The coefficient needed in front of the product potassium to properly balance this chemical equation is 3 (option B).
How to balance a chemical reaction?A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.
According to this question, potassium phosphide reacts with aluminum in a single replacement reaction to produce aluminum phosphide and potassium as follows:
K₃P + Al → AlP + 3K
The coefficient in front of pottasium in the balanced equation is 3.
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Can someone held me with 3 and 5 and then confirm that 4 is correct? (1 aluminum can=12.8g)
Answer:
Explanation:
3. We know the aluminum can has a mass of 12.8 g. We need moles of Al.
1 can = 12.8 g
1 mol Al = 27.0 g Al
12.8 g Al x (1 mol Al/27.0 g) = 0.474 mol
Note: The units of gram cancel and we are left with moles.
4. We have the mass of the can at 12.8 g. We need to use molar mass and Avogadro's number to find atoms.
1 mole = 6.022 x 10²³ atoms
12.8 g Al x (1 mol Al/27.0 g Al) x [(6.022 x 10²³/1 mol)] = 2.95 x 10²³ atoms
Note: The units of g and mol cancel and you are left with atoms.
5. Now we need to know how many cans it takes to have 1 mole of aluminum.
1 mol Al x (27.0 g Al/1 mol Al) x (1 can Al/12.8 g Al) = 2.11 cans
Note: The g and mol cancel and you are left with can.
Based on parts A and B how many planets are larger than earth ? How many planets are smaller than Earth
The planets Jupiter, Saturn, Uranus and Neptune are larger than Earth. Mercury, Venus and Mars are smaller.
What is the planet made of?Earth and the other three inner planets of our solar system Mercury, Venus and Mars are made of rock containing common minerals like feldspars and metals like magnesium and aluminum. The other planets are not solid. Jupiter for instance is made up mostly of trapped helium, hydrogen and water.
The planets in order of size listed from biggest to smallest:
Jupiter: 43,441-mile radiusSaturn: 36,184-mile radiusUranus: 15,759-mile radiusNeptune: 15,299-mile radiusEarth: 3,959-mile radiusVenus: 3,760-mile radiusMars: 2,106-mile radiusMercury: 1,516-mile radiusLearn more about planet here: brainly.com/question/1286910
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How many hydrogen atoms in the molecule?
A city block is 0.161
km long. How many cm is this?
Answer:
16100 cm
Explanation:
To convert km to cm you have to multiply the length value by 100000
0.161km × 100000
= 16100cm
A city block that is 0.161 km long is 16,100 cm long.
Explanation:To find out how many centimetres are in a city block that is 0.161km long, we need to convert kilometres to centimetres. Since 1 kilometre is equal to 100,000 centimetres, we can calculate the length of the city block in centimetres by multiplying 0.161km by 100,000. Using the formula:
Length in cm = Length in km x 100,000
We know that 1 kilometre, or km, is equivalent to 100,000 centimetres, or cm. To convert kilometres into centimetres, what you do is multiply the given value in kilometres by 100,000. In your case, if a city block is 0.161 km long, you multiply 0.161 by 100,000 which gives you 16,100 cm.
Therefore, a city block that is 0.161 km long is 16,100 cm long when converted into centimetres.
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2C₂H₂(g) +50₂(g) → 4CO₂(g) + 2H₂O(g)
This is a balanced equation for the combustion of acetylene (C₂H₂). How many
grams of acetylene(C₂H₂) are required to produce 1.0 moles of CO₂?
5.0 grams
0.20 grams
13.0 grams
10.0 grams
Which sequence shows the order of landscape regions that are crossed as water flows through the Catskill Aqueduct?
The order of landscape regions that are crossed as water flows through the Catskill Aqueduct is: mountain, hill, valley, plain.
Where does water ultimately end up after flowing through all of the landscape regions in the Catskill Aqueduct?The final destination of water after flowing via the one-of-a-kind landscape regions inside the Catskill Aqueduct is the new york metropolis metropolitan location. The aqueduct is part of the big apple city water supply machine, and it brings water from the Catskill Mountains to the metropolis. The Catskill Aqueduct is one in every of numerous systems that offer sparkling water to the metropolis, and it's miles taken into consideration one of the most vital water supply systems in the international. The water is handled at numerous factors along the way, making sure that it is secure for intake by using hundreds of thousands of human beings inside the town.
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how long does it take for the moon to complete one full revolution around the earth
if 4.00 grams of nahco3 are used how many grams of co2 are produced
(b) The student collects the H2(g) produced by the reaction and measures its volume over water at 298 K after carefully
equalizing the water levels inside and outside the gas-collection tube, as shown in the diagram below. The volume is
measured to be 45.6 mL. The atmospheric pressure in the lab is measured as 765 torr, and the equilibrium vapor pressure
of water at 298 K is 24 torr,
45
46
Gas
Water
Calculate the following.
() The number of moles of h2 produced in the reaction
0.0136 moles of hydrogen are produced in the reaction.
What is dalton's law of pressure ?Dalton's law of partial pressures states that the total pressure of a mixture of gases is the sum of the partial pressures of its constituent gases.
Total pressure = Pressure 1 + Pressure 2 + Pressure 3
According to Dalton's law of partial pressure,
Pressure = 765 - 24
= 741 torr
Substituting the given values in the ideal gas equation,
PV = nRT
n = PV / RT
n = 741 × 45.6 × 10 / 8.314 × 298
= 0.0136 moles.
Thus, 0.0136 moles of hydrogen are produced in the reaction.
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How would you make 100 mL of a carbonic acid buffer at 0.2 M and pH = 9.8 using 0.5 M NaHCO3 and either 0.1 M NaOH or 0.1 M HCl and water?
In order to make a 100 mL of a carbonic acid buffer at 0.2 M and pH = 9.8 using 0.5 M NaHCO₃ and either 0.1 M NaOH or 0.1 M HCl and water, one needs to add 0.5 M NaHCO₃ and either 0.1 M NaOH or 0.1 M HCl to achieve the desired pH.
How do you make a 100 mL of a carbonic acid?To make 100 mL of a 0.2 M carbonic acid buffer at pH = 9.8, you will need to add a sufficient amount of 0.5 M NaHCO₃ and either 0.1 M NaOH or 0.1 M HCl to achieve the desired pH.
Here is one way to do it:
Start by adding 50 mL of 0.5 M NaHCO₃ to a beaker or flask.Measure the pH of the solution using a pH meter or indicator.Add small aliquots of 0.1 M NaOH to the solution until the pH reaches 9.8.Alternatively, you can add small aliquots of 0.1 M HCl to the solution until the pH reaches 9.8.Once you have achieved the desired pH, add water to bring the total volume to 100 mL.Stir the solution well to ensure that it is well mixed.However, the exact procedure may vary depending on the specific requirements of your experiment.
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8) Label the atom model with following: electrons, protons, neutrons, and nucleus.
Answer:
Explanation:
Nucleons are the components of the nucleus of an atom. A nucleon can either be a proton or a neutron. Each element has a unique number of protons in it, which is described by its unique atomic number. However, several atomic structures of an element can exist, which differ in the total number of nucleons.
Which of the fellowing compaunds contains covalent bond
Answer:
this is the answer to ur question hope it helpful
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What is the resolution of a monochromator, Δλeff, with a exit slit width of 500 micrometers and a [tex]D^{-1}[/tex] of 1.8 nm/mm? Express the answer in nm.
The resolution of the monochromator is 3.6nm
What is a MonochromatorA monochromator is an optical device that is used to isolate a specific wavelength or range of wavelengths of light from a broader spectrum of light. It is typically used in spectroscopy, where the goal is to measure the intensity of light at a specific wavelength or over a range of wavelengths.
The resolution of a monochromator, Δλeff, is given by the equation: Δλeff = (D^-1) * (exit slit width)
Plugging in the given values:
Δλeff = (1.8 nm/mm) * (500 micrometers)
Converting micrometers to millimeters:
Δλeff = (1.8 nm/mm) * (0.5 mm)
Δλeff = 3.6 nm
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If you have 9.01 moles of ammonia, NH, how many molecules are there?
Answer:
If you have 9.01 moles of ammonia, NH3, there are 54.06 x 10^23 molecules of ammonia present. This is calculated using the Avogadro's number, which is the number of particles (atoms or molecules) in one mole of a substance, which is 6.022 x 10^23 particles per mole.
give me brainiest
If you have 9.01 moles of ammonia, 54.06 x 10^23 molecules of ammonia are there
What does the term "mole number" mean?
A mole is 6.02214076 x 10^23 of any chemical unit, including atoms, molecules, ions, and others. Due to the large number of atoms, molecules, or other components that make up any substance, the mole is a useful measure to utilize.
There are 54.06 x 10^23 molecules of ammonia when 9.01 moles of ammonia, NH3, are present. The Avogadro's number, or the number of particles (atoms or molecules) in one mole of a substance, which is 6.022 x 1023 particles per mole, is used to compute this.
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How many moles of copper must react to form 0.854 mol Ag?
mol Cu
As per the given balanced chemical equation, one mole of copper metal reacts to form 2 moles of Ag. Hence, the number of moles of Cu to form 0.854 moles of Ag is 0.427.
What is copper ?Copper is a transition metal in d block of periodic table. Copper forms ionic compounds by losing electrons. As other transition metals copper shows variable oxidation states.
The given reaction is a single displacement reaction between two metals. Cl group exchanges between the metals Cu and Ag. In the given reaction, one mole of Cu reacts with 2 moles of AgCl giving two moles of Ag and one mole of CuCl₂.
The number of moles of Cu required to produce 0.854 mol of Ag is calculated as:
no.of moles of Cu = 0.854 / 2 = 0.427 moles.
Hence, 0.427 moles of Cu is needed.
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Your question is not complete. But your complete question probably was :
Consider the reaction given below:
[tex]\rm Cu + 2 AgCl \rightarrow CuCl_{2} + 2 Ag[/tex]
How many moles of copper must react to form 0.854 mol Ag?
mol Cu.
54.0 g Al reacts with 64.0 g o2 to form alg203 according to the equation 4al+302->2al203
02: 32g/mol al2o3: 102 g/mol
How many grams of al203 form from 64.0 g o2
136 g Al₂O₃ grams of al203 form from 64.0 g o2
What is Molar mass?Based of the fact that you were given 2 masses I would assume this to be a limiting reagent question. However amount on the left side both equal 2. Ignoring limiting reagents and focusing on just O2 the steps would be:1. Make sure the equation is balanced ( already given)2- Use given values to find the mols of O2 (mass/molar mass)3. Mols are conserved but due to the coefficients the molar value from O2 must be divided by three and multiplied by 2 to ensure proper ratios4. Using that amount the mass can derived using amount/molar mass5. Use proper significant digits and units(3 in this case)To learn more about Molar mass refers to:
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a gold atom is a sphere with a diameter with 272 pm and a mass with 3.27x 10^-13 ngs. calculate the density of one gold atom in g/cm ^3
The density of the gold is 2.5 * 10^2 g/cm^3.
\What is the density of the gold?We have to know that the density is one of the properties of the material that help us to be able to know the kind of material that we have. In this case, we are told that the material that we have to deal with here is gold.
Volume of the gold = 4/3πr^3
Where r = radius = 272 * 10^-12/2 = 1.36 * 10^-8 cm
Volume = 4/3 * 3.142 * (1.36 * 10^-8)^3
= 1.1 * 10^-23 cm^3
The we have that;
Density = mass/ volume
Density = 27x 10^-13 * 10^-9 g/ 1.1 * 10^23 cm^3
2.7 * 10^-21/1.1 * 10^-23 cm^3
= 2.5 * 10^2 g/cm^3
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How do scientific themes connect all branches of science?
OA. The same themes are found in all areas of science.
OB. The themes were all developed at the same time.
OC. The same scientists developed the themes for all areas.
OD. The themes all originated from the same observations.
SUE
The themes were all developed at the same time connect all branches of science.
Define science?A science is a specific field of science, such as biology, chemistry, or physics. Science is a method that enables one to have trustworthy information (justified genuine belief) about nature with the greatest degree of certainty feasible. The scientific method is the process used to support scientific information and so make it credible.A science is a specific field of science, such as biology, chemistry, or physics. The science of microbiology is the best example of a discipline that has produced robust, abstract hypotheses. Synonyms include field of study, body of knowledge, discipline, and branch of knowledge. More scientific synonymsTo learn more about science refer to:
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How many electrons are in the 6p subshell of Rn?
In the electrical arrangement, the 6p subshell of the radon element contains 6 electrons.
What is electronic configuration of radon?Radon is the 86th element in the periodic table, with the symbol 'Rn'. Radon is a type of noble gas. Radon contains a total of eighty-six electrons. These electrons are grouped in accordance with the laws of several orbits.The p-orbital can hold up to six electrons. As a result, the following six electrons enter the 2p orbital. The second orbit is now completely filled. As a result, the remaining electrons will go into the third orbit.As a result, the entire electron configuration of radon is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14 5s^2 5p^6 5d^10 6s^2 6p^6.For more information on electronic configuration kindly visit to
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How many formula units are there in 1.86 mol of strontium phosphate, Sr3(PO)2 ?
PLEASE HELP I HAVE A TEST TOMORROW & don’t understand
The formula units are there in 1.86 mol of strontium phosphate Sr₃(PO)₂ is 0.0247 gram.
What is molar mass ?
The mass in grams of one mole of a chemical is its molar mass. A mole is the measurement of the number of things, such as atoms, molecules, and ions, that are present in a substance.
The mass of 1 mole of a chemical is indicated by its molar mass. It provides you with the amount of grams per mole of a substance, to put it another way. Therefore, grams/mole are the units for molar mass.
The molar mass of Sr₃(PO)₂ is 452.8027 g/mol.
Then 1.86 mol of strontium phosphate
= 1.86 × 6.023 × 10²³ / 452.8027
= 0.0247 gram
Thus, The formula units are there in 1.86 mol of strontium phosphate Sr₃(PO)₂ is 0.0247 gram.
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HELP ME PLEASE !!!
One time I went to the mountains. I was scared of altitude sickness, so I got cannisters of oxgen (O₂). These cannisters contain 2L of compressed oxygen (O₂). When the oxygen is pressurized, it condenses into its liquid form inside the cannister. How much would this oxygen (0₂) weigh in its liquid form?
2.9 grams
1.6 grams
3.6 grams
4.3 grams
According to the question,4.3 grams would this oxygen (0₂) weigh in its liquid form.
What is the oxygen ?
Oxygen is an essential element for life. It is a colorless, odorless gas that makes up about 21% of the Earth's atmosphere. Oxygen is a vital component for the production of energy in all living things, as it is necessary for the process of respiration. Without oxygen, all living organisms would suffer, as their cells would not be able to produce the energy they need to survive. Oxygen is also necessary for the combustion of fuels, as it helps to create the conditions required for burning to occur. In addition, oxygen is used in many different industrial and scientific processes, ranging from welding to creating rocket fuel. Oxygen is incredibly important to life on Earth and is essential for the survival of all organisms.
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What volume in L of air (density of 1.20g/L and .0\%)_{2}\cdot5y
mass) is required to burn 1.00 gallon of gasoline (density.
0.78 g/cm³), which can be represented as C_{8}H_{16}?
Assume a 100% yield and complete consumption of the
C_{8}H_{16}(l)+120/g) 8CO_{2}(g)+8H_{2}O(g)
The volume in L of air required to burn 1.00 gallons of gasoline is 8435.2 L.
What is the volume of air required in the combustion of 1.00 gallons of gasoline?The volume of air required in the combustion of 1.00 gallons of gasoline is determined as follows:
Equation of the reaction: C₈H₁₆ + 12 O₂ ---> 8 CO₂ + 8 H₂O
12 moles of air reacts with 1 mole of gasoline
Mass of gasoline in 1.00 gallons = 0.78 * 1 gal * 3785.4 cm³/gal
Mass of gasoline in 1.00 gallons = 2952.6 g
Moles of gasoline = 2952.6 g / 112 g/mol
Moles of gasoline = 26.36 moles
Mass of air required = 26.36 * 12/1 * 32
Mass of air required = 10122.24 g
The volume of air in L required = 10122.24 g / 1.20
The volume of air in L required = 8435.2 L
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You measure the length of the waterfall along the map, and determine that it is 0.25
mm in length. How many meters does this represent?
a) 6.0 meters
b) 9.6 meters
c) 12.1 meters
d) 14.0 meters
According to the question the waterfall is 9.6 meters in length, or 0.25 millimeters.
How long and wide are they?The distance separating an object's ends is its length. The longest dimension is this one. The width of an object is the separation between its two sides. The shortest dimension is this one. Height is the measurement between an object's top and bottom.
To convert 0.25 mm to meters, we need to divide it by 1000.
0.25 mm / 1000 = 0.00025 m
Therefore, the length of the waterfall is 0.00025 m.
To convert this to meters, we need to multiply it by 1000.
0.00025 m x 1000 = 0.25 m = 9.6 meters
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Now suppose that you carefully repeat your experiment using an analytical balance and a
graduated cylinder that can be read to the nearest 0.01 mL. The recorded mass is 16.7755g. The
graduated cylinder readings before and after introducing the metal object are 27.86 mL and 37.86
mL respectively.
Answer:
Explanation:
a) mass of object = 16.78 g volume displaced by object = 37.7-27.8 = 9.90 ml density = mass/volume = 16.78 g/9.90 ml = 1.69 g/ml
why is it important for us to be able to make hydrogen from seawater instead of pure water? 
Answer:
It is important for us to be able to make hydrogen from seawater instead of pure water for several reasons:
Abundance: Seawater is abundant and widely available, making it a more sustainable and renewable source of hydrogen compared to pure water, which is often in limited supply.
Cost-effective: Seawater is a low-cost source of hydrogen, as it does not require the use of fresh water, which can be scarce and expensive in many regions.
Energy efficient: Seawater contains dissolved salts and minerals, which can be used as catalysts to speed up the water splitting process and make it more energy efficient.
Environmental impact: Using seawater as a source of hydrogen instead of pure water reduces the amount of freshwater that is used, conserving this precious resource and minimizing the environmental impact of water extraction and transportation.
Versatility: Seawater can be used as feedstock for various hydrogen production methods such as electrolysis, thermolysis, photocatalysis, and biotechnology.
In summary, being able to make hydrogen from seawater is crucial to address the growing energy demand while also preserving fresh water resources, and also to make hydrogen production more sustainable and cost-effective.
Explanation:
hope this helps
does a sailboat or a submarine has more momentum
Answer: Submarine
Explanation:
Depends on the size and weight of the sailboat and submarine but the submarine will have more momentum because it is heavier.
when we put ice into a beaker which filled with water why water has not dropped ?
Answer: Yo! hope this helps you dude
When ice is placed into a beaker filled with water, the water level does not drop because of the concept of displacement. When the ice is added, it displaces an amount of water equal to its own volume. This means that the ice takes up space in the beaker, pushing out an equal amount of water to make room for itself. Therefore, the total volume of water and ice in the beaker remains the same, and the water level does not drop.
This is due to the fact that the density of ice is lower than that of water and when the ice is placed into the water, it will float on the surface, pushing out an amount of water equal to its own volume.
Additionally, when the ice melts, it will release the same amount of water it displaced before and the water level will not change.
Explanation:
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.
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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How many moles of hydrogen are produced when 6.28 mol of oxygen form?
The following balanced chemical equation describes how hydrogen and oxygen react. which is 0.253 mol.
How many moles of hydrogen are produced more of oxygen form?Think about what happens next. [tex]2H_2 O[/tex] equals 0.253 mol for [tex]2H_2[/tex] and [tex]O_2[/tex]. a balanced equation 2H2 + O2 → [tex]2H_2 O[/tex] 2.5 molecules of water three moles of water both 5.0 and 6.0 moles of water. The value of 16.5 M. nolds is then obtained by multiplying 11 by the number of oxygen moles created, which is equal to 11 moles of aluminium.
The figure we obtain by multiplying 13.35 moles by the number of moles of oxygen (o2) is almost equivalent to 26.7 moles of h,2,o. Below is a diagram illustrating the balanced chemical equation for the reaction between oxygen and hydrogen. 0.253 mol, to be exact. Walter produces 12 moles of product. It is possible to argue that the reaction will generate if hydrogen gas is not a limiting reagent.
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Imagine 2 glasses filled with the
same amount of water. You place
one glass in the freezer and leave
one glass on the counter. You
observe both glasses the next
day. Compare and contrast the
mass, temperature, and state of
matter of both glasses of water.
Both containers' molecules move at the same average speed. The full glass contains more internal energy. In fact, it will take twice as much heat to raise the temperature of the full glass by one degree Celsius.
What is internal energy ?The term internal energy is defined as the total of the kinetic energy due to the motion of molecules and the potential energy related with the vibrational motion and electric energy of atoms within molecules.
The system's heat is equal to the internal energy. Because heat is neither created nor destroyed, when the ambient temperature rises, the system's temperature falls.
Thus, Both containers' molecules move at the same average speed. The full glass contains more internal energy.
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