Mix the mixture with water, filter off the insoluble solids and evaporate the water to separate the soluble solids.
This gives a heterogeneous mixture, one with dissolved solids and one with undissolved solids, you can see two different phases
These two A simple filtration method can be used to separate the two phases.
Filtering the mixture yields a solution containing soluble solids, leaving the insoluble solids on the filter paper.
This will separate the two solids.
Water can be heated and evaporated to regenerate dissolved solids. This will return the original soluble solids.
So the only option consistent with this method is to "mix the mixture with water, filter off the insoluble solids, then evaporate the water to separate the soluble solids".
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What is the name of the chemical formula Cl3N8?
A. chlorine nonanitrogen
B. trichlorine octanitride
C. chlorine nitride
D. tetrachlorine octanitride
The name of the chemical formula; Cl₃N₈ is trichlorine octanitride (option B).
What is IUPAC?IUPAC is the acronym for international Union of pure and applied chemistry. IUPAC nomenclature of organic chemistry is a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry.
According to this IUPAC nomenclatural rules, the following applies:
Mono means oneDi means twoTri means threeTetra means fourPenta means fiveHexa means sixHepta means sevenOcta means eightAccording to this question, a compound with the following chemical formula is given; Cl₃N₈. This suggests that the name will be trichlorine octanitride.
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Read the text about an animal in motion.
A prairie dog was resting underground in its burrow when it heard other prairie
dogs running around above ground. The prairie dog left its burrow and ran
around on a flat field with the others. After a few minutes, it got hungry. So, it
stopped in a patch of grass to feed.
When was the least gravitational potential energy stored between the prairie dog and Earth?
Assume that the prairie dog's mass did not change.
when the prairie dog was resting in its burrow
when the prairie dog got hungry
when the prarie dog stopped in the grass
The of life on Earth is defined by gravity. It influences plant and animal growth and development by regulating the proliferation of their cmorphologyonstituent cells1. Gravity is also important in cellular function.
when the prairie dog stopped in the grass.
What are the motion of the animal?Translational motion (such as the movement of an animal's center of gravity) and rotational motion are both important for animals (like the swinging of a leg). Most animals have flexible bodies with articulated arms and legs that are joined to the body via joints.The morphology of life on Earth is defined by gravity. It influences plant and animal growth and development by regulating the proliferation of their constituent cells1. Gravity is also important in cellular function.On Earth, Newton's laws define the weight of a body (or any other object) as mass times gravitational acceleration (w = m * g). That is, the weight of an object is determined by the gravitational pull on it.To learn more about : morphology
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How many molecules are in 2.6 g of H2O
According to the solution is 8.671 x 10²³ molecules are in 2.6 g of H₂O.
What are molecules and examples?A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the substance's physical and chemical properties. Further atom division occurs within molecules. For example, the symbol for the oxygens and molecule are O and O2, etc.
Briefing:The two hydrogen atoms in one gram of water weigh 2 atomic units (au) while an oxygen atom weighs 16 au. Water therefore has a molar mass of 18 au. This indicates that 18 grams equal 1 mole of water.
1 mole = 18 grams
x moles = 2.6 grams
Therefore x = (2.6x1)/18 = 0.144 moles.
1 mole contains 6.022141 x 10²³ particles
We have 0.144 moles, so:
0.144 x 6.022141 x 10²³ = 8.671 x 10²³ molecules.
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A 9.96 g-sample of lithium chloride was dissolved in 100.0 mL of water at 22.2°C. When the salt was dissolved, the temperature of the solution was 41.3°C. Given the specific heat of solution of 4.18 J g^-1 °C-1 calculate the molar enthalpy of solution of lithium chloride. The density of water is 1.0 g/mL. Answer: -37.4 kJ/mol
The molar enthalpy of a lithium chloride solution containing 9.96 grams of lithium chloride dissolved in 100.0 milliliters of water at 22.2 degrees Celsius, rising to 41.3 degrees Celsius, is 34.0 kilojoules/mole.
The mass of water:
Density(D) = Mass(m) ÷ Volume(v)
1.00 g/ml = m÷100ml
m = 1.00g/ml × 100.0 ml
m = 100g
The amount of energy absorbed by water:
q = m × C × ΔT
q = 100g × 4.189J/g.°C × (41.3°C - 22.3°C)
q = 418 J/°C × 19.1°C
q = 7984J
q = 7.984kJ
The amount of energy absorbed by water is 7.984 kJ. The number of moles of lithium chloride has to be calculated. Then, the lithium chloride solution's molar enthalpy is calculated by dividing the energy absorbed by the lithium chloride solution by the number of moles of lithium chloride.
The molar mass of lithium chloride:
(Molar mass of lithium) + (Molar mass of chlorine)
(6.94g/mol) + (35.5g/mol)
42.4g/mol
The number of moles of lithium chloride:
Number of moles(n) = Mass(m) ÷ Molar Mass(M)
n = 9.96g ÷ (42.4g/mol)
n = 0.235 mol
The molar enthalpy of the lithium chloride solution:
Molar enthalpy = Energy absorbed(q) ÷ Moles of substances(n)
Molar enthalpy = 7.984kJ ÷ 0.235mol
Molar enthalpy = 34.0kJ/mol
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Liquid CleanersUV lightFumigationHeat/pressureVery effective, kills on allsurfaces. Expensive,V cannot be present whenthere, often requires someclean up.Easy to use, Cheap, greatfor flat surfaces, effective.Does not work well onvertical surfaces, can besmelly and require cleanup.Very Effective, Kills on allsurfaces, no clean upneeded. However, it takesa lot of time and cannotbe used on large objects.Easy, Cheap, great for flatsurfaces, no clean up. Noteffective in shadows,doesn't kill all microbes
Answer:
• Liquid cleaners,: Easy to use, Cheap, great for flat surfaces, effective. Does not work well on vertical surfaces, can be smelly and require clean up.
• UV light,: Very Effective, Kills on all surfaces, no clean up needed. However, it takes a lot of time and cannot be used on large objects.
• Fumigation,: Very effective, kills on all surfaces. Expensive, V cannot be present when there, often requires some clean up.
• Heat/pressure,: Easy, Cheap, great for flat surfaces, no clean up. Not effective in shadows, doesn't kill all microbes.
Explanation:
• Liquid cleaners,: it can slip down vertical surfaces and not have enough contact time to be able to fulfill its function.
,• UV light,: as UV light cleaning is normally done in closed chambers, it is not useful for large objects.
,• Fumigation,: in this case, concentrated chemicals are usually used, so it is very important not to be present during the fumigation.
,• Heat/pressure,: it is an economical method, because normally, pressurized hot water is used.
what is the mass in grams of 1.71 x 10^34 molecules of ketamine?
The mass of ketamine is 66.56 ×[tex]10^{11}[/tex] g.
Number of mole = Avogadro number / number of molecules
Avogadro number = 6.02 × [tex]10^{23}[/tex]
Number of molecules = 1.71 ×[tex]10^{34}[/tex]
Number of mole = 1.71 ×[tex]10^{34}[/tex] / 6.02 × [tex]10^{23}[/tex] = 0.28 ×[tex]10^{11}[/tex]
Number of mole = given mass / molar mass
Molar mass of ketamine = 237.72 g
Number of mole = 0.28 ×[tex]10^{11}[/tex]
Hence, given mass = Number of mole × molar mass
Given mass = 0.28 ×[tex]10^{11}[/tex] × 237.72 g
Given mass = 66.56 ×[tex]10^{11}[/tex] g
So, the mass of ketamine is 66.56 ×[tex]10^{11}[/tex] g.
Avogadro number is number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles.
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Part 1: Looking at the diagram above, what can you tell me about the type of reaction it is? Is this exothermic or endothermic? How do you know? Make sure you support your answer by using the diagram.
Exothermic reaction
ExplanationsThe given diagram is the diagram showing the change in the heat of the reaction of a substance.
If the enthalpy change is negative, the reaction is exothermic showing that the heat is given out to the surroundings but the enthalpy change is positive, the reaction is exothermic showing that the heat is absorbed from the surrounding.
From the diagram, the energy of the product is C while the energy of the reactant is A.. Since the energy of the product is lower than that of the reactant, hence the change of enthalpy will be expressed as:
[tex]\triangle H=C-A<0:\text{ }\triangle H=-ve[/tex]Since the enthalpy change is negative, the reaction is exothermic showing that the heat is given out to the surroundings.
Calculate the pressure (in atm) of a 3.30 mol sample of ammonia gas at 350.0 K in a 3.00 L container using the van der Waals equation. For ammonia, a = 4.17 L2 atm/mol² and b = 0.03712 L/mol.
The pressure (in atm) of a 3.30 mol sample of ammonia gas at 350.0 K in a 3.00 L container using the van der Waals equation is 89.66 atm.
Given that :
n = 3.30 mol
Volume V = 3.00 L
Temperature T = 350.0 K
for ammonia :
a = 4.17 L²atm/mol²
b = 0.03712 L/ mol
Vander waals equation is given as :
( P + an²/V²) ( V - nb ) = nRT
(P + 4.17 × ( 3.30 )² / 3² = 3.30 × 0.082 × 350
P + 5.045 = 94.71
P = 89.66 atm
Thus, The pressure (in atm) of a 3.30 mol sample of ammonia gas at 350.0 K in a 3.00 L container using the van der Waals equation is 89.66 atm.
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12
32. How many grams of ice at 0°C can be melted by the condensation of 12.39 g of steam at 100°C,
assuming a complete transfer of thermal energy?
Number 32
Mass of ice that will produce by ice at 0°C which can be melted by the condensation of 12.39 g of steam at 100°C, will be 16.1 grams
How to find mass of ice?A body's mass is always constant. Mass can be calculated in one of two ways: mass = volume density. The gravitational force acting on a mass is measured by weight. "Kilogram" is the SI unit of mass.
We know, that
Q = mcΔT
Heat gained by the ice = Heat loss by the steam
Mass of ice = m
Specific heat of ice (c) = 2.093 kg/kg- k
T= 293k
Mass of steam = 12.399
0.0129
Specific heat of vapor = 1.996 kJ/kg k
T = 393k
Now,
m*2.093*273 = 0.01239*1.996*373
m = 0.01239*1.996*373/2.093*273
Mass of ice in grams = 0.0161*1000
Mass of ice = 16.1 grams
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what element is this
Answer:
looking at it,it should be oxygen or Nitrogen.
five ways through which plant diseases are spread
HELP ME ASAP ALCHEMY CHEMISTRY: pray:
The symbol, name, atomic number, mass number, charge, number of protons, number of neutrons, and number of electrons of the given atoms are as follows:
2.
symbol: ⁶⁰₂₉Cuname: Copper-60atomic number: 29mass number: 60charge: 0number of protons: 29number of neutrons: 31number of electrons: 293.
symbol: ¹⁹⁸₇₉Auname: Gold-198atomic number: 79mass number: 198charge: +1number of protons: 79number of neutrons: 119number of electrons: 784.
symbol: ¹⁹₉Fname: Fluorine-19atomic number: 9mass number: 19charge: -1number of protons: 9number of neutrons: 10number of electrons: 105.
symbol: ²³⁸₉₂Uname: uranium-238atomic number: 92mass number: 238charge: 0number of protons: 92number of neutrons: 146number of electrons: 926.
symbol: ¹⁴₆Cname: Carbon-14atomic number: 6mass number: 14charge: 0number of protons: 6number of neutrons: 8number of electrons: 6What is the atomic number of an element?The atomic number of an element is the number of protons in the nucleus of an atom.
For a neutral atom, the number of protons is equal to the number of electrons.
For a negatively-charged atom, the number of electrons is greater than the proton number by the size of the charge on the atom.
For a positively-charged atom, the number of electrons is less than the proton number by the size of the charge on the atom.
The mass number is the sum of the proton and neutron in the nucleus. Hence, the neutron number is the difference between the mass number and the atomic number.
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193 ml of oxygen o2 was collected over water on a day when the atmospheric pressure was 762.0mmHg. The temperature of the water was 23.0C.
The mass of the oxygen that is collected is 0.25 g.
What mass of oxygen was collected?From the question, we have the following information;
pressure of the gas = 762.0mmHg
Vapor pressure of the gas = 21.1mmHg
temperature of the gas = 23.0C or 296 K
Volume of the gas = 193 ml or 0.193 L
We know that the pressure of the oxygen gas is now going to be the volume of the gas minus the vapor pressure at that temperature.
We now have;
762.0mmHg - 21.1mmHg = 740.9 mmHg or 0.97 atm
Now we have;
PV = nRT
n = PV/RT
n = 0.97 atm * 0.193 L/ 0.082 atmLK-1mol-1 * 296 K
n = 0.187/24.3
n = 0.0077 moles
Mass of the oxygen = 0.0077 moles * 32 g/mol = 0.25 g
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Missing parts;
193 mL of O2 gas was collected over water on a day where the atmospheric pressure was 762mmHg. The temperature of the water was 23.0 C, and the vapor pressure of water at this temperature was 21.1mmHg. What is the mass in grams of the oxygen collected?
what is Keq for the reaction N2+3H2 = 2NH3 if the equilibrium concentrations are NH3 = 3 M, N2 = 1 M, H2 = 2 M
The ammonia formation has been 1.125 mol/L.
Keq is defined as the ratio of the mathematical product of the equilibrium concentrations of the species on the right that is multiplied by the concentrations of the chemical products divided by the mathematical product of the equilibrium concentrations of the species on the left.
This is the reaction that makes ammonia from hydrogen and nitrogen. Only one product is produced in this reaction. This reaction is therefore known as a binding reaction. A small Keq Keq < 1 implies a large concentration of reactants at equilibrium. In this case, the reaction drives the formation of reactants. If Keq ≈ 1 it means that there is a significant amount of reactants and products in equilibrium.
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Keq is equal to the number 4.5
Balance this redox reaction. Assume a basic solution. Show your work.
Cl- + MnO4- --> MnO2 + ClO3-
The balanced chemical equation is
[tex]\rm Cl^- + 2MnO^4^ \rightarrow 2MnO_2 + ClO^3^-[/tex]
What is chemical equation?Chemical equation is defined as a chemical reaction's symbolic representation in the form of symbols and chemical formulas.
It can also be defined as a chemical reaction mathematical expression that represents the product formation from the reactants.
Balanced chemical equation is defined as an equation with the same number of atoms of each type in the reaction on both the reactant and product sides.
It can also be defined as stoichiometric coefficients are added to the reactants and products.
Thus, the balanced chemical equation is
[tex]\rm Cl^- + 2MnO^4^ \rightarrow 2MnO_2 + ClO^3^-[/tex]
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You are writing a safety contract for your class. List 10 things you would include in the contract.
Writing a safety contract for your class. List 10 things you would include in the contract are
1) students should always listen to teachers.
2) In case you see fire in school you should tell to your teacher.
3) No eating in between class.
4) No student may work in laboratory without teachers.
5) wear eyeglasses when need in class.
6) Proceed with cautions in lab.
7) Student should always wear a proper safety material.
8) Tie your hair in tight ponytail or make braid.
9) Work with chemicals by takin precaution do not play with it.
10) Carry sharp instrument with tip down away.
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7. When solid carbon reacts with oxygen gas to produce carbon dioxide gas, woul the triangle H value be on the reactant or product side of the equation?
When solid carbon reacts with oxygen gas to produce carbon dioxide gas. the deltaH (enthalpy change ) value is negative .DeltaH would be on the product side of the equation.
What is enthalpy change?In a thermodynamic system, energy is measured by enthalpy. Enthalpy is a measure of a system's overall heat content and is equal to the system's internal energy plus the sum of its volume and pressure.
Knowing whether q is endothermic or exothermic allows one to characterise the relationship between q and H. An endothermic reaction is one that absorbs heat and demonstrates that heat from the environment is used in the reaction, hence q>0 (positive). For the aforementioned equation, under constant pressure and temperature, if q is positive, then H will also be positive. In a similar manner, heat is transferred to the environment when it is released during an exothermic reaction. Thus, q=0 (negative). Therefore, if q is negative, H will also be negative.
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Each dime has a mass of 2.268 g. How much would the stack of 277778 dimes weigh
Which action is the best example of direct observation?
Answer:
meaning
Explanation:
repeat yourself please and be specific
Question 1What is the mass of 11.52mol of particles ofCalcium Chloride (CaCl₂)? (Round any atomicmass from the periodic table to one decimal
Explanation:
First let's find the molar mass of CaCl2:
Ca = 40.1 g/mol
Cl = 35.5 g/mol
40.1 + (35.5*2) = 111.1 g/mol
So:
111.1 g ---- 1 mol
x g ---- 11.52 mol
x = 1,279.872 g
Answer: 1,279.9 g
What mass of glycerin (C3H8O3) must be dissolved in 169.8 g water to give a solution with a freezing point of -3.81°C? Kf for water = 1.86°C*kg/mol.
Please give explanation...
It is necessary to add 2.67 grams of glycerin to 169.8 grams of water in order to produce a solution that has a freezing point that is 3.81 degrees below zero.
This is further explained below.
What is glycerin?Generally, The freezing point of water will drop as a result of the addition of glycerin to the water.
The term "Depression in Freezing Point" has been given to describe this phenomenon. This kind of attribute is known as a colligative property.
By using the formula, we are able to calculate the decrease in the freezing point,
dT = i.m.K
dT = 0-(-3.81) °C
dT = 3.81 °C.
Generally, the equation for the Molarity is mathematically given as
m = W/92 x 0.1698
Therefore
[tex]3.81 = \frac{1.86 x W}{(92 x 0.1698}\\\\W = \frac{3.81 x 92 x .01698 }{1.86}[/tex]
W = 2.67 grams.
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What is the mass (in grams) of 1.45 mol BaBr2?
Please include how to get answer if possible.
According to the mole concept, the mass in grams of 1.45 mole of barium bromide is 430.853 g.
What is mole concept?Mole concept is a concept according to which mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Number of moles is calculated by the formula, :mass/molar mass
So for the given problem mass=number of moles×molar mass
=1.45×297.14=430.853 g
Hence, 430.853 g is the mass of 1.45 moles of barium bromide.
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According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another?
1. The volume and the shape stay the same.
2. The volume increases to fill the new container, but the shape stays the same.
3. The volume stays the same, but the shape changes to fit the new container.
4. The volume and the shape change to fill the new container.
According to the kinetic-molecular theory, if a liquid is transferred from one container to another, the volume stays the same, but the shape changes to fit the new container.
What is the kinetic-molecular theory?The kinetic theory of gases is a simple, historically significant classical model of the thermodynamic behavior of gases, with which many principal concepts of thermodynamics were established.
The kinetic-molecular theory is based on some assumptions which includes:
Gases are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion.These particles move in a straight line until they collide with another particle or the walls of the container.These particles are much smaller than the distance between particles. Most of the volume of a gas is therefore empty space.Learn mote about the kinetic-molecular theory at: https://brainly.com/question/134712
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4. A gas occupies 8.7L at a temperature of 29.0°c. What is thevolume at 133°C? (Charles Law)
Step 1
Charles' law states that the volume of an ideal gas is directly proportional to the absolute temperature at constant pressure.
Mathematically:
V1/T1 = V2/T2 (1)
V = volume in L
T = temperature in K
----------------
Step 2
Data provided:
V1 = 8.7 L
T1 = 29.0 °C + 273 = 302 K
-----
V2 = unknown
T2 = 133 °C + 273 = 406 K
----------------
Step 3
V2 is cleared from (1):
V1/T1 x T2 = V2 = 8.7 L/302 K x 406 K = 11.7 L approx.
Answer: V2 = 11.7 L
circle the meaning of the word in italics.
1. damp - (very wet, slightly wet, soaked, dripping.)
2. stain - ( embroidery, smear, mend, hole)
3. scrub - ( bleach, fold, sprinkle rub)
4. rust - stain form (plastic, leaf, iron, wood)
5. bleach - expose under the ( sun, fire, lamp, iron)
Answer:
1- damp
meaning: slightly wet
2-stain
meaning: smear
3-scrub
meaning: rub
4-rust
meaning: stain form iron
5-bleach
meaning: expose under the sun
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Which statement could be used as a testable hypothesis for a scientificexperiment?A. If you put a cricket in water, it will be too scared to chirp.B. Does humidity affect how rapidly crickets chirp?C. Crickets are more annoying at night than during the day.OD. If the temperature decreases, then crickets will chirp less.
Answer
D. If the temperature decreases, then crickets will chirp less.
Explanation
A hypothesis is a testable guess about the relationship between two or more variables. As the temperature rises, it becomes easier to reach a certain activation energy, thereby allowing chemical reactions, such as the ones that allow a cricket to chirp, to occur more rapidly. Conversely, as the temperature falls, the reaction rates slow, causing the chirping to diminish along with it. Therefore the above statem
Mr. Smith is flying from China to Germany. It takes 7 hours to make the 8744 m trip. What is his velocity? Give your answer in km/h.
heelp
The velocity of Mr. Smith is 1.249km/h or 1.25km/h
Here we are asked to calculate the velocity of Mr. Smith. To calculate, we will use the formula of velocity.
Velocity(V)= Displacement(S) / time(T)
Time= 7 hours
Displacement= 8744 m
As you want the answer in km/h, we need to change the distance in meters to kilometers
1000m=1km
Therefore 8744m/1000= 8.744km
Now putting these in the formula above, we get
V=8.744/7
V=1.249 km/h or 1.25km/h
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The activation energy for a reaction is the energy difference between what two components of a reaction?
ANSWER
Reactant and intermediate
EXPLANATION
Activation energy is the minimum energy required to activate a chemical reaction
Activated energy is the difference between the reactants and the intermediate
Therefore, the correct answer is option Dm
What word describes an investigation by the same students which gives similar results each time
Answer:
paiwnwom0sjsnenwksksjnssisn
Explanation:
d ko alam
How many moles of sucroseare in 5.25x1029 sucrosemolecules?[?]x10[?]Enter your answer with the correctnumber of significant figures and be surethe prefix is a number between 1 and 10!Prefix (green)Exponent (yellow)Enter
To calculate the number of moles we will use Avogadro's number, which relates the number of molecules contained in a mole of any substance, the relationship between moles and molecules is as follows:
[tex]\begin{gathered} \text{Moles of a subtances=Molecules}\times\frac{1mol}{6.02\times10^{23}molecules} \\ \text{Moles of sucrose=}5.25\times10^{29}molecules\times\frac{1mol}{6.02\times10^{23}molecules} \\ \text{Moles of sucrose=}8.72\times10^5mol \end{gathered}[/tex]In the statement we are given the molecules with 3 significant figures, therefore the answer must also have 3 significant figures. So the answer will be: In 5.25x10^29molecules are 8.72x10^5 mol of sucrose
