
so,
1 miles = 1.609344 kilometers
and, 1 day = 24 hours
therefore, in 1 hour = 1/ 24 day
applying above values, we get,
70 mile per hour = ( 70 × 1.609344 ) kilometers × 24 / day
70 miles per hour = 112.65408 kilometers × 24 / day
70 miles per hour = 2703.698 kilometers per day
Hence,The speed limit on a many highways is 70 miles per hour. this speed to kilometers per day is 2703.69 km / day.
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Which object is a liquid, feels sticky, and is brown in color?(2 points)
Chocolate frosting
Coffee
Soil
Maple syrup
Answer:
Maple Syrup
Explanation:
A 5. 00 gram sample of lead and a 3. 20 g sample of iron are placed into 367 ml of water. What will be the new volume level of water in units of ml? the density of lead is 11. 34 g/cc and the density of iron is 7. 874 g/cc. Do not enter ""ml"" as part of your answer.
The new volume level of the water is 357.84 ml.
The mass of the lead sample = 5 gm
The mass of the iron sample = 3.2 g
The volume of the water = 367 ml
The density of lead = 11.34 g/cc
The density of iron = 7.874 g/cc
[tex]Density = \frac{Mass}{ Volume}[/tex]
[tex] Volume = \frac{ Mass}{Density}[/tex]
The volume of the lead is,
[tex]Volume = \frac{Mass \: of \: lead}{ Density \: of \: lead}[/tex]
[tex] \frac{5}{11.34} [/tex]
= 0.441 ml
The volume of lead is 0.441 ml.
The volume of the iron is,
[tex]Volume = \frac{Mass \: of \: iron}{ Density \: of \: iron}[/tex]
[tex] = \frac{3.2}{7.874} [/tex]
= 0.406 ml
The volume of iron is 0.406 ml.
The new volume level of the water sample is,
New volume = Original water volume + Volume of lead + Volume of iron
= 367 + 0.441 +0.406
= 367.84 ml
The new volume level of the water is 357.84 ml.
Therefore, the new volume level of the water without the unit is 357.84.
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which of these is a risk of consuming a nonrewable resource at a high rate
One of the risks of consuming a nonrenewable resource at a high rate is that the resource could be depleted quickly. Option A.
What are nonrenewable resources?Nonrenewable resources are natural resources that are naturally replenished or are replenished at a much slower pace than they are being consumed.
Nonrenewable resources are unique from renewable resources in that the latter are replenished at a much faster rate than they can ever be consumed.
Examples of nonrenewable resources include mineral deposits, crude oil deposits, etc. Examples of renewable resources include solar energy, wind energy, etc.
Thus, if nonrenewable resources are consumed at a high rate, it greatly increases the risk of depletion quickly.
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The options to pick from are:
A.) The resource could be depleted quickly.
B.) The resource could be consumed very quickly.
C.) The resource could be replenished very slowly.
D.) The resource could be replenished quickly.
. if you are presented with the structure a carbon-containing compound, or trying to draw one yourself, what is the rule about the number of covalent bonds to carbon that are normally found in these structures?
The number of covalent bonds formed by carbon is four.
What kind of bond does carbon form?Covalent bonds are formed between carbon atoms and atoms of other elements or carbon. Carbon compounds come in a wide variety, with atom counts ranging from one to thousands.
Since carbon has four valence electrons, it can create four covalent bonds to reach its full outer energy level. The most stable configuration of electrons is at the maximal outer energy level.
Covalent bonds formed between carbon atoms can be single, double, or triple bonds. One pair of electrons is shared by two carbon atoms to form a single bond. They share two pairs of electrons in a double bond and three pairs in a triple bond.
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Which two elements make up this mixture, element C and B element C, and an element D and C or element B And D?
suppose 2 pints of a 19% alcohol solution is mixed with 8 pints of a 90% alcohol solution. what is the concentration of alcohol in the new 10-pint mixture
If we suppose 2 pints of a 19% alcohol solution is mixed with 8 pints of a 90% alcohol, then the amount of alcohol is calculated as 92.8%
What is molarity?A chemical species' concentration in a solution, specifically the amount of a solute per unit volume of solution, is measured by its molar concentration.
Molarity (M) is the amount of a substance that is present in a certain volume of solution.
Molarity is defined as the moles of a solute per liters of a solution which can further be formulated as:
M= Moles of the solute/ volume of solution.
Herein we have
0.19 (2 pints) + 0.90 (8 pints) = 9.28 pints
So, the concentration is:
9.28 pints / 10 pints × 100% = 92.8%.
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How many moles are there in a 3.56g sample of copper (Cu)?
A)1 mole
B)226 moles
C)0.0560 mole
D)17.8 moles
Which is an example of poor safety practices when working outdoors?
O A. Cleaning up your trash
B. Wearing gloves when working with soil
C. Wearing a helmet in dangerous areas
OD. Eating a plant to test it
Answer:
A poor safety practice would be to eat a plant to test it.
Explanation:
D. Eating a plant to test it.
→ You shouldn’t eat a random plant without knowing what it is or without washing it.
hopefully this helps you ^^
Answer:
D. Eating a plant to test it
Explanation:
Cleaning up, wearing gloves and a helmet are safe when working outdoors. Eating certain plants can be harmful, especially if you're not familiar with it.
At the end of an enzymatic reaction, what will the concentrations of the substrate, product, and enzyme be relative to the start of the reaction?.
At the end of an enzymatic reaction there remains a product and the unaltered enzyme.
What happens when the substrate concentration in an enzymatic reaction is increased?Concentration of Substrate: To a point, increasing the substrate concentration also increases the rate of reaction. Any increase in substrate will have no effect on the rate of reaction once all of the enzymes have bound, because the available enzymes will be saturated and working at their maximum rate.The products of the reaction are released from the active site and diffuse away after the reaction occurs." by OpenStax College, Biology, CC BY 3.0. We know that when an enzyme binds to its substrate, it lowers the activation energy of the reaction, allowing it to happen faster.One of the most important properties of enzymes is that the reactions they catalyse leave them essentially unchanged. After catalysing a reaction, an enzyme releases its products (substrates).This means that as the enzyme concentration decreases, so will the reaction rate. In most biological environments, the enzyme concentration is lower than the substrate concentration. The proportionality between enzyme concentration and enzyme activity is direct.To learn more about enzymatic reaction refer to
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2. A lamp weighs 78 pounds; this would be how many kilograms?
a pound is 0.45359237 kilograms if you do it out or you could round it to 0.45
so 78 pounds is 35.3802049 kilograms, or you could round it to 35.38
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what is net ionic equation for the reaction shown below? AgNO3(aq)+NaCl(aq)=AgCl(s)+NaNO3(aq)
The net Ionic equation for the reaction is
Ag⁺+ Cl⁻→ AgCl
The symbolic depiction of a chemical reaction using symbols and equations is known as a chemical equation.Spectator ions are ions that are present on both sides of chemical reactions but do not take part in the reaction itself. The spectator ions on both sides of the equation are cancelled in the net chemical reaction.Steps for writing net ionic equation:
write the balanced chemical equation.Split soluble compounds into ions.cross out the spectator ions on the both side of the ionic equation.Write the remaining substances as net ionic equation.Balanced Chemical equation:
AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)
Splitting
Ag⁺ + NO³⁻ + Na⁺ + Cl⁻ → AgCl + Na⁺ + NO³⁻
Net Ionic Equation
Ag⁺+ Cl⁻→ AgCl
Na⁺ and NO³⁻ are spectator ions, hence they are not included in the net ionic equation. Because it exists in solid form, AgCl cannot be separated into ions.
Therefore, net ionic equation is
Ag⁺+ Cl⁻→ AgCl
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13. In a science experiment, the
manipulated or changed.
dependent
stipulated
independent
none of the above
variable is the one that is
Answer:
In a science experiment, the
manipulated or changed.
= Independent variable
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. How do molecules move during passive transport?
In passive transport, substances move from an area of higher concentration to an area of lower concentration in a process called diffusion. A physical space in which there is a different concentration of a single substance is said to have a concentration gradient.
In passive transport, substances move from an area of higher concentration to an area of lower concentration in a process called diffusion. A physical space in which there is a different concentration of a single substance is said to have a concentration gradient.
Need help with chemistry homework use the density of palladium (d = 12.1 g/cm3) to determine the volume in cubic centimeters of a sample that has a mass of 44.1 ounces. (1 ounce = 28.35 grams)
The volume of the palladium is 103.3 cubic centimeters.
What is the palladium density?Palladium is a metal in Periodic Table Group VIII with the atomic number 46, atomic weight 106.4, and density 12 Mg/m3. It has a melting point of 1552 C and a boiling point of 3980 C.Density is the number of things (people, animals, plants, or objects) in a given area. To calculate density, divide the number of objects by the area measurement. A country's population density is the number of people divided by its area in square kilometers or miles.We know that;
1 ounce = 28.35 grams
44.1 ounces = 44.1 ounces * 28.35 grams/1 ounce
= 1250.23 g
Density = mass/volume
volume = mass/Density
volume = 1250.23 g/12.1 g/cm3
volume = 103.3 cubic centimeters
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The palladium has a volume of 103.3 cubic millimeters.
What is density?A substance's density is determined by how much mass or amount there is per unit of volume.
Mass divided by volume is the formula for density.
On the periodic table, density varies from element to element and is influenced by external factors like temperature and atmospheric pressure.
1 pound equals 28.35 grams.
1 ounce = 28.35 grams, thus 44.10 ounces equals 1250.23 grams.
Mass/volume = Density.
Volume = Mass / Density.
For example, volume = 1250.23 g times or 12.1 g per cubic centimeter.
Volume = 103.3 cubic centimeters
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A cube of gold-colored metal with a volume of 54 cm3 has a mass of 980 g. The density
of gold is 19.3 g/cm3. Is this sample of metal pure gold?
Answer:
A gold-colored metal with a volume of 59 cm3 and a mass of 980 g will have a density of 16.61 g/cm3 instead of 19.3 g/cm3
Recall that the density of a substance is the ratio of its mass and that of its volume.
In other words; density = mass/volume
In this case, the mass of the gold-colored metal is 980 g while the volume is 59 cm3
density of the metal = 980/59
= 16.61 g/cm3
Thus, the density of the gold-colored metal is 16.61 g/cm3, instead of 19.3 g/cm3
Explanation:
A beaker contains a mixture of sand and salt. A student adds water to dissolve the salt. Which processes can be used to separate out the sand and salt?
Filtration and evaporation are used to separate sand and salt mixture.
Separation of salt and sand mixture is as follows :-
The mixture of salt and sand is separated by filtration followed by an evaporation processes.Filtration is used to separate sand from a combination of sand and salt solution Sand is left on the filter paper as a residue after filtering. By boiling the filtrate left on filter paper , common salt may now be produced. Boiling causes all of the water to evaporate, leaving salt behind . This is known as evaporation.In other words, based on the fact that salt is soluble in water, while sand is not. So, you used the difference in solubility to separate a mixture of sand and salt.
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Answer: Filtration to collect the sand and distillation to collect the salt.
Explanation:
using the results of our calculations in class (you do not need to rederive these relationships, just use them!), what is the maximum radius of an atom that will just fit into a octahedral hole site in fcc ni without distorting the structure?.... the octahedral hole site of bcc fe
The radius of the atom that just fits into the octahedral site is 0.414 times the radius of Fe.
What is the radius ratio rule?The ratio of a cation's lower ionic radius to its greater ionic radius (anion) is known as the radius ratio.
What is the importance of this rule?This rule aids in figuring out how ions are arranged in distinct crystal formations. It aids in determining an ionic crystal structure's stability.
According to the limiting radius ratio,
= 0.414
R = radius of an atom
r = radius of Fe
Hence, the radius of the atom that just fits into the octahedral site, R = 0.414 ×r
R= 0.414 times radius of Fe(r)
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Your lab supervisor tells you to heat a chemical until it is 165 degrees* F . What should your thermometer (which measures in C) read when it reaches the correct emperature ?
Answer:
73.8888 repeated
Explanation: