Refer to the attachment
According to the molecular geometry, bonds in carbon tetrachloride are polar and that in nitrogen are non polar.
What is molecular geometry?Molecular geometry can be defined as a three -dimensional arrangement of atoms which constitute the molecule.It includes parameters like bond length,bond angle and torsional angles.
It influences many properties of molecules like reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.
They provide information about geometry by taking into considerations the vibrational and rotational absorbance of a substance.Neutron and electron diffraction techniques provide information about the distance between nuclei and electron density.
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Analysis of a sample of a compound composed of carbon, hydrogen, and oxygen shows that the sample contains 18.80 g of C, 2.367 g of H, and 25.04 g of O. The properties of the compound suggest that the molar mass should be 59.04 g/mol. How many carbon atoms are there in one molecule of the compound
Answer:
Analysis of a sample of a compound composed of carbon, hydrogen, and oxygen shows that the sample contains 18.80 g of C, 2.367 g of H, and 25.04 g of O.
The properties of the compound suggest that the molar mass should be 59.04 g/mol.
How many carbon atoms are there in one molecule of the compound?
Explanation:
Empirical formula mass is
\((12g/mol*2)+(1.0g/mol*3)+(16.0g/mol*2)\\=59.0g/mol\\\)
Empirical formula mass =molecular formula mass
Hence,
empirical formula is same as molecular formula.
That is --- \(C_2H_3O_2\).
So, the molecule has two carbon atoms in one molecule of the compound.
PLEASE HELP QUICKK
Calculate the energy of combustion for one mole of butane if burning a 0.367 g sample of butane (C4H10) has increased the temperature of a bomb calorimeter by 7.73 °C. The heat capacity of the bomb calorimeter is 2.36 kJ/ °C.
The energy of combustion for one mole of butane to be approximately 2888.81 kJ/mol.
To calculate the energy of combustion for one mole of butane (C4H10), we need to use the information provided and apply the principle of calorimetry.
First, we need to convert the mass of the butane sample from grams to moles. The molar mass of butane (C4H10) can be calculated as follows:
C: 12.01 g/mol
H: 1.01 g/mol
Molar mass of C4H10 = (12.01 * 4) + (1.01 * 10) = 58.12 g/mol
Next, we calculate the moles of butane in the sample:
moles of butane = mass of butane sample / molar mass of butane
moles of butane = 0.367 g / 58.12 g/mol ≈ 0.00631 mol
Now, we can calculate the heat released by the combustion of the butane sample using the equation:
q = C * ΔT
where q is the heat released, C is the heat capacity of the calorimeter, and ΔT is the change in temperature.
Given that the heat capacity of the bomb calorimeter is 2.36 kJ/°C and the change in temperature is 7.73 °C, we can substitute these values into the equation:
q = (2.36 kJ/°C) * 7.73 °C = 18.2078 kJ
Since the heat released by the combustion of the butane sample is equal to the heat absorbed by the calorimeter, we can equate this value to the energy of combustion for one mole of butane.
Energy of combustion for one mole of butane = q / moles of butane
Energy of combustion for one mole of butane = 18.2078 kJ / 0.00631 mol ≈ 2888.81 kJ/mol
Therefore, the energy of combustion for one mole of butane is approximately 2888.81 kJ/mol.
In conclusion, by applying the principles of calorimetry and using the given data, we have calculated the energy of combustion for one mole of butane to be approximately 2888.81 kJ/mol.
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PLZ HELP IM GIVING 50 FRICKING POINTS. NO WRONG ANSWERS PLZ
Answer:
I think it's B
Explanation:
I dont have much experience with the periodic table, but I just think its B.
Answer:
it's either B or C
Explanation:
I don't have that much experience for this but im giving you my honest answer i hope this will help ;3
Hydroboration can occur when alkenes react with borane. Borane is highly unstable so it exists as diborane or is stabilized with THF or DMS. To simplify this question we will consider borane as the reactive reagent.
Hydroboration addition of borane to a compound across the double bond.
What is hydroboration?The reaction that is called hydroboration could be carried out with an alkene or an alkyne as the case maybe. In each case, the reaction involves the addition of borane to a compound across the double bond. The reaction could further proceed to produce an alkanol.
Let us restate that like most of the organic reactions, this reaction occurs in a sequence of steps and each step of the reaction has a way of bringing us closer to the end product of the entire steps of the reaction take in proper order
As shown in the image attached to this answer, the reaction was carried out in DMS in order to stabilize the borane. We have shown the borane to be a reactant as it adds across the double bond to yield the product.
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what is the change in the velocity of the biker below as he travels from point b to point c ? ..... What is his acceleration from point b to point c ?
The change in the velocity = 4 m/s
Acceleration = 4 m/s²
Further explanationGiven
vo = initial velocity = 4 m/s
vf = final velocity = 8 m/s
t = 1 s
Required
The change in the velocity
Acceleration
Solution
the change in velocity =
\(\tt vf-vo=8-4=4~m/s\)
Acceleration = ratio of a change in velocity and the time
\(\tt a=\dfrac{\Delta v}{t}= \dfrac{vf-vo}{t}\)
Input the value :
\(\tt a=\dfrac{4~m/s}{1~s}=4~m/s^2\)
The mass of a solid substance is 21.112 g. If the volume of the solid substance is 19.5 cm3, calculate the density of the substance (in g/cm3) with the correct number of significant digits. The density is g/cm3.
Answer:
ρ = 1.08 g/cm³
Explanation:
Step 1: Given data
Mass of the substance (m): 21.112 g
Volume of the substance (V): 19.5 cm³
Step 2: Calculate the density of the substance
The density (ρ) of a substance is equal to its mass divided by its volume.
ρ = m / V
ρ = 21.112 g / 19.5 cm³
ρ = 1.08 g/cm³
The density of the substance is 1.08 g/cm³.
Does the bubbling that occurs when the methanol is added to the dry sand indicate that the sand and methanol are reacting
It's in the last paragraph of this website.
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The bubbling that occurs when the methanol is added to the dry sand indicate that there is no chemical reaction between sand and methanol rather it is just methanol displacing air between sand .
What is chemical reaction?Chemical reactions are defined as reactions 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 reaction.
There are several characteristics of chemical reactions 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.
There are three types of chemical reactions:
1) inorganic reactions
2)organic reactions
3) biochemical reactions
During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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Compare and contrast H1 ,H2, H3 help asap
The comparison of H1 H2 and H3 tags is that:
The H1 is seen as the central keywords and also the subject matter, It is seen as what the total post is about. The H2 is seen as the part to break up content, via the use of the same keywords to the H1 tag. H3 is known to be the Subcategories that is used to further break down the content, and this tends to make it to be scannable more faster and more easily.What are the tags about?There are a lot of different HTML headings and they are: H2 and H3, H4, H5, H6, etc.
The use of H1 tags is said to be the one that is often used to show all that a person will get if they click on the title. It is seen as the main keywords that will appear in a sequence to bring in one's target audience.
Therefore, The comparison of H1 H2 and H3 tags is that:
The H1 is seen as the central keywords and also the subject matter, It is seen as what the total post is about. The H2 is seen as the part to break up content, via the use of the same keywords to the H1 tag. H3 is known to be the Subcategories that is used to further break down the content, and this tends to make it to be scannable more faster and more easily.Learn more about tags from
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Suppose that Biuret reagent turns purple when it is added to an unknown substance. What can you conclude about the substance?
Answer:
the unknown substance is a protein
Explanation:
The biuret test is one of the tests for proteins. It can be used to detect peptide linkages. The biuret test is carried out in an alkaline solution. A coordination complex is formed leading to the appearance of a violet color.
Summarily, the biuret method is a colorimetric technique used to test for proteins and peptides. It involves the formation of a purple (violet) complex of Copper salts in alkaline solution.
Hence when the biuret reagent is added to an unknown substance and it turns purple, the unknown substance is a protein
Please explain using Newton’s Laws of Motion (All of them) what happens when a car hits an SUV on the street, given that the first vehicle (car) is moving, while the second vehicle (SUV) is standing still. You may decide which way the SUV moved and how it hits the car, but you have to explain this in this assignment.
According to Newton's second law, force equals mass multiplied by acceleration. As a result, in a car accident, the force exerted by the vehicle and its occupants decreases as the time required for the vehicle to stop increases.
What is Newton's second law?We clearly observed in the Exploration that when two cars collide, each feels a force from the other.
According to Newton's third law, when one object exerts a force on another, the second object feels an equal and opposite force exerted by the first object. This is very clear in the two-object collision.
The force with which your body is struck in a collision is referred to as crash force. Crash force is equal to your body weight multiplied by the vehicle's speed.
Newton's second law states that force equals mass multiplied by acceleration. As a result, the force exerted by the vehicle and its occupants in a car accident decreases as the time required for the vehicle to stop increases.
Thus, this way it hits the car.
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Calculate the molarity of 1 L of water at 20 °C given a density of 0.9982 g/mL.
Answer:
I have the same thing
Explanation:
Which element has 38 protons and 50 neutrons? __________________
What is its mass number? __________________
What group is this element in? __________________
What is the family name for this group? __________________
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, Strontium belongs to group 2, alkaline earth metal family of the periodic table.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.
Strontium is the element having 38 protons and 50 neutrons.
mass number= proton number + neutron number
=38+ 50
=88
Group number of this element is group 2. Strontium belongs to akaline earth metal family.
Therefore, Strontium belongs to group 2, alkaline earth metal family of the periodic table.
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According to Charles's Law, ________ and ___________ are directly proportional, with ______________ being the constant.
Answer: A) Volume of a gas B) Number of molecules C) temperature &pressure
Explanation: The law also states that the Kelvin temperature and the volume will be in direct proportion when the pressure exerted on a sample of a dry gas is held constant.
The largest source of power generated in the US is
A)
fossil fuel combustion.
B)
nuclear.
C)
solar.
D)
wind.
Answer:
A. fossil fuel combustion
Explanation:
If 7 mol of copper reacts with 4 mol of oxygen, what amount of copper (II) oxide is produced? What amount of the excess reactant remains?
Answer:
7 mol CuO
0.5 mol O₂
Explanation:
Step 1: Write the balanced equation
2 Cu + O₂ ⇒ 2 CuO
Step 2: Identify the limiting reactant
The theoretical molar ratio (TMR) of Cu to O₂ is 2:1.
The experimental molar ratio (EMR) of Cu to O₂ is 7:4 = 1.75:1.
Since TMR > EMR, Cu is the limiting reactant
Step 3: Calculate the amount of CuO produced
7 mol Cu × 2 mol CuO/2 mol Cu = 7 mol CuO
Step 4: Calculate the excess of O₂ that remains
The amount of O₂ that reacts is:
7 mol Cu × 1 mol O₂/2 mol Cu = 3.5 mol O₂
The excess of O₂ that remains is:
4 mol - 3.5 mol = 0.5 mol
Given the following electronic configuration of neutral atoms, identify the element and state the number of unpaired electrons in its ground state. Example: [He]2s1 Answer: Li, 1 (one space between the comma and the number):
[Ar]4s13d5
The electronic configuration [Ar]4s13d5 corresponds to the element Manganese (Mn) in its ground state.
To determine the number of unpaired electrons, we need to first fill the 4s and 3d orbitals according to the Aufbau principle and Hund's rule. The 4s orbital can hold up to 2 electrons, and the 3d orbital can hold up to 10 electrons. In the case of Mn, the [Ar] noble gas configuration represents the completely filled inner shells, so we start by adding 4s1 electron and then 5 more electrons to the 3d orbital. We have:
1s2 2s2 2p6 3s2 3p6 4s1 3d5
We can see that there are five unpaired electrons in the 3d orbital (in the d-subshell, there are five unpaired electrons in the five available d-orbitals), which makes manganese a transition metal. Therefore, the number of unpaired electrons in the ground state of manganese is 5.
So, the answer is: Mn, 5.
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what is the element for gas
Answer:
If by gas you mean oxygen it is O.
What mass (grams) of sodium sulfate would be formed by the complete reaction of 120.0 grams of sodium hydroxide?
Answer:
The mass of sodium sulfate formed by the comolete reaction of 120.0 grams of sodium hydroxide is 142.04 grams.
Explanation:
The balanced chemical equation for the reaction between sodium hydroxide and sulfuric acid is:
2NaOH + H2SO4 -> Na2SO4 + 2H2O
From the equation, we can see that 2 moles of sodium hydroxide react with 1 mole of sulfuric acid to form 1 mole of sodium sulfate. We can use this information, along with the molar masses of the compounds, to calculate the mass of sodium sulfate formed.
First, we need to convert the given mqss of sodium hydroxide to moles. The molar mass of sodium hydroxide is 40.00 g/mol, so:
Moles of NaOH = Mass of NaOH / Molar mass of NaOH
Moles of NaOH = 120.0 g / 40.00 g/mol
Moles of NaOH = 3.00 mol
Next, we can use the mole ratio from the balanced equation to calculate the moles of sodium sulfate formed:
Moles of Na2SO4 = Moles of NaOH / 2
Moles of Na2SO4 = 3.00 mol / 2
Moles of Na2SO4 = 1.50 mol
Finally, we can convert the moles of sodium sulfate to grams using its molqr mass of 142.04 g/mol:
Mass of Na2SO4 = Moles of Na2SO4 x Molar mass of Na2SO4
Mass of Na2SO4 = 1.50 mol x 142.04 g/mol
Mass of Na2SO4 = 213.06 g
Therefore, the mass of sodium sulfate formed by the complete reaction of 120.0 grams of sodium hydroxide is 213.06 grams.
1. How many moles of carbon dioxide are produced by the decomposition of 25.1 grams of sodium
carbonate (Na₂CO,)?
(6 pts. /2 pts. for equation - 3 pts. for stoich - 1 pt. final answer)
2.33 moles of carbon dioxide are produced by the decomposition of 25.1 grams of sodium.
Molarity is a physical quantity that describes the substance's number of moles available in the unit liter volume of the solution. A mole per liter is a measurable unit to explain molarity.
Number of moles of the NaCl is
np = 3.50 mol
The volume of the solution is np = 1.50 L
The expression for the molarity solution is cm = np/vp
At the value and get the above expression
Cm = 3.50/ 1.50
= 2.33 mol /L
Thus the molarity of the solution is 2.33 mol /L
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Which of the following formulas is incorrect?
AlBr3
MgS
LI20
NaOH
CaNO3
Answer:
The incorrect formula among the options is LI20.
Explanation:
Li2O is the proper formula for lithium oxide, a substance made up of lithium and oxygen.
Hope it helps! : )What is the median reaction of second end point in HCL and NaOH titration
The median reaction at the second end point in the HCl and NaOH titration is: HCl + NaOH → NaCl + H2O
In a titration between hydrochloric acid (HCl) and sodium hydroxide (NaOH), the reaction involved is the neutralization reaction between an acid and a base. The balanced equation for this reaction is:
HCl + NaOH → NaCl + H2O
In this reaction, one mole of HCl reacts with one mole of NaOH to form one mole of NaCl (sodium chloride) and one mole of water.
During the titration process, the reaction occurs gradually as the base is added to the acid solution.
The first end point of the titration is reached when the moles of HCl and NaOH are stoichiometrically equivalent, meaning they react in a 1:1 ratio. At this point, all the HCl has been neutralized by the NaOH, and no excess of either reagent remains.
However, if the titration is continued beyond the first end point, the reaction between HCl and NaOH can still occur, albeit in a different ratio.
The second end point refers to the point where the moles of NaOH added exceed the stoichiometrically required amount to neutralize the HCl completely. As a result, any excess NaOH added after the second end point reacts with the excess HCl in a 1:1 ratio.
Therefore, the median reaction at the second end point in the HCl and NaOH titration is:
HCl + NaOH → NaCl + H2O
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what is western science
Answer:
Science or Western science is the system of knowledge which relies on certain laws that have been established through the application of the scientific method to phenomena in the world around us. ... Depending on the test results, the hypothesis can become a scientific theory or 'truth' about the world.
Explanation:
A lab technician added 2.5 L of water to 0.5 L of
8.50 M solution. What is the new molar
concentration (M) of the diluted solution?
The new molar concentration (M) of the diluted solution when added 2.5L of water to 0.5 L of 8.50 M solution is 1.42M.
How do we calculate the molar concentration of solution?Molar concentration of the solution will be calculated by using the below equation:
M₁V₁ = M₂V₂, where
M₁ = initial concentration of solution = 8.50 M
V₁ = initial volume = 0.5 L
M₂ = final concentration of diluted solution = ?
V₂ = final volume of diluted solution = 0.5 + 2.5 = 3 L
On putting values, we get
M₂ = (8.50)(0.5) / (3) = 1.416 = 1.42 M
Hence required molar concentration of dilute solution is 1.42M.
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1. Explain how you would determine the enthalpy of reaction for the hypothetical reaction A2X4(l) + X2(g) → 2AX3(g) using the following information. You do not need to calculate an answer. Respond to the prompt with a minimum response length of 50 words.
we can determine the enthalpy of reaction for the hypothetical reaction A2X4(l) + X2(g) → 2AX3(g) using the following steps:
write the balanced chemical equation for the reactionwe obtain the standard enthalpies of formation for each compoundwe apply Hess's law calculate the enthalpy of reactionwe then add up the changes to get the total enthalpy change for the reaction State Hess law?Hess's Law of Constant Heat Summation states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes.
The law is Hess's Law of Constant Heat Summation is described as a manifestation that enthalpy is a state function.
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electrons are transferred from atoms of phosphorus to atoms of sodium
Electrons are transferred from atoms of sodium to atoms of phosphorous The sodium atom looses electron and the phosphorus atoms gains electrons.
What is an electron ?The electron is a subatomic particle with an elementary electric charge of -1. Electrons are the first generation of the lepton particle family and are widely regarded as elementary particles due to the lack of known components or substructure.
This transfer causes the sodium atoms to acquire positive charge and phosphorous to acquire negative charge .
Thus, the sodium and phosphorus atoms strongly attract with each other.
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Your question is incomplete, most probably, your question was
Complete the paragraph about the formation of sodium phosphide.
Electrons are transferred from atoms of
and the phosphorus atoms
to atoms of
C. This transfer makes the sodium atoms
As a result, the sodium and phosphorus atoms strongly
each other.
How many grams of NaCl
You would recover 36.525g of NaCl after evaporating all of the water.
How to find the how many grams of NaCl that would be recover when all water is evaporated off of this solution?To find the grams of NaCl that would be recovered after evaporating all the water, we can use the following formula:
mass = moles * molar mass
Where:
Moles = Molarity * Volume
Molarity = 0.250 M
Volume = 2500.0 mL = 2.5 L
Molar mass of NaCl = 58.44 g/mol
mass = 0.250 M * 2.5 L * 58.44 g/mol
mass = 36.525 g
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3
Solve and derive the unit for Power
Answer:
Unit of power is watt
Explanation:
Power = rate of doing work
or
Power, P = W/t
Where
W is work done and t is time
The unit of work done is Joules and that of time is seconds.
Power, P = J/s
We know that, J/s = watts
Hence, the unit of power is watts.
Vitamin D is produced in the skin when 7-dehydrocholesterol reacts with UVB rays (ultraviolet B) having wavelengths between
270 nm and 300 nm. What is the energy range Emin < E< Emax of the UVB photons?
The energy range expected is 6.6 × 10^-19 J < E < 7.33 × 10^-19 J
The energy of the photon is given by;
E = hc/λ
E = energy of the photon
h = Plank's constant
c = speed of light
λ = wavelength of light
For the upper boundary range;
E = ?
h = 6.6 × 10^-34 Js
c = 3 × 10^8 m/s
λ = 270 × 10^-9
E = 6.6 × 10^-34 Js × 3 × 10^8 m/s / 270 × 10^-9
E = 7.33 × 10^-19 J
For the lower range;
E = ?
h = 6.6 × 10^-34 Js
c = 3 × 10^8 m/s
λ =300 × 10^-9
E = 6.6 × 10^-34 Js × 3 × 10^8 m/s / 300 × 10^-9
E = 6.6 × 10^-19 J
Hence, the energy range 6.6 × 10^-19 J < E < 7.33 × 10^-19 J
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a fisherman in a boat is drinking a of hot coffee. the large lake below his boat is full of cold water. which statement is an accurate comparison of the lake water and the coffee?
Answer:
see below
Explanation:
The lake will have more total thermal energy but the particles in the coffee will be moving faster.
A comparison of hot coffee and cold lake is, the heat from the coffee will be absorbed by the cold lake through convection method of heat transfer.
Conservation of energy
The principle of conservation of energy states that the total energy of an isolated system is always conserved.
Heat lost by the hot coffee = Heat absorbed by the cold lake
Heat transfer processHeat from the coffee will be absorbed by the cold lake through convection method of heat transfer.
Thus, a comparison of hot coffee and cold lake is, the heat from the coffee will be absorbed by the cold lake through convection method of heat transfer.
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An ideal solution consisting of 79 wt% benzene (C6H6) and 21 wt% toluene (C7H8) was heated in a closed vessel to 50 ºC. What is the mole fraction of benzene in the vapour phase when equilibrium was reached at 50 ºC? Round your answer to two significant figures.
Data: Vapour pressure of benzene at 50 ºC = 271 mmHg
Vapour pressure of toluene at 50 ºC = 91.5 mmHg
In this case, according to the Raoult's law, we can find the mole fraction of 79 wt% benzene and 21 wt% toluene at 50 °C in the vapor phase as follows:
\(y_iP=x_iP_i\)
However, we first have to calculate the mole fractions in the solution as follows (b stands for benzene and t for toluene):
\(\\x_b=0.79\frac{g\ benzene}{g\ solution} *\frac{(78.11*x_b+92.14*x_t)}{1mol\ solution} *\frac{1mol\ toluene}{78.11g\ toluene} \\\\x_b=0.79\frac{g\ benzene}{g\ solution} *\frac{78.11*x_b+92.14*(1-x_b)}{1mol\ solution} *\frac{1mol\ toluene}{78.11g\ toluene}\\\\x_b=0.79*(x_b+1.18*(1-x_b))\\\\x_b=0.79x_b+0.932-0.932x_b\\\\x_b=\frac{0.932}{1+0.932-0.79} =0.816\\\\x_t=1-x_b=1-0.816=0.184\)
Next, we calculate the total pressure as follows, according to the Dalton's law:
\(P=x_bP_b+x_tP_t=0.816*271mmHg+0.184*91.5mmHg=237.972mmHg\)
Finally, the mole fractions of the vapor phase turn out:
\(y_b=\frac{0.816*271mmHg}{237.972mmHg}=0.929\\\\y_t=1- 0.929=0.071\)
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