Crumpling and tearing cause physical changes to a piece of paper.
Which two characteristics of the paper change?
A. Size
B. Reactivity
I C. Identity
I D. Shape
Please help I’ll give brainlist and no spamming or links just please help
size and shape. only the appearance of the paper will have changed, but is reversible.
Which are included in the inflammatory response? Select three options.painswellingantibodiesmucusredness
A protozoan gains shelter as it lives in the intestine of a termites, helping the termite to be able to digest the wood that it eats. This symbiotic relationship between the termite and protozoan is known as:
Answer:
The ecological relationship between termites and the wood-digesting protozoans that live in their gut is an example of mutualism. Thank you for posting your question here at brainly. I hope the answer will help you.
What is the melting point of water ?
what is the freezing point of water?
Answer:
Freezing point: 32°F or 0°C
Boiling point: 212°F or 100°C
Which environment will probably have the lowest relative humidity?
A) A tropical rain forestincorrect answer
B) A desertincorrect answer
C) Farmlandincorrect answer
D) A swampincorrect answer
Really need this quick i will give 20 pnts
B.
Thank Me Later ;))))))
Desert environment will probably have the lowest relative humidity.
What is relative humidity?Relative humidity is a measure of water vapor content in the air. Desert environment will have the lowest relative humidity due to its high temperature and no availability of water bodies such as river, ocean etc so we can conclude that desert environment will probably have the lowest relative humidity.
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Someone please help with number 9.
Answer:
Its development and progression are usually linked to a series of changes in the activity of cell cycle regulators. For example, inhibitors of the cell cycle keep cells from dividing when conditions aren't right, so too little activity of these inhibitors can promote cancer.
Superficially, the connection between the cell cycle and cancer is obvious: cell cycle machinery controls cell proliferation, and cancer is a disease of inappropriate cell proliferation. Fundamentally, all cancers permit the existence of too many cells.
Explanation:
hope it helps
Question 12 of 35
Which two specialized structures allow amphibians to live on land?
O A. Gills
B. Lungs
C. Legs
D. Tail
SUBMIETI
Answer:
B and C
Explanation:
Most animals that live underwater have have gills and tails and vise versa hope this helps!
koukladina stop deleting my answers I'm trying to help people I'm not doing anything wrong stop it
HELPPPPP ASAP PLSSSS !!!!!!!!!
Answer:
maybe i can help for you where the question
All atoms of an element are______.
Points: 87
Answer:
Alike
Explanation:
What is the relationship between plants soil and fertilizers?
A substance that takes the shape and volume of its container is in this phase is called a liquid
Answer:
liquid matter
Explanation:
Which of the following is a correctly balanced equation? A. NaClO3 → NaCl 3O2 B. 2HgO → 2Hg O2 C. 2ZnS O2 → 2ZnO 2SO2 D. 4CO Fe3O4 → 4CO2 Fe E. 2Fe 2Cl2 → 2FeCl3.
Answer:
yes is the anser
Explanation:
i donyt know how to be wrong
The correctly balanced equation among the options is 2HgO → 2Hg + O2.
BALANCING CHEMICAL EQUATION:Balancing a chemical equation means ensuring that the number of atoms of each element on both sides of the equation are the same in accordance to the law of conservation of mass.
To balance a chemical equation, we make use of coefficients, which are numbers placed in front of the element or compound in the reaction.
According to this question, the following equation: 2HgO → 2Hg + O2, is correctly balanced because the number of atoms of Hg (2) and O (2) are the same on both sides.
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How many total atoms are present in the compound: Mg(OH)_2
Answer:
In the compond Mg(OH)_2, 20 atoms are present.
Explanation:
The very act of you observing something
will disturb the system is known as:
Answer:
The observer effect is the answer.
PLS ANSWER ALL QUESTIONS FOR 67 POINTS
Atomic Structure
1. All atoms are made up of small particles called ____________________.
2. These small particles include the positively charged ________________, the negatively charged _____________ and the neutral ____________.
3. The atomic mass equals the ______________ and the ______________.
4. The atomic number tells you the number of ________________ which is equal to the number of _________ in a stable atom.
5. So, we can use the atomic mass and the atomic number to calculate the total number of just the neutrons. Calculate the number of neutrons in a Carbon atom.
[Picture of carbon]
Total number of neutrons = ________________
6. The lightest sub-atomic particle is the _____________
7. The center of the atom is called the __________
8. The area where the negatively charged particles can be found is called the _________________
9. Each of the charged particles are on what we call ____________ or ______________
a. There are how many on the 1st layer _________
b. On the 2nd layer _________
c. On the 3rd layer _________
d. Electrons on the outer level of any atom have a special name which is _____________________ and these outer electrons determine the atoms reactivity with other elements
Explanation:
1. subatomic particles.
2.proton, electron and neutron
3.The atomic mass of an element is actually the sum of the MASSES of protons and neutrons in AN atom of that element
4.An element's atomic number is equal to the number of protons in the nuclei of any of its atoms
5. Number of Protons = Atomic Number
Number of Electrons = Number of Protons = Atomic Number
Number of Neutrons = Mass Number - Atomic Number
For krypton:
Number of Protons = Atomic Number = 36
Number of Electrons = Number of Protons = Atomic Number = 36
Number of Neutrons = Mass Number - Atomic Number = 84 - 36 = 48
6. electron, lightest stable subatomic particle known. It carries a negative charge of 1.602176634 × 10−19 coulomb, which is considered the basic unit of electric charge. The rest mass of the electron is 9.1093837015 × 10−31 kg
7.The center of the atom is called a nucleus
8. Negatively charged particles are found in multiple layers outside the nucleus of the atom. These particles are called electrons, and they orbit in various energy levels around the atom's nucleus.
9. A charged particle is also called an ion
How do I convert the ones circled in red? Please explain how you did it don’t just do it for me.
Answer:
25 centigrams is equal to 2.5 grams.
150 hectometers are 10,000 centimeters.
Explanation:
10 centigrams is equal to 0.1 gram.
25 / 10 = 2.5
1 hectometer is equal to 10,000 centimeters.
150 x 10,0000 = 1500000
Select all the statements that correctly describe a solution. Multiple select question.
A. A solution is a mixture of substances dissolved in water.
B. A solution may have more than one solute.
C. Not all solutions are liquid.
D. A solution is a homogeneous mixture of two or more substances.
E. The solute is the substance present in the largest quantity.
Answer:
B, D, C
Explanation:
the solution may have more than one solute, a solution is a homogenous mixture of 2 or more substances and not all solutions are liquid
A solution is formed by the mixture of substances dissolved in water. There may have more than one solute. Not all solutions are liquid but there exists solid solutions too. Hence, options A, B, C are correct.
What are solutions?A solution is a combination of a solvent and a solid solute. The solute can be completely dissolved in the solvent and can have a partial solubility.
Water is a good solvent which dissolve majority of compounds. But there are other solvents too forming solution with suitable solutes. Solutions can be homogenous or heterogenous. Homogenous solutions are forming one phase and the solute particles are uniformly arranged.
Heterogeneous solutions are those where the solute particles are arranged in a non-uniformity and they form a different phase from the solvent.
There can be more than one solute in a solution provided that the solute can be of miscibility with each other.
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What is the formula for this compound?
1 atom of copper, 1 atom of sulfur, 4 atoms of oxygen
Answer:
The third one: [tex]CuSO_4[/tex]
Explanation:
Again you are going to want to look at a periodic table so you can determine the symbol of each atom.
The symbol for copper is Cu, the symbol for sulfur is S and the symbol for Oxygen.
There is 1 atom of copper in the compound
So we have Cu
There is 1 atom of sulfur in the compound
So we would have CuS
There are 4 atoms of oxygen in the compound
So we would have [tex]CuSO_4[/tex]
Note that the little number at the bottom left after each symbol indicates how many atoms of that element are in that compound.
250 mL of argon gas is held in a flexible vessel shown above. If
the pressure changes to 12.0 atm, what is the new volume of
the gas at 20°C?
The new volume of the gas at 20 °C is 205 mL
From the question given above, the following data were obtained:
Initial volume (V₁) = 250 mL Initial pressure (P₁) = 10 atmInitial temperature (T₁) = 25 °C = 25 + 273 = 298 KNew pressure (P₂) = 12 atmNew temperature (T₂) = 20 °C = 20 + 273 = 293 KNew volume (V₂) =?With the application of the combine gas equation, we can obtain the new volume of the gas as illustrated below:
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2} \\ \\ \frac{10 \times 250}{298} = \frac{12 \times V_2}{293} \\ \\ \frac{2500}{298} = \frac{12 \times V_2}{293} \\ \\ cross \: multiply \\ \\ 298 \times 12 \times V_2 = 2500 \times 293 \\ \\ divide \: both \: side \: by \: 298 \times 12 \\ \\ V_2 = \frac{2500 \times 293}{298 \times 12} \\ \\ V_2 = 205 \: mL \\ [/tex]
Therefore, the new volume of the gas is 205 mL
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The new volume of the gas at the given pressure and temperature is 205 mL.
The given parameters:
Initial volume of argon, V₁ = 250 mLInitial pressure of gas, P₁ = 10 atmFinal pressure of the gas, P₂ = 12 atmInitial temperature of the gas, T₁ = 25 ⁰C = 273 + 25 = 298 KFinal temperature of the gas, T₂ = 20 ⁰C = 273 + 20 = 293 KThe new volume of the gas is calculated by applying general gas equation as follows;
[tex]\frac{V_1 P_1}{T_1} = \frac{V_2P_2}{T_2} \\\\V_2 = \frac{V_1P_1 T_2}{T_1P_2} \\\\V_2 = \frac{(250\ mL) \times 10 \times 293}{298 \times 12} \\\\V_2 = 204.84 \ mL\\\\v_2 = 205 \ mL[/tex]
Thus, the new volume of the gas at the given pressure and temperature is 205 mL.
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What is the excess reactant of water?
Answer:
Hydrogen
Explanation:
An example of this can be In this example, hydrogen is the limiting reagent and oxygen is the excess reagent. The amount of product formed is limited by the amount of hydrogen.
Calcolate resulant force 15N <-[]->20N
Explanation:
5N right because -15N for left plus +20N for right = +5N
Which of the following outcomes is a benefit of conventional agriculture?
Answer:
Preserving soil, water and energy resources has enabled modern farming to grow food sustainably on the same land for more than 100 years. ... Modern, conventional agriculture has key sustainability benefits in terms of land use, reduced soil erosion and water protection.
Explanation:
hope it helps you
2. Transfer in energy to reach the highest amount of kinetic energy for both substance B and C.
3. Slowly transfer out energy from each substance. Note the temperature at which each substance changes phase.
Substance B changed to a liquid at
ANSWER: °C.
Substance C changed to a liquid at
ANSWER: °C.
For Science please answer the questions with the word "ANSWER"
4. Based on your observations above, which substance needed a greater decrease in kinetic energy in order to change phase?
The substance with
(medium or low) ANSWER: Pick which one it is!
attraction needed more energy transferred out in order to change phase.
The change in phase of a substance is called a physical change. The substance C with low molecular attraction needs more energy transferred out and thus its kinetic energy have to be decreased to change from gas to liquid.
What is energy transfer?Energy can neither be created nor be destroyed. However it can be transferred from one form to the other and thus total energy of a system is conserved.
In gaseous state molecules or atoms are far apart and have minimum intermolecular forces of attraction whereas in liquid state they have medium molecular attraction and are a bit close than they are in gas state.
When a substance changes from gas state to liquid state its molecules condenses and becomes more close to each other forming higher molecular attraction.
The gas B have medium molecular attraction and thus will easily liquified with minimum energy transfer whereas, gas C is of less molecular attraction having higher kinetic energy and thus more have to transfer more energy out to liquify.
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Can someone help me with this please
That is an ionic bond.
Explanation:
It has cations and anions
If a 425 gram sample of Uranium-235 had a half-life of 8 days, how much of the sample would remain after 16 days?
type your answer
grams
How do vascular plants get the water and minerals they need to live?
through de' la' dasini
Consider the substances quartz (SiOs), gold (Au), and nitrogen gas (N2). If possible, use the terms
molecule and compound to describe each substance. If one or more of the substances cannot be
described by the terms molecule and compound, explain why not.
Answer:
Silicon Dioxide is a compound usually referred to as Quartz, it's a crystalline sort of material that is commonly found and used for equipment and furniture (like tables for example). Their molecular geometry is of tetrahedral shape (how their bonds look like and such)
Gold is an element that is a transitional metal that is quite malleable (able to hammer it to sheets) and is ductile (can be made into wires). As you probably have guessed, gold is used a lot for jewelry due to its lustrous appearance, and the fact that it can't corrode as well as its rarity. Due to it not being able to corrode, it's pretty useful in circuitry as it requires less management unlike elements with higher electrical conductivity like copper or silver. However gold is pretty costly so it's not often relied on for technology and mostly just used for show instead.
N2 or nitrogen gas, may seem like a compound for people new to chemistry but is actually just a diatomic molecule, meaning they are composed of only 2 atoms. So elements that are diatomic are commonly found with only 2 atoms (Oxygen gas for example, or Hydrogen gas) Nitrogen is part of the "magnificent seven" (the elements which are diatomic". Nitrogen is essential for a lot of living things (aside from us), and since they are the most abundant material in our air (78% of air is Nitrogen), there's plenty of life growing.
Compound and elements are differ from each other. Silicon dioxide ( SiO₂ ) is compound , gold ( Au ) is element and nitrogen gas ( N₂ ) is compound.
What is difference between molecule and elements ?Elements are always made-up of only one type of atom. Molecule is made up of more than one type of atom. Silicon dioxide is a compound, which is crystalline in nature. Their molecular geometry is of tetrahedral shape.
Gold is an element that is a transitional metal that is quite malleable and is ductile. Gold ( Au ) is used a lot for jewelry. Nitrogen gas is compound . It is diatomic in nature, So elements that are diatomic are commonly found with only 2 atoms.
Hence, silicon dioxide is compound, gold is element, and nitrogen gas is also compound.
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1. Why are the world’s rainforests so important?
2. Predict solutions for slowing the loss of biodiversity.
3. Describe three ways humans are contributing to the loss of biodiversity.
4. How does the introduction of invasive, non-native species, threaten biodiversity?
Answer:
1.
Rainforests are important due to the amount of oxygen the tree's produce. It also adds biodiversity and more balance in the food chain of animals.
2.
If we slowed transportation and agricultural farming, greenhouse gases and carbon monoxide would be reduced magnificently.
3.
One way is that Humans are supplying demand for animal agriculture for food (when not need to). The greenhouse gases created by the factories alone are creating much of the ozone's destruction. Also, another reaction to demand of meat is, The space needed for farmland. They burn down much of the rainforest for farmland and grass for the cows and other animals. Thirdly, traveling alone and having many household luxuries aren't helping either. Lowering the use of composite resources and more wind, solar, and water energy can help the earth in total.
4.
Introducing invasive species endangers many of the other species. They could have a advantage or disadvantage over the other species. causing either over, or under, population for many of the species. Throwing the balance of it all off.
what are isotopes and explain why
10. 11. What is a crystal?
Answer:
there aren't any choices on the question so here's the closest i can give. A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure
Answer:
Definition of crystal :- A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. Example of crystal :-large crystals include snowflakes, diamonds, and table salt.Meaning of crystal :-.
A piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces. Ex:- "A quartz crystal".Highly transparent glass with a high refractive index. ex :- "A crystal chandelier"