Answers
Answer:
a heterogeneous mixture
Explanation:
an example would be sand and water because it can be filtered which is a physical mean of separation.
Answer:
Heterogeneous mixtures
Explanation:
It is composed of two or more types of matter that can be present in varying amounts and can be separated by physical means. Heterogeneous mixtures vary in composition from point to point; homogeneous mixtures have the same composition from point to point.
Related Questions
state two applications of simple distillation of separating mixture
Answers
Answer:
Purify drinking water of unwanted
chemicals andminerals such as salt.Hope this helps! :D
A 28.3 mL sample of a solution of RbOH is
meutralized by 21.91 mL of a 1.205 M solution
of HBr. What is the molarity of the RbOH
solution?
Answer in units of M.
LO
*
17 * I
a
*
C
Answers
To answer this question, we need to know the concentration of the RbOH solution. Without this information, we cannot determine the amount of RbOH present in the 28.3 mL sample.
However, if we assume that the concentration of the RbOH solution is known, we can use the formula:
moles of solute = concentration x volume
To find the number of moles of RbOH in the 28.3 mL sample. From there, we can use the molar mass of RbOH (102.47 g/mol) to calculate the mass of RbOH in the sample.
For example, if the concentration of the RbOH solution is 0.1 M, then:
moles of RbOH = 0.1 M x 0.0283 L = 0.00283 moles
mass of RbOH = 0.00283 moles x 102.47 g/mol = 0.290 g
So, a 28.3 mL sample of a 0.1 M RbOH solution would contain 0.290 g of RbOH.
In summary, the amount of RbOH present in a 28.3 mL sample of a solution depends on the concentration of the solution. Without knowing the concentration, we cannot determine the amount of RbOH in the sample.
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mc016-1
Which represents the correct mass-volume relationship at STP?
32.00 g of O2 react with an excess of H2 to produce (2 ´ 22.4) L of H2O.
2.00 g of H2 react with an excess of O2 to produce (2 ´ 22.4) L of H2O.
32.00 g of O2 react with an excess of H2 to produce 22.4 L of H2O.
(2 ´ 2.00) g of H2 react with an excess of O2 to produce 22.4 L of H2O.
Answers
The correct mass-volume relationship at STP is A. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\)
To determine the correct mass-volume relationship at STP (Standard Temperature and Pressure), we need to consider the stoichiometry of the balanced chemical equation, the molar masses of the substances involved, and the molar volume of gases at STP.
The balanced equation indicates that 2 moles of \(H_{2}\) react with 1 mole of \(O_{2}\) to produce 2 moles of \(H_{2}O\). At STP, 1 mole of any gas occupies 22.4 liters.
In option A, it states that 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 × 22.4) L of \(H_{2}O\). The molar mass of \(O_{2}\) is 32.00 g/mol, which corresponds to 1 mole of \(O_{2}\). According to the balanced equation, 1 mole of \(O_{2}\) reacts to form 2 moles of \(H_{2}O\). Therefore, the given mass of \(O_{2}\) (32.00 g) corresponds to 1 mole of \(O_{2}\), which will produce 2 moles of \(H_{2}O\).
Since 1 mole of any gas occupies 22.4 L at STP, 2 moles of \(H_{2}O\) would occupy (2 × 22.4) L, which is equal to 44.8 L. Hence, the correct answer is A, where 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 × 22.4) L of \(H_{2}O\). This choice represents the correct mass-volume relationship at STP based on the given equation and stoichiometry. Therefore, Option A is correct.
The question was incomplete. find the full content below:
Consider the equation. 2\(H_{2}\)(g) + \(O_{2}\)(g) >>>> 2\(H_{2}O\)(g)
Which represents the correct mass-volume relationship at STP?
A. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\)B. 2.00 g of \(H_{2}\) react with an excess of \(O_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\).
C. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce 22.4 L of \(H_{2}O\)
D. (2 ´ 2.00) g of \(H_{2}\) react with an excess of \(O_{2}\) to produce 22.4 L of \(H_{2}O\).
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In which food or drink are the particles most likely moving the fastest? Answers they gave to us: popsicle, cheese, a drink, Coffee. Please help me please i will give you a 5 star.
Answers
Answer:
Coffee
Explanation: When a liquid is warm the particles move faster
Draw the two enantiomers that are obtained upon bromination of (S)-3-methylhexane.
Answers
Radical bromination of (S)-3-methylhexane results in 3-bromo-3-methylhexane as the main byproduct, which is optically inactive. The branching hydrocarbon 3-methylhexane has two enantiomers. It belongs to the family of heptane isomers.
One of heptane's two structural isomers, 2,3-dimethylpentane, and this particular molecule both possess the chirality property. They are (R)-3 methylhexane and (S)-3 methylhexane, respectively. Bromomethane is the natural product. This is a substitution process because one of the hydrogen atoms in the methane has been swapped out for a bromine atom. Enantiomers are stereoisomers that cannot be superimposed mirror images of one another. Depending on how each stereocenter is set up, enantiomers are different. In terms of handedness, they can be compared to gloves for the right or left hand.
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it process information and sends instruction? A. brain B. kidney C. heart D. lungs
Answers
Answer:
A. brain
Explanation:
every instruction to us is sent by brain
Answer:
A. Brain
Explanation:
It assembles the messages in a way that has meaning for us, and can store that information in our memory.
Given the following equation: C2H60 + 302 + 3H2O + 2CO2
If 2.0 moles of CO2 were produced, how many moles of O2
reacted?
Answers
Answer:
3moles
Explanation:
relation taken from balanced equation
Give the complete ionic equation for the reaction that occurs when aqueous solutions of sodium sulfide and iron(II) nitrate are mixed.
Answers
Answer:
2 Na⁺(aq) + S²⁻(aq) + Fe²⁺(aq) + 2 NO₃⁻(aq) ⇒ FeS(s) + 2 Na⁺(aq) + 2 NO₃⁻(aq)
Explanation:
Let's consider the molecular equation that occurs when aqueous solutions of sodium sulfide and iron(II) nitrate are mixed.
Na₂S(aq) + Fe(NO₃)₂ ⇒ FeS(s) + 2 NaNO₃(aq)
The complete ionic equation includes all the ions and the species that do not dissociate in water.
2 Na⁺(aq) + S²⁻(aq) + Fe²⁺(aq) + 2 NO₃⁻(aq) ⇒ FeS(s) + 2 Na⁺(aq) + 2 NO₃⁻(aq)
The complete ionic equation for the reaction between aqueous solution of sodium sulfide and iron(II) nitrate is
2Na⁺(aq) + S²⁻(aq) + Fe²⁺(aq) + 2NO₃⁻(aq) —> FeS(s) + 2Na⁺(aq) + 2NO₃⁻(aq)
The complete ionic equation for the reaction between aqueous solution of sodium sulfide and iron(II) nitrate can be written as follow:
In solution, Na₂S and Fe(NO₃)₂ will dissociate as follow:
Na₂S(aq) —> 2Na⁺(aq) + S²¯(aq)
Fe(NO₃)₂(aq) —> Fe²⁺(aq) + 2NO₃¯(aq)
The reaction will proceeds as illustrated below to give the complete ionic equation:
Na₂S(aq) + Fe(NO₃)₂(aq)—>
2Na⁺(aq) + S²¯(aq) + Fe²⁺(aq) + 2NO₃¯(aq) —> FeS(s) + 2Na⁺(aq) + 2NO₃¯(aq)
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Describe the advantages of the hydrogen-rich fuel cell when compared to the conventional electrochemical cells such as lead-acid battery. (4)
Answers
The hydrogen-rich fuel cell offers advantages in terms of efficiency, environmental impact, operating time, refueling speed, weight, size, and lifespan when compared to conventional electrochemical cells like the lead-acid battery.
The hydrogen-rich fuel cell offers several advantages over conventional electrochemical cells like the lead-acid battery. Here are some of the key advantages:
1. Higher Efficiency: Hydrogen fuel cells have higher energy conversion efficiencies compared to lead-acid batteries. Fuel cells can convert chemical energy directly into electrical energy with minimal loss, while lead-acid batteries have inherent energy losses due to factors such as internal resistance and heat dissipation.
2. Clean and Environmentally Friendly: Hydrogen fuel cells produce electricity through the reaction of hydrogen and oxygen, with water being the only byproduct. They do not produce harmful emissions or contribute to air pollution, making them a cleaner and more sustainable power source compared to lead-acid batteries, which require the use of chemicals like sulfuric acid.
3. Longer Operating Time: Fuel cells have longer operating times compared to lead-acid batteries. Lead-acid batteries have a limited capacity and need to be recharged frequently, while fuel cells can continuously generate electricity as long as there is a supply of hydrogen.
4. Faster Refueling: Refueling a fuel cell is faster compared to recharging a lead-acid battery. Fuel cells can be refueled by replenishing the hydrogen supply, which can be done relatively quickly. In contrast, lead-acid batteries require a longer time to recharge, typically hours, depending on the battery's capacity and charging rate.
5. Lighter Weight and Compact Size: Hydrogen fuel cells have a higher energy density compared to lead-acid batteries, meaning they can store more energy in a smaller and lighter package. This makes fuel cells more suitable for applications where weight and space are critical, such as in portable devices or electric vehicles.
6. Longer Lifespan: Fuel cells generally have a longer lifespan compared to lead-acid batteries. Lead-acid batteries can experience degradation over time due to factors like sulfation, which can reduce their overall capacity and lifespan. Fuel cells, on the other hand, can provide consistent performance over an extended period with proper maintenance.
These advantages make fuel cells a promising technology for various applications, including transportation, stationary power generation, and portable electronics.
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Which statement is true about the electric field?
Question 3 options:
The field points away from positive charges and toward negative charges.
The strength of the field increases proportional to the charge that creates it.
The strength of the field decreases proportional to the square of the distance from the charge.
All of the above
Answers
The half-life of a radioactive isotope is 27 years. How long will its
mass take to fall from 2.00 g to 0.25 g?
years.
Answers
Life will come out to be 10 days. This is the required value of half life.
what is radioactive isotope?
An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radioisotopes may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment. Also called radionuclide. Radioactive isotopes have many useful applications. In medicine, for example, cobalt-60 is extensively employed as a radiation source to arrest the development of cancer. Other radioactive isotopes are used as tracers for diagnostic purposes as well as in research on metabolic processes.Atoms of the same element with different numbers of neutrons are called isotopes. Many elements have one or more isotopes that are radioactive. Their nuclei are unstable, so they break down, or decay, and emit radiation.To learn more about isotope refers to:
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Consider the sodium borohydride reduction of camphor to isoborneol. A reaction was performed in which 1.000 g of camphor was reduced by an excess of sodium borohydride to make 0.661 g of isoborneol. Calculate the theoretical yield and percent yield for this reaction.
Answers
Answer:
m = 1.0164 g
% = 65.03%
Explanation:
First of all, we need to write the chemical reaction that is taking place here. We have the camphor being reduced to isoborneol:
C₁₀H₁₆O + NaBH₄ -----------> C₁₀H₁₈O + NaBH₂
We have a 1:1 mole ratio between Camphor and isoborneol, so, the moles of the camphor will be the same moles produced of isoborneol.
To get the theorical yield we need to calculate the theorical moles produced of isoborneol, then, the mass and compare it to the given mass. In that way we will get the %yield.
The Molar mass of camphor and isoborneol are:
MM C₁₀H₁₆O = (16*1) + (12*10) + 16 = 152 g/mol
MM C₁₀H₁₈O = (18*1) + (12*10) + 16 = 154 g/mol
The moles of camphor will be:
molesC₁₀H₁₆O = 1 / 152 = 0.0066 moles
The mass produced then of isoborneol should be:
mC₁₀H₁₈O = 0.0066 * 154
mC₁₀H₁₈O = 1.0164 gNow, the %yield would be:
% = (0.661 / 1.0164) * 100
% = 65.03%Hope this helps
Calculate the equilibrium constant Kp for this reaction, given the following information (at 295 K ):
2NO(g)+Br2(g)⇌2NOBr(g) Kc=2.1
2NO(g)⇌N2(g)+O2(g) Kc=2.3×1030
Answers
The equilibrium constant Kp for this reaction is 1.03×10^(-5) atm.
What is equilibrium constant?
The equilibrium constant, represented by K, is a quantitative measurement of the extent to which a chemical reaction has reached equilibrium. It describes the ratio of the concentrations (or partial pressures) of the products and reactants at equilibrium, with each concentration raised to a power equal to its coefficient in the balanced chemical equation.
We can use the relationship between Kp and Kc to solve this problem:
Kp = Kc(RT)^(Δn)
where R is the gas constant, T is the temperature in Kelvin, and Δn is the change in the number of moles of gas between the products and the reactants.
First, let's find Δn:
Δn = (moles of gas in products) - (moles of gas in reactants)
Δn = (2 moles) - (3 moles)
Δn = -1
Next, we can plug in the values and solve:
Kp = Kc(RT)^(-1)
Kp = (2.1)((0.0821 L·atm/mol·K)(295 K))^(-1)
Kp = 1.03×10^(-5) atm
Therefore, the equilibrium constant Kp for this reaction is 1.03×10^(-5) atm.
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305.79 of 0₂ burned with C₂H6 How many
moles of CO2
Answers
Answer:
The amount of CO₂ produced can be calculated using the mole ratio of CO₂ to C₂H6:
2 mol CO₂ / 1 mol C₂H6 = x mol CO₂ / 1.01 mol C₂H6
x = 2 mol CO₂ / 1 mol C₂H6 × 1.01 mol C₂H6 = 2.02 mol CO₂
Therefore, 2.02 moles of CO₂ were produced.
6) Name the following compounds
a. S2Cl3
B.KNO3
C.NH4Br
Answers
The name of the three compounds are Disulfur Dichloride, Potassium nitrate and Ammonium bromide respectively.
What are the names of the given compounds?1. The name of the first compound is Disulfur Dichloride.
Disulfur Dichloride is a type of inorganic compound comprise of sulfur and chlorine. There are also many other names which we can be used like sulfur monochloride, disulphur dichloride and sulphur monochloride. It is used to show C-S bonds.
2. The name of the second compound is Potassium nitrate.
Potassium nitrate is a compound that belong to the alkali metal nitrate. Potassium nitrate is also known as Indian saltpetre. The potassium nitrate is present in the nature but in the form of mineral. The potassium nitrate is used for making the explosives, matches, rocket fuel and fireworks.
3.The name of the third compound is Ammonium bromide.
Ammonium bromide is a type of compound that contains ammonium salt of hydrobromic acid. It can melt easy on providing heat. It is also soluble in water. It gives yellow colour. Ammonium bromide is the weak acid.
So we can conclude that the name of the three compounds are Disulfur Dichloride, Potassium nitrate and Ammonium bromide respectively.
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Is this right? How to write potassium chloride plus sodium chloride?
Answers
At 80 degrees C, which substance reaches saturation at 49 grams of solute per 100 grams of water?
Answers
Explanation:
At 80 degrees, all the solutes have not reached their saturation levels per 100 grams of water except for NaCl which is approximately at its saturation levels per 100 grams of water. Therefore, NaCl reaches saturation at 39 grams of water.
Answer:
No solute reaches saturation at 49 grams of watwer
Which of these is an abiotic resource? *
O Compost
O Grass
Sunlight
O ox
Answers
Answer:
Option (C) Sunlight
Explanation:
Abiotic factors refer to non-living physical and chemical elements in the ecosystem. Abiotic resources are usually obtained from the lithosphere, atmosphere, and hydrosphere.
3.604m + 104.29m + 3.1m + 17.41m. The sum expressed in the correct number of significant figures is
Answers
Answer:
128.4 m
Explanation:
3.604m + 104.29m + 3.1m + 17.41m
Add all the values
= 128.404 m
The significant figure rule for addition is for the sum to have the same number of decimal places as the value with the least number of decimal places. In the addition sentence 3.604m + 104.29m + 3.1m + 17.41m, the value with the least number of decimal places is 3.1, which has 1 decimal place. Therefore, we round our sum so that it also has 1 decimal place.
128.404 m
= 128.4 m
I hope this helps!
How many electrons and protons does the sodium ion have 11 protons and 11 electrons
Answers
Answer:
A sodium ion Na+ contains 10 electrons, 11 protons, and 12 neutrons.
Explanation:
solid magnesium aqueous hydrochloric acid aqueous magnesium chloride hydrogen gas balanced equation
Answers
Answer:
Mg (s) + 2 HCl (aq) → MgCl 2 (aq) + H 2 (g)
Explanation:
how many grams were dissolved to make 2.0 L of a 0.4 M KNO3 solution
Answers
Answer:80.8g
Explanation:
= . / ()
7.5 L of a gas at 2 ATM and a temperature of 75°C is changed and volume to 3.4 L and a pressure of .5 ATM what is the new temperature
Answers
Answer:
Explanation:
Combined Gas Law
T2= T1P2V2/ (P1V1) = 348.15 X .5 X 3.4/(2 X 7.5) =39.46 K or -233.69C
The length is 3 meters, the width is 9 meters, and the height is 2 meters. What is the
volume?
5.
The length is 10 meters, the width is 4 meters, and the height is 7 meters. What is the
volume?
Answers
Answer:
3 x 9 x 2 = 54 meters
10 x 4 x 7 = 280 meters
Explanation:
Multiply the length, the width, and the height.
You can multiply them in any order to get the same different result. The formula for finding the volume of a rectangular prism is the following: Volume = Length * Height * Width, or V = L * H * W.
Answer:35 cubes with a length of 7 meters, height of 1 meter, and width of 5 meters.
What is the length of the figure?
✔ 7 m
What is the width?
✔ 5 m
What is the height?
✔ 1 m
What is the number of cubes?
✔ 35 cubes
What is the volume?
✔ 35 cubic meters
Explanation:
A liquid has rhe following properties : one-phase,colorless,boils it varying temperature. Which of the following BEST describes this liquid
A.Solution
B.substance
C.suspension
D. Coarse mixture
Answers
Answer:
Solution
Explanation:
In science, the solution is a homogeneous mixture of two or more pure substances in proportional concentrations that can be continually varied up to what has been called the solubilization limit. The word solution is usually applicable to the fluid subatomic particle, but gaseous formulations are conceivable.
moles of each product that would form as a result of the decomposition of aspirin
Answers
The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).
The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:
\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)
From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.
Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.
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Consider a saturated solution formed when 17.5 g of a solute dissolve in 28.3 g of a solvent, giving a total solution volume of 27.8 mL.
a. Express the solution concentration as a mass percent.
b. Express the solubility as grams of solute per 100 g of solvent.
c. Calculate the solution density in g/mL.
Answers
Answer:
a) 38.2 % mass
b) 61.8 g solute/100 g solvent
c) 1.65 g/mL
Explanation:
Given the data:
mass of solute = 17.5 g
mass of solvent= 28.3 g
total solution volume= 27.8 mL
a)- mass percent= mass of solute/mass of solution x 100
mass of solution = mass solute + mass solvent = 17.5 g + 28.3 g = 45.8 g
mass % = 17.5 g/45.8 g x 100 = 38.2 % mass
b)- solubility = grams of solute/ 100 g solvent
= 17.5 g x (100 g /28.3 g solvent) = 61.8 g solute/100 g solvent
c)- density = massof solution/total volumesolution = 45.8 g/27.8 mL = 1.65 g/mL
Two students prepared aqueous solutions of LiCl and measured the properties, as shown in the table above. Both students observed that the solid LiCl readily dissolved in H2O. The students drew particle diagrams to explain the changes in the enthalpy and entropy of dissolution for LiCl based on their results and observations. Based on this information, the better particle diagram was drawn by which student, and why is that diagram more accurate?
A) The better particle diagram was drawn by Student 1 because when LiCl dissolves in water, it dissociates into Li+ and Cl− ions causing an increase in entropy.
B) The better particle diagram was drawn by Student 1 because when LiCl dissolves in water, it dissociates into Li+ and Cl− ions indicating that the dissolution of LiCl is exothermic.
C) The better particle diagram was drawn by Student 2 because it shows that LiCl does not dissociate, resulting in a decrease in entropy for the dissolution of LiCl.
D) The better particle diagram was drawn by Student 2 because it shows that LiCl does not dissociate, resulting in an endothermic process for the dissolution of LiCl.
Answers
Answer:
Solubility
Explanation:
Solid LiCl dissolves in water because:
A. The Li+ ions are attracted to the oxygen atom (partially -ve charge) of water.
D. The Cl– ions are attracted to the hydrogen atom (partially +ve charge) of water.
The better particle diagram was drawn by Student 1 because when LiCl dissolves in water, it dissociates into Li+ and Cl− ions causing an increase in entropy. The correct option is option A.
What is solubility?The maximum amount of a material that may dissolve in another is known as its solubility. A saturated solution is created when a solvent can dissolve its maximum quantity of solute before reaching equilibrium.
A supersaturated solution results when extra solutes are dissolved past the equilibrium solubility limit under specific circumstances. More solute cannot raise the concentration in the solution past saturation or supersaturation. Instead, the extra solute begins to separate from the solution as a precipitate. The better particle diagram was drawn by Student 1 because when LiCl dissolves in water, it dissociates into Li+ and Cl− ions causing an increase in entropy.
Therefore, the correct option is option A.
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BRAINLIEST IF YOU GIVE ME A LEGIT ANSWER
Answers
Answer: its Important that the new cells have a copy of every chromosome so the process involves copying the chromosomes first and then carefully separating the copies to give each new cell a full set
Explanation:ye
Answer: In mitosis a cell divides to form two identical cells. It is important that the cells have a copy of every chromosome, so the process involves copying the chromosomes first and then carefully separating the copies to give each new cell a full set.
two uses of sodium carbonate
Answers
Sodium carbonate, also known as washing soda or soda ash, has a wide range of applications. Sodium carbonate can be naturally occurring or synthetically produced through various methods, including the Solvay process, which is the most common method of industrial production.
Sodium carbonate, also known as washing soda or soda ash, has many uses, including:
1) Cleaning agent: Sodium carbonate is an effective cleaning agent due to its alkaline nature. It is used in laundry detergents and household cleaners to remove stains and grease from clothes and surfaces.
2) Industrial applications: Sodium carbonate is used in a variety of industrial applications. It is used in the production of glass, pulp and paper, and soaps and detergents. It is also used as a water softener and pH regulator in chemical processes.
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