can we seperate naphthalene from sugar by filtration to obtain pure sugar?
Answers
Answer:
As Naphthalene undergoes sublimation, we use sublimation process. On condensing naphthalene can be separated.
Related Questions
If 12.3 mol HCl are produced in this reaction, how many grams of sodium sulfate are produced?
Answers
ANSWER
The mass of Na2SO4 is 874g
EXPLANATION
Given that;
The number of moles of HCl is 12.3 mol
Follow the steps below to find the mass of sodium sulfate produced
Step 1; Write a balanced equation for the reaction
\(\text{ 2NaCl + H}_2SO_4\text{ }\rightarrow\text{ 2HCl + Na}_2SO_4\)In the reaction above, 2 moles of NaCl react with 1 mole of H2SO4 to give 2 moles of HCl and 1 mole of Na2SO4
Let the number of moles of Na2SO4 be x
\(\begin{gathered} \text{ 2 moles HCl }\rightarrow\text{ 1 mole Na}_2SO_4 \\ \text{ 12.3 moles HCl }\rightarrow\text{ x moles Na}_2SO_4 \\ \text{ Cross multiply} \\ \text{ 2 moles HCl }\times\text{ x moles Na}_2SO_4\text{ }=\text{ 1 mole Na}_2SO_4\text{ }\times\text{ 12.3 mole HCl} \\ \text{ Isolate x} \\ \text{ }\times\text{ }=\text{ }\frac{1\text{ mole Na}_2SO_4\times12.3mol\cancel{HCl}}{2moles\cancel{HCl}} \\ \text{ } \\ \text{ x = }\frac{1\text{ }\times\text{ 12.3}}{2} \\ \text{ x = 6.15 moles} \end{gathered}\)The number of moles of Na2SO4 is 6.15 moles
Step 3; Find the mass of Na2SO4 using the below formula
\(\text{ mole = }\frac{\text{ mass}}{\text{ molar mass}}\)Recall, that the molar mass of Na2SO4 is 142.04 g/mol
\(\begin{gathered} \text{ mass = mole }\times\text{ molar mass} \\ \text{ mass = 6.15 }\times\text{ 142.04} \\ \text{ mass = 873.546} \\ \text{ mass = 874g Na}_2SO_4 \end{gathered}\)Therefore, the mass of Na2SO4 is 874g
which of the following is an example of a Brønsted-Lowry base?
Answers
Answer:
it's ammonia. option a
Explanation:
a
When the metal was added to the calorimeter, some of the water splashed out. How would the loss of water in the Styrofoam cup affect the final temperature
Answers
The final temperature of the cup may be less than accurate thereby affecting the entire results of the experiment carried out using the cup.
A styrofoam cup is an insulated material. A styrofoam cup prevents heat gain or looses from the cup. Heat is gained by the water inside the styrofoam cup. The cup prevents exchange of energy with the environment.
When water is lost from the styrofoam cup, the final temperature of the cup may be less than accurate thereby affecting the entire results of the experiment carried out using the cup.
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Is Iron rusting a physical, or chemical change?
Answers
Answer:
the answer is chemical change because the act of rusting changes the substance of iron
Explanation:
40 points plz help quick!! Order the interactions from strongest to weakest.
1. Covalent Bond
2. Ionic Bond
3. Dipole-Dipole Interactions
4. Hydrogen Bond
5. Dispersion forces
Answers
Answer:
2,5,4,1,3
Explanation:
Answer:
Ionic Bond
Explanation:
To what does habitat loss pose the greatest threat?
Responses
exotic species
agriculture
biodiversity
water supply
Answers
Answer:
animals
Explanation:
I think I remember this from a quiz I took so exotic species
A scientist needs a 1.0 M solution of sodium hydroxide. She has 250 mL of a 5.0 M
solution in her storeroom. How much of the new solution can she make?
Answers
The amount of new solution that the scientist can make is 1250mL.
How to calculate molarity?Molarity is the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.
According to this question, a scientist needs a 1.0 M solution of sodium hydroxide. She has 250 mL of a 5.0 M solution in her store room.
CaVa = CbVb
Where;
Ca and Va = initial concentration and volumeCb and Vb = final concentration and volume250 × 5 = 1 × Vb
Vb = 1250mL
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how many moles are there in 4.00 moles of glucose, C₆H₁₂O₆
Answers
2.40 ×10²⁴ molecules are there in 4.00 moles of glucose, C₆H₁₂O₆. A molecule is a collection of at least two atoms.
What is molecule?According on the context, the word can or cannot encompass ions that meet this requirement. A molecule is a collection of at least two atoms bound together by the attractive forces called as chemical bonds.
When speaking of polyatomic ions, the difference between them and ions is frequently ignored in the fields of quantum theory, organic chemistry, especially biochemistry.
number of molecule = number of moles × 6.022×10²³
= 4× 6.022×10²³
= 2.40 ×10²⁴ molecules
Therefore, 2.40 ×10²⁴ molecules are there in 4.00 moles of glucose, C₆H₁₂O₆.
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Street lights are yellow/orange in color and not white. Based on your flame test data, what gaseous element is present in street lights?
Answers
Answer: sodium
Explanation: Because each element has an exactly defined line emission spectrum, scientists are able to identify them by the color of flame they produce. For example, copper produces a blue flame, lithium and strontium a red flame, calcium an orange flame, sodium a yellow flame, and barium a green flame.
Based on the flame test, the gaseous element which is present in street lights is sodium.
What is spectrum?Spectrum is a table or a chart in which intensity of the emitted lights are showing over a range of species.
Each element show different color of spectrum in the emission process, whenever excited element emitted enegy then released energy is shown in the form of color spectrum. In traffic lights sodium lamps are present which in the presence of heat gets excited and changes to the gas form and emitted yellow color light.
Hence sodium gaseous element is present in street lights.
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Help me please
Can someone help me and explain how to find the configuration pleasee
Answers
The numbers in the powers are the number of electrons in a specific orbital. so you can add them to find the atomic number
4. What is free energy?
Answers
Answer:
A thermodynamic quantity equivalent to the capacity of a system to do work.
Explanation:
Simple syrup is made by dissolving sugar in water. if you combine 8 ounces of hot water with 4 ounces of sugar to create a simple syrup, what would you expect the syrup to weigh? why?
Answers
We can expect the syrup to weigh 12 ounces.
Ounces of hot water = 8
Ounces of sugar = 4
The volume of a liquid is measured in fluid ounces, and the solid's mass is measured in net weight. To weigh the fluid in the container, it needs to be poured, then the empty container is weighed, and it is required to subtract the empty container's mass from the filled container's mass to determine the fluid's mass.
In the given case, the weight of the syrup will be the sum of the weights of the water and sugar that are ideally used to make it.
Therefore,
Calculating the total weight -
Total weight = Ounces of hot water + Ounces of Sugar
= 8 + 4
= 12
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How did the atomic model change due to the research of thomson, rutherford, and bohr?
Answers
Answer:
Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup." Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happen? The two systems must be the same temperature. The two systems must not be touching each another. One system must have higher kinetic energy than the other system. The thermal energy of one system must be the same as the thermal energy of the other system. Mark this and return
Answers
The thermal energy of one system must be the same as the thermal energy of the other system. Therefore, the correct option is option D.
What is conduction?A pan heats up when you place it on the flame. It's because heat is transferred from the burner to the pan. Additionally, it allows any other utensil or pan to heat up. But after a while, the vessel cools down when you remove it from the heat. It happens because the vessel's heat is dissipated onto the surrounding area. It enables the vessel to cool.
Heat that flows by conduction is the transfer of thermal energy between substances in contact. The thermal energy of one system must be the same as the thermal energy of the other system.
Therefore, the correct option is option D.
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what the function of the male reproduction system called scrotum
Answers
Answer:
The bag of skin that holds and helps to protect the testicles. The testicles make sperm
Explanation:
3. A polyatomic ion is formed from more than one atom.
True or false
Answers
Answer:
true
Explanation:
Dental implant data: The hardness of metal implant in dental cavities depends on multiplefactors, such as the method of implant, the temperature at which the metal is treated, thealloy used as well as on the dentists who may favour one method above another and maywork better in his/her favourite method. The response is the variable of interest.
Answers
The hardness of metal dental implants depends on implant method, treatment temperature, alloy used, and dentist expertise.
The hardness of a metal implant in dental cavities is influenced by various factors. Firstly, the method of implantation plays a crucial role. Different techniques, such as immediate placement or two-stage placement, can affect the final hardness of the implant.
Secondly, the temperature at which the metal is treated during fabrication and processing can impact its hardness. Higher temperatures can lead to improved hardness properties.
Moreover, the choice of alloy used for the implant material is significant. Different alloys, such as titanium or zirconia, possess varying hardness characteristics, affecting the overall hardness of the implant.
Dentists may have their preferences for specific alloys based on their experiences and patient needs.
Lastly, the skill and technique of the dentist performing the implantation procedure can influence the hardness outcome. Dentists who are proficient and experienced in a particular method may achieve better results in terms of hardness.
In summary, the hardness of a metal implant in dental cavities depends on factors like the implantation method, temperature during treatment, choice of alloy, and the expertise of the dentist.
Understanding and optimizing these factors can contribute to achieving desirable hardness properties for dental implants.
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Which level of ecological organization includes both biotic and abiotic factors
Answers
The answer is Ecosystem
Answer:
ecosystem
Explanation:
i took it on edge 2021 and got 100
The specific heat of nickel is 0.445 J/g degree Celsius. How much heat is required to heat a 168 gram piece of nickel from 15.2 degrees Celsius to 43.6 degrees Celsius?
Answers
ANSWER - 2123.184 J
EASYYYYYYY!!!!!!!!!!!!!!
Describe three different organic farming techniques that do not use artificial fertilizers or pesticides . What are one short-term and one long-term benefit to using these alternative methods?
Answers
Answer:
Agriculture was practiced for thousands of years without the use of artificial chemicals. Artificial fertilizers were first created during the mid-19th century. These new agricultural techniques, while beneficial in the short term, had an Institute of Plant Industry to improve traditional farming methods in India.
Explanation:
If you added a big pile of rocks into the boat so that the mass of the rocks was greater than the displaced water, what would happen to the ship?
Answers
Answer:
it would sink to the bottom of the ocean and break in half
Explanation:
Explanation:
so if the ship was on displaced water then the ship would sink to the bottom of the ocean
When solutions of silver perchlorate, AgClO4 (aq) , and ammonium iodide NHI (aq) , are mixed, a solid precipitate forms, indicating a reaction: Which species should appear in the net ionic equation representing the reaction? Select one or more: NH4C1O4 NH4I C1O4 Agl AgC1O4 Ag NH4
Answers
The species that should appear in the net ionic equation representing the reaction are Ag⁺, I⁻, and AgI.
First, let's write out the balanced chemical equation for the reaction:
AgClO₄(aq) + NH₄I(aq) → AgI(s) + NH₄ClO₄(aq)
Now, we'll write the total ionic equation:
Ag⁺(aq) + ClO₄⁻(aq) + NH₄⁺(aq) + I⁻(aq) → AgI(s) + NH₄⁺(aq) + ClO₄⁻(aq)
To find the net ionic equation, we remove the spectator ions (ions that do not change during the reaction):
Ag⁺(aq) + I⁻(aq) → AgI(s)
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suppose a dcp solution titrates 0.15 mg ascorbic acid per ml. How many mg ascorbic acid is oxidized by 30.0 mL of titrant? 492 mg What percent of the US RDA (60. mg) is this?
Answers
30.0 mL of titrant oxidizes approximately 7.5% of the US RDA for ascorbic acid.
To find the amount of ascorbic acid oxidized by 30.0 mL of titrant, we can use the given concentration of the dcp solution, which titrates 0.15 mg of ascorbic acid per mL.
Amount of ascorbic acid oxidized = concentration of dcp solution × volume of titrant
= 0.15 mg/mL × 30.0 mL
= 4.5 mg
Therefore, 30.0 mL of titrant oxidizes 4.5 mg of ascorbic acid.
To calculate the percentage of the US Recommended Daily Allowance (RDA), we can use the formula:
Percentage = (Amount of ascorbic acid oxidized / RDA) × 100%
= (4.5 mg / 60 mg) × 100%
≈ 7.5%
Therefore, 30.0 mL of titrant oxidizes approximately 7.5% of the US RDA for ascorbic acid.
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4Al(s) + 30 (9) 2ALO3(s)
Assume that 92 grams of aluminum was reacted at a temperature of 25.0°C
at constant pressure and the reaction temperature rose to 31.41°C. The
specific heat of aluminum is 0.90 J/9°C.
-Calculate AT:
-Calculate change in heat in joules (J). Round to the nearest hundredth.
Answers
A satellite and a hockey puck are alike because they illustrate Newton's first law of motion.
True
False
Answers
Answer:
It would be True
Explanation:
Because they both have the same push of gravity. Gravity affects all objects equally. If you drop an egg and a watermelon at the same time they would both collide with the floor at the same time.
true or false: heat and pressure combine to form a volcanic eruption
Answers
Answer:
true hope that helps
Explanation:
How many atoms are in 4.1 grams of zinc?
Answers
Answer:
1 mole of zinc has 6.023 x 1023 atoms
So, 4.1 moles will have 4.1 x 6.023 x 1023 atoms = 24.694 x 1023 atoms
Explanation:
A 2.575 g piece of gold (specific heat = 0.129 J/g°C) at a temperature of 75°C is placed into cold water at 10°C. If the gold loses 10.0 J of energy, what is its final
temperature in the water? Enter your answer to the
nearest whole number of °C.
Answers
Answer:
The final temperature of the mixture is 44.9°C
Explanation:
Mass of the substance (gold) = 2.575g
Specific heat capacity of gold = 0.129J/g°C
Initial temperature (T1) = 75°C
Final temperature (T2) = ?
Energy lost = 10J
Heat energy(Q) = MC∇T
Q = heat energy (in this case lost)
M = mass of the substance
C = specific heat capacity of the substance
∇T = change in temperature of the substance = (T2 - T1)
Q = MC∇T
Q = MC(T2 - T1)
-10 = 2.575 × 0.129 × (T2 - 75) energy is -ve because it was energy lost.
-10 = 0.3321 × (T2 - 75)
-10 = 0.3321T2 - 24.9075
Collect like terms
0.3321T2 = 24.9075 - 10
0.3321T2 = 14.9075
T2 = 14.9075 / 0.3321
T2 = 44.88
T2 = 44.9°C
The final temperature of the mixture is 44.9°C
What is the ground state electron configuration for chloride ion?
Answers
The chloride ion's ground state electron configuration is [Ne] 3s2 3p6.
An atom of chlorine that has lost one electron and now has a net charge of -1 is known as a chloride ion.
The chloride ion contains 16 electrons overall due to the loss of one electron from the chlorine atom, which has 17 protons in its nucleus.
The chloride ion's atomic structure resembles that of a chlorine atom, but one electron from the 3s orbital is missing.
The chloride ion now has an electron configuration of [Ne] 3s2 3p6, with the 3s orbital having two electrons and the 3p orbital having six.
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when a catalyst is added to reactants, the reaction rate may increase or..
A: occur at a lower temperature
B: decrease
C: stay the same
Answers
Answer:
a
Explanation:
It increases the reaction rate by lowering the activation energy for a reaction