Answers
The central oxygen atom is a state of sp3 hybridization having only one available lone pair.
What is hybridization?The term hybridization refers to the mixing of two or more atomic orbitals to yield hybrid orbitals that are suitable for bonding.
Looking at the ion H3O^+, we can see that the central oxygen atom is a state of sp3 hybridization having only one available lone pair. The image of the ion is shown here.
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Related Questions
Explain how the period and group trends in atomic radii are related to electron configuration
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chemistry can someone solve this?
Answers
eimetchuinsumuleavtubronAnswer:
Explanation:
Determine the mass of hydrogen gas collected in a container if the gas occupies
44.8 L at STP.
Answers
Answer:
Hope this helps kinda got confused mid way
Explanation:
So the hydrogen sulphide is H2S for the molecular formula. Then the mass of hydrogen sulphide would be 1×2+32= 34g/mol At STP.
What is the volume of a 12.96 g sample of pure hydrogen gas?
Answers
The volume of the 12.96 g sample of pure hydrogen gas is 145.24 L
How to determine the mole of hydrogen gas
We'll begin by calculating the number of mole in 12.96 g hydrogen gas. This can be obtained as follow:
Mass of Hydrogen gas = 12.96 gMolar mass of hydrogen gas = 2 g/mol Mole of Hydrogen gas =?Mole = mass / molar mass
Mole of Hydrogen gas = 12.96 / 2
Mole of Hydrogen gas = 6.48 mole
How to determine volume of hydrogen gasTo determine the volume of the pure hydrogen gas, we shall assume that the gas is at standard temperature and pressure (STP). Thus, we shall apply the ideal gas equation as illustrated below:
Temperature (T) = STP = 273 KPressure (P) = STP = 1 atm Gas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) = 6.48 moleVolume (V) =?V = nRT / P
V = (6.48 × 0.0821 × 273) / 1
V = 145.24 L
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For the reaction:
H₂O(1)→ H₂O(g)
ΔΗ = 44 kJ
How much heat is required when 9.0 g of H₂O is used?
Answers
1mol H_2O requires 44kJ heat
Moles of water
Given mass/Molar mass9/181/20.5molHeat required
0.5(44)22kJAs per the reaction given
Moles of H_2O=1
∆H=44kJMoles of water in 9g
Given mass/Molar mass9g/18g/mol0.5mol∆H
44(0.5)22KJThe bright coloring of the skin of this poison dart frog announces, "Don't eat me! My
skin is poisonous."
This is an example of an adaptation that meets the challenge of...
maintaining structure
reproduction.
getting and using energy
Answers
What is the molecular weight of one mole of H₂CO3?
Answers
Answer:
The molecular weight 62,03 g/mol
The image shows a model of a nuclear reaction. Which objects could hit other atoms, producing a chain reaction?
Answers
The objects that could hit the atoms in the model shown are neutrons.
What is a chain reaction?A chain reaction is a reaction that is able to sustain itself. In this case, when the neutrons collide with the fissile nucleus, more neutrons are produced which collides with more fissile nuclei thereby sustaining the reaction.
Thus, the objects that could hit the atoms in the model shown are neutrons.
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Based on the following reaction, how much water is produced when oxygen react with 1 mole of C₂H8?
C₂H8 (g) + 40₂ (g) →2CO2 (g) + 4H₂O(g)
Answers
Answer:
4 moles
Explanation:
For every mole of deuteriomethane consumed, 4 moles of water are produced.
So, the answer is 4 moles.
How can we keep food fresh and cold without electricity?
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A gas cylinder contains 5.0 kg of propane. How many propane molecules are in the cylinder? The Avogadro constant, L = 6.022 x 1023 mol^-1
A 6.8 × 10^22
B 7.2 x 10^22
C 6.8 × 10^25
D 7.2 x 10^25
[1 mark]
Answers
Answer:
Here's your answer.
M(C3H8) = 44 g/mol
n(C3H8) = 5000 (g)/44 (g/mol) = 113,6 mol
[tex] N = n \times N_{a} = 113,6 \times 6,02 \times {10}^{23} \\ \\ = 684,1 \times 10 ^{23} \sf{molecules} [/tex]
Hope it helps you from my sideUse Boyle's Law to interpret the following problem and then select the correct answer below.
A 1 L compressed tank is filled with Hydrogen gas and has a pressure of 100kPa. If all of the Hydrogen gas is removed from the tank and pumped into a 250mL tank what happens to the pressure?
Question 1 options:
The pressure in the 1 L tank increases.
None of the above.
The pressure in the 250mL tank increases.
All of the above.
The pressure in the 250 mL tank decreases.
Answers
The pressure of the compressed tank that was initially filled with hydrogen gas and has a pressure of 100kPa is pressure in the 250mL tank increases.
What is Boyle's law?Boyle's law states that the observation that the pressure of an ideal gas is inversely proportional to its volume at constant temperature.
According to this question, a 1 L compressed tank is filled with hydrogen gas and has a pressure of 100kPa.
If all of the hydrogen gas is removed from the tank and pumped into a 250mL tank, which is smaller in volume, the pressure in the 250mL tank increases.
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7. Write the equation for the positron emission of barium-127.
Answers
The reaction is given by
[tex]\\ \rm\Rrightarrow {}^{127}_{56}Ba\longrightarrow {}^{0}_{+1}\beta+{}^{127}_{55}Cs[/tex]
Barium goes underneath beta decay to form Ceaseum
Cs is very mellable elementIt can melt on your hand[tex]\sf {}^{127}_{56}Ba\longrightarrow {}^0_{1}\beta+{}^{127}_{55}Cs[/tex]
Remember
Radioactive decays are first order reactionsThe rate constant doesn't depend upon initial concentrationIt's never ending reactionFor the reaction
2A(g)+2B(g)+C(g)⟶3G(g)+4F(g)
the initial rate data in the table was collected, where [A]0 , [B]0 , and [C]0 are the initial concentrations of A , B , and C , respectively.
Experiment [A]0 (mmol⋅L−1) [B]0 (mmol⋅L−1) [C]0 (mmol⋅L−1) Initial rate (mmol⋅L−1⋅s−1)
1 11.0. 200.0 220.0 8.80
2 22.0 200.0 165.0 17.6
3 22.0 400.0 55.0 70.4
4 11.0 200.0 110.0 8.80
Reactant A is first order reactant, Reactant B is second order reactant, and Reactant C is zero order reactant...
1. What is the overall order of the reaction ______ ???
2. Write the rate law for the reaction where is the rate constant. Rate = k___???
3. Calculate the rate constant, , and identify its units. K = ____?????
4. Determine the initial rate of the reaction when [A]0=4.87 mmol⋅L−1 , [B]0=0.184 mmol⋅L−1 , and [C]0=12.0 mmol⋅L−1 . Initial Rate = _______ mmol⋅L−1⋅s−1 ??????
Answers
The overall order of the reaction is 3 and the rate law for the reaction is rate = [A]^n [B]^m [C]^l
How to find the Order of Reaction?
1) The order of reactant A is first order reactant because a first-order reaction can be defined as a chemical reaction in which the reaction rate is linearly dependent on the concentration of only one reactant.
The order of reactant B is second order reactant because a second order reaction is a type of chemical reaction that depends on the concentrations of one-second order reactant or two first-order reactants.
Thus, the overall order of the reaction is 3.
2) The rate law in this reaction is;
rate = [A]^n [B]^m [C]^l
But in this question, since the reactant C is zero order, then it will be simplified to; rate = k[A][B]² .
3) When we plug in the initial concentrations of A and B, we will get the rate constant of the problem which is k = 20.
4) The initial rate when [A]0=4.87 mmol⋅L−1 , [B]0=0.184 mmol⋅L−1 , and [C]0=12.0 mmol⋅L−1 is;
Rate = 20 * 4.87 * 0.184²
Rate = 3.3
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Which are stronger, ionic bonds or covalent bonds?
Answers
Answer:
ionic bonds
Explanation:
ionic bonds result from the mutual attraction between oppositely charged ions. They tend to be stronger than covalent bonds due to the coulombic attraction between ions of opposite charges.
what effect does a catalyst have on a reaccion rate an the products formed in a reaccion
Answers
okay so if i fail the first time do i repeat the class? or can my teacher still pass me even if i pass the class but fail the test?
Answers
Answer:
It depends on what type of test your speaking of, is it a state exam?
If you are passing a class and fail a test you will still pass. If you fail a class you do not need to take it again if you don't want to but you would have to take another class instead.
Which of the following is a heterogeneous mixture?
a) salt water
b) soil
c) steel
d) air
Answers
Answer:
b) soil
heterogenous means you can pick out individual bits.
how many atoms are there in 56 moles of silver
Answers
Answer:
3.4 x 10²⁵ atoms Ag
Explanation:
To find the amount of silver (Ag) atoms, you need to use Avogadro's number to convert between moles and atoms. Make sure to arrange the ratio in a way that allows for the cancellation of moles. The final answer should have 2 sig figs to correlate with the number of sig figs in the given value (56 = 2 sig figs).
Avogadro's number:
6.022 x 10²³ atoms = 1 mole
56 moles Ag 6.022 x 10²³ atoms
-------------------- x ---------------------------------- = 3.4 x 10²⁵ atoms Ag
1 mole
what is the definition of oxidation
Answers
Answer:
oxidation is an energy that produces reaction in a living cell.
Answer:
the process or result of oxidizing or being oxidized.
Explanation:
Pulses A, B, C, and D all travel at 10 m/s on the same string but in opposite directions. The string is depicted at time t=0 in (Figure 1). The small pulses have an amplitude of 2.0 cm, and the large pulse has an amplitude of 4.0 cm.
A) Find the displacement of point P at time t=0.10s .
B) Find the displacement of point P at time t=0.20s .
Answers
(a) The displacement of point P at time t=0.10s is determined as +2cm.
(b) The displacement of point P at time t=0.20s is determined as -2cm.
What is displacement?Displacement is the change in position of an object. It is obtained from the product of velocity and time of motion.
x = vt
Displacement of the waves after 0.1 sx = 10 m/s x 0.1 s = 1 m
Each wave will travel 1 m to the right or to the left, depending on the initial direction.
wave B from left will stop at point 0 mwave A from left will stop at point -1 mwave C from right will stop at point 0 mwave D from right will stop at point + 1 mwave B and C superimposed and the displacement will be between A and D.
Amplitude of A = - 2cm
Amplitude of D = + 4cm
Displacement of point P = 4 cm - 2 cm = 2cm
Displacement of the waves after 0.2 sx = 10 m/s x 0.1 s = 2 m
Each wave will travel 2 m to the right or to the left, depending on the initial direction.
wave B from left will stop at point 1 mwave A from left will stop at point 0 mwave C from right will stop at point -1 mwave D from right will stop at point 0 mDisplacement of point P = (amplitude B + amplitude C) + (amplitude A + amplitude D)
Displacement of point P= (2cm - 2cm) + (2 cm - 4cm)= -2cm
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when energy is transferred does it increase or decrease
Answers
Answer:
About energy transfers:
Explanation:
When there is an energy transfer energy is neither created, nor destroyed. This means when that when one energy store decreases, one or more others must increase.
How many moles of a gas can be contained in a 1600-cm° flask at 25°C and 75 kPa?
Answers
Volume=1600cm³=1.6dm³=1.6L
Temperature=25°C=273+25=298K
Pressure=75000Pa
Now
Apply ideal gas equation
PV=nRTn=PV/RTn=75000(1.6)/8.314(298)n=48.43molThe number of moles needed is
n=48.43mol.
Calculations
Given the values of the volume and temperature, we would convert them to the required units.
Volume=1600cm³=1.6dm³=1.6L
Temperature=25°C=273+25=298K
Pressure=75000Pa
We would use the ideal gas equation
PV=nRT
n=PV/RT
n=75000(1.6)/8.314(298)
n=48.43mol
Two substances both exhibit hydrogen bonding Substance A has a boiling point of 78.4°C. Substance B has a boiling point of
100°C. Which statement correctly compares the substances? (1 point)
O Substance A has stronger bonds, and it takes less energy to undergo a phase change.
O Substance B has stronger bonds, and it takes less energy to undergo a phase change.
O Substance B has stronger bonds, and it takes more energy to undergo a phase change.
O Substance A has stronger bonds, and it takes more energy to undergo a phase change.
Answers
Answer: Substance B has stronger bonds, and it takes more energy to undergo a phase change.
Explanation:
Substances with higher boilings have stronger intermolecular forces, and thus require more energy for phase changes to occur.
What is the pH of a solution with a pOH of 10?
Answers
The pH of the solution is 4.
What is pH value ?pH value is the measure of the acidity and basicity of a solution.
It measures the [H+] ion liberated by an acid when dissolved in a solution.
It has a range of 0 to 14 , where 0 to 6.9 indicates acidity , 7 represents neutral solution , More than 7 up to 14 indicates alkaline solutions.
pH value is also used to predict the completion of a reaction .
It is given in the question that
The value of pOH = 10
pH = ?
It is known that the sum of pH and pOH is equal to 14.
pH + pOH = 14
pH + 10 = 14
pH = 4
Therefore the pH of the solution is 4.
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Which of the following best describes physical science?
O A.
the study of motion
the study of matter and energy
the study of Earth's structure and processes
the study of reactions
the study of living things
OB.
O C.
OD.
OE.
Answers
The study of matter and energy best describes physical science. Hence, option B is correct.
What is physical science?Physical science is the study of the inorganic world.
Physics is a branch of science that studies matter and its motion through space and time, along with related concepts such as energy and force. Physics is one of the "fundamental sciences" because of the other natural sciences (like biology, geology etc.)
Thus the study of matter and energy best describes physical science. Hence, option B is correct.
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A solid, whose original weight was 8.492 grams, was dissolved in water. The
water solution was evaporated down to a small volume, then allowed to sit in a lab
drawer for a week. The resulting weight of the recovered solid was 9.045 grams.
a) Calculate the perfect recovery of the solid ._____
b) Give at least one reason why the percent recovery was greater than 100.0%
Answers
Answer:
See below
Explanation:
9.045/8.492 * 100% = 106.5%
There was other solids already dissolved in the water, or dust or other contaminants got into the water. ....or the measurement was incorrect. (like maybe the solid was still wet?)
Answer:
dfgdsgdffgfddffg
Explanation:
dfggffgdgdf
What is the pH of a solution that contains 0.0011 moles of KOH in 393 mL of solution?
Answers
The pH of a solution that contains 0.0011 moles of KOH in 393 mL of solution is 2.56. Details about pH can be found below.
How to calculate pH?The pH of a solution can be calculated using the following expression:
pH = - log [H3O+]
However, the hydrogen concentration of the KOH solution can be calculated as follows:
concentration = 0.0011 mol ÷ 0.393 L
concentration = 2.798 × 10-³M
The pH of KOH = - log [2.798 × 10-³M]
pH = 2.56
Therefore, the pH of a solution that contains 0.0011 moles of KOH in 393 mL of solution is 2.56.
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Write the complete chemical equations for production of pentanol from pentene
Answers
Answer:
hope this helped :( got this from my friend a long time ago but still not sure if it's really correct this
A The weak base ionization constant (Kb) for CH3NH2 is equal to: B [CH3NH3+][OH-] [CH3NH₂] [CH3NH3 +][OH [CH3NH2][N2 O]
Answers
The weak base ionization constant (Kb) for [tex]CH_3NH_2[/tex] is equal to
[tex]Kb = [CH_3NH^{3+}] [OH^-] / [CH_3NH_2][/tex]
What is Kb?Kb is the base dissociation constant.
The expression for the equilibrium constant, Kb is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.
[tex]CH_3NH_2(aq) + H_2O(l)[/tex] → [tex]CH_3NH^{3+}(aq) + OH^- (aq)[/tex]
Thus, the expression for the equilibrium constant, Kb fo the above reaction can be written as follow:
[tex]Kb = [CH_3NH^{3+}] [OH^-] / [CH_3NH_2][/tex]
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