Answers
Answer:
1) increases
2)increases
3) Decreases
4) increases
5) increase
6) decreases
Explanation:
Let us remember that in a solid, the molecules of the substance are trapped in fixed positions hence the entropy of a solid is less than that of liquid as well as less than the entropy of a gas.
Reaction (1) and (2) deal with a change of state from solid to liquid or gas leading to increase in entropy.
In reaction (3) the aqueous reactants convert into a liquid product leading to a decreases in entropy.
Reaction (4) and (5) has to do with change of a solid to a gas as well as an increase in volume leading to an increase in temperature.
For reaction(6), a solid is formed so entropy decreases
Related Questions
HCO3− + H2S → H2CO3 + HS−
In the reaction above, what is the Bronsted-Lowry acid?
Answers
Answer:
H₂S is the proton donor => Bronsted Acid
Explanation:
which alkaline earth metal is the components of quick lime
Answers
Answer:
Calcium
Explanation:
is a silver-gray metal which takes its name from the Latin word calx, which means lime. It is the fifth most abundant element in the earth's crust and is widely distributed as limestone (CaCO3), quicklime (CaO) and calcium fluoride.
Alkaline earth metals are present on the left of the periodic table. Therefore, calcium is the alkaline earth metal is the components of quick lime.
What is metal ?Metals are those elements which is hard, conduct electricity, ductile, lustrous and malleable.
The properties of metals are:
1.Since metals have free electrons that's why they can conduct electricity
2. Since atoms in metals are very closely packed in a definite crystal so these are solid. It is not brittle that is it can not be broken down easily
3. It does not react with water easily.
4.It is denser than water hence it sink in water.
The formula for quick lime is quicklime (CaO). The alkaline earth metal that is component of quick lime is calcium Ca. Quick lime is used in white washing.
Therefore, calcium is the alkaline earth metal is the components of quick lime.
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when combined the two substances together in the cup, the product can be described as a ____ or ____ (there are two possible answers . you just need to choose one )
1. white gas
2. white liquid
3. white solid
Answers
How many molecules are in 7V205?
Answers
Answer:
Calculate the number of moles you have by taking the Mass / molar mass. if you have 1000 grams ; then 1,000 g / 151.001 g/mol = X g moles. Then multiply by Avogadros # = 6.022140857 × 10^23 molecules per g mole. The result is the # of molecules of MnSO4
Explanation: Hope this helps
according to periodic trends which element would have more valence electrons than sulfur
Answers
Answer:
Chlorine,Argon
Explanation:
All the elements of group 18 and group 17
The periodic table depicts the various elements arranged based on the increasing order of their atomic numbers. Argon and chlorine will have more valence electrons than sulfur.
What is the periodic trend of valence electrons?A valence electron is an electron of an atom present in the outermost shell that participates in bond formation. The valence electrons are the same in elements placed in the same group or family.
The number of valence electrons increases in a horizontal row called the period of the periodic table. As when one moves from left to right in a period the valence electron increases.
The number of valence electrons in a sulfur atom is 6, whereas in chlorine is 7 and in argon is 8. As chlorine and argon are placed after sulfur in a period will have more valence electrons.
Therefore, argon and chlorine have more valence electron than sulfur.
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NaCl + NH3 + CO2 + H20 NaHCO3 + NH4CI
Which Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation?
Answers
That leaves us with drawing the structure of NH4Cl.
This was a tough one for me to find, as I kept drawing Ammonia instead and couldnt figure out how to fit in the extra Hydrogen and Chlorine. Luckily, this Y!A answer explains it, its due to a hydrogen bond
Option (1) represents the Lewis electron-dot diagram correctly containing nitrogen in the equation.
Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms.
Valence electrons are given by hydrogen atoms = [tex]1\times3=3[/tex]
Valence electrons are given by nitrogen atom = [tex]5\times1=5[/tex]
Total valence electrons = 3 + 5 = 8
So, the calculation above is shown only the first option. So, (1) Lewis electron-dot diagram correctly represents the reactant containing nitrogen in the equation.
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How can a paperclip float on water? Use the
word 'surface tension' in your answer,
Answers
Help plz pozlzlzksj help
Answers
Answer:
increase moles of gas inside
Explanation:
Answer:
Its ( C )- Decrease the temperature of the gas inside the basketball
Explanation:
To make sure the balloon doesn't inflate so much it bursts you should NOT completely inflate the balloons when you know the temperature will increase!
What is the temperature in kelvin of a gas if it is allowed to expand from 1.50 L to 4.50 L? The initial temperature is 10.0°C and pressure is constant throughout the change.
Which equation should you use?
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
T subscript 2 equals StartFraction V subscript 1 over V subscript 2 EndFraction T subscript 1.
T subscript 2 equals StartFraction V subscript 2 over V subscript 1 EndFraction T subscript 1.
Answers
Answer:
first question is the third option and the second question is 849K.
Explanation:
Answer:
third option
849K
Explanation:
Gold has a molar mass of 197.0 g/mol. What is the concentration of gold in seawater in moles per liter?(please show work)
Answers
Answer:
Since you didnt get asked for a spefic weight of gold lets assume it was 5g
Explanation:
5g Au/197 =.02538 mols in 1 liter of sea water is
.02538/1L which gives you a Molarity of .012538 assuming 5g if they ask for a different number just replace 5 with any weight in grams
what is condensation transfer of energy?
Answers
Answer:
Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.
Hopefully this helped :)
Can you divide equation II by another factor and still have it be correct? Why or why not?
Answers
Answer:
No. You can not simplify a coefficient of.
Explanation:
:)
the atoms in the same period on the periodic table all have what ?
A - The same abbreviation
B - The same number of electron shells
C - the same number of electrons
D - the same number of electrons on the outer energy level
Answers
Answer:
B.
Explanation:
A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.
15) When dilute sulfuric acid is added to zinc metal the products of the reaction are
A zinc oxide + water + hydrogen
B zinc oxide + hydrogen
C zinc sulfate + water + hydrogen
D zinc sulfate + hydrogen
Answers
what is haemoglobin? Name its function.
Answers
Answer:
Haemoglobin is the red pigment which is present in our blood and helps in transporting oxygen to different parts of our body.
Hope it helps
Answer:
Haemeglobin is a red substance that has the function of transporting oxygen into the blood.
Explanation:
Lions eat antelopes. Antelopes eat plants.
A lion is eating an antelope.
Which of these statements correctly describes what is happening when a lion eats an antelope?
A carnivore is eating its prey
B herbivore is eating its prey
C predator is eating a carnivore
D prey is eating a herbivore
Answers
Answer:
A
Explanation:
lions only eat meat, antelopes are prey
Select the correct answer.
Copper carbonate (CuCO3) reacts with hydrochloric acid (HCl) according to this equation:
CuCO3(s) + 2HCl(aq) → CuCl2(aq) + H2O(l) + CO2(g).
Which statement correctly describes the substances in this reaction?
A.
Exactly one product and two reactants are either liquid or dissolved in water.
B.
Exactly one of the reactants is in a water-based solution, but none of the products are.
C.
The reactants include both a liquid and a gas.
D.
Exactly one reactant is a solid, and exactly one product is a gas.
E.
The products include a solid, a liquid, and a gas.
Answers
Answer:
I think the answer would be option d.
hope it helps.
the more massive an object is, the more
Answers
Answer:
it have more more mass, gravitational potential energy
Explanation:
How many valence electrons does the following element have? 1s2 2s2 2p6 3s1
Answers
balance the following equation FeC²+Cl². FeCl³
Answers
Answer:
this equation is not proper see that where is the reactant.
Explanation:
give give a proper question and I will
if fecl2 + c2 gives a fecl3 where does the carbon compound go
Answer:
2FeCl2 + Cl2 → 2FeCl3
Explanation:
Compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07% Write the molecular formula of X .
Answers
Answer: N2F4
Explanation:(NF2)x2 = N2F2
The compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07%, then the molecular formula of X is N2F4.
What is molecular formula?Molecular formula is defined as a chemical formula that give the total number of atoms of each elements in each molecule of a substance.
It can also be defined as a phrase that specifies the number of atoms of each element in a complex molecule.
It represents the actual number of each atom in a molecules.
It tells us which atoms and how many of each types of atoms are present in a molecule.
NF2 x 2 = N2F4
Thus, the compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07%, then the molecular formula of X is N2F4.
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2. Each type of atom is called an element. Which part of the atom give the
atoms its Identity?
Answers
The smallest particle of an element which is indivisible and takes part is chemical reaction as a whole without division is called an atom.
the three fundamental particles that identify the atoms are protons, neutrons and electrons.
1. MnO₂ is an example of what type of bond?
a covalent
b ionic
c polyatomic ion
2. Cl is an example of a cation, anion, or polyatomic ion
a polyatomic ion
b anion
c cation
Answers
Answer:
1. covalent
2. polyatomic ion
Explanation:
:)
Answer:
1) b
2)c
Explanation:
what is the percent of aluminum found in Al2SO4
Answers
Answer:
15.772%
Explanation:
What colour change would you notice with China rose indicator when you add it to soap water and vinegar?
Answers
word equations- Please help ASAP
Answers
Answer:
See answer below
Explanation:
In this case, you just need to use any acid you want (Like HCl, or H₂SO₄) to do this exercise.
You are given a sample of what you have to do which is:
Acid + metal ------> Salt + hydrogen
As you can see, an acid like the ones I wrote above, have hydrogen atoms, so you should put the hydrogen there. As for the part of salt, you just need to draw the corresponding salt that is formed when the acid reacts with the metal, and write it's name.
Let's do all three equations for you to a better understanding. For all the given examples, I will use HCl as acid, and i will explain one reaction cause the other two reactions happens the same thing, only with a different metal.
1. 2HCl + Zn ------> ZnCl₂ + H₂
As you can see, we just have a displacement reaction where the metal displaces the position of the hydrogen to form the salt and the hydrogen leaves the molecule as a gaseous molecule. Written in words it would be:
Hydrochloric acid + Zinc ----> Zinc chloride + hydrogen
2. 2HCl + Pb -------> PbCl₂ + H₂
Hydrochloric acid + lead ------> Lead (II) chloride + hydrogen
3. 2HCl + Fe -------> FeCl₂ + H₂
Hydrochloric acid + iron ------> Iron (II) chloride + hydrogen
Hope this helps
2 Write a word equation and
a symbol equation for the
reaction of solid zinc oxide
(ZnO) with sulfuric acid.
Answers
Answer:
Zinc oxide is react with sulphuric acid to give zinc sulphate and water.
zinc oxide +sulphuric acid ⇒ zinc sulphate + water
Zno +H2So4 ⇒ZnSo4 + H2O
SULPHURIC ACID = H2SO4
ZINC SULPHATE =ZnO
Explanation:
what is the mass of 0.75 mol of hydrogen sulfide
Answers
Answer:
25.56066
Explanation:
hope this helps !!!!!!! and sorry if it doesn't help
Molar Concentration of H2O+ lons
in Four Solutions
Solution Molar Concentration
of H3O+ lon
(M)
A 0.1
B 0.01
с 0.001
D I’m 0.0001
Which solution has the highest pH?
Answers
Answer:
d
Explanation:
because it’s moving the most spots to the left
The acidity or alkalinity of a solution depends upon its hydronium ion concentration and hydroxide ion concentration. Here among the given solutions, the solution D has the highest pH. The correct option is D.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. The pH scale is introduced by the scientist Sorensen. It is more easy to express the concentration of H₃O⁺ using this method.
The equation used to calculate the pH of the solution is given as:
pH = -log[H₃O⁺]
For 0.1 M
pH = -log[0.1] = 1
For 0.01 M
pH = -log[0.01] = 2
For 0.001 M
pH = -log[0.001] = 3
For 0.0001 M
pH = -log[0.0001] = 4
So solution D has the highest pH which is 4.
Thus the correct option is D.
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what's the difference between viscosity and flow rate
Answers
Answer:
Flow rate is how fast a fluid moves. The flow rate can depend on several factors. These factors are the type of fluid that you are using, the force that is pushing on a fluid, the size of the pipe the fluid flows from and the type of surface the fluid flows over. Viscosity is the resistance of a fluid to flow.
Explanation:
just looked it up