Answer:
Earthquakes and Volcanos?
Explanation:
I'm a little unsure about my answer, however, I do have some insight backing my answer. Earthquakes happen when the plate tectonics shift into each other, causing them to collide. Then for volcanos, the plate tectonics shift from convection current and molten rock from the mantle come to the surface.
A marine fossil found in a desert indicates that the area had once been water. I have to type this answer
Answer:
whats the question
Explanation:
When you listen to the voices while in the room, they sound different than listening to them through the wall.
Why do the voices sound different when you listen to them through the wall?
Question 11 options:
Sound waves change frequency over long distances
Sound waves do not pass through solid materials
Your ear processes sound differently when it goes through a solid.
Sound waves travel at different speeds when traveling through different materials
Sound waves travel at different speeds when traveling through different materials because sound has different speeds in different media.
Sound is a type of wave that is propagated in compression and rare factions. When sound is propagated, it produces a sensation when it impinges on the ears.
The speed of sound through various media is different. The difference in the speed of sound in various media results in the fact that sound waves travel at different speeds when traveling through different materials.
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hogwarts school of wizardry
Answer:
Very good :)
Explanation:
When using acids and bases, note that these substances are Choose... . Make every effort to avoid contact with Choose... . Be sure to wipe up any spills Choose... .
Answer:
When using acids and bases, note that these substances are
corrosive
. Make every effort to avoid contact with
the skin and lab surfaces
. Be sure to wipe up any spills immediately
Explanation:
When using acids and bases, note that these substances are corrosive. Make every effort to avoid contact with the skin and lab surfaces. Be sure to wipe up any spills immediately.
What are acids and bases?An acid is any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance.
A base is a molecule or ion able to accept a hydrogen ion from an acid.
Acids and bases are corrosive in nature, they give a burning sensation when it comes in contact with skin, so handle this substance with care.
Due to their corrosive nature, Make every effort to avoid contact with the skin and lab surfaces.
Acid spills should be neutralized with sodium bicarbonate and then cleaned up with a paper towel or sponge. Do not use a strong base, such as sodium hydroxide, to neutralize a strong acid like hydrochloric acid.
Acids and bases neutralize each other, forming salt and water. A strong acid-strong base neutralization results in a neutral solution with a pH of 7.
Therefore, When using acids and bases, note that these substances are corrosive. Make every effort to avoid contact with the skin and lab surfaces. Be sure to wipe up any spills immediately.
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1.0 g of H_{2}O_{2} solution (30 wt%) was titrated with 29.29 mL of KMnO_{4} solution. What is the molarity of the KMnO_{4} solution
1.0 g of 30 wt% H₂O₂ is used to titrate 29.29 mL of 0.20 M KMnO₄ solution.
Let's consider the balanced equation for the reaction between H₂O₂ and KMnO₄.
2 KMnO₄ + 3 H₂O₂ → 3 O₂ + 2 MnO₂ + 2 KOH + 2 H₂O
1.0 g of H₂O₂ solution react. We can calculate the reacting moles of KMnO₄ considering that:
The concentration of H₂O₂ is 30 wt%.The molar mass of H₂O₂ is 34.01 g/mol.The molar ratio of H₂O₂ to KMnO₄ is 3:2.[tex]1.0gH_2O_2(Solution) \times \frac{30gH_2O_2}{100gH_2O_2(Solution)} \times \frac{1molH_2O_2}{34.01gH_2O_2} \times \frac{2molKMnO_4}{3molH_2O_2} = 0.0059molKMnO_4[/tex]
0.0059 moles of KMnO₄ are in 29.29 mL of solution. The molarity of KMnO₄ is:
[tex][KMnO_4] = \frac{0.0059mol}{0.02929 L} = 0.20 M[/tex]
1.0 g of 30 wt% H₂O₂ is used to titrate 29.29 mL of 0.20 M KMnO₄ solution.
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Describe combination chemical reaction
1. Combination between two elements :
2H2(g) + O2(g)⸻➤2H2O(l)
N2(g) + 3H2⸻➤2NH3(g)
C(s) + O2(g) ⸻➤CO2(g)
The combination reactions as shown in which a new compound is formed from its constituent elements are also called synthesis reactions.
2. Combination between two compounds-
CaO(s)+ H2O(l)⸻➤Ca(OH)2(aq)+ heat
quicklime⠀⠀⠀⠀⠀slakedlime
3. Combination between an element and a compound :
2CO(g)+O2(g) ⸻➤2CO2(g)
2NO(g) + O2(g) ⸻➤2NO2(g)
Question 4 of 10
Which of the following is the correct model of C.H14?
o
A.
O
B.
O C.
D.
Answer:
B
Explanation:
Option B is correct because you have 6 vertices, indicating that there ate 6 carbons in the compound.
Phần lớn axit nitric được sản xuất ra được dùng
Answer:
english
Explanation:
English English English English English English English English
A bike tire at a pressure of 2.4 atm and a
temperature of 290 K has a volume of 2.2 liters.
A child gets on the bike and rides it outside.
What is the new pressure if the temperature
outside is 296 K and his weight causes the tire's
volume to drop to 2.0 liters? please help!!!
Answer:
5.4 atm
Explanation:
P•V/T = P'•V'/T'
2.4•2.2/290 = P'•2/296
5.28/290 = P'/296 Multiply both sides by 296
1562.88/290 = P'
I'm = 5.4 atm
Do waves transmit matter?
Question 16 options:
No, waves do not interact with matter at all
Yes, all waves transmit matter
Yes, but only mechanical waves can transmit matter
No, waves are disturbances in matter but do not transmit matter
Answer:
No, waves are disturbances in matter but do not transmit matter
Explanation: I took the test
How are the electron structures of carbon (C) and oxygen (0) similar?
The Periodic Table
A. The highest sublevel is the 2s sublevel.
B. They both have 2 valence electrons.
C. They both have valence electrons in the 2p sublevel.
D. They both have valence electrons in the first main energy level.
Answer:
It's been a long while since I've done this but
Explanation:
I think the answer is D. They both have valence electrons in the first main energy level Carbon atoms are made up of 6 protons, 6 electrons, and 6 neutrons, whereas Oxygen atoms are made of 8 protons, 8 neutrons, and 8 electrons.
I might be very wrong..
how many moles of chloroethylene contain 5.47 x 10 26 molecules
Answer:
so each mole is 6.022 * 10^23
so subtract and we have 5.47 * 10^3
1000*5.47
5470/6.022
908.315 moles
908moles in sig figures
how can increase the rate of the preparation copper i iodide?
Answer:
Preparation. Copper(I) iodide can be prepared by heating iodine and copper in concentrated hydriodic acid, HI. In the laboratory however, copper(I) iodide is prepared by simply mixing an aqueous solution of potassium iodide and a soluble copper(II) salt such copper sulfate.
where is the answers?>???!!!!
Answer:
Explanation:
For what?
What is the mass of 4.2 moles of carbon?
Answer:12.01
Explanation:
A column is run with hexane first, then a hexane/ dichloromethane mixture, then 100% dichloromethane. What will happen is you mix up the hexane and dichloromethane i.e. ran the dichloromethane first?
If hexane and dichloromethane are being mixed up together i.e if dichloromethane is added first, the impurities will mix together and it will be difficult and unable to separate.
Hexane and dichloromethane are two different solvents with different properties used in column chromatography. While hexane is polar in nature dichloromethane occurs to be a non-polar solvent.
The best way to run this process in the column is to first add hexane, followed by gradual addition of dichloromethane. This will help to separate and distinguish each compound in the mixture.
However, if dichloromethane is added first, the compound will get eluted and there wlll be no separation. The only solution will be to evaporate the solvent and run the column once again with the steps explained above.
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CH3-CH2-NH-CH2-CH3
What’s the name for this
Answer:
Ethylamine
Explanation:
Ethylamine also known as Ethanamine is an organic compound with the formula CH3CH2NH2.
I hope this is helpful!
God BLESS!
Which pair of atoms most likely would form an ionic bond?
Ca and Sr
C and O
K and Br
Answer:
K and Br
Explanation:
K and Br would form an ionic bond because K (potassium) is a metal and Br (bromine) is a nonmetal. Ionic bonds are created between metals and nonmetals.
What next action can be done to save blue whales?
Answer:
donate money to a whale organization made to fight the problems
Explanation:
What is changed about a rock
during mechanical weathering?
Answer: Mechanical weathering (also called physical weathering) breaks rock into smaller pieces.
Explanation: That means the rock has changed physically without changing its composition.
Under certain conditions, H_{2}O_{2} can act as an oxidizing agent; under other conditions, as a reducing agent. A good theoretical explanation for this is that an atom within a compound can become more stable by either gaining OR losing electrons. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a True b False
Answer:
True
Explanation:
Not sure why but it's true.
The theoretical explanation given for the reason why H₂O₂ can act as an oxidizing agent and other times as a reducing agent is; True
We are told that under certain conditions, H₂O₂ can act as an oxidizing agent and under other conditions it can act as a reducing agent.
Now, an oxidizing agent is one that gains electrons and undergoes reduction in a chemical reaction while a reducing agent is one that loses electrons and undergoes oxidation in a chemical reaction.Now, an atom that loses electrons within a compound would become more stable if the loss of electrons means its' new valence shell has 8 electrons.
Whereas, an atom that gains electrons within a compound would become more stable if the gain of electrons makes its' valence shell to fulfill the octet rule by having 8 electrons in its' outermost shell.
The oxygen atom in the given H₂O₂ (hydrogen peroxide), has an oxidation state of -1. Now, due to the fact that this -1 oxidation state lies between the more popular extremes of 0 and -2 oxygen oxidation states, it means that it can either act as an oxidizing agent or a reducing agent.In conclusion, the theoretical explanation is true.Read more at; https://brainly.com/question/15867111
Please help!!!
i will mark brainliest
Answer:
Pressure: doubles
Volume: stays constant
Moles: doubles
Gas Constant: halves
Temperature: stays constant
Explanation:
hope this helps. . . <3
What is the mass number
Answer:
the total number of protons and neutrons in a nucleus.
The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus. It is approximately equal to the atomic mass of the atom expressed in atomic mass units.
2ZnSO4
Is that name of element # of atoms? Total of atoms? The #4 is a (coefficient or subscript?
Help a friend here,,how to describe the lifecycle of a moss plant..
check the image i sent you.
How do you explain the relationship between brightness and concentration of salt?
The relationship between brightness and salt concentration is a direct
relationship.
Brightness and salt concentration having a direct relationship means that as
the salt concentration increases, the brightness increases and vice versa.
This system contains two electrodes and salt water which serves as the
electrolytes.
The salt water which contains sodium and chlorine ions flow between both
ends thereby generating the electricity in the system.
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In boron monofluoride, how many total bonds would boron need to make with the fluorine in order to achieve an octet, while also allowing fluorine to achieve an octet
In boron monofluoride, boron will need 5 bonds to attain octet rule while fluorine will require 1 bond to attain octet rule.
The valency electron of an atom determines the kind of bonding that occurs between atom of elements.
Therefore,
The bonding between Boron and fluorine to form boron monofluoride are as follows:
An electronically neutral boron atom has 5 electrons. Using electronic configuration, the outer electrons are 3 (Using the model 2 8 8 2). It will require 5 electrons to attain the octet rule.
On the other hand an electronically neutral fluorine atom has 9 electrons. The outer electrons are 7 electrons. Naturally, it will require 1 electron to attain octet rule.
In the case of boron monofluoride, 1 atom of boron combines with 1 atom of fluorine to form the compound. Therefore, the total valency electrons of the diatomic compound is 10 electrons altogether.
Generally, In boron monofluoride, boron will need 5 bonds to attain octet rule while fluorine will require 1 bond to attain octet rule.
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Boron needs four bonds in order to satisfy the octet rule while fluorine needs only one bond in order to satisfy the octet rule.
Boron is an element in group 13 of the periodic table. This means that boron has three valance electrons. The octet rule states that an atom must have eight valence electrons in order to attain stability.
This implies that boron must have a total of four bonds in order to satisfy the octet rule. On the other hand, fluorine which has seven valence electrons only needs one bond in order to satisfy the octet rule.
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4Na + O2 2Na2O
How many moles of Na2O will be produced from 4.35 x 10^24 atoms of Na?
with explanation
Using the photo, solve the world scramble to answer the question: What happens to Ice as it heats up? T I G A C N S E H E A S T T
Answer:
hi
Explanation:
hi
Answer:
When heat (a form of energy) is added, the ice melts into liquid water. It has reached its melting point – 0°C. Continue to apply heat, and the water will turn into water vapour, which is water in its gaseous state.
When ice is heated, it will melt into the liquid state of water. This change is called melting. Melting of ice is a reversible change as we can again obtain ice by freezing the melted water.
Solid magnesium reacts with aqueous copper(I) chloride to form aqueous magnesium chloride and solid copper. Write a balanced chemical equation for each chemical reaction.
Answer:
Explanation:
Mg(s) +2CuCl (aq) -> MgCl2(aq) + 2Cu(s)
Mg(s) +2CuCl (aq) → MgCl[tex]_2[/tex](aq) + 2Cu(s) is the balanced chemical equation for each chemical reaction.
What is balanced chemical equation?An equation for just a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In other words, both sides of a reaction have an equal balance of mass and charge.
The ingredients and outcomes of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified. Mg(s) +2CuCl (aq) → MgCl[tex]_2[/tex](aq) + 2Cu(s) is the balanced chemical equation for each chemical reaction.
Therefore, Mg(s) +2CuCl (aq) → MgCl[tex]_2[/tex](aq) + 2Cu(s) is the balanced chemical equation for each chemical reaction.
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