Answers
In a double replacement reaction, two metals will not combine with each other when products are formed because the metals form positive ions that do not attract.
The correct option is C.
What is a double replacement reaction?A double replacement reaction is a reaction in which there is an exchange of radicals between two compounds when a solution of the compounds is mixed together.
In a double replacement reaction, a precipitate is always formed when the two solutions of the compounds are mixed together.
During a double replacement reaction, the metallic ions exchange their negative radicals to form new compounds.
In accordance with the law of charges, similar charges do not attract each other, hence, the opposite ions of the metals and the negative radicals are attracted to each other.
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Related Questions
How much O2 could be produced from 2.59 g of KO2 and 4.56 g of CO2?
Answers
Answer:
This is a limiting reagent problem. the way to figure it out is to do the stoichiometry for each amount given, calculating the amount of Oxygen produced. The smallest amount is the answer because that reactant "ran out".
for KO2
2.49g KO2 x 1 mole KO2 x 3 mole O2 x 32.00 g O2 = 0.841 g O2
71.10 g KO2 4 mole KO2 1 mole O2
for CO2
4.44g CO2 x 1 mole CO2 x 3 mole O2 x 32.00g O2 = 4.84 g O2
44.01 g CO2 2 mole CO2 1 mole O2
Therefore the answer is 0.841g O2 since it is the smallest amount produced meaning KO2 is the limiting reagent.
How many mL of a 0.75 N KOH solution
should be added to a 500 mL flask to make
500 mL of a 0.300 M KOH solution?
Answers
The amount of volume of KOH solution that should be added to make 500mL of a 0.300M solution is 200mL.
How to calculate volume?The volume of a solution given the concentration can be calculated using the following expression;
CaVa = CbVb
Where;
Ca = initial concentrationVa = initial volumeCb = final concentrationVb = final volumeAccording to this question, we are to calculate how many mL of a 0.75 M OH solution that should be added to a 500 mL flask to make 500 mL of a 0.300 M KOH solution.
0.75 × Va = 500 × 0.3
0.75Va = 150
Va = 150/0.75
Va = 200mL
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6. Balance the reaction
PCIS + H₂O → H3PO4 + HCI
Answers
The balanced chemical equation for the reaction is:
PCl5 + H2O → H3PO4 + HCl
To balance this equation, we need to make sure that the number of atoms of each element is equal on both sides of the equation.
To do this, we can start by balancing the phosphorus (P) and chlorine (Cl) atoms. There is one P atom and five Cl atoms on the left side of the equation, and one P atom and one Cl atom on the right side of the equation. We can balance these by adding a coefficient of 5 in front of HCl:
PCl5 + H2O → H3PO4 + 5HCl
Now we have five Cl atoms on both sides of the equation. Next, we can balance the hydrogen (H) atoms. There are two H atoms on the left side of the equation and five H atoms on the right side of the equation. We can balance these by adding a coefficient of 2 in front of H2O:
PCl5 + 2H2O → H3PO4 + 5HCl
Now we have two H atoms on both sides of the equation. Finally, we can balance the oxygen (O) atoms. There are two O atoms on the left side of the equation and four O atoms on the right side of the equation. We can balance these by adding a coefficient of 2 in front of H3PO4:
PCl5 + 2H2O → 2H3PO4 + 5HCl
Therefore, to balance this reaction, we need to use this balanced chemical equation:
PCl5 + 2H2O → 2H3PO4 + 5HCl
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What is the engine that moves Earth's lithospheric plates?
A)Convection Currents from the Mantle
B)The Sun
C)The pounding of waves onto the shorelines
D)Earthquakes and Volcanoes
Answers
Is A fireplace poker glows red when you heat it in the fire a Chemical or
Physical change?
Answers
A fireplace poker glowing red when you heat it in the fire is referred to as a physical change.
What is Physical change?This change is a reversible one in the physical properties of a substance such as the size, color etc. Physical change doesn't alter or change the chemical composition of a substance and no new products are formed in this process.
A fireplace poker glowing red when you heat it in the fire doesn't change the composition and is reversible when allowed to cool down which is why physical change was chosen as the most appropriate choice.
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How do you figure this question out in CHEM 101?What is the mass in grams are in 5.32x10^22 molecules of CO2?
Answers
To answer this question, the first step is to convert the given number of molecules to moles using Avogadro's number:
\(5.32\times10^{22}molecules\cdot\frac{1molCO_2}{6.022\times10^{23}molecules}=0.088molCO_2\)Now, use the molecular weight of CO2 to find the mass of this amount of moles:
\(0.088molCO_2\cdot\frac{44g}{molCO_2}=3.872g\)The mass of 5.32x10^22 molecules of CO2 is 3.872g.
What is the molarity of Ca(NO3)2 in a solution resulting from mixing 150.0 mL of 0.200 M HNO3 with 150.0 mL of 0.0100 M Ca(OH)2
Answers
The molarity of the Ca(NO3)2 solution would be 0.005 M
First, let us look at the balanced equation of the reaction:
\(2HNO_3+Ca(OH)_2 ---> Ca(NO_3)_2+2H_2O\)
The mole ratio of HNO3 to Ca(OH)2 is 2:1.
Mole of HNO3 = molarity x volume
= 0.2 x 150/1000
= 0.03 mole
Mole of Ca(OH)2 = 0.01 x 150/1000
= 0.0015
Thus, there is no limiting or excess reactant.
Also from the equation, mole ratio of Ca(OH)2 to Ca(NO3)2 is 1:1. Hence, the mole of Ca(NO3)2 would also be 0.0015 mole.
The total volume of the resulting solution would be: 150 +150 = 300 mL
Thus, the molarity of the resulting Ca(NO3)2 would be:
Molarity = mole/volume
= 0.0015/0.3
= 0.005 M
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You kick a soccer ball with a mass of 1.8 kg, and it moves at a velocity of 15 m/s. What type of energy does it have and how much?
Answers
Answer:
27 energy
Explanation:
you just multiply each number
Which of these casting methods is the most popular, accounting for approx. 70% of all metal casting?
a. Sand casting
b. Shell casting
c. Investment casting
d. Lost foam casting
Answers
Sand casting, which makes up around 70% of all metal casting, is the most common casting technique. A design of the finished object is created in wood or metal and employed in the process of "sand casting,".
Casting techniques are a class of manufacturing procedures used to turn liquid materials like metal, plastic, or ceramics into solid things. The liquid substance is put into a mould and given time to harden and assume the contours of the hollow. Casting techniques come in a variety of forms, including sand casting, investment casting, die casting, shell casting, and lost foam casting. The kinds of materials that can be cast, the degree of accuracy and surface quality, and the complexity of the pieces that can be created are only a few of the distinctive characteristics that each casting technique has. The automobile, aerospace, and construction industries all use casting techniques extensively.
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What kind of energy transfers between molecules of touching substances during conduction
Answers
Answer:
heat energy
Explanation:
Conduction is the transfer of heat energy from one substance to another or within a substance.
Question 10
A particular reaction has a standard molar reaction enthalpy of
−
4362
kJ mol
−
1
−4362 kJ mol
−1
and a standard molar reaction entropy of
+
21.6
J K
−
1
mol
−
1
+21.6 J K
−1
mol
−1
both at
298
K
298 K. What is the thermodynamic equilibrium constant for the reaction at
298
K
298 K? (Note, rounding errors will have a profound effect of
the value calculated.)
Answers
Answer:use chatgpt
Explanation:it works
At 298 K, the thermodynamic equilibrium constant for the reaction is approximately 1.23 × 10^7.
To calculate the thermodynamic equilibrium constant (K) for the reaction at 298 K, we can use the equation:
ΔG° = -RT ln K
Where ΔG° is the standard Gibbs free energy change, R is the gas constant (8.314 J/(mol·K)), T is the temperature in Kelvin, and ln represents the natural logarithm.
Given that the standard molar reaction entropy (ΔS°) is +21.6 J/(K·mol) and the standard molar reaction enthalpy (ΔH°) is -4362 kJ/mol, we can calculate ΔG° using the equation:
ΔG° = ΔH° - TΔS°
Converting the units:
ΔG° = (-4362 kJ/mol) - (298 K) * (21.6 J/(K·mol))
ΔG° = -4362 kJ/mol - 6448.8 J/mol
ΔG° = -4362 kJ/mol - 6.4488 kJ/mol
ΔG° = -4368.4488 kJ/mol
Now, substituting the values into the equilibrium constant equation:
-4368.4488 kJ/mol = -8.314 J/(mol·K) * 298 K * ln K
Dividing both sides by -8.314 J/(mol·K) * 298 K:
ln K = (-4368.4488 kJ/mol) / (-8.314 J/(mol·K) * 298 K)
Calculating the right-hand side of the equation:
ln K ≈ 16.41
Finally, taking the exponential of both sides to solve for K:
K ≈ e^(ln K)
K ≈ e^(16.41)
K ≈ 1.23 × 10^7
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Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?
Answers
Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?When heat is added to ice at 0°C, the temperature of the ice does not change. This happens because all the heat energy is used up in overcoming the intermolecular forces of attraction (hydrogen bonds) that exist between the water molecules in ice.
As a result, the ice undergoes a phase change, from a solid to a liquid. This process is called melting. During melting, the temperature of the ice remains constant at 0°C because all the heat energy is used up in overcoming the intermolecular forces of attraction.The energy required to melt ice is known as the heat of fusion. The heat of fusion is the amount of heat energy required to change 1 kilogram of a solid into a liquid at its melting point. For water, the heat of fusion is 334 kJ/kg. This means that 334 kJ of heat energy is required to melt 1 kg of ice at 0°C. Therefore, during the melting of ice, the temperature of the ice does not change, but the internal energy of the ice does change, and this is manifested in the change of phase from a solid to a liquid.In summary, when heat is added to ice at 0°C, the temperature of the ice does not change, and all the heat energy is used up in overcoming the intermolecular forces of attraction between the water molecules in ice. This results in the melting of ice without any change in temperature.For such more question on molecules
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Why is it necessary for astronauts on the International Space Station to generate and recycle oxygen?
Question 1 options:
Oxygen provides energy for the station's fuel tanks.
There is not enough oxygen in space to sustain life.
Oxygen protects the space station from radiation.
Oxygen is a by-product of human respiration.
Answers
It is necessary for astronauts on the International Space Station to generate and recycle oxygen because There is not enough oxygen in space to sustain life.
The correct answer choice is" There is not enough oxygen in space to sustain life."
In space, there is no breathable air as there is on Earth, and the amount of oxygen available is limited. Astronauts need a constant supply of oxygen to breathe and to sustain their bodily functions.
Therefore, the International Space Station has a closed-loop life support system that generates and recycles oxygen. This system converts carbon dioxide exhaled by the astronauts into oxygen through a process called electrolysis.
The generated oxygen is then supplied back into the station's atmosphere. This process helps ensure that the astronauts have a constant supply of breathable air and can survive in the space station for extended periods of time.
Therefore "There is not enough oxygen in space to sustain life." is the correct answer.
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The K of a given reactions is 432. Is the reaction favorable or not favorable?
Answers
Answer:Favorable
Explanation:um I know That it is Favorable sorry!
student is studying chemical changes and mixes two liquid compounds. Which statement best describes what the student should observe if a chemical reaction is occurring?
• The two substances dissolve.
O A solid substance appears.
• The mass of the substances increases.
• The temperature of the substances stays the same
Answers
If a chemical reaction or chemical change takes place, a solid substance appearing is an indication of chemical change taking place.
What are chemical changes?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
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An object has a mass of 57.8 g. Find the object's density, given that its volume is 40.14 cm3.
Answers
Answer:
1.44 g/cm^3
Explanation:
The equation for density is d=m/v.
which letters of an air mass represents moisture content
Answers
Answer:
Explanation:
One that forms over the Indian Ocean is called a maritime tropical air mass and is warm and humid. Air masses are classified on weather maps using two or three letters. A lowercase letter describes the amount of moisture in the air mass: m for maritime (moist) and c for continental (dry).
The letter 'c' of an air mass represents moisture content.
What is an air mass?An air mass can be described as a volume of air defined by its humidity and temperature. Air masses are classified depending on latitude and their continental or maritime source regions. Warmer air masses are deemed tropical while Colder air masses are termed polar or arctic.
The maritime and monsoon air masses are moist while Continental and superior air masses are dry. When an air mass will move away from its source region, water bodies and underlying vegetation can quickly modify its character.
The first letter "c" represents its moisture properties in continental air masses (dry) while "m" represents maritime air masses. The letter "T" stands for Tropical, "A" stands for Arctic or Antarctic, "E" stands for Equatorial, "P" stands for Polar, "M" stands for monsoon, and "S" stands for adiabatically drying and warming air.
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A compound is formed by cation A and anion B. The anions form hexagonal close packed (hcp) lattice and the cations occupy 50% of tetrahedral voids. The formula of the 23. compound is LAB (2) AB2 (3) ABA (4) A₂B
Answers
The formula of the compound is most likely AB2 or A₂B, depending on whether the cations occupy half or all of the tetrahedral voids, respectively. Option 2 or 4.
To determine the formula of the compound, we need to consider the ratio of the cations to anions in the crystal structure.
In an hcp lattice, each anion is surrounded by six cations in an octahedral arrangement. The tetrahedral voids are located in the gaps between four close-packed spheres and are surrounded by six anions. Each tetrahedral void can accommodate one cation.
Let's consider each option:
LAB: This formula suggests that there is one cation A for every one anion B. However, if we assume that all the tetrahedral voids are occupied by cations, then the ratio of cations to anions would be 2:3, which is not consistent with the formula LAB.
AB2: This formula suggests that there are two cations A for every one anion B. If we assume that half of the tetrahedral voids are occupied by cations, then the ratio of cations to anions would be 2:3, which is consistent with the formula AB2.
ABA: This formula suggests that there is one cation A for every two anions B. If we assume that all the tetrahedral voids are occupied by cations, then the ratio of cations to anions would be 1:1, which is not consistent with the formula ABA.
A₂B: This formula suggests that there are two cations A for every one anion B. If we assume that all the tetrahedral voids are occupied by cations, then the ratio of cations to anions would be 2:1, which is consistent with the formula A₂B.
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Two identical coolers are packed for a camping. Each cooler is packed with ten-one liter softdrinks and 1.5 kg of ice. The softdrinks that were packed in cooler A were first put inside the refrigerator for 8 hours, while the softdrinks that were packed in cooler B were only kept at room temperature for 8 hours also. When the campers opened the coolers after 4 hours later, most of the ice in cooler A is still ice, while almost all of the ice in cooler B have already melted. Explain what happened with the two coolers.
Answers
Answer:
Explanation:
The drinks that were put into cooler A have lower temperatures than the drinks that were put into cooler B.
As heat flows from high temperature to low temperature until it reaches equilibrium, more heat flows from the drinks to ice in cooler B than the heat flows from the drinks to ice in cooler A.
Thus, most of the ice in cooler B is melted as heat is transferred to the ice that results in its phase change.
The soft drinks in cooler B had higher thermal energy than the soft drinks in cooler A. Therefore, greater thermal energy flowed from the drinks in cooler B to ice, causing it to melt faster.
When the soft drinks are placed in ice, thermal energy flows from the object having a higher temperature to the object at a lower temperature until thermal equilibrium is achieved between the two bodies.
Note that the temperature difference between the soft drinks in cooler B and ice is much higher compared to the temperature difference between the soft drinks in cooler A and ice.
The reason behind this is that the soft drinks in cooler A were kept in a refrigerator for 8 hours while the soft drinks in cooler B were kept at room temperature for 8 hours.
When both groups of soft drinks were added to different coolers with the same 1.5 kg of ice, thermal equilibrium was attained in both cases.
The soft drinks in cooler B transferred more energy to the ice in four hours causing it to melt faster compared to the amount of energy transferred to it by the soft drinks in cooler B. The energy between the soft drinks in cooler A and ice were minimal hence the soft drinks in cooler A still remained ice after 4 hours.
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Learn more:
If you have 18 grams of carbon, how many moles of carbon do you have?
Answers
1.499moles
Explanations:
Given the following parameters
Mass of Carbon = 18 grams
Molar mass of carbon = 12.011 g/mole
Calculate the moles of carbon
\(\begin{gathered} \text{Moles of C=}\frac{Mass}{Molar\text{ mass}} \\ \end{gathered}\)Substitute the given parameters
\(\begin{gathered} \text{Moles of C=}\frac{18g}{12.011g\text{/mol}} \\ \text{Moles of C}=1.499\text{moles} \end{gathered}\)Hence the number of moles of carbon is 1.499moles
what is two or more atoms chemically bonded together?
Answers
Answer:
i belive its molecule
Explanation:
Explanation:
when they bond with each other the resultant chemical structure is molecule. the familiar water molecule is h2o
how does soil erosion affect living things
Answers
The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species. And degraded lands are also often less able to hold onto water, which can worsen flooding.
What does the red line in the diagram below represent?
OA. The activation energy
OB. The equilibrium position
C. The potential energy of the reactants
D. The difference in energy between the reactants and products
Answers
The red line in the diagram below represent
A. The activation energyWhat is the activation energy?In the given diagram, the red line represents the activation energy. Activation energy is the minimum amount of energy required for a chemical reaction to occur. It represents the energy barrier that must be overcome for the reactants to form products.
The reactants start with a certain amount of potential energy, and the activation energy represents the additional energy needed to reach the transition state where the reaction can proceed.
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ILL GIVE YOU A CROWN
Which farming method would mostly likely prevent soil erosion?
A.
contour plowing, to slow down water flow
B.
maximum tillage, to continually rotate topsoil
C.
planting one type of crop, to eliminate plant variety
D.
adding clay to the soil, to increase drainage
Answers
Answer:
A
Explanation:
The group that does not receive a treatment during an experiment is called the?
Answers
Suppose a solution has a density of 1.87 g/mL. If a sample has a mass of 17.5 g the volume of the sample in mL is what?
Answers
We can use the formula:
Density = Mass/Volume
Rearranging the formula gives:
Volume = Mass/Density
Substituting the given values gives:
Volume = 17.5 g / 1.87 g/mL = 9.36 mL.
HELPPP PLEASEE w/ all
Answers
The covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.
What is covalent bond ?
Atoms share electron pair between them in covalent bonds. H-H or C-H are examples of nonpolar covalent bonds between atoms with similar or identical electronegativity, whereas polar covalent bonds are formed when unequal electronegativity is shared between atoms (e.g., H–O).
What is reactant ?
Raw materials known as reactants combine to create products. When the right factors, such as temperature, time, or pressure, come into play, the chemical bonds between the reactants are broken, allowing the atoms to form new bonds that lead to various combinations.
Therefore, covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.
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methods for maximizing crystal growth , explain how?
Answers
Answer:
meth
Explanation:
YOu get chemicals and mix them together yes you do
i need the answers to this chemistry quiz
Answers
9. The number of mole of the argon contained in the tank is 2.39 moles
10. The volume (in liters) of H₂O produced from the reaction is 73.5 liters
9. How do i determine the number of mole?The number of mole of the argon contained in the tank can be obtained as follow:
Volume of balloon (V) = 6.25 LPressure (P) = 9.4 atmTemperature (T) = 26 °C = 26 + 273 = 299 KGas constant (R) = 0.0821 atm.L/mol KNumber of mole (n) =?PV = nRT
Inputting the given parameters, we have:
9.4 × 6.25 = n × 0.0821 × 299
Divide both sides by (0.0821 × 299)
n = (9.4 × 6.25) / (0.0821 × 299)
n = 2.39 moles
Thus, the number of mole of the argon gas in the tank is 2.39 moles
10. How do i determine the volume of H₂O produced?The volume of H₂O produced can be obtained as shown below:
4NH₃(g) + 5O₂(g) -> 6H₂O(g) + 4NO(g)
From the balanced equation above,
4 liters of NH₃ reacted to produced 6 liters of H₂O
Therefore,
49 liters of NH₃ will react to produce = (49 × 6) / 4 = 73.5 liters of H₂O
Thus, the volume of H₂O produced is 73.5 liters
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Determine the mass of SO₂ that contains 6.075 × 10^26 S atoms.
Answers
Answer:
= 64584.7176 g
or
= 64.5847 kg
Explanation:
From our question, we have been asked to find the mass of SO₂ containing 6.075 × 10^26 S atoms.
We know that from Avogadro's constant,
1 mole of a substance contains 6.02 x 10²³ ions/atoms/units
Thus,
1 mole => 6.02 x 10²³ atoms
x moles=> 6.075 × 10²⁶ atoms
We cross multiply;
x moles = (6.075 × 10²⁶ x 1)/(6.02 x 10²³)
= 1009.1362 moles
1 mole of SO2 = 64 g
1009.1362 moles = ?
=>
\( \frac{1009.1362 \times 64}{1} \)
= 64584.7176 g
= 64.5847 kg