Answer:
There are several theories to explain the difference between an acid and a base. One of the most complete theories is Lewis's theory, because it encompasses several compounds that other theories do not include. According to Lewis's theory, an acid is a substance capable of accepting a pair of electrons. And Lewis bases are substances that have the ability to donate a pair of electrons.
An example of an Lewis acid-base reaction is ammonia and boron trifluoride:
BF3 (is the acid) + NH3 (is the base) → H3N - BF3
Some differences of acids and bases to the touch are:
• Acids are sour in taste while Bases are bitter in taste. This is due to the pH that indicates acidity or basicity, and is defined as the hydrogen potential of a solution. The pH indicates the concentration of hydrogen ions in a substance. Substances with pH less than 7 are considered acidic, while substances with a pH greater than 7 are considered as bases (alkaline).
• Acids are highly corrosive, and can cause chemical burns to the skin, or respiratory damage when inhaling their gases. An example is sulfuric acid (H2SO4), which can corrode steel. The bases instead have a feeling of soap or slippery to the touch.
• Acids react with metals to produce compound and hydrogen gas while bases do not react with metals. For example, copper is attacked by nitric acid by reaction:
Cu(s) + 4HNO3(aq) ⇒ Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)
• Acids turn blue litmus paper into red whereas in case of Bases they turn red litmus paper into blue.
• The bases are irritating to the skin, as they dissolve the skin fat, and can destroy organic matter by its caustic effect. An example is Sodium Hydroxide (NaOH)
• Acid and bases are good conductors of electricity in aqueous solutions.
Explanation:
HOPE THIS HELPS
Answer:
Acids can burn your skin when touched because acids are highly corrosive, whereas bases are slimy and have a slippery feel. An example of an acid is citric acid, which can be used as a disinfectant or in foods and candies as a flavor enhancer. Bleach is an example of a base and is used for cleaning and has whitening properties.
Explanation:
thought i'd give a shorter version, i might be wrong tho
1. A compound is a substance made up of only 1 kind of element.
True
False
2. An element is a substance _______ be broken down or separated into simpler substances
can
cannot
Answer:
1. False
2.cannot
Explanation:
What is the structure labeled with an arrow?
A. Cytoplasm
B. Nucleus
C. Cell wall
D. Flagellum
In the given diagram, the structure labeled with an arrow is the nucleus. Therefore, option (B) is correct.
What is the nucleus of a cell?The nucleus is the most integral component of the cell. A nucleus can be defined as a double-membraned eukaryotic cell organelle that consists of genetic material.
The nucleus is typically the most evident organelle in the cell. The nucleus is entirely bound by membranes and is surrounded by the nuclear envelope.
The contents of the nucleus distinguish from the cytoplasm by the membrane. The nucleus contains hereditary information about the cell and controls its growth and reproduction.
The nucleus is not just a storage section for DNA but also occurs to be the home of cellular processes. In the nucleus, DNA can be duplicated and the process is named as named DNA Replication and produce an identical copy of the DNA.
In the diagram, the arrow indicates the nucleus.
Learn more about the nucleus, here:
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Sonya is playing a board game, and each space on the board game measures 1 centimeter. She moves her game token 5 spaces up from the start position. Then she moves it 5 spaces to the left. Finally, Sonya moves her token 2 spaces down.
What is the total distance the token moved?
A. 2 cm
B. 8 cm
C. 12 cm
D. 15 cm
Answer:
12 centimeters
Explanation:
as 5+5+2= 12
What is true of a reaction that has reached equilibrium?
The reaction rate is zero.
The reaction rates of the forward and reverse reactions are equal.
The rate of the forward reaction is greater than the rate of the reverse reaction.
The rate of the forward reaction is less than the rate of the reverse reaction.
Select the correct responses to the questions from the drop-down menus.
Which wind blows cool air inland during the day? _______
Which wind blows cool air toward the sea at night? _______
Which winds blow steadily from specific directions and over long distances? _________
Answer: hot air
hot air
cool air
Explanation:
The wind blows cool air inland during the day is sea breeze.
The wind blows cool air toward the sea at night is land breeze.
The winds blow steadily from specific directions and over long distances are global winds.
What are the global winds ?The term global wind is defined as winds that occur in belts that go all around the planet. Earth is hottest at the Equator and gets cooler toward the poles.
Global winds are winds that blow steadily from specific directions over long distances. Warm air rises at the equator and sinks at the poles, causing winds to blow from the poles to the equator at the earth's surface.
In a sea breeze the cold air travel from sea towards land during daytime and in a land breeze the cold air travel from land towards sea during night time.
Thus, The winds blow steadily from specific directions and over long distances are global winds.
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HOW FAST CAN YOU ANSWER {NEW}}}}}}
if i’m thinking correctly it should be D
5 Which of the following scenarios best describes Newton's law of action-reaction?
A A bottle of soda sitting in the console of a vehicle appears to move left as the vehicle makes a sharp right turn.
B A rocket moves upward as the engine pushes downward against exhaust gases and the exhaust gases push upward against the engine.
C A train traveling 88 kilometers per hour takes approximately one kilometer to come to a complete stop.
D An ice skater sharpens the blades of her skate to lessen the effect of friction.
Answer:
c?
Explanation:
b or c im dumb tho so they could be
magnesium reacts with oxygen and forms magnesium oxide , for example
Answer: When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide, which is a compound. ... After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product. This is an exothermic reaction.
Which statement best describes the weather shown by the blue triangles going one way and the red semicircles going the other way on a line on a weather map?
A stationary front may produce rainy or snowy weather for several days.
A cold front can cause heavy rain, thunder, and lightning.
An occluded front can cause light to heavy precipitation that may last several days.
A warm front brings drizzly weather.
What is your "Resting Heart Rate" for 1 minute?
Answer:
A normal resting heart rate for adults ranges from 60 to 100 beats per minute.
What atoms make up one molecule of water?
A. 2 Hydrogen, 1 oxygen
B. 3 Hydrogen, 1 oxygen
C. 1 Hydrogen, 1 oxygen
Answer:
A
Explanation:
Answer:
A
Explanation:
2 Hydrogen and 1 Oxygene atoms :D
Which of the following types of carbon fixation is least common for plants in arid locations?
a.
C3
b.
C4
c.
CAM
d.
none of the above
Answer:
A C3
Explanation:
Can somebody help me with my Abiotic vs. Biotic Knowledge Check?
Answer:
abiotic and biotic check
Explanation:
Abiotic is something that is not living
Ex:air
Biotic is something that is living
EX :Plants
Evaluate Questions To narrow down the location for a new development, a construction company gets several plots of land assessed. They study the soil type, shape of the land, and vegetation. How would you evaluate their assessment? Explain how to improve it.
Interpret Data Hill X experiences a slump after being hit by a hurricane. Hill Y in the same town experiences the same storm and has a steeper slope, but does not have mass movement. Why did Hill X experience the mass movement, while Hill Y did not? Explain your answer.
Hill X experience mass movement, while Hill Y did not because hill Y experience the eye of the hurricane while Hill X experienced another part of the hurricane.
A.Which non-metal is essential for our life and all living beings inhale it during breathing?
B.Whichnon-metal is used to disinfect water?
2.A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.
Give reasons for the following.
(a)Aluminium foils are used to wrap food items.
(b)Immersion rods for heating liquids are made up of metallic substances.
(c)Sodium and potassium are stored in kerosene.
4. What is the nature (acidic or basic )of the following oxides ?a.Magnesium oxide (b) Sulphur dioxideGive reason foryour choice.
5. When a copper metal is exposed to moist air for a long time,then a green coating is formed on its surface .What is the green material formed on its surface. Support your answer with word equation.Is it acidic or basic in nature.
PLEASE HELP ME !!!!
Answer:
A. oxygen
B. chlorine
2. iodine
(a) because aluminium is a soft malleable metal. it can be made to in sheets to form thin wrapping sheets. also, it does not react with food items.
(b) because metals are good conductors of heat and electricity. the immersion rod needs electric supply to get heated and to heat liquids.
(c) they're kept in kerosene to keep them from coming in contact with oxygen and moisture as they react to form their hydroxides.
4. Magnesium is a metal. Metals react with oxygen to form metallic oxides. So Magnesium oxides are basic in nature. But nonmetals react with oxygen to form nonmetallic oxides. These oxides differ from metallic oxides because they are acidic in nature. Nonmetallic oxides react with water to form acids. Therefore, Sulphur dioxide is acidic in nature. Magnesium oxide is basic in nature.
5. Copper forms a green deposit on its surface when exposed to air which is usually a mixture of copper carbonate and copper hydroxide. It's acidic in nature.
Answer:
2.A
Explanation:
7. the answer is not D
Answer:
B
Explanation:
The others are written in the correct format and the question is asking which is not written in the correct format.
Explain how this chemical equation H2+Cl2=2HCl shows The Law of Conservation of matter
H2+Cl2=2HCl shows The Law of Conservation of matter
I will leave a link so you can perform the test! (I have to space it out because brainly doesn't like links) Please answer within the next 45 minutes! !! IF YOU DON'T KNOW, DON'T ANSWER. IF YOU ANSWER WITHOUT KNOWING YOUR ACCOUNT CAN GET BANNED !! (It's happened to me before)
www. glencoe. com/sites/ common_ assets/science /virtual_ labs/E04 /E04.html
Answer:
Question 5: The sequence needs to be completed or nothing will happen.
Question 4: A food chain is a sequence of organisms that are connected by their feeding and productivity relationships; a food web is the interconnected set of many food chains. Energy transfer is a one-way process.
Question 3: Heat to molecular motion to mechanical energy to electrical energy
Question 2: Frictional energy
Question 1: Chemical energy is transformed into electrical energy and then into light energy
Explanation:
hope this helps!
Which object will have particles with the highest average kinetic energy?
Answer:
Explanation:
B AND D
Usable forms of nitrogen can intentionally be increased in the soil by(1 point)
lightning.
planting more trees.
allowing organic matter to decompose.
planting fewer beans.
Usable forms of nitrogen can intentionally be increased in the soil by allowing organic matter to decompose. Therefore, option C is correct.
What is organic matter ?Organic matter is defined as anything that contains carbon compounds formed by living organisms. It includes lawn clippings, leaves, stems, branches, moss, algae, lichens, animal parts, manure, droppings, sewage sludge, sawdust, insects, earthworms, and microbes.
The majority of organic matter in soil comes from plant tissue. Plant residues have a moisture content of 60-90 percent. Carbon (C), oxygen, hydrogen (H), and trace amounts of sulphur (S), nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium make up the remaining dry matter (Mg).
Microorganisms such as bacteria, viruses, fungi, protozoa, and algae are among the living components of soil organic matter. Plant roots, insects, earthworms, and larger animals such as moles, mice, and rabbits are also included.
Thus, option C is correct.
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Answer numbers 1-8
(Don't answer if you don't know)
Party mix is an example of a mixture.
Question 1 options:
True
False
Answer:
false i think plz give me brainliest
Explanation:
Answer:
true
Explanation:
because it has different kids of snacks in it like a fruit bowl it has grapes pineapples apples bananas just different kinds of foods so yes it is true
This question has two parts btw
The first question is Explain which example will have the greater reaction rate.
The second question is: Which factor is affecting the reaction rate?
Answer:
the cold one is going to have a faster reaction time
Explanation:
Carbon fixation occurs during the light reactions.
Please select the best answer from the choices provided
T
F
Answer:
True
Explanation:
Carbon fixation is the process by which inorganic carbon is added to an organic molecule. Carbon fixation occurs during the light independent reaction of photosynthesis and is the first step in the C3 or Calvin Cycle.
Answer:
False
Explanation:
What is relative mass of an atom
Answer:
Explanation:
The relative atomic mass of an element is a weighted average of the masses of the atoms of the isotopes - because if there is much more of one isotope then that will influence the average mass much more than the less abundant isotope will.
How do large storms and strong currents affect the coasts?
Storms and currents bring in warm weather in the coast.
Storms and currents can bring in sediments from other places.
Storms and currents attract animals to live by the coast.
Storms and currents are necessary to produce seashells.
HELPPP
ctrl c this than ctrl v it in a serch bar its a fun game :) http://agar.rip/play/ this is to https://evoworld.io/play?loc=EU
A student asks a class the following question, “Polyethylene has a relatively short formula (C2H4) while nylon has a long formula (C12H22N2O2). However, in a toothbrush, the handle is relatively long while the bristles are relatively short. How is this possible?”
Choose the explanation below that best responds to the student’s question.
A
Molecules are so small that they cannot be seen with a naked eye. Therefore, being a slightly bigger molecule on that scale will not influence how big the part of the toothbrush is.
B
In a toothbrush, the polyethylene chain is most likely a longer chain of molecules than the nylon chain, making the handle longer than the bristles.
C
Polyethylene is used for the bristles and nylon is used for the handle, because the size of the molecule does determine the size of the object being built by the molecules.
D
Polyethylene has a short formula, but it makes a long chain. Nylon has a long formula, but it is fat, not long. That is why the nylon bristles are short while the handle is long and thin.
Answer:
its A, im not 100% sure but i think it is A by like 90%
Please help! I'm trying to catch up on Science and I have 10+ assignments to do plus quizzes!!!
Answer:
Cohesion describes water's attraction to other water molecules
Can you help, please?
(When you answer, but the letter then the number, for example, H,8)
How do the circulatory, respiratory or digestive system, and how they work together.
Please answer in two paragraphs.
