The compound potassium carbonate is a strong electrolyte. Write the reaction when solid potassium carbonate is put into water
Answer:
K2CO3 (aq) ---> 2K+ (aq) + CO32- (aq)
Explanation:
Dissociation refers to the ability of an ionic compound to breakdown into its respective ions. An ionic compound is formed by the combination of a positive ion (cation) and a negative ion (anion). When these ionic compound dissolves in water, it dissociates i.e. separates into its constituent ions.
In this question involving potassium carbonate being described as a strong electrolyte, which means that it dissociates completely in water as follows:
K2CO3 (aq) ---> 2K+ (aq) + CO32- (aq)
1.
10
2.
3.
4.
60
Which polygons are similar?
110
60
10
01
02
03
04
Answer:
The answer is "1 and 4 polygons were similar".
Explanation:
In the given question, in both figures 1 and 4, it's measure angle were 10, 60, 110. In figure number 4, its angle is 10, 60, and on the third side, its value is equal to 110, which is (180 - 70).
how do computers use input and output to get and give the imformation that tney need to solve problem
Answer:
Question of the Day: How do computers use input and output to get and give the information that they need to solve problems? Typing on a Keyboard (Input) Makes Letters Appear on a Screen (Output) Moving a Mouse or Touch Screen (Input) Changes What Appears on the Screen (Output)
If the pressure on 36.0 mL of a gas at STP is changed to a pressure of 35.3 kPa at constant temperature, the new volume of the gas is:
The new volume of the gas : 103.334 ml
Further explanationBoyle's Law
At a constant temperature, the gas volume is inversely proportional to the pressure applied
[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]
1 kPa = 0,00986923 atm
35.3 kPa = 0,3483839 atm
at STP ( 0°C, 1 atm) with volume 36 ml changed to 35.3 kPa :
P₁=1 atm
V₁=36 ml
P₂= 0,3483839 atm
The new volume(V₂) :
[tex]\tt V_2=\dfrac{P_1.V_1}{P_2}\\\\V_2=\dfrac{1\times 36}{0,3483839}=103.334~ml[/tex]
Considering the patterns you have noticed in this activity, which statement best explains why a compound with the molecular formula CH3 doesn't exist in nature?
A. Hydrogen typically needs four bonds to reach a noble gas configuration.
B. Carbon needs more than just three bonds to reach a noble gas configuration. C. The chemical CH3 does not react with other substances because of its high stability.
D. CH3 has three double bonds, which fails to give it a noble gas configuration
Answer:
The answer is B
Explanation:
I had the same question and I chose B and it was correct.
Answer:
B. Carbon needs more than just three bonds to reach a noble gas
Explanation:
PLATO ANSWER
PLATO EXPLANATION-
Each hydrogen atom can make only one bond, but a carbon atom needs four bonds to be stable. Therefore, three hydrogen atoms are not enough for the carbon atom to make four bonds.
Which element is the most similar to calcium ca
Answer:
strontium
Explanation:
Answer:
Strontium
Explanation:
This is a earth metal, calcium is a reactive metal that forms a dark oxide nitride layer when exposed to air.
What are valence electrons? How would you determine the valence electrons of Oxygen?
Answer:
Valence electrons are the electrons located on the outer shell of the atom. To determine valence electrons of oxygen you can count how many electrons ae on the last shell of it's bohr diagram.
Explanation:
Question 11. Identify the reducing agent
Sn+2 + AG 0 —> Sn0 + Ag+
Answer:
Ag 0 is the reducing agent.
Explanation:
Reducing -> gaining electrons
Oxidizing -> losing electrons
Ag lost electrons (became more positive) since it went from a 0 charge to a +1 charge. Therefore it was oxidized. Ag+ is the oxidized product. Reactants that create an oxidized product are called reducing agents. This would make Ag 0 the reducing agent in this reaction.
H2SO4(aq)+NaOH(s)> (neutralization of both acidic protons)
H2SO4(aq)+NaOH(s)----->NA2SO4 + H20
When acid and base reaction takes place, it will form salt formation takes place. I.e., neutralization reaction. H₂SO₄+2NaOH→ Na₂SO₄+ 2H₂O.
What is neutralization reaction?A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products.
H₂SO₄ is an acid and NaOH is a base. Acid react with base to form salt and water. Salt will be neutral charge and net ionic charge is zero.
Neutralization takes place when, complete dissociation takes place. If any partial dissociation, it will form acidic salt or neutral salt.
Thus complete dissociation neutral reaction is
H₂SO₄+2NaOH→ Na₂SO₄+ 2H₂O.
To find more about acid and base, refer the link below:
brainly.com/question/3941445
#SPJ2
Bromine gas in a container is heated over a flame. What happens to the average kinetic energy of the bromine particles? It decreases rapidly. It increases quickly. It remains the same. It decreases slowly.
Answer: B. It increases quickly
Explanation:
As the bromine gas in a container is heated over a flame, the average kinetic energy increases quickly.
Kinetic energy of gas moleculeThe temperature of gas molecules is the measure of average kinetic energy of the gas molecules.
The increase in temperature increases the heat gained by the gas molecules which in turn increases the average kinetic energy of the individual gas molecules.
Thus, as the bromine gas in a container is heated over a flame, the average kinetic energy increases quickly.
Learn more about average kinetic energy of gases here: https://brainly.com/question/952575
Q2 A solution has a (OH-) = 4.0x10^-5 M. What are the [H30+) and the pH of the
solution?
Answer:
[H₃O⁺] = 2.5 × 10⁻¹⁰ M
pH = 9.6
Explanation:
Step 1: Given data
Concentration of OH⁻ in the solution ([OH⁻]): 4.0 × 10⁻⁵ M
Step 2: Calculate the concentration of H₃O⁺ in the solution
Let's consider the self-ionization of water.
2 H₂O(l) ⇄ H₃O⁺(aq) + OH⁻(aq)
The ion-product of water (Kw) is:
Kw = 1.0 × 10⁻¹⁴ = [H₃O⁺] × [OH⁻]
[H₃O⁺] = 1.0 × 10⁻¹⁴/[OH⁻]
[H₃O⁺] = 1.0 × 10⁻¹⁴/4.0 × 10⁻⁵
[H₃O⁺] = 2.5 × 10⁻¹⁰ M
Step 3: Calculate the pH of the solution
We will use the following expression.
pH = -log [H₃O⁺]
pH = -log 2.5 × 10⁻¹⁰
pH = 9.6
Taking into account the definition of pH and pOH, the pH and [H₃O⁺] of the solution is 9.602 and 2.5×10⁻¹⁰ M respectively.
First of all, pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:
pH= - log [H⁺]= - log [H₃O⁺]
Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:
pOH= - log [OH⁻]
The following relationship can be established between pH and pOH:
pH + pOH= 14
In this case, you know that [OH⁻]= 4×10⁻⁵ M. For this concentration, the pOH is calculated as:
pOH= - log (4×10⁻⁵ M)
pOH= 4.398
Then, pH can be calculated as:
pH + 4.398= 14
pH= 14 - 4.398
pH= 9.602
So, the [H₃O⁺] is calculated as:
9.602= - log [H₃O⁺]
[H₃O⁺]= 10⁻⁹ ⁶⁰²
[H₃O⁺]= 2.5×10⁻¹⁰ M
Finally, the pH and [H₃O⁺] of the solution is 9.602 and 2.5×10⁻¹⁰ M respectively.
Learn more:
brainly.com/question/13557815?referrer=searchResultsHow many electrons are in the nucleus of an atom with an atomic number of
16?
O None. Electrons are not in the nucleus
08
O 16
O 32
Answer:
None. Electrons are not in the nucleus.
Explanation:
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.
Symbol of proton= P⁺
Symbol of neutron= n⁰
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral .
The atom having atomic number 16 have 16 electrons and these electrons are present out side the nucleus.
A major contributor to the “hole” in the ozone layer:
A. carbon
B. nitrogen
C. fluorine
D. the polar vortex
E. the tilt of the Earth
Answer:
I think it's D, the Polar Vortex.
Answer:
A
Explanation:
Chlorofluorocarbons (from aerosols, and a type of carbon!) are super damaging to the ozone layer and actually breaks down the ozone particles!
Sorry! Reposting bc my answer got deleted, I'm assuming it's because I had a link to my source!
The fact that atoms and molecules are always in motion helps scientists explain how solids turn into liquids. What is this explanation an example of? A.
a hypothesis
B.
an observation
C.
a scientific law
D.
a scientific theory
How many atm is 25.0 psi?
Answer:
1.70115 or 1.70 atm
Explanation:
1 psi is equal to 0.068046 atm.
Who can do my chemistry? It's due tonight, please! It’s about solubility interactive
Answer:
I can, i love chemistry
Explanation:
11
SKILL LEVEL
Proficient
Which substance conducts electricity in the liquid state but is a
poor conductor in the solid state?
a: Li₂O
b: SeCl2
C: P205
d: Hg
Answer:
a: Li₂O
Explanation:
Ionic compounds are good conductors only in liquid state. They do not conduct electricity in their solid state.
The only ionic compound from the given choices is Li₂O.
Ionic compound do not conduct electricity in their solid state because their ions are locked and are not free to move about their fixed lattice. In liquid states, they go into solution and they are free to move thereby acting as a good conductor.
what is normality and molarity of the concentration of solution?
Answer:
Normality is the number of gram equivalents of solute divided by the volume in liters.
The molarity is the amount of moles in solute divided by the volume in liters.
Moles are the molar mass times grams if you're curious
I hope this helps and good luck!
Answer:
Molarity and normality describe the numbers (moles) of reactants or products dissolved in one liter of solution. Molarity: M = moles of solute contained in one liter of solution. ... Normality is always a multiple of molarity. It describes the “equivalent” moles of reactants involved in chemical reactions.
Explanation:
Normality is a measure of concentration equal to the gram equivalent weight per litre of solution. Gram equivalent weight is the measure of the reactive capacity of a molecule. The solute's role in the reaction determines the solution's normality. Normality is also known as the equivalent concentration of a solution.
Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution.
Formula for Molar: M = [tex]\frac{n}{v}[/tex]
Regional Metamorphism occurs when great masses of rock are exposed to pressure. What does this typically form?
Answer:
Gneiss forms by regional metamorphism from both high temperature and pressure. Quartzite and marble are the most commonly used metamorphic rocks.
Why is Mg++ smaller than Mg atom?
Answer:
The magnesium ion is much smaller than the magnesium atom because magnesium atom contains more electrons as compared to magnesium ion. Explanation: ... Whereas when an atom tends to lose an electron then it acquires a positive charge and size of the atom tends to increase.
Answer:
Because it looses it two electrons to form a stable octet Ionic form..........
Sulfur has an electronegativity of 2.58, while Cesium has a value of 0.79. Based on this information, they would have what kind of chemical bond?
Answer:
Ionic
Explanation:
Because sulphur is a non-metal and cesium is part of the group 1 Alkali Metals, this creates an ionic bond
Ionic bonds are created from one metal and one non-metal element.
This still is declared as Ionic despite the balance of this is Cs2S
which element forms the skeleton of this polymer?
a.carbon
b.copper
c.hydrogen
d.oxygen
Answer: A - Carbon
Explanation: Hope this helps!
What kinds of things can we learn by studying atoms?
Answer:
how and why things react, like why something turns into a gas or why something explodes.
Explanation:
How many molecules are there in .0023kg of NH4SO2?
Answer:
Molar mass of NH4SO2=104gmol`
No of moles of NH4SO2=2.3g/104gmol`=0.022×(avagadro's constant)
Write the net ionic equation for the reaction that occurs when equal volumes of 0.080 M aqueous acetic acid and sodium nitrite are mixed. It is not necessary to include states such as (aq) or (s).
Answer:
CH₃COO⁻ + NaNO₂ → CH₃COONa + NO₂⁻
Explanation:
When equal volumes of 0.080 M aqueous acetic acid and sodium nitrite are mixed (1:1), we have:
Acetic acid = CH₃COOH
Sodium nitrite = NaNO₂
The molecular equation is:
CH₃COOH(aq) + NaNO₂(s) → CH₃COONa(s) + HNO₂(aq)
The ionic equation is:
CH₃COO⁻H⁺ + Na⁺NO₂⁻ → CH₃COO⁻Na⁺ + H⁺NO₂⁻
The net ionic equation is:
CH₃COO⁻ + NaNO₂ → CH₃COONa + NO₂⁻
I hope it helps you!
Is this an example of decomposition
2CH4 + 402 → 2C02 + 4H2O
Answer:
Identify each equation as a composition reaction, a decomposition reaction, or neither.
Fe2O3 + 3 SO3 → Fe2(SO4)3
NaCl + AgNO3 → AgCl + NaNO3
(NH4)2Cr2O7 → Cr2O3 + 4 H2O + N2
Solution
In this equation, two substances combine to make a single substance. This is a composition reaction.
Two different substances react to make two new substances. This does not fit the definition of either a composition reaction or a decomposition reaction, so it is neither. In fact, you may recognize this as a double-replacement reaction.
A single substance reacts to make multiple substances. This is a decomposition reaction.
Test Yourself
Identify the equation as a composition reaction, a decomposition reaction, or neither.
C3H8 → C3H4 + 2 H2
Explanation:
I hope I help :)))
What does RAP mean (this for science this is counting atoms btw help if you can)
Answer:
rapid assessment procedure
Abbreviation for: rapid assessment procedure. Rapid Assessment Process. rapid atrial pacing. referrals, assessments and packages of care.
Explanation:
Hope this helps you
What is the zonecreated if force of separation occurs?
the earth is 24,901 miles. how many hours would it take to travel around the earth if traveling 100 meters per second?
Answer:
24,901 x 1609.34 = 40074275
40074275/100 equals
400742.75 s
divided by 3600
111.31
Explanation:
How did the instrument in the picture help to disprove part of Dalton's atomic model?
A)
It showed all matter is made of atoms and that atoms are indivisible and
indestructible.
B)
It showed that all atoms of a particular element are not identical.
C)
It showed that compounds are formed by a combination of two or more
different kinds of atoms.
D)
It showed that a chemical reaction is a rearrangement of atoms.
No
Answer:
It’s b;)
Explanation:
Answer:
B is correct
Explanation:
