Answers
Answer:
• Note that dissolving rate is known as solubility
• Increase in particle size:
Solids → Solubility increaseLiquids → Solubility remains constantGases → Not accounted for• Increase in temperature:
Solids → Solubility decreasesLiquids → Solubility increasesGases → Solubility increases [Graham's law]• Increase in concentration:
Solids → No effect Liquids → Solubility increasesGases → Solubility increases• Increase in agitation [ high water concentration ]:
Solids → No effectLiquids → Solubility decreasesGases → Solubility decreases\(.\)
Related Questions
A football player kicks a 0.94 kg football with a force of 2.4 N. Calculate the acceleration of the football as the player kicks the ball. Round your answer to the nearest tenth of a m/s2. The acceleration of the football is ____ m/s2.
Answers
Answer:
it's 2.6 just did it the other person is wrong.
Its 2.6 the other guy is right
i did the assignment
The National Institute of Science and Technology (NIST) kinetics database lists the rate constant, , of a particular gaseous reaction as 3.93×10−10 cm3⋅molecule−1⋅s−1 at 298 K.
A) Convert the rate constant to units of M−1⋅s−1 .
B) Convert the rate constant to units of Torr−1⋅s−1 .
Answers
Answer:B
Explanation:
.
What volume of SO2, at room temperature and pressure is produced on heating 9.7g
of Zinc Sulphide (ZnS) if reaction takes place as follows
2ZnS()+ 302(g)
→2ZnO(+2SO2(g)
(A) 2.4 dm³
(B) 4.8 dm³
(C) none of these
Answers
Answer:
C. None of these
2 volumes of zinc sulphide produces two volumes of Sulphur dioxide. So, 9.7g of ZnS will produce nothing less than 9.7g of SO2.
If 12.5 grams of strontium hydroxide is reacted with 150 mL of 3.5 M carbonic acid, identify the limiting reactant.
Answers
Answer:
Sr(OH)₂ will be the limiting reagent.
Explanation:
First of all, you should know the following balanced chemical equation:
2 H₂CO₃ + 2 Sr(OH)₂ → 4 H₂O + Sr₂(CO₃)₂
The balanced equation is based on the Law of Conservation of Mass, which says that matter cannot be created or destroyed. Therefore, the number of each type of atom on each side of a chemical equation must be the same.
The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, it is possible to use the reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction). By stoichiometry the following amounts in moles react:
strontium hydroxide: 2 molescarbonic acid: 2 molesNow, you know the following masses of the elements:
Sr: 87.62 g/moleO: 16 g/moleH: 1 g/moleSo the molar mass of strontium hydroxide is:
Sr(OH)₂= 87.62 g/mole + 2*(16 g/mole + 1 g/mole)= 121.62 g/mole
You apply the following rule of three, if 121.62 grams of hydroxide are present in 1 mole, 12.5 grams in how many moles are they?
\(moles of strontium hydroxide=\frac{12.5 grams*1 mole}{121.62 grams}\)
moles of hydroxide= 0.103 moles
On the other hand, you have 150 ml of 3.5 M carbonic acid. Since molarity is the concentration of a solution expressed in the number of moles dissolved per liter of solution, you can apply the following rule of three: if in 1 L there are 3.5 moles of carbonic acid, in 0.150 L (being 1 L = 1000 mL, 0.150 L = 150 mL) how many moles of acid are there?
\(molesofcarbonicacid=\frac{0.150 L*3.5 moles}{1 L}\)
moles of carbonic acid= 0.525 moles
Finally, to calculate the limiting reagent, you can use a simple rule of three as follows: if by stoichiometry 2 mole of strontium hydroxide reacts with , how much moles of carbonic acid will be needed if 0.103 moles of strontium hydroxide react?
\(molesofcarbonicacid=\frac{0.103 moles of strontium hydroxide*2 moles of carbonic acid}{2 moles of strontium hydroxide}\)
moles of carbonic acid= 0.103 moles
But 0.525 moles are available. Since more moles are available than you need to react with 0.103 moles of strontium hydroxide, Sr(OH)₂ will be the limiting reagent.
compare pure substance with mixture
Answers
Answer:
here
Explanation:
a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.
does changes in state of matter indicate a chemical change.
Answers
Answer:
No, changes in matter are physical changes.
Explanation:
The equilibrium constant, Keq, is 4. 4 × 10-4 at 500 K. 2 Upper N Upper O Upper C l (g) double-headed arrow 2 Upper N Upper O (g) Upper C l Subscript 2 Baseline (g) Determine the direction of reaction if 1. 00 M NOCl is combined with 0. 500 M NO and 0. 500 M Cl2 in a sealed flask. No reaction occurs. Reaction proceeds to the right toward the products. Reaction proceeds to the left toward the reactants. Reaction proceeds to the left toward the products.
Answers
The reaction at the given concentration proceed towards left to form reactants. Thus, option C is correct.
The given balanced equation has been:
\(\rm 2\;NOCl\;\leftrightharpoons 2\;NO\;+\;Cl_2\)
The equilibrium constant, Keq for the reaction, is given as:
\(Keq=\rm \dfrac{[NO]^2\;[Cl_2]}{[NOCl]^2}\)
Computation for direction of reactionThe given concentration of NOCl is 1 M
The given concentration of NO is 0. 5 M
The given concentration of Chlorine is 0. 5 M.
The value of equilibrium constant for given concentrations are:
\(Keq=\dfrac{[ 0. 5]^2\;[ 0. 5]}{[1]^2}\\ Keq=0.125\)
The given value of equilibrium constant is \(\rm 4.4\;\times\;10^-^4\). Since the given value of constant is less than the reaction constant, the reaction proceeds towards the reactant to establish equilibrium.
Thus, option C is correct.
Learn more about equilibrium constant, here:
https://brainly.com/question/17960050
1. Scientists measured the spot size of guppies (small fish) in two different populations. Which
population has more guppies with large spots?
a
They both have the same number of guppies with large spots.
b
The population in Brazil has more guppies with large spots.
С
The population in Venezuela has more guppies with large spots.
d
These bar graphs do not show which population has more guppies with large spots.
Answers
Answer: the answer is C
Explanation:
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 21 subjects had a mean wake time of 105.0 min. After treatment, the 21 subjects had a mean wake time of 83.1 min and a standard deviation of 20.7 min. Assume that the 21 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment. min<μ
Answers
The 95% confidence interval estimate for the mean wake time with the drug treatment is between 76.6 min and 89.6 min.
The 95% confidence interval estimate is calculated based on the sample mean and the standard deviation. In this case, the sample mean wake time after treatment is 83.1 min, and the standard deviation is 20.7 min. With these values, we can construct the confidence interval estimate.
The formula for calculating the confidence interval estimate is:
CI = sample mean ± (critical value * standard deviation / square root of sample size)
Using a 95% confidence level, the critical value is 1.96. The sample size in this case is 21.
Plugging in the values:
CI = 83.1 ± (1.96 * 20.7 / √21)
Simplifying the equation:
CI = 83.1 ± 8.08
Therefore, the 95% confidence interval estimate for the mean wake time with the drug treatment is between 76.6 min (83.1 - 8.08) and 89.6 min (83.1 + 8.08).
This result suggests that the mean wake time before the treatment, which was 105.0 min, is outside the confidence interval estimate. The confidence interval estimate does not include the value of 105.0 min, indicating that the mean wake time with the drug treatment is significantly different from the mean wake time before the treatment.
Learn more about confidence interval
brainly.com/question/13067956
#SPJ11
6. Neon has 10 electrons - 2 in the inner shell and 8 in the outer shell. This arrangement of 8 electrons in the
outer shell is extremely stable and makes neon inert, with a valence of zero. Sodium has 11 electrons - 2
in the first shell, 8 in the next shell, and I in the outer shell. Fluorine has 9 electrons - 2 in the first shell
and 7 in the outer shell. How could sodium and fluorine from a compound in which both elements would
be like neon with 8 electrons in the outer shell?
Answers
Let look at EC of Sodium(Na)
\(\\ \sf\longmapsto 1s^22s^22p^63s^1\)
valency= +1Now look at EC of Fluorine
\(\\ \sf\longmapsto 1s^22s^22p^5\)
Valency=-1Now the Compound will be
\(\\ \sf\longmapsto NaF\)
Which term refers to the number of moles of solute per liter of solution?
Question 1 options:
mole fraction
saturation
concentration
molarity
Answers
Answer:
molarity
Explanation:
An insulated cup contains 75. 0g of water at 24. 00oc. A 26. 00g sample of metal at 82. 25oc is added. The final temperature of the water and metal is 28. 34oc. What is the specific heat of the metal?.
Answers
An insulated cup contains 75 g of water at 24 °C. A 26 g sample of metal at 82.25°C is added. The final temperature of the water and metal is 28.34°C. The specific heat of the metal is 0.972 J/ g°C.
Given that :
Mass of the metal = 26 g
The specific heat of the metal = ?
Initial temperature of the metal = 82.25°C
Equilibrium temperature = 28.34°C
Mass of the water = 75 g
Specific heat of water = 4.18 J/ g°C
Initial temperature of the water = 24 °C
The specific heat capacity is given as :
26 × c × ( 82.25 - 28.34) = 75 × 4.18 ( 28.34 - 24)
26 × c × 53.91 = 313.5 × 4.34
c = 0.972 J/ g°C
Thus, the specific heat capacity of metal is 0.972 J/ g°C.
To learn more about specific heat here
https://brainly.com/question/15166473
#SPJ4
Help lol sorry if I’m spamming this is just really hard for me
Answers
The subscript on chemical equations tells you how many atoms the elements have. If there is no subscript then there is only 1 atom.
the general formula for the alkane series is:
Answers
Answer:
The alkanes comprise a series of compounds that are composed of carbon and hydrogen atoms with single covalent bonds. This group of compounds comprises a homologous series with a general molecular formula of C n H 2 n+2 , where equals any integer.
Explanation:
The general formula for the alkane series is CnH2n+2
General formula for the alkane series:In this formula:
"Cn" shows how many carbon atoms are in the alkane molecule.
"H2n+2" shows the amount of hydrogen atoms in the alkane compound, with "n" being the number of carbon atoms.
Alkanes are a group of hydrocarbons that only have single bonds between their carbon atoms. The formula says that each carbon atom is connected to two hydrogen atoms. And the total number of hydrogen atoms in an alkane molecule is two more than double the number of carbon atoms.
Learn more on alkane on https://brainly.com/question/29120960
#SPJ6
True or false: The enzyme concentration at which the reaction velocity is half its maximal value is the KM.
Answers
The statement is false. The enzyme concentration at which the reaction velocity is half its maximal value is not the KM. The KM is the substrate concentration at which the reaction velocity is half its maximal value.
The enzyme concentration does not affect the KM. The KM is a measure of the affinity of an enzyme for its substrate. A low KM indicates that the enzyme has a high affinity for its substrate, and therefore requires a lower concentration of substrate to reach half its maximal velocity. A high KM indicates that the enzyme has a low affinity for its substrate, and therefore requires a higher concentration of substrate to reach half its maximal velocity.
The enzyme concentration, on the other hand, affects the maximal velocity of the reaction. A higher enzyme concentration will result in a higher maximal velocity. This is because a higher enzyme concentration means that there are more enzyme molecules available to catalyze the reaction.
To know more about enzyme concentration, click here:-
https://brainly.com/question/22445180
#SPJ11
while water is boiling, it absorbs 2257 kj of heat per kilogram of water. this takes place at a constant temperature of 100°c. what is the entropy change of 10 kg of water while it boils? (be careful of your energy units). (1 point)
Answers
The entropy change is 6.051 x 10^4 J/K
Given:
mass of water = 10 kg
latent heat of boiling = 2257 kj
constant temperature = 100°c
To Find:
entropy change of 10 kg of water
Solution:
entropy change = mass*latent heat of boiling/temperature
= 10×2257×1000/(273+100) K
= 22,570,000/373K = 6.051 x 10^4 J/K
Hence, entropy change is 6.051 x 10^4 J/K
Learn more about Entropy here:
https://brainly.com/question/6364271
#SPJ4
Organisms typically have more than one form of each gene. If one form can mask the appearance of another form, that form is considered _______ the other form.
A.
better than
B.
dominant over
C.
recessive to
D.
worse than
Answers
If one form of a gene can mask the appearance of another form, that form is considered dominant over the other form. Option B.
What are dominant alleles?According to Mendel, genes are usually made up of 2 alleles. These alleles can be the same or different. When the alleles are the same, the gene is said to be homozygous. If the alleles are different, the gene is said to be heterozygous.
When the two alleles that make up a gene are different, one will be dominant and the other will be recessive. The dominant gene masks the effect of the recessive gene. In other words, the recessive gene cannot be expressed as long as it coexists with the dominant gene. In order for it to be expressed, it has to be in two copies or a homozygous recessive form.
For the dominant allele, however, only one copy is needed for it to be expressed.
In summary, if one form of a gene can mask the appearance of another form, that form is considered dominant over the other form.
More on genes can be found here: https://brainly.com/question/5519888
#SPJ1
amines are multiple choice organic bases that react with water to produce ammonia. organic acids that react with water to produce ammonia. organic bases that react with acids to form ammonium salts. organic acids that react with bases to form ammonium salts.
Answers
Amines are the organic bases that react with acids and form ammonium salts.
Amines are Lewis bases. according to Lewis acid are the electron pair acceptor and bases are the electron pair donor. Amines are that contains a nitrogen atom connected to other groups with the single bond. Amine group has as lone pair of electrons. so. amines can donate the lone pair of electrons to the other molecules. so. amines are the bases or the Lewis bases. Amines are the weak bases. Amines are the derivative of ammonia.
Thus, Amines are the organic bases that react with acids and form ammonium salts.
To learn more about Amines here
https://brainly.com/question/28167507
#SPJ4
In order to become a chemically stable ion, a neutral atom of sodium will _______.
A. lose one electron
B. lose two electrons
C. gain two electrons
D. gain one electron
Answers
Answer:
D. gain one electron
Explanation:
In order to become a chemically stable ion, a neutral atom of sodium will gain one electron. Therefore, the correct option is option D.
What is chemical stability?Chemical stability in chemistry refers to a chemical system's thermodynamic stability. When a system reaches its lowest energy state or in thermodynamic equilibrium with its surroundings, thermodynamic stability occurs.
It could be a spontaneous process when the total number of atoms or molecules in a given shape is conserved despite the fact that individual particles or atoms change forms. In order to become a chemically stable ion, a neutral atom of sodium will gain one electron.
Therefore, the correct option is option D.
To know more about chemical stability, here:
https://brainly.com/question/13107538
#SPJ3
Based on this equation, which of the following statements best describes what would be observed as the reaction takes place?
\(AgNO3(aq) + KCl(aq) ~~---\ \textgreater \ ~~ AgCl(s) + KNO3(aq)\)
a) silver chloride forming a solid precipitate (CORRECT)
b) solid silver dissolving
c) two clear solutions mixing to form one clear solution
d) bubbles forming from aqueous solution production
Answers
Answer:
a
Explanation:
i took the quiz
Which factor would speed up a chemical reaction? (Choose all that apply)
Decreasing particle size
Increasing the temperature
Decreasing the temperature
Increasing particle size
Answers
Answer:
Increasing the temperature
Increasing particle size
Explanation:
Increasing the temperature allows for particles and molecules to move faster (because there is an increase in energy) and allows for more collisions.
∴ Increasing the temperature would be an answer.
Increasing the particle size allows for more surface area and a greater chance for particles to collide with each other.
∴ Increasing particle size would be an answer.
Topic: AP Chemistry
Unit: Kinetics
Which is a renewable energy source?
a. Coal
b. Petroleum
c. natural gas
d. hydroelectric
Answers
Answer:
The answer is D. Hydroelectric
Answer:
natural gas
Explanation:
Write the name for the IONIC compound that contains two aluminum atoms and three sulfur atoms. (Need help ASAP)
Answers
Al +3 charge, Aluminum
S -2 charge, Sulfur
Al2S3
How can you tell one element from another?
Answers
What mass, in grams, of water would form if 4.8 grams of hydrogen reacted with 38.4 grams of oxygen?
Answers
Answer: 4.8 grams of hydrogen is 2.4 moles, and 38.4 grams of oxygen is 1.2 moles. This is exactly the Stoichiometry ratio of the reaction, therefore the two will both completely react giving rise to the same total mass of water.
what happened if you poured lava on snow
Answers
Answer:
This is what could happen:
Explanation:
When lava meets ice, the resulting mess can cause flooding, destroy valuable resources and even produce explosions.
Answer: When lava meets ice, it neither explodes nor tunnels through; rather, it forms strange-looking bubbles.
Explanation:
PLEASE HELPPPP I WILL GIVE BRAINLIST
Answers
The possible values of the quantum numbers are:
Orbital shape quantum number l: 0, 1, 2, 3, 4, or 5.
Magnetic quantum number m: -l to +l.
Spin quantum number, s: +1/2 or -1/2.
What are the azimuthal, magnetic, and spin quantum numbers of the valence electrons in an atom with principal quantum number, n = 6?For the principal quantum number n = 6, the possible values of the azimuthal (orbital shape) quantum number l are 0, 1, 2, 3, 4, and 5.
The magnetic quantum number m can have values ranging from -l to +l, inclusive.
The spin quantum number, s can be either +1/2 or -1/2.
So, the valence electrons in an atom with principal quantum number n = 6 can have the following quantum numbers:
Azimuthal quantum number, l can be 0, 1, 2, 3, 4, or 5.
Magnetic quantum number, m can range from -l to +l, inclusive.
Spin quantum number, s can be either +1/2 or -1/2.
Learn more about quantum numbers at: https://brainly.com/question/2292596
#SPJ1
In the following equilibrium, when sodium ion is removed, the concentration of chloride ion will Na+ (aq) + Cl- (aq) ↔ NaCl (s)
Answers
The given equation, Na+ (aq) + Cl− (aq) ↔ NaCl (s), is a reversible reaction that can occur in both the forward and reverse directions. When the sodium ion is removed, the concentration of chloride ion will shift in order to maintain the equilibrium, and the equilibrium constant will not change.
The given equation, Na+ (aq) + Cl− (aq) ↔ NaCl (s), is a reversible reaction that can occur in both the forward and reverse directions. When the sodium ion is removed, the concentration of chloride ion will shift in order to maintain the equilibrium, and the equilibrium constant will not change.
At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction, and the concentrations of the reactants and products remain constant. Therefore, if the concentration of one of the ions is changed, the reaction will shift in the direction that minimizes the change.
For example, if the concentration of Na+ is decreased, the reaction will shift in the forward direction to increase the concentration of Na+. This is done in order to reestablish the equilibrium. Conversely, if the concentration of Cl− is decreased, the reaction will shift in the reverse direction to increase the concentration of Cl−.
In general, the equilibrium constant for a reaction expresses the ratio of the concentrations of the products to the concentrations of the reactants at equilibrium. It does not depend on the initial concentrations or the conditions of the reaction, but only on the temperature.
To know more about reversible reaction visit:
https://brainly.com/question/31950205
#SPJ11
I need help please! I will mark brainliest
Kate's father gave her a set of plastic building blocks as a gift. She spent many days arranging the blocks into various shapes. One day at Kate's school, the teacher asked the class to build a robot using the same plastic building blocks. Kate was the first student to finish building the robot. How was Kate able to complete her robot so quickly?
A. Kate learned how to use blocks in less time than the other students, which allowed her to build a robot quickly.
B. Kate has known how to build robots out of blocks since birth, which allowed her build one quickly.
C. Kate's brain stored her past experiences with the blocks as memories, which allowed her to build a robot quickly.
D. Kate's hands stored her past experiences with the blocks as memories, which allowed her to build a robot quickly.
Answers
Answer:
I think it is A I am not so sure about it
Explanation:
From the following compounds, identify the ones that are nonpolar covalent.
H2O
NCl3
AuCl3
ClO2
SF4
SO3
Answers
Answer:
The nonpolar covalent compounds are:
H2O (polar covalent)
NCl3 (polar covalent)
AuCl3 (ionic)
ClO2 (polar covalent)
SF4 (polar covalent)
SO3 (nonpolar covalent)