Answer:
True
Explanation:
When determining rate law, the coefficients in the balanced equation are used to determine how different concentrations affect the rate.
Location E is located at the Tropic of Cancer, while location F is at the equator. Which location is likely to be warmer at the start of the summer in June? Location E, because Earth is receiving equal sunlight throughout Location F, because Earth is receiving equal sunlight throughout Location E, because Earth's axis is tilted towards the sun Location F, because Earth's axis is tilted away from the sun
The answer is "Location E, because Earth's axis is tilted towards the sun" :D
Answer:
C. Location E, because earth's axis is tilted towards the sun
Explanation:
determine the next term in the geometric sequence. 1/2, 1/3, 2/9,4/27
Geometric progression is a sequence that can be found by multiplying the same value by the preceding number. The next term in the sequence is 8 / 81.
What is geometric progression?A geometric progression is a sequence of numbers other than 0 and can be estimated by multiplying a specific digit by the prior number. It is given as,
an = a₁rⁿ⁻¹
Where r is the common ratio or the number.
For the given sequence the common ratio (r) is 2/3.
Substituting values:
an = (1/2) × (2/3)ⁿ⁻¹
Applying r:
an=2ⁿ⁻¹ / 2 × 3ⁿ⁻¹
Substitute n to find the nth term as:
a₅=2⁽⁵⁾⁻²/ 3⁽⁵⁾⁻¹
a₅=8/ 3⁽⁵⁾⁻¹
a₅ = 8/ 81
Therefore, the next number on the sequence is 8/81.
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2H2 + O2 + 2H2O
How many moles of oxygen are needed to produce 10 L of H2O at STP?
Answer:
V=10 l H2O
VM=22.4 l/mole
n=V/Vm=0.446 moles H2O
the ratio 1:2
x:0.446
x=0.223 moles O2
22. Which of the following elements has the smallest electron affinity? A. carbon C. neon B, oxygen D. flourine
Answer:
carbon
Explanation: carbon is the answer
The triple point of nitrogen occurs at a temperature of 63.1 K and a pressure of 0.127 atm. Its normal boiling point is 77.4 K. (a) What is the vapor pressure of solid nitrogen at 63.1 K
Nitrogen has a normal boiling point of 77.4 K and a melting point (at 1 atm) of 63.2 K. Its critical temperature is 126.2 K, and its critical pressure is 2.55 * 104 torr. It has a triple point at 63.1 K and 94.0 torr.
What is the triple point?The temperature and pressure at which the solid, liquid, and vapour phases of a pure substance can coexist in equilibrium.
- Normal melting point: 63.2 K.
- Normal boiling point: 77.4 K.
- Triple point: 0.127 atm and 63.1 K.
- Critical point: 33.5 atm and 126.0 K.
In such a way:
- N2 does not exist as a liquid at pressures below 0.127 atm: that is because below this point, solid N2 exists only (triple point).
- N2 is a solid at 16.7 atm and 56.5 K: that is because it is above the triple point, below the critical point and below the normal melting point.
- N2 is a liquid at 1.00 atm and 73.9 K: that is because it is above the triple point, below the critical point and below the normal boiling point.
- N2 is a gas at 0.127 atm and 84.0 K: that is because it is above the triple point temperature at the triple point pressure.
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If a neutral sodium atom has one electron removed, what is the result?
Answer: When this atom loses an electron, the result is a positive ion.
Explanation:
Is salinity higher or lower near ice? EXPLAIN!
In the product 6o2, what does the coefficient mean?.
Answer:
It means there are 6 O2 molecules
Explanation:
Write the ionization equation and the ka expression for aqueous formic acid. What is the name of the anion that forms?
Ionization reaction gives the ionization state of the chemical species. Its ionization will result in a conjugate base of the formic acid and release a hydrogen ion.
What is the acid dissociation constant?The acid dissociation constant is the concentration of the acid that has been dissociated into its constituents ions in the solution.
The ionization equation of the formic acid is:
[tex]\rm HCOOH \rightleftharpoons HCOO^{-} + H^{+}[/tex]
The acid dissociation constant (Ka) for formic acid is given as,
[tex]\rm Ka = \rm \dfrac {[H^{+}][HCOO^{-}]}{[HCOOH]}[/tex]
Anions are negatively charged ions and formate ions generated in the dissociation of the formic acid.
Therefore, the formate ion is an anion.
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Match each interaction type to the correct amount of potential energy.
The type of energy which is present between the repulsion interaction is the highest potential energy.
What is potential energy?Potential energy is the amount of energy that is possess by any body with respect to the electric charge posses in that and other factors also.
When molecules have a high attraction force then they have the low potential energy in them.When molecules have a great repulsion between them then they have the great potential energy in them.And molecules have the middle amount of potential energy then they have the balanced interaction.Hence, molecules in which repulsion interaction is present will have highest potential energy.
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How do your eyes, ears, nose, tongue, and skin send information to your brain?
They send signals through the blood.
They send signals through the nerves.
Each sends messages in a different way.
They send molecules through the air.
Answer:
they send signals through the nerves. through sensory receptors to be specific
H2504 has a pH of 1. How many times more acidic is it compared to the chemical
above?
HELPPP
calculate the number of particles of 285 grams of Al2O3
The number of particles of 285 grams of aluminum oxide (Al2O3) is 1.68 x 10²⁴ particles.
Number of moles of the Al2O3The number of moles of the given aluminum oxide is calculated as follows;
Al2O3 = 101.96 g/mol
moles = 285/101.96
moles = 2.795 moles
1 mole = 6.02 x 10²³ particles
2.795 moles = ?
= 2.795 x 6.02 x 10²³ particles
= 1.68 x 10²⁴ particles.
Thus, the number of particles of 285 grams of aluminum oxide (Al2O3) is 1.68 x 10²⁴ particles.
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Concentration required to begin precipitate pbcl2 for pbcl2 ksp=1. 17×10−5
The concentration required to begin to precipitate PbCl2 for PbCl2 is 0.0216 M.
What is molarity?
Molarity is the measure of the concentration of any solute in per unit volume of the solution.
The reaction is [tex]\rm Pb^2^+(aq) + 2Cl^-(aq) \rightarrow PbCl_2(s).[/tex]
The molarity of lead is 0.025 M
The ksp is given 17×10⁻⁵
Now, calculating the concentration
[tex][Pb^2^+] = 0.025 M.\\Ksp = 1.17 \times 10^-^5\\Ksp = [Pb^2^+] \times [Cl^-]^2\\[Cl^-] = \dfrac{\sqrt{ Ksp}}{[Pb^2^+]} \\\\[Cl^-] = \dfrac{\sqrt{ 0.0000117}}{0.025} \\[Cl^-] = 2.16 \times 10^-^2M.[/tex]
Thus, the concentration required to begin to precipitate PbCl2 for PbCl2 is 0.0216 M.
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Determine the oxidation number of chromium (cr) in each of the following compounds. (1) cro2 4 (2) cr2o72− 6 (3) cr2(so4)3 −3
The oxidation number of chromium (Cr) in CrO₂, Cr₂O₇²⁻ and Cr₂(SO₄)₃³⁻ is +4, +6 and +1.5 respectively.
What is oxidation number?Oxidation number of any compound gives idea about the number of exchangeable electrons from the outer most shell of an atom.
CrO₂Let the oxidation state of chromium is x and charge on the whole molecule is zero, so it will be calculated as:
x + 2(-2) = 0
x - 4 = 0
x = +4
Cr₂O₇²⁻Let the oxidation state of chromium is x and charge on the whole molecule is -2, so it will be calculated as:
2x + 7(-2) = -2
2x - 14 = -2
2x = 12
x = +6
Cr₂(SO₄)₃³⁻Let the oxidation state of chromium is x and charge on the whole molecule is -3, so it will be calculated as:
2x + 3(-2) = -3
2x - 6 = -3
2x = 3
x = +1.5 (which is impossible)
Hence oxidation state of chromium atom in CrO₂, Cr₂O₇²⁻ and Cr₂(SO₄)₃³⁻ is +4, +6 and +1.5 respectively.
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I really need help with this problem.
A mixture contains 21.7g NaCl, 3.74g KCl, and 9.76g LiCl.
How many moles of NaCl are in this mixture?
The molar mass is provided in picture attached.
Answer:
.371 mole of NaCl
Explanation:
Na Cl Mole weight = 22.989 + 35.45 = 58.439 g/mole
21.7 g / 58.439 g/mole = .371 mole
NEED THIS ASAP PLEASE HELP
Which of these is an example of a physical change?
A. a banana ripening in the air
B. hydrogen burning in the air
C. zinc reacting with an acid
D. liquid water turning into vapor
Answer:
A
Explanation:
Banana ripening in air is an example of oxidation reaction.
What amino acids do the following sequences code for? uuc
The amino acid coded by the sequence code UUC is phenylalanine.
What are amino acids?An amino acid is an organic compound made up of an amine group and carboxylic group. There are total 20 amino acids are present.
Phenylalanine is coded by two code sequence UUU and UUC. It is not an essential acid, and its role in the body is not confirmed.
Thus, the amino acid coded by the sequence code UUC is phenylalanine.
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Select all that apply. Which of these conditions will cause an increase in the molar concentration of a solution?
A) Increasing the amount of solute
B) Adding water to the aqueous solution
C) Some of the water evaporating from the aqueous solution
D) Stirring the solution
Answer:
A
Explanation:
-Icreaseing the solute would increase the concentration
-increasing the solvent will decrease the concentration
Discussion the sn1 and sn2 substitution reactions. Haloalkanese
The SN₁ substitution reaction, in which the halogen is released from the haloalkane, and the nucleophile attacks the carbon's positive charge. SN₂ in which the nucleophile attacks the halogen's carbon, causing the halogen to be replaced in which nucleophile attack.
What is substitution reaction?
Substitution reactions are those reactions in which one functional group is replaced by another functional group.
Two types of substitution reactions can occur in haloalkanes: SN1 and SN2.
Thus, the SN₁ substitution reaction, in which the halogen is released from the haloalkane, and the nucleophile attacks the carbon's positive charge. SN₂ in which the nucleophile attacks the halogen's carbon, causing the halogen to be replaced in which nucleophile attack.
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Figure 4, Future climate prediction for North America. By 2100, the low-emissions scenario (550 ppm CO2, left) and high-emissions scenario (800 ppm CO2, right) show dramatic precipitation changes. Tan and brown colors show that an area is expected to receive less precipitation, while blue colors show that an area is expected to receive increased precipitation. The image is edited.
According to Figure 4: Climate Projections, how will Las Vegas change by 2100?
options:
You can not tell from this image.
Las Vegas is likely to stay the same.
Las Vegas is expected to receive increased precipitation.
Las Vegas is expected to receive less precipitation.
Answer:
Las Vegas is expected to recieve less precipitation
Which of the following is a synthesis reaction?
AgNO3 + NaCl → AgCl + NaNO3
CH4 + O2 → CO2 + H2O
SO3 + H2O → H2SO4
Cu + AgNO3 → Ag + CuNO3
Synthesis reaction
It is a reaction in which 2 or more reactants combine with each other to form one product .
Check option C
Sulphate and water are combining to form sulfuric acid .
Hence option C is correct
Answer:
SO3 + H2O => H2SO4
Explanation:
I took the test :)
Hi hope you all are doing well
Answer:
yesss
Explanation:
hehhehehhehe
A 5. 00 l container contains ch4, h2, and xe at 35°c with a total pressure of 1. 81 atm. If there are equal moles of each gas, what is the partial pressure of h2?
If there are equal moles of each gas, what is the partial pressure of H₂ is 0.362.
What is partial pressure?The pressure that one of the gases in a mixture would exert if it were in the same volume on its own.
According to the Dalton's law of partial pressure
The Partial pressure of a gas = (Total pressure × mole fraction of the particular gas)
Partial pressure of H₂ is
[tex]\dfrac{1.81}{5.00} = 0.362[/tex]
Thus, the partial pressure of H₂ is 0.362.
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Calculate the pH of a 1.4 x 10-4 M solution of HCI.
Answer:
Here is the solution....hope it helps :)
A gas that has a volume of 22.8 L, a temperature of 42 degrees Celsius (!!), and an
unknown pressure has its volume increased to 37 L and its temperature decreased to
29 degrees Celsius (!!). If I measure the pressure after the change to be 1.69 atm,
what was the original pressure of the gas?
what is the formula of the T method
Answer:
T = (Z x 10) + 50
Explanation:
Calculate the molarity it’s, M, if a solution prepared by dissolving 20 g of NaCl in 1 L of water.
Solve-step-by-step
Answer:
.3422 M
Explanation:
Mole weight of NaCl ( from periodic table) = 58.439 gm/mole
20 g is how many moles ? 20 g / 58.439 gm/mole=.3422 mole
.3422 mole / 1 liter .3422 M
A sample of hydrogen is collected in a flask over water. The partial pressures are 789 mmHg for H₂
and 60 mmHg for H₂O. What is the total pressure exerted by the mixture of gasses?
The total pressure of the gas is calculated as 849 mmHg.
What is partial pressure?The term partial pressure is the pressure that is exerted by an individual gas in a mixture of gases.
In this case, the partial pressures of hydrogen and water are 789 mmHg and 60 mmHg respectively.
Thus, the total pressure of the gas = 60 mmHg + 789 mmHg = 849 mmHg.
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What is the name of rover that was just sent to Mars in March of 2021?
A.Spirit
B.Curiosity
C.Opportunity
D.Perseverance
