Answer:
separating solute particles in the pure solute and separating solvent particles in pure solvent
Explanation:
when we talk about a solution, it means the homogeneous mixture of different substances of two or more.
Enthalpy change of solution is the quantity of heat that is released during the process of dissolving.
If solute molecules have been broken from the intermolecular forces that bind them and also solvent molecules have been broken from the intermolecular forces binding them, then we have an endothermic process.
so the answer is:
separating solute particles in the pure solute and separating solvent particles in pure solvent
Until a train is a safe distance from the station it must travel at 5 m/s Once the train is on open track it can speed up
to 45 mls. If it takes a train 8 seconds to reach 45 m/s, what is the acceleration of the train? (Round your answer to
the nearest whole number)
4 m/s2
5 m/s2
6 m/s2
7 m's?
Answer:
5 m/s²
Explanation:
From the question given above, it took 8 s for the train to get to a speed of 45 m/s. This simply means the train was maintaining 5 m/s as it travels in order to get to an open track.
Thus, we obtained the following data from the question.
Initial velocity (u) = 5 m/s
Final velocity (v) = 45 m/s
Time (t) = 8 s
Acceleration (a) =.?
Acceleration is simply defined as the rate of change of velocity with time. Mathematically, it can be expressed as:
a = (v – u) /t
Where:
a is the acceleration.
v is the final velocity.
u is the initial velocity.
t is the time.
With the above formula, we can obtain the velocity of the train as follow:
Initial velocity (u) = 5 m/s
Final velocity (v) = 45 m/s
Time (t) = 8 s
Acceleration (a) =.?
a = (v – u) /t
a = (45 – 5) / 8
a = 40/8
a = 5 m/s²
Therefore, the acceleration of the train is 5 m/s².
Answer:
Its B =)
Explanation:
The chemical formula for carbonic acid, a compound used in carbonated drinks, is H2CO3. Assume that these symbols represent the three
elements of this compound:
carbon
oxygen
hydrogen
Which picture correctly represents carbonic acid?
The chemical formula of carbonic acid is H₂CO₃ and in the structure form it will be represented according to the first structure.
What are acids?Acids are those substances which are having carboxylic group (-COOH) as a funtional group in it.
Given molecular formula of carbonic acids is H₂CO₃, in which one carbon atom is present in carboxylic group. In the molecule two hydrogen atoms are present and one of them is present in -COOH group and all three oxygen atoms are attached with carbon atom.
Hence the first image shows the structure of carbonic acid.
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determine the number of moles of KOH present in 95.0 ml of 0.255 M solution
Answer:
Moles of KOH in 1000 mL solution = 0.255 moles
Moles of KOH in 1 mL solution = 0.255/1000 = 0.000255 moles
Moles in 95 mL solution = (95 * 255)/1000000 = 24225/1000000
Moles of KOH in 95 mL 0.255M solution = 0.024225 moles
The number of moles of KOH present in 95.0 ml of 0.255 M solution is 0.024mol
HOW TO CALCULATE NUMBER OF MOLES:
The number of moles of a substance can be calculated by multiplying the molarity/concentration of the substance by its volume:no. of moles = molarity (M) × volume (L)
According to this question, 95.0 ml of KOH is present in 0.255 M solution, hence, the number of moles can be calculated as follows:Volume of KOH = 95.0ml = 0.095Lno. of moles = 0.095 × 0.255no. of moles = 0.024molTherefore, the number of moles of KOH present in 95.0 ml of 0.255 M solution is 0.024mol.Learn more at: https://brainly.com/question/21085277?referrer=searchResults
Infer: The metric system uses prefixes to tell you how much to multiply the base unit by. For example, in the metric system, the base unit for length is the meter. Examples of prefixes include kilo-, centi-, and milli-.
Knowing that 1,000 meters are in 1 kilometer, what do you think the prefix kilo- means?
Answer:
kilo means one thousand
Explanation:
Seeing as there are 1000 metres in one kilometre
Knowing that 1,000 meters are in 1 kilometer, The prefix kilo means 1000 or 1 kilogram (kg).
What is the metric system?The metric system is the system that uses gram, liter, and meter as the base unit for measuring the distance, volume, and length of any object or entity.
The metric system was started in France in 1970. There are common seven units in the metric system. The three main base units are gram, liter, and meter.
A liter is used to measure the Volume. Grams are used to measuring the quantity of a solid item. Meter is used to measure the distance or length of anything.
The kilogram is the base unit for measuring the quantity of any solid item, such as rice, and 1 kg of rice is the quantity of rice.
Thus, the prefix kilo means 1000 or 1 kilogram (kg).
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In which way are photosynthesis and cellular respiration different?
A.
Cellular respiration stores ATP, while photosynthesis releases ATP.
B.
Cellular respiration produces oxygen, while photosynthesis uses oxygen.
C.
Photosynthesis releases energy, while cellular respiration stores energy.
D.
Photosynthesis used carbon dioxide, while cellular respiration produces carbon dioxide.
Answer:
D. Photosynthesis uses carbon dioxide while cellular produces carbon dioxide
How many atoms are in 8g of Oxygen (O2)?
Answer:
There are 3.011 × 10^23 oxygen atoms
Which statement about the specific heat capacity of aluminum is correct?
Answer:
900 J/kg°C.
Explanation:
Which part of an organism is preserved in cast and mold fossils?
Answer: Bones.
Explanation:
Answer:
Bone
Explanation:
A compound is made up of 28 g N, 24 g C, 48 g O, and 8 g H .What is the empirical formula?
Answer:
[tex]\rm C_2H_8N_2O_3[/tex].
Explanation:
Step One: calculate the coefficients.Look up the relative atomic mass of these four elements on a modern periodic table:
[tex]\rm C[/tex]: approximately [tex]12[/tex].[tex]\rm H[/tex]: approximately [tex]1[/tex].[tex]\rm N[/tex]: approximately [tex]14[/tex].[tex]\rm O[/tex]: approximately [tex]16[/tex].The relative atomic mass of an element is numerically equal to the mass (in grams, [tex]\rm g[/tex],) of one mole of atoms of this element.
For example, the relative atomic mass of [tex]\rm C[/tex] is approximately [tex]12[/tex]. Therefore, each mole of [tex]\rm C\![/tex] atoms would have a mass of [tex]12\; \rm g[/tex].
This sample contains [tex]24\; \rm g[/tex] of carbon. That would correspond to approximately [tex]\displaystyle \left(\frac{24}{12}\right)\; \rm mol = 2\; \rm mol[/tex] of [tex]\rm C[/tex] atoms.
Similarly, for the other three elements:
[tex]\displaystyle n(\mathrm{H}) \approx \frac{8\; \rm g}{1\; \rm g \cdot mol^{-1}} = 8\; \rm mol[/tex].
[tex]\displaystyle n(\mathrm{N}) \approx \frac{28\; \rm g}{14\; \rm g \cdot mol^{-1}} = 2\; \rm mol[/tex].
[tex]\displaystyle n(\mathrm{O}) \approx \frac{48\; \rm g}{16\; \rm g \cdot mol^{-1}} = 3\; \rm mol[/tex].
Hence, the ratio between these elements in this compound would be:
[tex]n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3[/tex].
In the empirical formula of a compound, the coefficients should represent the smallest possible integer ratio between the number of atoms of these elements.
[tex]n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3[/tex] is indeed the smallest possible integer ratio between the number of atoms of these elements.
Step Two: arrange the elements in an appropriate orderApply the Hill System to arrange these four elements in the empirical formula. In the Hill System:
If carbon, [tex]\rm C[/tex], is present in this compound, then:
[tex]\rm C[/tex] (carbon) and then [tex]\rm H[/tex] (hydrogen) will be the first two elements listed in the formula (ignore the hydrogen if it is not in the compound.) The other elements in this compound will be listed in alphabetical order.If there is no carbon [tex]\rm C[/tex] in this compound, then list all the elements in this compound in alphabetical order.
Both [tex]\rm C[/tex] (carbon) and [tex]\rm H[/tex] (hydrogen) are found in this compound. Therefore, the first element in the list would be [tex]\rm C\![/tex]. The second would be [tex]\rm H\![/tex], followed by [tex]\rm N\![/tex] and then [tex]\rm O\![/tex].
Hence, the empirical formula of this compound would be [tex]\rm C_2H_8N_2O_3[/tex].
The empirical formula of the compound is C₂H₈N₂O₃
From the question given above, the following data were:
Carbon (C) = 24 g
Hydrogen (H) = 8 g
Nitrogen (N) = 28 g
Oxygen (O) = 48 g
Empirical formula =?The empirical formula of the compound can be obtained as follow:
C = 24 g
H = 8 g
N = 28 g
O = 48 g
Divide by their molar massC = 24 /12 = 2
H = 8 /1 = 8
N = 28 /14 = 2
O = 48 / 16 = 3
We can see from the above calculations that the elements are in simple whole number ratio.
Thus, the empirical formula of the compound is C₂H₈N₂O₃
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If a bike messenger travels 16 kilometers in a time of 8 minutes, what is her average speed?
Answer:
2
Explanation:
16 ÷ 8 = 2
What is the mass of 80.0 mL of ethanol at 20°C?
Answer:
The mass is 63.1 grams.
Explanation:
ck-12 said it was correct.
A drop of water contains 2 x 104 bacteria. How many bacteria are in 100 gallons of water? [1 drop = 1 mL]
Answer:
7.57×10⁹ bacteria.
Explanation:
We'll begin by convert 100 gallons of water to millilitres (mL). This can be obtained as follow:
1 gallon = 3785.41 mL
Therefore,
100 gallons = 100 gallon × 3785.41 mL / 1 gallon
100 gallons = 378541 mL
Therefore, 100 gallons of water is equivalent to 378541 mL.
Next, we shall convert 378541 mL to drop of water. This can be obtained as follow:
1 mL = 1 drop
Therefore,
378541 mL = 378541 mL × 1 drop/ 1 mL
378541 mL = 378541 drop
Therefore, 378541 mL is equivalent to 378541 drops of water.
Finally, we shall determine the number of bacteria in 378541 drops of water as follow:
1 drop = 2×10⁴ bacteria
Therefore,
378541 drop = 378541 drop × 2×10⁴ bacteria / 1 drop
378541 drop = 7.57×10⁹ bacteria.
Therefore, there are 7.57×10⁹ bacteria in 100 gallons of water
Please Help! 100 points!!!!!
In Parts I and II of the lab, what happened to the electrons of each element to produce the different colors of light? Explain your answers using important terms from the lesson and information provided in the laboratory.
Answer:
In Parts I and II of the lab, what happened to the electrons of each element to produce the different colors of light? ... When heat was added to the elements, the electrons absorbs the energy and moves to its excited state. Once the electron starts to fall back to a lower orbit, it emits energy in the form of light.
Happy to help ☀️Keep on shining☀️
Explanation:
Determine the formula weight of Ca(no3)2
Answer:
the formula is 164.088 g/mol
Explanation:
Which of these is a characteristic of science?
Answer:
What are the characteristics of science? Objectivity: Scientific knowledge is objective. Verifiability: Science rests upon sense data, i.e., data gathered through our senses—eye, ear, nose, tongue and touch. Ethical Neutrality: Science is ethically neutral. Systematic Exploration.
Explanation:
there are no options but I search and this is what I got.
can I have brainliest
If you assumed 100 total atoms in a sample, how could you relate the % values
shown in the sim into a number you could use for your calculation of average
masses?
Answer:
use the percent as the abundance and multiply it by the atomic mass and add the values together
Explanation: idk but i got it from quizlet
We have that the % values shown in the sim into a number you could use for your calculation of average masses is given as
[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]
From the question we are told
If you assumed 100 total atoms in a sample, how could you relate the % values shown in the sim into a number you could use for your calculation of average masses?
Generally
We will consider that the 100 total atoms as the the atoms at a 100 percent
The substance at a 100 atoms is to be calculated and is to be given as
Generally the equation for the average atomic mass is mathematically given as
[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]
Therefore
Now, the % values shown in the sim into a number you could use for your calculation of average masses is given as
[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]
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Calculate the enthalpies of formation, ΔHf∘, of the group 1 fluoride compounds from their elements using the Born–Haber cycle.
Process ????H∘, ????????/????????????
sublimation of K(s) 90
sublimation of Cs(s) 78
dissociation of F2(g) 158
ionization energy of K(g) 419
ionization energy of Cs(g) 376
electron affinity of F(g) −322
lattice enthalpy of KF(s) 821
lattice enthalpy of CsF(s) 750
Answer:
Enthalpy of formation of KF = -555 kJ/mol
Enthalpy of formation of CsF = -539kJ/mol
Explanation:
Explanations are provided in the attachment below
PLEASE HELP! IDK THIS ONE..
Which substance has the weakest intermolecular forces?
A) I (s)
B )Br (l)
C )O2 (g)
D) Cl2 (l)
Answer:
C
Explanation:
O2 is a gas and gas has spread out molecules compared to the other states of matter. As such, liquid and solids have stronger intermolecular forces. Since dioxygen is the only gas in the possible answers, O2 has the weakest intermolecular force.
The substance with the weakest intermolecular forces among the options provided is [tex]O_2[/tex](g), which refers to gaseous oxygen molecules. The correct answer is option C.
Intermolecular forces are the attractive forces that exist between molecules and affect the physical properties of substances. The strength of intermolecular forces depends on factors such as the types of molecules involved and their molecular structures.
Among these options, the substance [tex]O_2[/tex](g) has the weakest intermolecular forces. Gaseous oxygen ([tex]O_2[/tex]) molecules are non-polar and are held together by relatively weak London dispersion forces, which are a type of van der Waals forces. These forces arise from temporary fluctuations in electron density within the molecules.
Therefore, compared to the other options, [tex]O_2[/tex](g) has the weakest intermolecular forces because the dispersion forces are generally weaker than the dipole-dipole forces present in the other substances.
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. A protein has molecular mass of 400 kDa when measured by size exclusion chromatography. When subjected to gel electrophoresis in the presence of sodium dodecyl sulfate (SDS), the protein gives three bands with molecular masses of 180, 160, and 60 kDa. When electrophoresis is carried out in the presence of SDS and dithiothreitol, three bands are again formed, this time with molecular masses of 160, 90, and 60 kDa. Determine the subunit composition of the protein.
Answer:
The protein has 4 subunits: 2 subunits of 90 kDa, 1 subunit of 160 kDa and 1 subunit of 60 kDa
Explanation:
In gel electrophoresis, the SDS agent produces denaturation of the protein and confers negative charge, so the protein subunits can migrate according to their masses. It produces dissociation of the protein in its subunits but it cannot disrupt disulphyde bridges (S-S) that can bond subunits together.
From the data, with SDS we observe 3 bands ⇒ 180 kDa + 160 kDa + 60 kDa
The addition of dithiotreitol (DTT), a reducing agent, produces the disruption of disulphyde bridges. From the data:
With DTT ⇒ 160 kDa + 90 kDa + 60 kDa
We observe that 160 kDa and 60 kDa subunits are conserved (they are the same as with SDS only), but 180 kDa subunit is missing and in its place appears a band of 90 kDa - a half 180 kDa.
So, the band at 180 kDa is composed by two subunits bonded by a disulphyde bridge.
Therefore, the composition of the protein is: 1 subunit of 160 kDa, 2 subunits of 90 kDa and 1 subunit of 60 kDa.
If the distance between two objects decreases what would happen to gravity between them AFASP
Answer:
They would both have a pull.
Explanation:
Every object in space and time has a pull, more specific, a gravitational pull. The objects will have a very slight pul, but still have a gravitational pull.
Answer:
They would both have a pull.
Explanation:
also how do u do that obj thing???

If a substance reacts with oxygen, the chemical reaction is most likely a combustion reaction. decomposition reaction. single replacement reaction. double replacement reaction.
Answer:
Option A is correct = combustion
Explanation:
When substance react with oxygen combustion is occur. The substance which burned is called fuel and in this process large amount of heat is released to the surrounding. It is exothermic process.
For example:
4Li + O₂ → 2Li₂O
2Mg + O₂ → 2MgO
S + O₂ → SO₂
The product which is formed as a result of combustion reaction are called oxides.
In given examples we can see that lithium, magnesium and sulfur react with oxygen and product formed is oxides of respective elements such as lithium oxide ( Li₂O), magnesium oxide (MgO) and sulfur oxide ( SO₂ ).
Other options are incorrect because:
Single replacement:
It is the reaction in which one elements replace the other element in compound.
AB + C → AC + B
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
AB + CD → AC +BD
Decomposition reaction:
It is the reaction in which one reactant is break down into two or more product.
AB → A + B
Answer:
a
Explanation:
HELP!!
What structure is found in the nucleus of a cell and is made up of coiled strands of DNA?
O protein
O gene
O chromosome
O centriole
The molecule cyanazine, once used as an herbicide, has now been phased out by the EPA because of its significant human toxicity. Add lone pairs, as needed, to the structure of cyanazine. Indicate the hybridization of the specified atoms. Be sure to consider any lone pairs you added to the structure. The structure of cyanazine has 5 atoms highlighted. Atom 1 is an N atom bonded to 2 C atoms and 1 H atom through single bonds. Atom 2 is an N atom bonded to one C atom through a single bond and one C atom through a double bond. Atom 3 is a C atom bonded to one C l atom and one N atom through a single bond and one N atom through a double bond. Atom 4 is a C atom that is bonded to three C atoms and one N atom through single bonds. Atom 5 is a C atom that is bonded to one C atom through a single bond and one N atom through a triple bond. What is the hybridization of atom 1
Answer:
Sp3
Explanation:
According to the question, atom 1 is an N atom bonded to 2 C atoms and 1 H atom through single bonds.
Whenever nitrogen is bonded to three atoms via single bonds (in this case two carbon atoms and one hydrogen atom) the nitrogen atom is sp3 hybridized and in tetrahedral geometry. The lone pair on nitrogen atom occupies one of the hybrid sp3 orbitals.
Cyanazine is used as an herbicide to control the growth of weeds and annual grasses. The herbicide has been phased out due to increased toxicity to the environment and humans.
The hybridization of the molecule is sp³.
The given information in the question suggests that Nitrogen (atom 1) to two Carbon atoms and single bonded to 1 hydrogen atom.
The nitrogen is bonded with three single bonds, two with carbon and one with a hydrogen bond.
Based on the given data, the hybridization of the molecule will be sp³ and will have tetrahedral geometry. The lone pair present on the nitrogen atom will occupy one of the hybrid sp³ orbitals.
Therefore, the sp3 hybridization of the cyanazine molecule will exist.
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Predict the product for the following reaction:
Н,0, Н
ОН
ООО
ОН
The temperature of a container of oxygen gas is increased from 149 k to 298 k which of the following statement is true, Explain:
A. The average kinetic energy of the oxygen molecules in the container decreases.
B. The average chemical potential energy of the oxygen molecules in the container increases.
C. The average kinetic energy of the oxygen molecules in the container increases.
D. The average chemical potential energy of the oxygen molecules in the container decreases.
Answer:
The average kinetic energy of the oxygen molecules in the container increases
Explanation:
I searched up, "what happens when the temperature of oxygen gas is increased''
As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.
this is the answer google gave me so im not sure of you should 100% trust it but its better than nothing
The temperature of a container of oxygen gas is increased from 149 k to 298 k then the average kinetic energy of the oxygen molecules in the container increases. Thus option C is true.
What is kinetic energy?A kinetic energy is defined as a form of energy that an object or particle has by its motion.
It can be expressed as
K.E. = 1/2 mv²
There are basically three types of kinetic energy.
Translational kinetic energyRotational kinetic energyVibrational kinetic energyThe average kinetic energy is a product of half of the mass of each gaseous molecules.
The average kinetic energy is directly proportional to temperature.
Thus, the temperature of a container of oxygen gas is increased from 149 k to 298 k then the average kinetic energy of the oxygen molecules in the container increases. Thus option C is true.
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Which is a feature of a single replacement reaction?
Substance XYZ breaks down into X and YZ.
Substance G reacts with compound XY to form GY and X.
Substance X burns rapidly in the presence of oxygen.
Substance QR and GT exchange ions with each other.
Answer:
Substance G reacts with compound XY to form GY and X.
Explanation:
B. Substance G reacts with compound XY to form GY and X.
What is single replacement reaction?
A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound. When a replacement reaction occurs, a new aqueous compound and a different pure element will be generated as products.For example:2HCl(aq) + Zn(s) → ZnCl₂(aq) + H₂(g)
Therefore, correct option is B.
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Which structure is located at the base of the brain and receives neural signals about smell from the sensory receptors? A. olfactory cilia B. olfactory bulb C. olfactory cortex D. olfactory base
Answer:
B: Olfactory Bulb
Explanation:
edg2020
The olfactory bulb is located at the base of the brain and receives neural signals about the smell from the sensory receptors. Hence, option B is correct.
What are sensory receptors?Sensory receptors are dendrites of sensory neurons specialized for receiving specific kinds of stimuli.
There are two olfactory bulbs on the bottom side of the brain, one above each nasal cavity.
The olfactory bulbs receive information about smells from the nose and send it to the brain by way of the olfactory tracts.
Hence, option B is correct.
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A leaf change color is evidence of which type of chemical change?
Answer:
changes like leaves turning color in the fall are chemical changes. They involve chemical reactions. Bonds break in chemicals and new bonds form. Substances change into new chemical compounds.
Explanation:
100 POINTS & BRAINLIEST !!!! PLEASE HELP
Carbon, C, P Block, 2, 6, 12.0107u. 6 protons, 6 electrons, 6 neutrons
Helium, He, S Block, 1, 2, 4.0026u, 2 protons, 2 electrons, 2 neutrons
Germanium, Ge, P Block, 4, 32, 72.64u, 32 protons, 32 electrons, 41 neutrons
Oxygen, O, P Block, 2, 8, 16u, 8 protons, 8 electrons, 8 neutrons
Scandium, Sc, D Block, 4, 21, 44.9559u, 21 protons, 21 electrons, 24 neutrons
Tellurium, Te, P Block, 5, 52, 127.60u, 52 protons, 52 electrons, 76 neutrons
Hydrogen, H, S Block, 1, 1, 1.008u, 1 proton, 1 electron, 0 neutrons
Iron, Fe, D Block, 4, 26, 55.845u, 26 protons, 26 electrons, 30 neutrons
Beryllium, Be, S Block, 2, 4, 9.012u, 4 protons, 4 electrons, 5 neutrons
Vanadium, V, D Block, 4, 23, 50.942u, 23 protons, 23 electrons, 28 neutrons
Silver, Ag, D Block, 5, 47, 108u, 47 protons, 47 electrons, 61 neutrons
Gallium, Ga, P Block, 4, 31, 69.723u, 31 protons, 31 electrons, 39 neutrons
Bromine, Br, P Block, 4, 35, 79.904u, 35 protons, 35 electrons, 45 neutrons
Fluorine, F, P Block, 2, 9, 18.998u, 9 protons, 9 electrons, 10 neutrons
Manganese, Mn, D Block, 4, 25, 54.938u, 25 protons, 25 electrons, 30 neutrons
Strontium, Sr, S Block, 5, 38, 87.62u, 38 protons, 38 electrons, 50 neutrons
Francium, Fr, S Block, 7, 87, 223u, 87 protons, 87 electrons, 136 neutrons
Answer:
Carbon, C, P Block, 2, 6, 12.0107u. 6 protons, 6 electrons, 6 neutrons
Helium, He, S Block, 1, 2, 4.0026u, 2 protons, 2 electrons, 2 neutrons
Germanium, Ge, P Block, 4, 32, 72.64u, 32 protons, 32 electrons, 41 neutrons
Oxygen, O, P Block, 2, 8, 16u, 8 protons, 8 electrons, 8 neutrons
Scandium, Sc, D Block, 4, 21, 44.9559u, 21 protons, 21 electrons, 24 neutrons
Tellurium, Te, P Block, 5, 52, 127.60u, 52 protons, 52 electrons, 76 neutrons
Hydrogen, H, S Block, 1, 1, 1.008u, 1 proton, 1 electron, 0 neutrons
Iron, Fe, D Block, 4, 26, 55.845u, 26 protons, 26 electrons, 30 neutrons
Beryllium, Be, S Block, 2, 4, 9.012u, 4 protons, 4 electrons, 5 neutrons
Vanadium, V, D Block, 4, 23, 50.942u, 23 protons, 23 electrons, 28 neutrons
Silver, Ag, D Block, 5, 47, 108u, 47 protons, 47 electrons, 61 neutrons
Gallium, Ga, P Block, 4, 31, 69.723u, 31 protons, 31 electrons, 39 neutrons
Bromine, Br, P Block, 4, 35, 79.904u, 35 protons, 35 electrons, 45 neutrons
Fluorine, F, P Block, 2, 9, 18.998u, 9 protons, 9 electrons, 10 neutrons
Manganese, Mn, D Block, 4, 25, 54.938u, 25 protons, 25 electrons, 30 neutrons
Strontium, Sr, S Block, 5, 38, 87.62u, 38 protons, 38 electrons, 50 neutrons
Francium, Fr, S Block, 7, 87, 223u, 87 protons, 87 electrons, 136 neutrons
Explanation:
Write balanced, net ionic equations for the following precipitation, acidn base, or gasn forming reactions. Include states of matter. Hint: You should write the molecular equation first to predict the products. a) mixing aqueous solutions of iron (III) chloride and lithium sulfide b) mixing aqueous solutions of sodium acetate and ammonium phosphate c) mixing aqueous solutions of perchloric acid and potassium hydroxide d) mixing aqueous solutions of ammonia and nitric acid e) mixing aqueous solutions of nitrous acid and sodium hydroxide f) adding aqueous hydroiodic acid to solid calcium carbonate g) Problems c) through f) are acid- base reactions. Comment on the differences in the net ionic equations for these reactions.
Answer:
Explanation:
a ) 2FeCl₃ + 3Li₂S = Fe₂S₃ ( s ) + 6 LiCl
2Fe⁺³ + 6Li ⁻ + 6Cl⁻ + 3S⁻² = 6Li + 6Cl⁻ + Fe₂S₃ ( s )
b )
3CH₃COONa +( NH₄)₃PO₄ = 3CH₃COONH₄ + Na₃PO₄
3CH₃COO + 3Na⁺ + 3NH₄⁻ + PO₄⁺³ = 3CH₃COO⁻ +3NH₄⁺ + Na₃PO₄
c )
HClO₄ + KOH = kClO₄ + H₂O
H ⁺ + ClO₄⁻ + K⁺ + OH⁻ = k⁺ ClO₄⁻ + H₂O
d )
NH₄OH + HNO₃ = NH₄NO₃ + H₂O
NH₄⁺ + OH⁻ + H⁺ + NO₃⁻ = NH₄⁺ + NO₃⁻ + H₂O
e )
HNO₂ + KOH = KNO₂ + H₂O
H⁺ + NO₂⁻ + K⁺ + OH⁻ = K⁺ + NO₂⁻ + H₂O
f ) HIO₃ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃
H⁺ + IO₃⁻ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃
g )
c ) is strong acid and strong base
d ) is weak base and strong acid
e ) weak acid and strong base
f ) Strong acid and basic salt
