Answer:
An acid dissociation constant, K a, (also known as acidity constant, or acid-ionization constant) is a quantitative measure of the strength of an acid in solution. It is the equilibrium constant for a chemical reaction ↽ − − ⇀ − + + known as dissociation in the context of acid–base reactions.
Explanation:
Mantle material rises in convection currents because heated materials become more dense.
True Or False
Answer:
True
Explanation:
A bobsled has a momentum of 4000 0 kg* m/s to the south. Friction on the track reduces its momentum to 500 kg* m/s to the south. What impulse is applied to the bobsled by the friction?
A. 6500 kg* m/s north
OB. 1500 kg* m/s south O
C. 6500 kg* m/s south
O 1500 kg* m/s north
Answer: 1500 kg•m/s north
Explanation:
A PE X
a student is asked to draw an atom of sulfur on a board. the pictures below represents what the student drew. what is wrong with this sulfur atom
plzzzz help i need to finish up
Ammonia (NH3) Is base.
How best do you describe Ammonia when dissolved in water
B. Ammonia forms a neutral solution.
C. Ammonia forms a buffered solution.
d. Ammonia acts as base because has OH- and makes water accepts hydrogen.
Answer:
Ammonia accepts a proton from water
Explanation:
Let us quickly remind ourselves of the Brownstead-Lowry definition of an acid. According to Brownstd-Lowry, an acid is any substance that donates hydrogen ions while a base is any substance that accepts hydrogen ions. The hydrogen ion is also known as a proton.
If we look at the behaviour of ammonia in water;
NH3(g) + H2O(l) ----> NH4^+(aq) + OH^-(aq)
We can easily see that ammonia accepts a proton from water (this makes it a Brownstd-Lowry base) and the hydroxide ion is formed in the process. Water functions as the proton donor here.
Which of the following is NOT an
example of matter?
a. clouds
b. gasoline
С. ice
d. light
Answer:
Which of the following are not examples of matter, well clouds are matter, gasoline is matter, ice is matter, so it would be light.
PLZ HELP QUICKLY!!!!!!!!
Portfolio: Reflection
Review everything from your portfolio thoughtfully. Answer the following questions carefully and specifically. Use your answers as a guide to prepare for your presentation. Your presentation will focus on your goals and your development and improvements this semester. As you answer these questions, evaluate your strengths as a student. Consider how your growth this semester has prepared you for advancement. Use complete sentences or a paragraph to respond to each item.
WHAT DOES THIS QUESTION MEAN: When you look through your portfolio, what improvements do you notice in your work?
What do they mean by WORK?
Answer:
they meen like what youve learned or like what youve been tonight....all that is work stuff you did for example school work.
Which molecule is butyne?
Answer:
The answer is B.
Explanation:
A P E X
Heptane, pentane and octane are accidentally mixed. They all have different boiling points. Pentane boils at 360 ° C, hexane boils at 690 ° C and octane boils at 12 ° C. What method would you use to separate these liquids? Explain how the method works.
Answer:
Fractional distillation
Explanation:
Heat the mixture upto 700°C
The compuond with low boiling point will evaporate first and the compound with higher boiling point will evaporate last.
CH3CH2CHCH2 + HCl in iupac
Answer:
But-1-ene and Hydrochloric acid
Explanation:
CH3CH2CHCH2
H H H
H - C- C - C = C
H H H
C - Carbon
H - Hydrogen
But-1-ene
H - Cl
H - Hydrogen = 1+ = Hard Acid
Cl - Chlorine = 1- = Hard Base
Hydrochloric acid
Name three group l bases and three group ll bases
Answer:
Group 1: LiOH, NaOH, KOH
Group 2: Ca(OH)2, Sr(OH)2, Ba(OH)2
Explanation:
Crude oil is a miscible mixture of liquids that has many uses . During the refining process it is separes and used to produce aviation fuel diesel fuel and gasoline how should scientists separate crude oil based on its physical properties
Answer:
3 rd point will be the ans
Which shows the correct order of steps in the formation of coal?
Layers of dead plants pile up - plant matter is buried by rocks and dirt - dead plants fall in swamp - plant matter is
compressed and is exposed to heat - coal forms
Plant matter is compressed and is exposed to heat - dead plants fall in swamp - layers of dead plants pile up - plant
matter is buried by rocks and dirt - coal forms
Plant matter is buried by rocks and dirt - dead plants fall in swamp - layers of dead plants pile up - plant matter is
compressed and is exposed to heat - coal forms
Dead plants fall in swamp - layers of dead plants pile up - plant matter is buried by rocks and dirt - plant matter is
compressed and is exposed to heat - coal forms
Answer:
it is Dead plants fall in swamp, Layers of dead plants pile up, Plant matter is buried by rocks and dirt, Plant matter is compressed and is exposed to heat, and Coal forms.
if iam right please make this into brainlest
Help please thanks you
Explanation:
Ok so water is H2O and cabon dioxide in the air is CO2, so the water goes through the carbon dioxide and makes acid rain H2SO4.
Now we have our limestone which is CaCO3.
What happens is that the acid breaks apart our limestone into Ca2+ and CO3 2-. This then reforms into Calcium bicarbonate Ca(CO3)2.
Calcium bicarbonate is soluble in water and is hence washed away by the rain eroding the limestone.
what happens to the grass molecules when it is eaten by the zebra?
Answer:
read below
Explanation:
When the zebra eats grass, it gets energy from the sun that has been stored in the grass. Similarly, the lion obtains energy stored in the zebra. The zebra and lion both obtain the sun's energy indirectly from the energy that the grass obtained through photosynthesis.
Answer/Explanation:
It gets energy from the sun that was inside of the grass.
It happens like this:
Sun gives energy to grass, grass gives energy to zebra.
Sun ---> Grass ---> Zebra
Match the description to the correct term. If the description matches both terms, use
"both" for your answer.
Cause(s) the temperature of
the surroundings to
decrease.
Cause(s) a change in the
temperature of the
surroundings.
Cracking open a cold-pack.
Burning Wood
Absorb(s) energy from the
surroundings.
Cause(s) the temperature of
the surroundings to increase.
Release(s) energy to the
surroundings.
1. Endothermic reaction
2. Exothermic reaction
3. Both
Answer:
Cause(s) the temperature of the surroundings to decrease. - 1. Endothermic reaction.
Cause(s) a change in the temperature of the surroundings. - 3. Both.
Cracking open a cold-pack. - 1. Endothermic reaction.
Burning Wood. - 2. Exothermic reaction.
Absorb(s) energy from the surroundings. - 1. Endothermic reaction.
Cause(s) the temperature of the surroundings to increase. - 2. Exothermic reaction.
Release(s) energy to the surroundings. - 2. Exothermic reaction.
Which two factors contributed to the extinction of many large mammals over the last several million years, including woolly mammoths, saber-toothed cats, and giant ground sloths?
A. loss of habitat and contact with humans
B. loss of habitat and low variation in population
C. low population size and a warming environment
D. a warming environment and contact with humans
Answer:
Explanation:
loss of habitat and contact with humans
Answer:
A
Explanation:
Loss of habitat and contact with humans contributed to the extinction of many large mammals.
why the renewable energy resource you chose is positive
Answer:
Renewable energy require less overall maintenance than generators that use traditional fuel sources. Renewable energy has numerous health and environmental benefits.
Explanation:
hi:)) how to do 5? I’m not sure if it’s hydrogen carbonate or carbonate
Answer:
copper(ll) carbonate
Explanation:
Since the product is a salt which is copper(II) carbonate, water and carbon dioxide, this reaction is an acid + metal carbonate reaction.
Looking at the salt, Cu²⁺ has to be part of the reactants.
Hence, the missing compound there has to be copper(ll) carbonate, CuCO₃.
The balanced chemical equation would be:
CuCO₃ + 2HNO₃➙ Cu(NO₃)₂ +H₂O +CO₂
P.s. You left out CO₂ as a product in Q2 ;)
Just a recap of the main reactions you would've learnt:
1) Acid + base/ alkali ➙ salt + water
2) Acid + metal ➙ salt + hydrogen gas
3) Acid + metal carbonate ➙ salt + H₂O + CO₂
What is the value of log 43? Use the calculator. Round your answer to the nearest tenth.
Answer:
1.6
Explanation:
log 43 = 1.6335
B, 1.6
Explanation: E21
these are easily extracted with a pH solution of greater than 7? which one
A) acid drugs
B) metabolites
C) base drugs
D) derivatives
Answer:
base drugs
Explanation:
The pH scale is a scale graduated from 0-14. It is used as an indicator of the degree of acidity or alkalinity. A pH of 0-6.9 indicates acidity. A pH of 7 indicates that the solution is neutral. A solution of pH above 7 indicates that the substance is basic.
It is thus a correct statement to say that any substance that dissolves in solution to produce a solution of pH greater than 7.0 is a basic substance.
If we look at the options closely, it is only a basic drug that will dissolve in water to yield a basic solution of pH greater than 7.0 hence the answer.
What is the primary difference between a hypothesis and a theory?
Answer: A hypothesis is an explanation for observations. A theory is an explanation for what has been shown many times.
Explanation:
how does the sun rise and set on the spring and fall equinox
Answer:
Actually, the Sun only rises due east and sets due west on 2 days of the year the spring and fall equinoxes! On other days, the Sun rises either north or south of "due east" and sets north or south of "due west." ... At the fall equinox, the Sun rises due east and sets due west.
Explanation:
Sunrise and Sunset - Stanford Solar Center
In the photoelectric effect, what happens when light hits the metal?
A. Electrons are knocked off atoms, causing electricity to flow.
B. Electricity is produced in the metal, causing light to be emitted.
C. Light is reflected off the metal, causing electrons to form.
D. Electrons are pumped into the metal, causing electricity to flow.
Answer: A. Electrons are knocked off atoms, causing electricity to flow.
Explanation:
Photoelectric effect is defined as emission or ejection of electrons from the surface of a metal when a light of certain frequency falls on the surface of the metal. Electrons emitted in this effect can be called photoelectrons.
The light which falls on the surface of the metal must be of sufficiently high frequency called as threshold frequency.
Thus light knocks off the electrons and thus the flow of electrons will result in the production of electricity.
Thus the correct option is Electrons are knocked off atoms, causing electricity to flow.
What is the converse of the conditional statement?
Ifx is even, then x + 1 is odd.
If x is not even, then x + 1 is not odd.
Ifx + 1 is odd, then x is even.
Ifx + 1 is not odd, then x is not even
Ifx is even, then x + 1 is not odd.
Answer:
Conversing the conditional statement is nothing but switching the hypothesis and conclusion. Therefore, the converse of the given conditional statement will be “If x is odd, then x+1 is even.
Explanation:
The converse of the conditional statement is if x is odd, then x+1 is even.
What is conditional statement?A conditional statement is defined as a specific kind of compound sentence that meets the "if...then" requirement. If the hypothesis is correct but the conclusion is untrue, a conditional statement is false. Programming language elements called conditional statements, expressions, or simply conditionals instruct the computer to take specific actions.
Reversing the two statements that make up a categorical or implicational statement yields its opposite. Carry on a discussion is more properly referred to as "converse." Let's say there is a conditional statement of the form "If p then q." If q, then p is the converse. In a symbolic sense, q p is the opposite of p q. The reverse of a conditional assertion is not logically comparable.
Thus, the converse of the conditional statement is if x is odd, then x+1 is even.
To learn more about conditional statement, refer to the link below:
https://brainly.com/question/10714086
#SPJ2
ASAP plz I will give the brainliest
Which type of bond describes the coming
together and sharing of two unpaired outer
electrons, one from each atom?
a. Single covalent bond
b. Double covalent bond
С. Triple covalent bond
d. lonic bond
2nd question
What is the name of this molecule (CO2) that
forms by burning of fuels and is one of the
gases that contributes to global
warming/climate change?
A. Carbon oxygen
B. Carbon and two oxygen
C. Carbon dioxide
D. Carbon oxide
Answer:
Question 1
Which type of bond describes the coming together and sharing of two unpaired outer electrons, one from each atom?
A. Single covalent bond.
Definition of single covalent bond:
A single covalent bond is when only one pair of electrons is shared between atoms.
Question 2
What is the name of this molecule (CO2) that forms by burning of fuels and is one of the gases that contributes to global warming/climate change?
C. Carbon dioxide.
_________ is a jellylike substance within cells.
Answer:
Cytoplasm
Explanation:
Cytoplasm is a jellylike substance within cells.
Answer: he is right
Explanation:
One million argon atoms is how many mol of argon atoms? (2 significant figures)
Answer:
1.66 * 10^-18 mol of Argon
Explanation:
Avogadro says 1 mol of anything has 6.022* 10^23 atoms/particles. Thus using this principle, 1 million argon atoms will have
[tex]1,000,000 atoms Argon * \frac{1mol Argon}{6.022*10^{23} atoms }[/tex]
[tex]1.66*10^{-18} mol \\\\ of Argon[/tex]
One million argon atoms is equivalent to 1.7 × 10⁻¹⁸ moles of argon atoms.
To convert one million (10⁶) argon atoms to moles of argon atoms, we will use Avogadro's number: there are 6.02 × 10²³ argon atoms in 1 mole of argon atoms.
[tex]10^{6} atom \times \frac{1 mol}{6.02 \times 10^{23}atom } = 1.7 \times 10^{-18} mol[/tex]
One million argon atoms is equivalent to 1.7 × 10⁻¹⁸ moles of argon atoms.
You can learn more about Avogadro's number here: https://brainly.com/question/13302703
Can someone please show me how to solve this?
Answer:
4.38 Grams of C
Explanation:
How many grams of C are required to react with 52.6grams of Fe2O2?
Fe2O2 + C = 2Fe + CO2
Ratio 1:1
Fe2O2 = 144 Molar Mass
Fe2O2 52.6/144 = 0.365Moles of Fe2O2
Fe =56grams/mole = Charge 2+, 3+
O = 16grams/mole = Charge 2-
C = 12grams/mole = Charge 4+
So Ratio is 1:1 so we only need 0.365Moles of C so 4.38grams
PLEASE HELP ME ASAP Explain why each of these elements occurs as diatomic molecules. Match the words in the left column to the appropriate blanks in the sentences on the right.
Answer:
The answer to your question is given below
Explanation:
1. When two hydrogen atoms pair together, they form a single bond to achieve complete duet.
Hydrogen atom has 1 shell and 1 valence electron and they contribute it to form bond, thereby obtaining a stable duet configuration
H + H —> H–H —> H2
2. When two halogen atom pair together, they form a single bond to achieve a complete octet which is stable. For example, Cl has 7 electrons in its outermost shell and need 1 more electron to complete it octet. Each Cl will contribute 1 electron each to form a single bond..
Cl + Cl —> Cl–Cl —>Cl2
3. When two oxygen atoms pair together, they form double bond to achieve a complete octet which is a stable configuration.
Oxygen has 6 electrons in its outermost shell and needs 2 more electrons to complete its octet configuration. Each oxygen atom will contribute 2 electrons each to form a double in order to complete it octet configuration.
O + O —> O=O —>O2
4. When two nitrogen atom pair together, they form a triple bond to achieve a complete octet which is stable. Nitrogen has 5 electrons in its outermost shell and needs 3 more electrons to complete it octet configuration. Each nitrogen atom will contribute 3 electrons each to form a triple bond in order to complete its octet configuration.
N + N —> N≡N —> N2.
The explanation as to why each of the elements occurs as diatomic molecules is as follows;
When two hydrogen atoms pair together, they form a single bond to achieve complete duet.Hydrogen atom has only the 1 shell and 1 valence electron and an Hydrogen molecule is formed when the duet is achieved.
H + H —> H–H —> H2When two halogen like Chlorine, Cl (each with a valency of 7) atoms yields a single bond to achieve a complete octet which is stable. Each Cl will contribute 1 electron each to form a single bond..
Cl + Cl —> Cl–Cl —>Cl2Upon bonding of two oxygen atoms, a double bond is formed to achieve a complete octet which is a stable configuration.
Oxygen has a valency of 6 and needs 2 more electrons to complete its octet configuration. Each oxygen atom will contribute 2 electrons each to form a double in order to complete it octet configuration.
O + O —> O=O —>O2When two nitrogen atom pair together, they form a triple bond to achieve a complete octet which is stable.
Nitrogen has a valency of 5 and needs 3 more electrons to assume an octet configuration. Each nitrogen atom will contribute 3 electrons each to form a triple bond in order to complete its octet configuration.
N + N —> N≡N —> N2.Read more;
https://brainly.com/question/14252644
The English system is used as the International System of Measurement. Please select the best answer from the choices provided T F
