2. The rate constant of a first order reaction is 66 s-1. What is the rate constant in units of minutes
Answer:
3960/min
Explanation:
The rate constant is expressed in seconds (s): 66 s⁻¹ = 66/s
We know that: 1 min = 60 s
Conversion factor = 60 s/1 min
We multiply the rate constant by the conversion factor to obtain the rate constant expressed in units of minutes:
rate constant = 66/s x 60 s/1 min = 3960/min
The rate constant of a first order reaction in units of minutes is equal to 3960 / min.
What is rate constant?Rate constant of any chemical reaction given knowledge about the speed and the direction of the reaction.
In the question, given that
Rate constant of a first order reaction = 66 per sec.
We know that in 1 min = 60 seconds are present.
So, we multiply the given value by 60/1 sec/min to convert into minutes units.
Rate constant of a first order reaction = 66 per sec × 60/1 sec per min = 3960 per min.
Hence, 3960 per min is the rate constant in units of minutes.
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Explain how mile-a-minute vine could have a long-term effect on local ecosystems. Use evidence and scientific information about genetic traits, adaptation and factors in the environment to support your response.
A mile-A-minute vine would kill off a good number of native plants by out growing them , having bigger and stronger roots that absorb more nutrients and water. They also will grow faster and be able to get more sunlight
atomic number of element is 15 write a formula of an oxide
Answer:
Atomic Number. 15=phosphorus
Valency=3
So, Oxide=P203
he unknown solution is prepared by mixing CaCO3(s) and HCl(aq). The H2CO3 produced in this reaction decomposes to CO2 (g) and H2O. Write the complete chemical equation for this reaction, indicating the state of each species. If ionic compounds dissociate, separate the ions in the equation.
Answer:
CaCO₃(s) + 2 H⁺(aq) + 2 Cl⁻(aq) ⇒ Ca²⁺(aq) + 2 Cl⁻(aq) + H₂O(l) + CO₂(g)
Explanation:
Let's consider the molecular equation that occurs when CaCO₃(s) reacts with HCl(aq).
CaCO₃(s) + 2 HCl(aq) ⇒ CaCl₂(aq) + H₂O(l) + CO₂(g)
The complete ionic equation includes all the ions and the compounds that do not dissociate in water.
CaCO₃(s) + 2 H⁺(aq) + 2 Cl⁻(aq) ⇒ Ca²⁺(aq) + 2 Cl⁻(aq) + H₂O(l) + CO₂(g)
What is the scientific basis for the application of surimi production (gel formation)?
Name:
Date:
Lab 2:
Density and Specific Heat
Pre-lab questions:
1. Density of aluminum is 2.702 g/cm². Calculate the mass of a rectangular aluminum solid with a length
of 7.45 cm, a width of 4.78 cm, and a height of 5.25 cm.
2. When measuring mass and volume of a liquid or gas to determine density, temperature must be
measured. Why does it depend on the temperature?
Answer:
1. 505g is the mass of the aluminium.
2. The answer is in the explanation
Explanation:
1. To solve this question we need to find the volume of the rectangle. With the volume and density we can find the mass of the solid:
Volume = 7.45cm*4.78cm*5.25cm
Volume = 187cm³
Mass:
187cm³ * (2.702g/cm³) = 505g is the mass of the aluminium
2. When the temperature of a liquid increases, the volume increases doing the density decreases because density is inversely proportional to volume. And works in the same way for gases because the temperature produce more collisions and the increasing in volume.
Why is the reaction SO2 + H2O → H2SO2 not balanced?
There are more oxygen atoms in the reactants while there are less oxygen atoms in the product.
Both sides of the equation is supposed to be balanced for a balanced equation. If any one of them isn't balanced, the equation remains unbalanced.
The main reason why the reaction above can not be balanced is:
This chemical reaction SO2 + H2O -> H2SO2 is not correctly written.
It must be: SO2 + H2O -> H2SO3
hope this helps....
Group the elements into pairs that would most likely exhibit similar chemical properties. It does not matter which pair of elements is pair 1, pair 2, or pair 3, so long as the correct elements are paired.Pair 1 Pair 2 Pair 3 Answer Bank Mg St Kr Ne+
As P
Answer: Pair 1 has Mg and Sr, Pair 2 has Kr and Ne, Pair 3 has As and P.
Explanation:
A periodic table is a group of elements presented in a tabular form where elements are arranged in a series of 7 rows and 18 columns.
The vertical columns are known as groups and horizontal rows are known as periods.
The elements having similar chemical properties are arranged in one group.
Magnesium (Mg) is the 12th element of periodic table placed at Group 2 and Period 3
Strontium (Sr) is the 38th element of periodic table placed at Group 2 and Period 5
Krypton (Kr) is the 36th element of periodic table placed at Group 18 and Period 4
Neon (Ne) is the 10th element of periodic table placed at Group 18 and Period 2
Arsenic (As) is the 33rd element of periodic table placed at Group 15 and Period 4
Phosphorus (P) is the 15th element of periodic table placed at Group 15 and Period 3
As magnesium and strontium are present in the same group, they will have similar chemical properties. Similarly, krypton and neon will form the second pair. Likewise, arsenic and phosphorus will form a pair.
Hence, Pair 1 has Mg and Sr, Pair 2 has Kr and Ne, Pair 3 has As and P.
what is the chemical fomula for water
Answer:
H2O.....................
What kind of magma produce the most violent eruptions
Answer:
Explosive eruptions from Composite or strato volcano
Explanation:
since they have multiple holes of exit, they can get pretty explosive.
Which of the following is NOT true about soil? *
why ethene is more reactive than ethane
Answer: In ethyne due to the presence of a triple bond, the electron density is very high so it is more reactive than ethane.
Explanation:
Please help meeee?!!!!
Explanation:
A structure in which valence electrons are depicted by dots is called a lewis structure.
For example, atomic number of oxygen is 8 and its electronic distribution is 2, 6.
Hence, the electron dot structure for [tex]O_{3}[/tex] molecule is as depicted in the picture attached.
Pressurized metal gas cylinders are generally used to store commonly used gases in the laboratory. At times, it can be easier to chemically prepare occasionally used gases. For example, oxygen gas can be prepared by heating KMnO4(s) according to the following chemical reaction:
2KMnO4(s) → K2MnO4(s) + MnO2(s) + O2(g)
How many grams of KMnO4 would you need to produce 0.27 moles of O2, assuming 100% conversion?
Answer:
You need 85.32 grams of KMnO₄ to produce 0.27 moles of O2, assuming 100% conversion.
Explanation:
The balanced chemical reaction is:
2 KMnO₄ (s) → K₂MnO₄ (s) + MnO₂ (s) + O₂ (g)
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles participate in the reaction:
KMnO₄: 2 molesK₂MnO₄: 1 moleMnO₂: 1 moleO₂: 1 moleThen you can apply the following rule of three: if by stoichiometry 1 mole of O₂ is produced by 2 moles of KMnO₄, 0.27 moles of O₂ are produced by how many moles of KMnO₄?
[tex]moles of KMnO_{4} =\frac{0.27 moles of O_{2} *2moles of KMnO_{4} }{1mole of O_{2} }[/tex]
moles of KMnO₄= 0.54
The molar mass of KMnO₄ is 158 [tex]\frac{g}{mol}[/tex].
Then the amount of mass present in 0.54 moles of the compound can be calculated by:
0.54 moles* 158.034 [tex]\frac{g}{mol}[/tex]= 85.32 grams
You need 85.32 grams of KMnO₄ to produce 0.27 moles of O2, assuming 100% conversion.
En una práctica experimental, para la obtención de cloruro cobaltoso, se hacen reaccionar 120 g de sulfuro cobaltoso de 60% de pureza con 30 cm3 de ácido nítrico concentrado (densidad 1,142 g/cm3, 69,8% en peso de HNO3), en presencia de ácido clorhídrico concentrado (densidad 1,19 g/cm3, 37,33 % en peso de HCl). Calcular:
a) El volumen de ácido clorhídrico concentrado que se requiere para la reacción.
b) La cantidad máxima de cloruro de cobalto (II) que se puede preparar.
c) El número de moléculas de monóxido de nitrógeno que se deprenden.
d) El número de átomos de azufre que se forman.
e) El número de moles de agua que se obtiene.
CoS + HNO3 + HCl → CoCl2 + NO + S + H2O
Answer: D
Explanation:
Utilicé traductor de español para responder esta pregunta
When a 1.00 L sample of water from the surface of the Dead Sea (which is more than 400 meters below sea level and much saltier than ordinary seawater) is evaporated, 181 grams of MgCl2 are recovered. What is the molarity of MgCl2 in the original sample?
Answer:
1.90 M
Explanation:
Step 1: Given data
Mass of MgCl₂ (solute): 181 gVolume of the solution: 1.00 LStep 2: Calculate the moles corresponding to 181 g of MgCl₂
The molar mass of MgCl₂ is 95.21 g/mol.
181 g × 1 mol/95.21 g = 1.90 mol
Step 3: Calculate the molarity of the solution
Molarity is equal to the moles of solute divided by the liters of solution.
M = 1.90 mol/1.00 L = 1.90 M
Rita determined the experimental van 't Hoff factor, i, for KCl to be 1.9 which is less than the theoretical value of 2. Select the option that best explains the difference between the theoretical and experimental i.a) The difference is due to the ion-pairing effect which effectively reduces the number of solute particles present in the solution.b) The difference is due to the ion-pairing effect which effectively increases the number of solute particles present in the solution correct amount of KCl that will give better agreement between the experimental and theoretical results.c) Rita did not freeze the entire sample.
Answer:
The difference is due to the ion-pairing effect which effectively reduces the number of solute particles present in the solution.
Explanation:
Colligative properties are those properties that depend on the amount of solute present. Such properties include; boiling point elevation, freezing point depression etc.
Ion pairing causes the Van't Hoff factor to deviate from whole numbers. Ion pairing effect generally reduces the number of solute particles in solution thereby decreasing the experimental value of the Van't Hoff factor (i).
Hence, the reason why Rita determined the Van't Hoff factor as 1.9 and not the theoretical value of 2 is because of on-pairing effect which effectively reduces the number of solute particles present in the solution.
The difference between the theoretical and experimental is A. The difference is due to the ion-pairing effect which effectively reduces the number of solute particles present in the solution.
Colligative propertiesIt should be noted that colligative properties simply means the properties that depend on the amount of solute present.
The ion pairing causes the Van't Hoff factor to deviate from whole numbers. Therefore, they caused the difference between the theoretical and experimental values.
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In centigrade bromine has a melting point of -7 and a boiling point of 58. Room temperature is 20. What is bromine at this temperature? Answers- Solid Liquid Gas
Solid with some liquid. It has to be one of those/
Answer:
Bromine will be a liquid
I need help with this
In general, when hydrocarbons like oil are added to water, the two liquids_______ because hydrocarbons are______ and water is_______
Answer:
do not mix, non-polar, polar
Explanation:
In general, when hydrocarbons like oil are added to water, the two liquids do not mix because hydrocarbons are non-polar and water is polar.
As a general rule of solubility, we say "like dissolves like", meaning polar compounds are soluble in polar solvents and non-polar compounds are soluble in non-polar solvents
This is due to the intermolecular forces, which are dispersion forces for non-polar compounds and dipole-dipole interactions for polar compounds.
PLZZZ HELPPPPPPPPPPPPPPPPPPPPP
Answer:
1 +-0.05cm
Explanation:
because this is more suitable
Define solubility. a solid that does not dissolve in a gas the amount of a substance that will dissolve in a given amount of solvent the amount of a substance that will dissolve in a given amount of solute a liquid that does not dissolve in another liquid a solid mixed with another solid
Answer:
the amount of a substance that will dissolve in a given amount of solvent.
Explanation:
Solubility is a term used to describe how readily a substance can be dissolved in a solvent to form a solution. Thus, a substance is said to be soluble if it dissolves completely in a solvent and insoluble if it doesn't dissolve or only dissolves partially.
For example, sodium chloride (NaCl) when mixed with water dissociates into sodium and chloride ions. Thus, salt (sodium chloride) is said to be soluble because it dissolves completely in water.
Furthermore, a compound that dissolves completely in water to produce an aqueous solution is said to be soluble in water.
In conclusion, solubility is simply the amount of a substance such as salt, that will dissolve in a given amount of solvent. A solvent is any liquid such as water, coffee, tea, etc., that dissolves a liquid, gaseous, or solid solute to produce a solution.
HELP ME PLZ AND THANKS I WILL MARK YOU AS BRAINLIEST!!!
Answer:
See explanation.
Explanation:
Hello there!
In this case, since this problem is about gas laws, more specifically about the Gay-Lussac's one since the volume is said to be constant, we can use the following equation for its solution for the final pressure, P2:
[tex]\frac{P_2}{T_2} = \frac{P_1}{T_1}[/tex]
[tex]P_2= \frac{P_1T_2}{T_1}\\\\P_2 =\frac{12.0atm*450K}{300K}\\\\P_2= 18.0atm[/tex]
Thus, we fill in the table as follows:
Initial Final
Pressure 12.0 atm 18.0 atm
Volume 4.0 L 4.0 L
Temperature 300K 450K
Regards!
The value of keq for the following reaction is 0.25
SO2(g) + NO2(g) _ SO3(g) + NO(g)
What is the value of at the same temperature if we multiply the reaction by 2
What is the oxidation (charge) number of tin in Sno?
Ο Α. -2
OB. +4
O C. +2
O D. 4
Explanation:
+2
hope it helps................
I need information about
"forming colloid"
THANK YOU!
Answer:
Condensation methods from colloidal particles by aggregation of molecules or ions. Examples of colloids are really in common in evryday life, eg. Mayonnaise, butter, milk, gelatin, paper etc..
Every colloid consists of two parts :colloidal particles and the dispersing medium.
1. As you go across a period, what is a useful comparison point?
A.
oxides
B.
halides
C.
hydrides
D.
hydroxides
-----
2. Most elements are
A.
allotropes
B.
nonmetals
C.
metalloids
D.
metals
----
3. A metalloid is a(n) __ conductor of heat and electricity than a metal.
A.
better
B.
worse
C.
equal
D.
cannot be determined
-----
4. What causes the formation of allotropes?
A.
pressure
B.
light
C.
temperature
D.
all of the above
----
As you move __and __ elements become more metallic.
A.
left, down
B.
right, down
C.
right, up
D.
left, up
------
5. All of the following metalloids form allotropes except
A.
B
B.
Si
C.
Te
D.
Po
------
6. What is a chemical property of a metal?
A.
malleable
B.
ductile
C.
positive oxidation states
D.
conducts heat and electricity
----
Explanation:
1. As you go across a period, what is a useful comparison point?
A.
oxides
2. Most elements are
A.
allotropes
3. A metalloid is a(n) __ conductor of heat and electricity than a metal.
A.
better
4. What causes the formation of allotropes?
A.
pressure
As you move __and __ elements become more metallic.
A.
left, down
5. All of the following metalloids form allotropes except
A.
B
6. What is a chemical property of a metal?
A.
malleable
Small amounts of Liquid A and Liquid B are sprayed into the air, where they form perfect spheres with a volume of 45.0μL. The diameters of these drops are measured with a high-speed camera, and their surface areas SA and SB calculated.
a. SA will be greater than SB
b. SA will be less than SB
c. SA will be equal to SB
d. It's impossible to predict whether SA or SB will be greater without more information.
d. It's impossible to predict whether SA or SB will be greater without more information.
What is surface area?The surface area of an object is the sum of the areas of all its surfaces. It is typically measured in square units, such as square inches or square centimeters. The formula for the surface area of an object depends on its shape.
The surface area of a sphere is given by the formula 4πr^2, where r is the radius of the sphere. Since the volume of the spheres formed by Liquid A and Liquid B is the same (45.0 μL), their radii will also be the same. Therefore, the surface area of the spheres formed by Liquid A and Liquid B will also be the same.
However, it's important to note that this assumes that the two liquids have the same density and viscosity. If the densities or viscosities of the liquids are different, that could affect the size and shape of the drops, and thus the surface area.
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It's impossible to predict whether SA or SB will be greater without more information. The correct answer is: d.
The surface area of a sphere is given by the formula [tex]4\pi r^2[/tex], where r is the radius of the sphere. Given that the volume of the drops is the same, their radii will be different depending on the density of the liquids. The density of Liquid A and Liquid B will determine their respective masses for a fixed volume, which in turn will affect their radii when forming spheres.
If the densities of Liquid A and B are significantly different, the sphere with the higher density liquid will have a smaller radius and thus a smaller surface area, while the sphere with the lower density liquid will have a larger radius and a larger surface area. Conversely, if the densities are similar, the radii and surface areas may also be similar. Therefore, without more information about the densities of the liquids, we cannot accurately predict whether SA or SB will be greater. Hence The correct answer is: d.
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If the Air Pressure on a mountain Is 0.3 atm what is this value mmHg? 1atm = 760mmHg = 101kPa
Answer:
IS IT MULTIPLE CHOICE
Explanation:
2 . a) b) (1) List three oxides of nitrogen ( 3ks) State Charles law (2mks) (111) A given mass of gas occupies 300cm at 900mmHg if temperature remains constant (5mks) State one industrial application in each of the following Crystallization (2mks) (11) Filtration (2mks) (111) Fractional distillation (2mks) (1) State the property of hydrogen which makes it suitable for filling meteorological balloons (2mks) Why is helium preferred to hydrogen in filling balloons? (2mks) (1) с) 3. a) b) (1) List the steps involved in the purification of water for town supply State two differences between rusting and burning (1) Copy and complete the following table Element No of neutron Electron Group configuration 1 1522522p5 ZOR (ii) State the family to which the elements belong State the two differences between fine chemical and heavy chemicals 32P 130 19 c) 1. a ( List the three types of particles present in an atom Name the element that does not contain all the three particles What is the particle that is not present What is isomerism? b)
ask correctly so that your points cant make fun of others