Answer:
liquid.
Explanation:
At room temperature, a liquid is, well a liquid, but if you heat it up, it will evaporate into a vapor.
Which of the following inter-particle forces has the lowest potential energy?
A. ion-ion interaction
b. hydrogen bonding
c. dipole-dipole interaction
d. ion-dipole moment
Answer:
b. hydrogen bonding.
Explanation:
Hope it helps.
Why does a hot water bottle feel warm? Options: Molecules in the hot water bottle are moving faster than molecules in the skin. Molecules in the skin are moving faster than molecules in the hot water bottle.
Answer:
the answer is none of the above the answer is that if w should pour the hot water in a bottle the heat will make molecules combine together that is what brought about heat
Answer:
Molecules in the hot water bottle are moving faster than the molecules of the skin.
Explanation:
When an object is heated, the molecules of that object move much faster than the room temperature object or a cold object. When the molecules move faster, the friction causes heat.
What is K for (CH3)2N(aq) + H20() = (CH3)2NH(aq) + OH(aq)?
A. [(CH 3N][(CH NH*]
В. к.
[(CH3)3N]
[(CH3)2NH* [OH-]
C. Ko
[(CH, NH* ||CH"]
[(CHz),N]
D. K
[(CH, NH*]
[(CH2),N]
Answer: [tex]K=\frac{[OH^-]\times [(CH_3)2NH]}{[(CH_3)_2N]}[/tex]
Explanation:
Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as [tex]K[/tex]
For the given chemical reaction:
[tex](CH_3)_2N(aq)+H_2O(l)\rightarrow (CH_3)2NH(aq)+OH^-(aq)[/tex]
The concentration of pure solids and pure liquids is taken as 1.
Thus [tex]K=\frac{[OH^-]\times [(CH_3)2NH]}{[(CH_3)_2N]}[/tex]
What is the change in enthalpy of the first reaction below, given the enthalpies
of the other two reactions?
2NO(g) + O2(g) + 2NO2(g)
N,(8)+ O2(g) → NO(g)
N,(8)+O2(g) + NO2(g)
AH = 90 kJ/mol
AH° = 34 kJ/mol
A. 56 kJ
B. -112 kJ
C. 124 kJ
D. -248 kJ
Answer:
The correct option is;
B. -112 kJ
Explanation:
The parameters given are;
N (g) + O₂ (g) → NO (g) ΔH = 90 kJ/mol
N (g) + O₂ (g) → NO₂ (g) ΔH = 34 kJ/mol
The required chemical reaction is given as follows;
2NO (g) + O₂ (g) → 2NO₂ (g)
Therefore, the heat of formation of 2 moles of NO = 2 × 90 = 180 kJ
The heat of formation of 2 moles of NO₂ = 2 × 34 = 68 kJ
Hence, given that the heat of formation of O₂ at room temperature = 0 kJ/mol, we have;
Change in enthalpy of the chemical reaction = Heat of formation of the products - Heat of formation of the reactants
Change in enthalpy of the chemical reaction = 68 kJ - 180 kJ = -112 kJ
Change in enthalpy of the chemical reaction = -112 kJ.
Answer:
-112
Explanation:
got it right on test
How many grams of potassium chloride (KCl) can be dissolved in 68.0g of water at 40°C? Please help.
Answer:
The problem provides you with the solubility of potassium chloride,
KCl
, in water at
20
∘
C
, which is said to be equal to
34 g / 100 g H
2
O
.
This means that at
20
∘
C
, a saturated solution of potassium chloride will contain
34 g
of dissolved salt for every
100 g
of water.
As you know, a saturated solution is a solution that holds the maximum amount of dissolved salt. Adding more solid to a saturated solution will cause the solid to remain undissolved.
In your case, you can create a saturated solution of potassium chloride by dissolving
34 g
of salt in
100 g
of water at
20
∘
C
.
Now, your goal here is to figure out how much potassium chloride can be dissolved in
300 g
of water at this temperature. To do that, use the given solubility as a conversion factor to take you from grams of salt to grams of water
300
g H
2
O
⋅
34 g KCl
100
g H
2
O
=
102 g KCl
You should round this off to one sig fig, since that is how many sig figs you have for the mass of water
∣
∣
∣
∣
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
a
a
mass of KCl
=
100 g
a
a
∣
∣
−−−−−−−−−−−−−−−−−−−−−−−
Explanation:
Based on the solubility curve, 27.2 g of KCl will dissolve in 68.0 g of water.
What is a solubility curve?A solubility curve is a curve which plots the amount of solute that can dissolve in a given volume of solvent against changes in temperature.
The solubility of a gives the amount that of solute that can dissolve in a given volume of solvent at a given temperature.
Based on the solubility curve above, 40 grams of potassium chloride (KCl) can be dissolved in 100.0g of water at 40°C.
Solubility of KCl at 40 °C = 0.4 g/g of water
Mass of KCl that can dissolve in 68.0 g of water = 0.4 × 68 = 27.2 g
Therefore, 27.2 g of KCl will dissolve in 68.0 g of water.
Learn more about solubility curve at: https://brainly.com/question/14366471
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What kind of energy is thermal energy?
A. Potential energy
B. Kinetic energy
C. Chemical energy
D. Atomic energy
Answer:
B. Kinetic energyExplanation:
According to research :
Thermal energy comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature. Heat energy is another name for thermal energy. Kinetic energy is the energy of a moving object. As thermal energy comes from moving particles, it is a form of kinetic energy.
Use the chemical equation to find the answers. BaSO4 + H2SO4 → Ba(HSO4)2 Identify how many oxygen atoms are in the product. Identify how many oxygen atoms are in the reactant.
Answer:
Since the equation is balanced, So it have same number of oxygen in the reactants and well as product.
Oxygen in product = 8
Oxygen in reactant = 8
Answer:
Explanation:
i got prove thoooooo
Why does reducing solute particle size increase the speed at which the solute dissolves in water? A. It exposes more of the solute to the water molecules. B. It makes the temperature of the water significantly higher. C. It raises the pressure of the water molecules on the solute. D. It makes the water molecules move around faster.
Answer:A
Explanation:For a given amount of solute, smaller particles have greater surface area. With greater surface area, there can be more contact between particles of solute and solvent.
Answer:
A. It exposes more of the solute to the water molecules.
Explanation:
What distinguishes a substance from a mixture? Mixtures can be separated physically, while compounds cannot. Samples of the same substance can have different intensive properties. Substances are compounds, and mixtures are not. Mixtures are groupings of elements, and compounds are not.
Answer Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.
Which describes order of the energy transformations that occur in a hydroelectric power plant? The kinetic energy of water is transformed into electrical energy at the turbines. This electrical energy is used by the generator to create mechanical energy. The mechanical energy of water is transformed into potential energy at the turbines. This potential energy is used by the generator to create electrical energy. The kinetic energy of water is transformed into mechanical energy at the turbines. This mechanical energy is used by the generator to create potential energy. The kinetic energy of water is transformed into mechanical energy at the turbines. This mechanical energy is used by the generator to create electrical energy. URGENT!!
Answer:
This mechanical energy is used by the generator to create electrical energy
Explanation:
Answer:
The kinetic energy of water is transformed into electrical energy at the turbines.
Explanation:
How many moles of AlF3 are present if a scientist isolates 1.28 x 10^27 molecules of AlF3? Show your work in the space below
4.00 moles
2,126 moles
0.00341 moles
2.00 moles
Answer:
The answer is 2,126 moles
To find the number of moles we use the formula;
N = n × L
where
N is the number of entities
n is the number of moles
L is the Avogadro's constant which is
6.023 × 10^23
n = N / L
N = 1.28 x 10^27 molecules
n = 1.28 x 10^27 / 6.023 × 10^23
n =2126.245
n = 2,126moles
Hope this helps
How do the processes of respiration, Combustion, and photosynthesis determine the percentage of carbon dioxide in the atmosphere? a. Photosynthesis…… b. Combustion……
Answer:
A photosynthesis is the sir or ma'am
What type of bonding around a central atom would result in a trigonal planar
molecule?
Answer: Three groups bound to it with no lone pairs
i think...
a sample of 30 11th graders were asked to select a favorite pattern out of 6 choices. The following display shows what their favorite color patterns where. The counts have been recorded in the accompanying table according to pattern and the number of students who selected that pattern. What is the missing value in the table? A.11 B.9 C.8 D.10
Answer:
B.9
Explanation:
Students: 30
Total counts: 21 + ?
3+6+6+4+2 = 21
30-21 = 9
The missing value in the table is 9
what are the 4 driving forces of chemical reactions
Answer:
I only know of two.
Source :the web
Enthalpy, H , the heat flow at constant pressure for a given process. Entropy, S , the amount of energy dispersal for a given process
Explanation:
In chemistry, driving force of a chemical reaction or "force of reaction" is the "chemical affinity" or affinity A, which is measured by negative change in the free energy (Gibbs free energy -ΔG or Helmholtz free energy -ΔH) on going from the reactants to the products
What is the viscosity and flammability of refinery gas?
1. Convert 0.00006125 to scientific notation
Answer:
6.125 × 10^-5
Explanation:
You have to move the decimal place 5 times to the right. Remember in scientific notation the first number, (the number that comes before the 10) has to be between 1.0 and 9.99...
Which of the following sources is considered to be most reliable for scientific
information?
A. Legislation regarding environmental issues
B. Article in an academic journal
C. Interpretation of a journal article
D. Political commentary on research
Answer:
The answer is D
Explanation:
Pls mark as brainliest
Once an action plan is in place, it should not be changed.
Please select the best answer from the choices provided.
ОТ
OF
Answer:
F = False
Explanation:
An action plan is a plan that an individual or a firm creates, that contains their objectives, aims, strategies , which they require to achieve their specific goals.
An action plan is very detailed, streamlined and straight to the point. It contains a series or a number of steps or tasks that an individual must embark on in other to achieve their end goal.
WHEN AN ACTION PLAN AS BEEN PUT IN PLACE OR SET IN MOTION, IT CAN BE CHANGED OR ALTERED. This is because the aim of a action plan is to achieve the end goal of an individual or a firm. As long as the changes made in the action plan does not hinder the achievement of those goals then the action plan can be changed.
Some of the very common reasons why action plans are changed or modified includes:
a) To make the action plan more flexible.
b) To track and monitor your progress in achieving your end goal. If there is a delay, you can easily track it out on your action plan and modify it.
In other to create an action plan, it is very important that the goals of such that individual or firm is very well defined and clear from the beginning. Action plans must always be monitored, and updated regularly.
Answer:
F, false
Explanation:
i took the quiz on edge
Calculate the molar mass of carbon tetrafluoride (CF4) in grams per mole, rounding to proper significant figures, if mc= 12.01 u and mF = 19.00 u.
Answer:
molar mass of carbon tetrafluoride (CF4) is
(12.01 × 1 ) + ( 4 × 19.00)
= 12.01 + 76
= 88.01u
= 88u
Hope this helps
Energy comes in different forms.
Answer:
liquid, solid, and gas
Explanation: It depends where the molecules are moving. When a solid the molecules are vibrating and are all together, compact, the molecules are also very slow. When a liquid the molecules are moving back and forth, up and down, and are less compact, but moving faster. When a gas, the molecules move everywhere very quickly, moving super fast.
The definition of a limiting reactant can be summarized as:
a the reactant that is used up
b the greater amount produced
c the reactant that is not fully used
d the smaller amount produced
Answer:
Explanation:
A limiting reactant in a chemical reaction is one which puts limits on amount of product produced out of the reaction. The process of chemical reaction is stopped when the limiting reactant is fully used up.
Example:
Suppose you have
5 gram of oxygen and 10 gram of hydrogen to make any chemical product say y
since
amount of oxygen is only 5 gram thus, when all of 5 gram of oxygen will be used up then no further reaction will take place even though amount of hydrogen is present to react.
Thus, we can say that
oxygen is limiting the production of product y.
oxygen is fully used until the reaction stops.
Thus, in this case oxygen is limiting reactant.
Based on above discussion
the correct option for this problem is
a the reactant that is used up
Which layer of the sun is responsible for producing the light shown in the picture above?
Chromosphere
Convective Zone
Photosphere
Radiative Zone
Answer:
The photosphere
Explanation:
The photosphere comes from the outermost layer of the sun
Pls give me brainliest
Answer:
nice i think he right
Explanation:
Under what conditions will a gas be least likely to exhibit the ideal gas properties predicted by the ideal gas law?
Answer:
High pressure and low temperature, because particles are forced close together and moving slower, so intermolceular forces of attraction increase.
Explanation:
The properties of an ideal gas are explained by the kinetic-molecular theory. An ideal gas assumes there is no intermolecular attraction between the molecules. High pressure would make the particles closer together and interact more, going against the kinetic molecular theory that states there are large spaces between particles and no interactions between particles. Low temperature would make the particles slow which prevents them from overcoming the intermolecular attraction between particles.
The empirical formula is:
A. the actual number of atoms of each element in a molecule.
B. representation of a compound that shows how its atoms are arranged.
C. All of these
D. the relative number of atoms of each element, using the lowest whole ratio.
Reset Selection
Answer:
option c the relative number of atoms of each element using the lowest ratio because empirical formula gives the simplest-whole number ration of each element
e.g. the empirical formula of benzeneC6H6 in CH
Explanation:
I HOPE IT WILL HELP YOU
What volume of air at 25°C and 1.00 atm can he stored in a 10.0 L high-pressure air tank if compressed to 25°C and 175 atm?
Answer:
1750L
Explanation:
Given
Initial Temperature = 25°C
Initial Pressure = 175 atm
Initial Volume = 10.0L
Final Temperature = 25°C
Final Pressure = 1 atm
Final Volume = ?
This question is an illustration of ideal gas law.
From the given parameters, the initial temperature and final temperature are the same; this implies that the system has a constant temperature.
As such, we'll make use of Boyle's Law to solve this;
Boyle's Law States that:
P₁V₁ = P₂V₂
Where P₁ and P₂ represent Initial and Final Pressure, respectively
While V₁ and V₂ represent Initial and final volume
The equation becomes
175 atm * 10L = 1 atm * V₂
1750 atm L = 1 atm * V₂
1750 L = V₂
Hence, the final volume that can be stored is 1750L
Balance the following equation. ______ MgCl 2 + _____ AgNO 3 → _____ AgCl + ____ Mg(NO 3 ) 2
Answer:
so it will be 1MgCl2 + 2AgNo3 ➡️ 2AgCl + 1Mg(No3)2
if the coefficient is 1, it is not essential to write it in front of thw formula
Answer:
_blank_ MgCl 2 + _2_ AgNO 3 → _2_ AgCl + _blank_ Mg(NO 3 ) 2
Hope This Helps :)
2 Pc
What energy transfer is occurring when you make a call on a phone?
A. electrical to chemical
B. heat to sound
C. electrical to sound
O
OD. chemical to light
Reset Selection
Answer:
electrical to sound
Explanation:
The total energy of a system remains constant always. In case of a phone, the battery of phone has chemical items. The chemical energy of the battery gets converted to the electrical energy into the phone. As a result, the electrical energy gets converted to sound energy.
Hence, the correct option is (C) "electrical to sound energy".
solve the following (3x10^9)(4x10^5)/(6x10^-3)
Answer"
[tex]2(10^{17})[/tex]
Explanation:
You can simply just plug this into your calc and you should get the answer. Alternatively, when you multiply exponents, you add them, so you know you answer would be something times [tex]10^{17}[/tex]. After finding that out, you multiply 3 by 4 (which is 12), and divide by 6, which gives you 2. Multiply the 2 together and you get your answer.
Find the area shaded in yellow.
[ ? ] square units
Answer:
A(yellow) = 52
Explanation:
A(yellow) = A(total) - A(red)
= 11×6 - 7×2
= 66 - 14
= 52