When silver nitrate (AgNO3) dissolves in water, the temperature of the solution decreases.
Explain your answer
Answers
Answer:
The enthalpy of solution for AgNO3 is positive because the temperature of the solution decreases (the dissolution is endothermic). Hsol = Hsolute + Hsolvent + HmixHsolute and Hsolvent are endothermic because energy is required to overcome intermolecular forces and separate solute and solvent particles.
Answer:
the enthalpy of solution for agno3 is positive because the temperature of the solution decreases. (the dissolution is endothermic.)
Delta H sol=delta HSolute +delta H solvent +delta H mix
HSolute and H solvent are endothermic because energy is required to overcome intermolecular forces and separate solute and solvent particles.
H mix is exothermic because energy is released when intermolecular forces form between solute and solvent particles.
if the overall enthalpy of solution is positive, then HSolute + H solvent must be larger in magnitude than H mix.
Explanation:
correct on edge2021
Related Questions
The breaking down or wearing away of rock and soil is known as... A. earthquake
B. global shift C. weathering D. deposition
Answers
Answer:
the breaking down of rock is known as weathering
If sodium (Na) bonds with chlorine (Cl), which statement is true?
An electron is transferred from sodium to chlorine and an ionic bond is
formed.
An electron is shared between sodium and chlorine and an ionic bond is
formed.
An electron is transferred from sodium to chlorine and a covalent bond is
formed.
An electron is shared between sodium and chlorine and a covalent bond is
formed.
Answers
Answer:
First Statement is correct
Explanation:
An electron is transferred from sodium to chlorine and ionic bond is formed.
Hope it help!!
If sodium ( Na ) bonds with chlorine ( Cl ), then an electron is transferred from sodium to chlorine and an ionic bond is formed. Therefore, option A is correct.
What is ionic bond ?The main interaction taking place in ionic compounds is ionic bonding, a form of chemical bonding that includes the electrostatic attraction between two atoms or ions with dramatically differing electronegativities.
When the ionic character is larger than the covalent character, i.e., when there is a significant difference in the electronegativity between the two atoms, the bond is more polar than when the electrons are divided more evenly in covalent bonding.
The ionic bond found in the salt sodium chloride is an illustration of this type of connection. The valence electron from sodium is transported to chloride's outer electron shell.
Thus, option A is correct.
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Na on the periodic table is the symbol for what?
Answers
Answer:
sodium
Explanation:
Na is the symbol for sodium on the periodic table
Answer: Sodium is a chemical element with the symbol Na (from Latin "natrium") and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23 Na.
Explanation:
Please help
according to the ____ rule, elements tend to react until they have the same electron configuration as a _____. _____, found on the left of the _____, tend to lose electrons and from ____. _____ tend gain electrons to form _____.
Answers
Answer:
What chapter is this and what grade are you, i can check this for you
Explanation:
. ILL GIVE BRAINLY
Why does the top layer of the rainforest receive the most sunlight?
Its tall trees rise above all the other layers.
The plants there have very broad, dark green leaves.
It has many trees and vines.
The trees there are thicker than in the other layers.
Answers
Answer:
It has many trees and vines
Explanation:
Answer:it’s tall trees rise above all the other layers
Explanation:
The quiz said so
Which phrase describes runoff?
1.underground water that flows into lakes
2.river water that empties into an ocean
3.water from streams that flows into larger rivers
4.water from rain and snow that travels to streams
Please help!
Answers
Explanation:
water from rain and snow that travels to streams
Please help!
Water from a rain and snow that travels to streams are examples of run off. These natural processes are part of water cycle and balance the water content in the atmosphere and hydrosphere.
What is water cycle ?Water cycle is a geological phenomenon to balance the water content in the atmosphere, hydrosphere and in the biosphere. The water bodies evaporate by the heat radiated by sun.
The air moisture can be restored to the land through the cooling of the vapor and pour as rain. This best illustrates the interaction between atmosphere and hydrosphere.
Rain, snow, sleet, or hail that reaches a surface stream without ever going below the soil's surface is referred to as surface runoff. It differs from direct runoff, which is runoff that directly reaches surface streams following rainfall or snowmelt. Hence option 4 is correct.
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if you have 3.4 grams of carbon how many moles of carbon would you have
Answers
Answer would be 0.2830809 I don’t know what you would round to but there’s the answer
Why is 1/t used as a measure of rate of reaction?
Answers
1/t denotes that the reaction order is of the first order. That is, the rate of reaction is directly proportional to the concentration of the reactant. Because scientists use standard units, 1/t equals one divided by one second.
What do you mean by first order reaction ?The term first order reaction is defined as a chemical reaction in which the reaction rate is linearly dependent on the concentration of only one reactant.
In other words, a first-order reaction is a chemical reaction in which the rate varies as the concentration of only one of the reactants changes.
Because a reaction that takes longer to complete is obviously a slower reaction. A fast reaction is one that takes less time to complete. 1/t simply provides a quantitative value for comparing reaction rates.
Thus, 1/t denotes that the reaction order is of the first order.
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HELP ASAP PLS AHHH ty
Answers
Answer: a for the first one , d for the second one, b for the third one.
Explanation:
Answer:
A: Main sequence star.
B: White Dwarf.
C: Black hole.
Explanation:
Brainliest please.
Oxygen has 8 positively charged protons what is the number of negatively charged electrons in an atom of oxygen?
Answers
Answer:
8 electrons (e-)
Explanation:
In the atom of every elements, there are three sub-atomic particles namely: protons, electrons, and neutrons. The protons are the positively charged particles, the electrons are negatively charged while the neutrons are neutrally charged.
In an uncharged or neutral atom i.e. charge 0, the number of protons is always equal to the number of electrons because they cancel each other out. When a difference occurs in the number of these particles, the atom becomes charged i.e. an ion. According to this question, oxygen atom (O) contains 8 positively charged protons, this means that it also contains 8 negatively charged electrons in its atom.
What are periods on the periodic table? How many are there?
Answers
Mg3N2+3H2O-3MgO+2NH3 If 17 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20°C and 0.989 atm?
Answers
Explanation:
what are the unit given for the questions
Sexual reproduction involves male and female sex cells known as ______.
Answers
Answer:
Sexual reproduction involves male and female sex cells known as - Gametes
Explanation:
In sexual reproduction new organisms are produced from the fusion of a male sex cell with a female sex cell. This fusion of gametes is called fertilisation. Sex cells are also known as gametes. Male gametes are made by male reproductive structures. Female gametes are made by female reproductive structures.
Question 5
4
What type of plate boundary involves plates moving away from each other?
convergent
divergent
transform
Answers
Answer:
A divergent boundary!
Explanation:
A divergent boundary occurs when two plates move away from each other, while a convergent boundary is when two plated collide. And a transform plate boundary is when two plates horizontally slide against each other.
I hope this helps! ^^
☁️☁️☁️☁️☁️☁️☁️
Answer:
The answer is Divergent boundaries
dilute hydrochloric acid+zinc metal
Answers
Explanation:
2HCl+2Zn----> 2ZnCl+H2
Explanation:
HCL + Zn= zncl2 + H2
plz mark my answer as brainlist if you find it useful.
HELPPPP I NEED TO SEND THEM TO MY TEACHER ITS REACTIONS AND SOME OF THEM MIGHT CANT HAPPEN
Answers
Answer:
Explanation:
follow the rule of "a weak acid can't make a stronger acid and weak base can't make a stronger base(it's pretty accurate for acid/salt reactions/replacemnts)" the last reactions won't work, but the second to last one will be kbr+pb(no3)2-> kno3 + PbBr2 (this is unballanced.) the first reaction will work. the second one i'm not too sure tbh, but i think it won't work since barium hydroxide's a weak base and if it were to react it would make koh, a super strong base
Answer:
3Ba(OH)2 + 2K3PO4 ----> 6KOH + Ba3(PO4)2
2KBr + Pb(NO3)2 ------> 2KNO3 + PbBr2
H3PO4 + 3KCl -----> K3PO4 + 3HCl
Explanation:
please help!!! will give brainliest!!! 30 points! (need to put roman numeral in answer)
Answers
1. Nickel (II) Bromide
2. Iron (II) Oxide
3. Iron (III) Oxide
4. Tin (IV) Chloride
5. Lead (IV) tetrachloride
6. Tin (II) Bromide
7. Chromium (III) Phosphide
8. Iron (II) Fluoride
9. Gold (III) Chloride
I hope this helps. I'm more than 100% sure that all the answers except for number 7 are correct. I knew all of them off the top of my head except for this one. I hope the other answer has the correct answer for that one. Good luck and have a great day.
What does a nonpolar covalent bond show about the electronegativities of its
two atoms?
A. The electronegativity of both of the atoms is zero.
B. The electronegativities of the two atoms are equal.
O c. The difference in electronegativities of the two atoms is very
small.
O D. The difference in electronegativities is greater than 1.7.
Answers
Answer:
B. The electronegativities of the two atoms are equal.
Which of the following statements is the best example of an interaction between the atmosphere and the hydrosphere ? Done rnnnn
Answers
Will a nucleus of Zn-65 be stable or unstable?
Answers
Answer:
Unstable
Explanation:
Complete the sentence. Atoms form chemical bonds to satisfy the rule and to become Å Done Intro -
Answers
Answer:
Sorry
Explanation:
I m very sorry I don't know this
i need help writing a LAB REPORT about NATURAL SELECTION
(plus i don’t know what exact subject it is so i’m sorry if it’s the wrong subject)
Answers
Answer:
Translate from Ukrainian.
У цей приклад я візьму селекції пшениці. Коли ми будемо говорити про селекцію цього злака, то ми можемо отримати меньшу собівартість, та вартість вирощування. Збільшена урожайність, та менша потреба в гербіцидах, пестицидах, та інсектицидах це теж наслідок. Тому селекція це майбутнє!
How does fertilizer affect nitrogen cycle
Answers
Cuando se usa demasiado fertilizante para las plantas una parte de ese nitrógeno no vuelve a la atmósfera y a cambio contamina el medio ambiente
Explanation:
the nitrogen cycle is a natural process that adds nitrogen to the soil. however the use of fertilizer has increased the amount of usable nitrogen in the soil
A boat at rest on the ocean moves up and down as water moves past it. What can be concluded about the nature of the water particles in the waves from rl this observation
Answers
3. Which of the following is NOT an assumption of the
kinetic-molecular theory?
a. Collisions between gas particles are elastic.
b. All the gas particles in a sample have the samel
velocity
c. A gas particle is not significantly attracted or
repelled by other gas particles.
d. All gases at a given temperature have the same aver-
age kinetic energy.
Answers
PLEASE HELP ME!!! I AM DESPERATE!!!
What causes infrared light to hit the ground?
Answers
Answer: The water vapor, carbon dioxide, methane, and other trace gases in the earth's atmosphere absorb the longer wavelength. These are all reasons why infrared waves hit the ground.
The water vapor, carbon dioxide, methane, and other trace gases in the earth's atmosphere absorb the longer wavelength. These are all reasons why infrared waves a part of electromagnetic spectrum hit the ground.
What is electromagnetic spectrum?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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Which is one of the Lewis structures for ozone?
000
:0:00
C:6
Answers
Answer:
D
Explanation:
Option D is the correct Lewis structure of ozone.
Ozone is known to be an allotrope of oxygen which has three atoms of oxygen.
In the Lewis structure of ozone, one pair of oxygen is actually double-bonded while the other is single-bonded. In this structure, two oxygen atoms carry charges. In the drawing the Lewis structure of ozone, we discover that one oxygen atom of the ozone has a -1 charge and while another oxygen atom of the ozone has a +1 charge.
where did all the elements in the universe come from?
Answers
Answer:
Wal-mart XDDDDD
Explanation:
Which phrase best describes the water cycle?
The physical processes that move water through the atmosphere
The interconnected, continuous processes that move water through Earth's spheres
Water changing from liquid to gas and back to liquid
The chemical components that make up water
Answers
Answer:
I think option B , bcz it is continuous process
The continuous, interconnected processes that move water through Earth's spheres best describe the water cycle. Therefore, option B is correct.
What is the water cycle?The water cycle can be demonstrated as the continuous movement of water from the Earth's surface to clouds and from clouds to the back surface. The sun, air, and other factors are included in the physical process of the water cycle, water goes through each of the states of matter such as solid, liquid, as well as gas.
The water cycle is a combination of the physical processes where water evaporates from the earth's surface into the atmosphere, cools down, condenses produces rain in clouds, and again comes back to the surface of the earth with the precipitation process.
Water on the Earth's surface of the water after rain gets collected in the form of rivers, groundwater, ponds, etc., and combines in oceans and gets evaporated.
The evaporation process includes the exchange of water from the surface in the form of water vapors to the atmosphere. The process of evaporation cools the temperature of the atmosphere as the sunlight on the surface of the earth makes the warm.
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I need help with this question ASAP
Answers
Answer:
True
Explanation:
Asexual reproduction does not involve sex cells or fertilization . Only one parent is required, unlike sexual reproduction which needs two parents. As a result, the offspring are genetically identical to the parent and to each other.
