Answer:
B
Explanation:
She is unsure of which soil would allow the flowers to grow best so the soil that allows the flower to grow the most is the best soil.
Answer:
B. which soil type allows the flower to grow the most?
PLEASE ANSWER IF ITS CORRECT I WILL MARK IT AS BRAINLIEST PLZ??
What do you think would happen if the temperature of a gas is higher than the other when applying Graham's Law? *
A) There will be no effect on the gas
B) The kinetic energy of the gas particles would increase
C) The volume of the gas particles would increase
Answer:
There will not be effect on the gas
Explanation:
I'm sure that it's correct answer
Why can't krypton and xenon separate during the separation of gases in the air?
Answer:
The remaining gas is a mixture of argon, neon, krypton, and xenon. Because these elements are chemically very unreactive, chemical means cannot be used to separate them.
Explanation:
Answer:
They're in Group 0 as they have full outer shells meaning they are chemically unreactive as they already have full outer shells meaning they don't want to lose or gain any electrons. Thus, they can't separate during the separation of gases in the air.
1.
what can noble gases be used for?
2.
what is a vertical column called in the periodic table
3.
what is the horizontal column in the periodic table
Answer:
1. They are mostly used to protect materials and prevent chemical reactions.
2.These are Groups
3. I guess it is Rows
Electrons can occur only in specific
Answer: Electrons have wavelike motion and are restricted to certain energy states associated with specific wavelengths.
5. Name three different waves you use on a daily basis, Explain how you use them
Answer:
We use radio waves for communicating or a for television and radio. We use Heat waves to heat things. We uses heat waves everyday for heat up food in the microwave and drying clothing when using the dryer or when drying our hair with a hairdryer. Infrared light is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark.
Hopefully, it helps :) Give me brainiest please!
What’s the answer for this question
Answer:
i think it's B
Explanation:
6. Which change to a population would cause
increased competition among
its members?
SC.7.L.17.3
ES
an increase in population size
B a decrease in population size
© an increase in predation on the
population
D an increase of disease in the population
Answer:
B
Explanation:
Because I said so
How many moles of potassium are needed to react completely with 7.50 mol of chromium (III) oxide? Show work.
Answer:
45 mol
Explanation:
First you need to balance the equation:
6K + Cr2O3 = 3K2O + 2Cr
the proportion of the coeficients of potassium and chromium oxide is 6 to 1 so we need to multiply 7.5 by 6 to get 45.
what is chemical composition of the atmosphere
Answer:
nitrogen 78%, Oxygen 21%, Argon 0.9%, Carbon dioxide 0.03%, water 0-4%(depends)
Explanation:
Answer:
definition: The atmosphere is composed of a mix of several different gases in differing amounts. The permanent gases whose percentages do not change from day to day are nitrogen, oxygen and argon. Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%.
Explanation:
Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are trace gases that account for about a tenth of one percent of the atmosphere.
Layers of the atmosphere:
- From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere
I need help in this questions
Answer:
just use calculator mannn
Label each process as a physical or chemical change and state how you know.
fogging a mirror with your breath
breaking a bone
mending a broken bone
burning paper
slicing potatoes for fries
mixing sugar with coffee
frying chicken
a nail rusting
paper ripping
wood burning
mixing water and food coloring
food molding (rotting)
writing on paper
dyeing fabric
Fogging a mirror with your breath is a physical change because it involves a phase change of water vapor condensing and adsorbing to the mirror surface. Phase changes are physical changes.
Breaking a bone is a physical change insofar as we're focusing on the "breaking" part.
Mending a broken bone, however, is a different story. Bones are living things: They consist of tissues that in turn consist of cells. The actual mending process involves some very complicated biochemistry. Suffice it to say that mending a broken bone would be a chemical change.
Burning paper is a chemical change. Burning anything implies combustion, which is a chemical reaction where some fuel is oxidized (usually by oxygen gas, producing carbon dioxide gas and water vapor).
Slicing potatoes for fries is a physical change. You can slice, dice, smash, mash, stretch, bend, compress, or grind a potato: What you will have is still a potato (okay, there are some chemical changes going on as you're rupturing cells in the process, causing them to release their contents which may participate in chemical reactions). But the key, again, is that cutting up some material doesn't fundamentally change the chemical identity of that material.
Mixing sugar with coffee actually involves two physical processes: the mixing and the (presumed) solvation of the solid sugar particles as they dissolve into the coffee. In either case, either mixing or dissolving would be a physical change. The sugar molecules are still in the coffee and are chemically unchanged.
Frying chicken is a chemical change. In fact, frying chicken likely entails several different types of chemical changes. The common thread among them is that frying involves breaking chemical bonds in and on the chicken by the addition of thermal energy, and new chemical bonds end up being formed. That's the hallmark of a chemical change.
A nail rusting is a chemical change. Rusting is an electrochemical process; the familiar corrosion of iron into rust is, at bottom, a chemical reaction where iron reacts with oxygen to form iron oxides (often catalyzed by the presence of water and salts).
A paper ripping is analogous to slicing potatoes: it's a physical change. If you ripped one sheet of paper into two halves, each half would retain all the chemical properties of the original sheet.
Likewise, wood burning is analogous to burning paper, and as such is a chemical change. Again, combustion is a chemical process.
As we said earlier with sugar in coffee, mixing in itself is a physical process. While it may seem like you've permanently changed the nature of the water by dyeing it with food coloring, the molecules comprising the food coloring are simply dispersed within the vast sea of water molecules. There are no intramolecular bonds that are broken or formed; the chemical identities of all the substances here are preserved. So, this is a physical change.
Food molding (rotting) is a chemical change. Rotting is biochemical decomposition: the chemical bonds that make up the food are broken down by enzymes released by the mold.
Writing on paper, whether it be with a pen, pencil, crayon, or marker, is a physical change. The molecules from the writing instrument are physically stuck to the paper. But unless you're writing on paper by, say, burning letters onto it, there are no chemical changes occurring when the writing instrument meets the paper.
As with writing on paper, dyeing fabric can be a physical change. The dye consists of molecules that interact with light in a way that we perceive a certain color. When dyeing fabric, these molecules are transferred and fixed into the fabric by adsorption, absorption, and other intermolecular phenomena. But the molecules of the dye (and the molecules in the fabric) don't experience any breaking and forming of bonds. All of the substances involved retain their chemical identities.
However, it's possible that, depending on the dye, there may be chemical changes involved. Some dyes, appropriate named "reactive dyes," undergo chemical reactions with their substrate (which, in this case, would be the fabric), or dyes may be used that undergo chemical reactions with one another, both of which would constitute chemical changes. And it can depend on what you mean by "dyeing": Bleaching a colored shirt can technically be conceived of as "dyeing" the shirt white, and this process involves cleavage of bonds within the color-producing molecules in the fabric by reacting with the molecules in the bleach.
So, for dyeing fabric, it can be a physical or chemical change depending on the dye.
When a gas is heated, the gas particles have more kinetic energy. Complete the following sentence: This means they move about more and have more ______ with the sides of the container. This increases the pressure.
Answer:
Contact
Explanation:
As the speed of the particles increases, they move around more, which means they hit the sides of the container more.
R4te me for 10 points and be honest with me PLEASE
Answer:
id give you and 8 or 9 but you are really pretty tho
Explanation:
two oxides, X and Y are added seperately to dilute sulfuric acid and dilute sodium hydroxide. X reacts with dilute sulfuric acid but Y does not react. Y reacts with aqueous sodium hydroxide but X does not react. which type of oxide are X and Y ?
Answer:
c
Explanation:
x basic and metallic while y is acidic
The study of chemicals is called chemistry.
The correct answer is B.
The compound which has oxygen in it is called oxide. According to the question, the element is react with the acid and base.
The X only reacts with the acidic compound but not basic compound hence the element X is basic in nature. while Y only reacts with the basic compound, not X, hence the Y element is acidic in nature.
Therefore, the correct answer is B.
For more information, refer to the link:-
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Elaborate on the nuclear model of the atom. The nuclear model describes the atom as protons and neutrons distributed throughout a sea of electrons. The nuclear model describes the atom as electrons uniformly scattered in a positive cloud of protons. Eliminate The nuclear model describes the atom as a small, negative center enveloped by a cloud of positive particles. The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.
Answer:
D.) The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.
Answer
The nuclear model describes the atom as a dense, positive nucleus surrounded by a cloud of negative electrons.
How many atoms are in 4.25 g of Ag?
Group of answer choices
2.76 x 10^26 atoms
2.37 x 10^23 atoms
2.76 x 10^23 atoms
2.37 x 10^22 atoms
Explain how the use of fossil fuels can cause lakes and ponds to become more acidic.
Answer:
Explained below
Explanation:
Fossil fuels which are made up of coal and oil when burnt by power-production industries, make sulfur to be released into the atmosphere where it combines with oxygen to form SO2 (sulfur Dioxide). Now, the exhausts possessed by cars could also cause the formation of nitrogen oxides in the atmosphere. Therefore, H2SO4 which is airborne sulfuric acid and HNO3 which is nitric acid can be formed and when dissolved in the water vapor in the atmosphere form what is called acid rain.
Now, as acid rain flows through the soil, it can leach aluminum from the soil clay particles and then flow into the lakes to make them more acidic.
1. Which type of matter has the molecules packed closer together?
a. Solid
b. Liquid
c. Gas
d. Plasma
2. Matter is made up of __________.
a. Molecules
b. Particles
c. Atom
d. All of them
3. Particles with more energy move ________ than particles with less
energy.
a. Slower and closer together
b. Slower and farther apart
c. Faster and farther apart
d. Faster and closer together
4. Which best describes the particles in a liquid?
a. More freely moving than a gas
b. More freely moving than a
solid
c. Less freely moving than a
solid
d. Completely unmoving
5. Which of the following statements describes a mass?
a. The force of attraction between two bodies.
b. The force of gravity exerts on a body of mass.
c. The amount of matter in an object.
d. The weight of the object from place to place.
Answer:
1. Which type of matter has the molecules packed closer together?
a. Solid
2. Matter is made up of _________.
d. All of them
3. Particles with more energy move ________ than particles with less
energy.
c. Faster and farther apart
4. Which best describes the particles in a liquid?
b. More freely moving than a solid
5. Which of the following statements describes a mass?
c. The amount of matter in an object.
An example of a binary compound is
a.
potassium chloride
b.
ammonium chloride
potassium chlorate
ammonium chlorate
Answer:
a. KCl
Explanation:
a. KCl - made of 2 elements
b. NH4Cl
c. KClO3
d. NH4ClO3
An atom that has lost one or more electrons is a(n) _____.
Not Cation
Answer:
ion
Explanation:
that is the definition according to g o o g l e:
"an atom or molecule with a net electric charge due to the loss or gain of one or more electrons."
Answer:
An ION
Explanation:
Because a positive ion is called a CATION and a negative ion is called an ANION (Please brainlist me)
hey y’all, I’m growing a plant for science class but I need some questions about the plant, can someone please give me atleast 3 questions to answer for it.. can you give me atleast one tricky one
Hurry pls <3
Answer:
What type of plant
Where is it mainly found
What are some facts about it?
Balance the equation Ag2O ->Ag + O2
Answer:
For balancing this equation
we need to put
Ag2O. = 2
Ag = 4
O2 = 1
Hope it will help
The balanced chemical equation of decomposition of silver oxide is 2 Ag₂O -> 4 Ag + O₂.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
Learn more about chemical equation,here:
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3. How many grams of water will be produced from 15.0 grams of Methane? *
CH4 +2 02 → CO2 + 2H2O
True/False. A program is an algorithm that has been coded into something that can be run by a machine. *
Answer:
true
Explanation:
well i just had a major PTSD attack how is everyone i need to think about something else
Answer:
Oh so so sorry about that. and thanks for caring for us. anyway we are good wbu
Explanation:
im good. i just ate applesauce lol :)
What is the main process by which water moves from land to the atmosphere?
Answer:
isn't that evaporation if not you can just delete my answer-
Explanation:
What is it about the structure of magnesium atoms that makes them react more slowly than sodium atoms?
Answer:
A reactive metal has the ability to easily lose an electron and acquire a positive charge. Sodium easily loses electrons and acquires a positive charge. Sodium easily lose electrons than magnesium and get oxidized to easily.
Explanation:
what’s the difference between 2o and o(subscript 2)?
Answer:
2O is an atom while O2 Is a molecule
b Explain what would have happened if Jilly
had thrown the object with more force.
Answer:
force had thrown the object with more
Answer:
If an object is in motion and more force is applied to it, the object will begin moving faster
Explanation:
don't have any (sorry:[ )
Why does oxygen have a higher electronegativity compared to chlorine?
Answer:
The electronegativity of fluorine compare to the electronegativity of oxygen and chlorine as below
Explanation:
Fluorine has the highest electronegativity than oxygen, and chlorine.
Explanation
Generally the electronegativity increase across the period ( from the left to the right) and decreases down the group.
Both oxygen and fluorine are in period 2 in periodic table. since fluorine is on fur right side as compared to oxygen , fluorine has higher electronegativity than oxygen.
On the other side Fluorine and chlorine are in the same group in periodic table. fluorine is at the top of the group while chlorine is at the bottom therefore fluorine has higher electronegativity than chlorine.