Answer: The wire is still copper and does not change by cutting it
Explanation:
Democritus postulated that all materials were composed of these tiny particles called as "atomos".
Daltons postulates are:.
1. All matter is made of very tiny particles called atoms.
2. Atoms is indivisible.
3. Atoms of a given element are identical in mass and chemical properties.
4. Atoms of different elements have different masses and chemical properties.
5. Atoms combine in the ratio of small whole numbers to form compounds.
6. The relative number and kinds of atoms are constant in a given compound.
Thus when copper wire is cut into the smallest possible pieces, the atoms were intact as they are indivisible and all atoms have same mass and chemical properties.Thus the wire is still copper and does not change by cutting it
This base-catalyzed isomerization involves the following steps: 1. Deprotonation to form tetrahedral intermediate 1; 2. Collapse of the tetrahedral intermediate and bond cleavage to form enolate ion 2; 3. Proton transfer to form enolate ion 3; 4. Intramolecular aldol reaction to form tetrahedral intermediate 4. Write out the reaction on a separate sheet of paper, and then draw the structure of tetrahedral intermediate 1.
Answer:
Explanation:
The objective of this question is to show the stepwise reaction mechanism for the base-catalyzed isomerization. This mechanism is shown in the attached diagram below together with its intermediary and enolate ions.
Convert this word equation into a balanced formula equation, please.
Copper (II) nitrate reacts with aluminum to form aluminum nitrate and copper.
Answer:
3Cu(NO3)2 + 2Al —> 2Al(NO3)3 + 3Cu
Explanation:
From the question given above,
Copper (II) nitrate reacts with aluminum to form aluminum nitrate and copper. This can be obtained represent as follow:
Cu(NO3)2 + Al —> Al(NO3)3 + Cu
Thus, we can balance the above equation as follow:
Cu(NO3)2 + Al —> Al(NO3)3 + Cu
There are 2 atoms of N on the left side and 3 atoms on the right side. It can be balance by putting 3 in front of Cu(NO3)2 and 2 in front of Al(NO3)3 as shown below:
3Cu(NO3)2 + Al —> 2Al(NO3)3 + Cu
There are 3 atoms of Cu on the left side and 1 atom on the right side. It can be balance by putting 3 in front Cu as shown below:
3Cu(NO3)2 + Al —> 2Al(NO3)3 + 3Cu
There are 2 atoms of Al on the right side and 1 atom on the left side. It can be balance by putting 2 in front of Al as shown below:
3Cu(NO3)2 + 2Al —> 2Al(NO3)3 + 3Cu
Thus, the equation is balanced.
what is the empirical formula of a compound that is found to consist of 56% chorine and no other element except iron
Answer:
FeCl₂
Explanation:
Empirical formula is the simplest formula of a compound.
Mass percentage of Chlorine = 56%
Mass percentage Iron = 100 - 56 = 44%
Elements
Fe Cl
Percentage mass 44 56
moles 44/55.85 56/35.5
0.79 1.56
Divide by the smallest
number 0.79/0.79 1.56/0.79
1 2
The empirical formula of the compound is FeCl₂
Which of the following equations demonstrates an actual chemical reaction that forms a new substance?
A1: ZN + 2HCl → 2NCl2 + H2
A2: H2O + NaCl → H2O
A3: Zn + Al + Cu → Zn + Cu + Al
A4: C12H22O11 + H2O → H2O + C12H22O11
Answer: [tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]
Explanation:
A chemical reaction is said to have occured when reactants react to form new products where the atoms undergo a change in bonding.
From the given reactions:
1. [tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]
Here Zn combines with hydrochloric acid to form zinc chloride and hydrogen.
2. [tex]H_2O+NaCl\rightarrow H_2O[/tex]
Here water remains as such as no new substance is formed.
3. [tex]Zn+Al+Cu\rightarrow Zn+Cu+Al[/tex]
Here no new substance is formed.
4. [tex]C_{12}H_{22}O_{11}+H_2O\rightarrow H_2O+C_{12}H_{22}O_{11}[/tex]
Here no new substance is formed.
Thus [tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex] demonstrates an actual chemical reaction that forms a new substance
Answer:
hope this helps you!
Explanation:
Put the elements in order from easiest to hardest to remove an electron. Ba,Be,Ca,Sr.
Answer:
Ba,Sr,Ca,Be
Explanation:
as atomic size increases ionisation potential decreases
Directions: Fill in the 12 steps in the decay of U-235 in the diagram below.
Begin with U-235 and finish with an
isotope of lead. The particles emitted in each step are listed below. Use the periodic table to find information about
mass numbers, atomic numbers, and chemical symbols. Place the correct symbol in the space corresponding to the
correct mass number and atomic number.
Answer:
SUPER MARIOLWEJHRTÑWQEGTPWIQETGQWKÑEJGBKSDLJBGKSJDLGB
Explanation:
How is the name of each element in the periodic table represented? A. The first two letters of the element's name are used for the table. B. Letters are assigned to each element by the scientist who discovered it. C. Letters are given to represent each element based on when it was discovered. D. One or two letters are used to represent the name of each element.
Answer:
D. One or two letters are used to represent the name of each element.
Explanation:
The name of each element in the periodic table is symbolized by one or two letters.
There different ways of achieving this. Sometimes;
the first letter of the name of the element is used to represent it for example, hydrogen = H the first two letters are sometimes used, for example Calcium Cathe Latin name is also used for example Gold is Aurum and is represented as Au.These are some of the ways of symbolizing the name of each element
The EPA tracks the amount of DDT that has entered into our water systems to ensure water safety. Calculate the ppm for a solution made by putting 2.7 g of DDT into a 59000 g of water. Assume masses are additive
a. 46 ppm
b. 0.0046 ppm
c. 4.6 ppm
d. 4.6 x 10^-5 ppm
which one does not share the same properties as the other
Si
Ti
At
Explain why
Answer:
Ti
Explanation:
Ti is titanium and does not share any similar properties with the likes of Si, silicon and At, astatine.
Titanium is a transition metal and a solid. Silicon and Astatine are non - metals. Silicon and Astatine also belongs to the p-block on the periodic table whereas Titanium is found on the d-block. Silicon and Astatine would prefer to take part in reactions where they can gain electrons because they are non metals whereas Titanium due to its metallic property would prefer a reaction where it can lose electrons.A student has 2 rubber balls of the same size and weight. Ball A is still and Ball B is rolling.Ball B hits Ball A, and Ball A start moving. Why does Ball A start moving?
A). Ball A is repelled by Ball B ,
B). Ball B is attracted to Ball A ,
C). Ball B transfers energy to Ball A ,
D). Ball A transfers energy to Ball B
Answer:
C). Ball B transfers energy to Ball A
Explanation:
The motion of ball A is a because of the energy it acquires.
Ball A initially due to its position posses potential energy due to its position.
The moving ball B has kinetic energy due to the motion of this ball.
Due to the collision, momentum is transferred from the moving ball to the static one. As the momentum of the static ball changes, potential energy is converted to kinetic energy. The magnitude of the energy possessed by the static ball must be lesser than that of the moving.Answer:
c
Explanation:
—————————Are formed by a combination of two or more different kinds of Atom
Atom of the same ———————————-element have identical properties
Answer:
1. molecules.
2. size ,shape and mass.
How many protons, electrons, and neutrons? ANSWEN
2+
23
6521
26
Protons
Electrons
Neutrons
28
30
65
3-
31
Protons
Electrons
Neutrons
"As
57 Fe
32
3+
33
35
36
DRAGO
Protons
Electrons
Neutrons
14
ME
US
Answer:
maybe 20 butvam not sure ooo
Plzz tell me the answer u need help im kinda confused
All of the following are examples of an external stimulus except -
Group of answer choices
Ⓐ hunger.
Ⓑ sunlight.
Ⓒ a loud sound.
Stimuli are the senses that cause an organism to react. Internal sensations include things like hunger and thirst that are produced inside the body, hence option A is correct.
What is stimulus?A stimulus is a perceptible alteration in the internal or external surroundings of an organism's physical or chemical composition.
Sensitivity is the capacity of an organism or organ to recognize external stimuli and to respond appropriately to them.
A stimulation that comes from outside the organism is known as an external stimulus. Light is one example of an outside stimulation. Although it comes from outside the body, it has an impact there as well.
Therefore, sunlight and a loud sound are the examples of external stimuli, while hunger is an internal stimulus.
Learn more about stimulus, here:
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How many moles are in
.77 liters of Br2 at STP?
Answer: 0.034354
Explanation:1 mole=22.4 liters of Br2 at STP so, 22.4x=0.77
x= 0.034354
Answer:
0.034354
Explanation:
Just did worksheet
jagsir saw his mother adding dried neem leaves to the metal vessel filled with wheat. jagsir asked the reason for this from his mother. what would be his mothers reply?
Answer:
Because i want to. would be the reply
Explanation:
VOTE ME BRAINLIEST PLSSSSSSSSS
Answer:
none of the above
option d
solve the equation:
1) 3,2 m²= x dm²= x cm²
BRAINLIEST!!!!
Answer:
sin = (330)
csc = (60)
−4 = cot (−45)
Explanation:
im not sure what you were looking for, make me brainlest please?
? C+? O2 +? CO2,
what is the maximum amount of CO2 which
could be formed from 13.19 g of C and 15.92 g
of O2?
Answer in units of g.
Look at the mole ratio in the balanced equation
2CO + O2 ==> 2CO2
3.44 mol O2 x 2 mol CO/mol O2 = 6.88 moles CO
Water is a substance made up of the elements hydrogen
and oxygen.
How many types of atoms make up a particle of water?
A. 2
B. 3
C. 4
D. 1
Answer:
A. 2
Explanation:
A particle of water is made up of two hydrogen atoms and one oxygen atom. However, the question asked for how many types of atoms there are, so the answer is 2.
answer two quetions.......
Answer:5.=D
6.=B
Explanation:
What is the mass of 0.8 mole of water molecules.
Answer:14.4g
Explanation:
Suggest reasons for and against the inclusion of hydrogen in the main group of the periodic table
Answer:
See explanation
Explanation:
Hydrogen has only one valence electron. Sometimes, hydrogen is included as part of group 1 or 17 in the periodic table. Is this correct? Well, the answer to this question is not so straight forward!
Let us remember that hydrogen forms a univalent positive ion H^+ just like the group 1 elements, but it also forms a univalent negative ion H^- just like group 17 elements. Also, hydrogen is a gas and forms a molecular diatomic compound just like group 17 elements. This is not the case with other group 1 elements. We can see that hydrogen is chemically and physically dissimilar to other group 1 elements hence one can logically argue against its inclusion in group 1. Also, it is not a halogen, so we can also argue against its inclusion in group 17.
However, it is convenient to include hydrogen in the main groups 1 or 17 when discussing its chemical properties in order to make it easier to assimilate. If we place hydrogen in group 1, we can understand that it forms univalent positive ions. Similarly, if we place it in group 17, we understand that it forms univalent negative ions.
Most times hydrogen is just written separately at the top right corner of the periodic table and not as a member of any group because of the issues outlined above.
Hydrogen is placed in the main group of the periodic table since it has only one electron in it and it also behaves like alkali metal properties.
Hydrogen atom:Hydrogen forms a univalent positive ion [tex]H^+[/tex]group 1 elements, but it also forms a univalent negative ion [tex]H^-[/tex]group 17 elements. Also, hydrogen is a gas and forms a molecular diatomic compound just like group 17 elements.
This is not the case with other group 1 elements. We can see that hydrogen is chemically and physically dissimilar to other group 1 elements hence one can logically argue against its inclusion in group 1. Also, it is not a halogen, so we can also argue against its inclusion in group 17.
If we place hydrogen in group 1, we can understand that it forms univalent positive ions and if it is placed in halogen group it will form univalent negative ion.
Find more information about Hydrogen here:
brainly.com/question/25597694
help me in my this plzzz
Answer:
a is oxidation
b is reduction
c is reduction
d is oxidation
hope it helps you
please help GIVING brainliest
Answer:
heat wave
Explanation:
A high pressure system is a whirling mass of cool, dry air that generally brings fair weather and light winds. When viewed from above, winds spiral out of a high-pressure center in a clockwise rotation in the Northern Hemisphere.
write the general strucktures of
A. ketone b. aldehyde c. carboxylic acid d. ester
A.ketone
R-CO-R
B.aldehyde
R-CH=O
c.carboxylic acid
R-COOH
d.ester
R-CO-O-C-R
What is the velocity of a plane that traveled 2,800 miles from New York to California in 5.0 hours?
Answer:
560 mph East
Explanation:
Velocity is just speed with direction pretty much.
Write down the name and symbol of the particle formed when the magnesium atom loses two electrons
Answer:
A magnesium atom must lose two electrons to have the same number electrons as an atom of the previous noble gas, neon. Thus, a magnesium atom will form a cation with two fewer electrons than protons and a charge of 2+. The symbol for the ion is Mg2+, and it is called a magnesium ion.
How many moles of zinc are there in 0.890 g of zinc?
Answer:
There are
4.517
⋅
10
23
atoms of Zn in 0.750 mols of Zn.
Explanation:
Since we know that there are
6.022
⋅
10
23
atoms in every mole of a substance (Avogadro's Number), there are
6.022
E
23
⋅
0.750
atoms of Zn in 0.750 mols of Zn.
Answer:
There are 4.517 ⋅ 10 23 atoms of Zn in 0.750 mols of Zn. have a good day:)
Explanation:
A hypothesis is a
a. concise statement of behavior that is always the same under the same conditions
b. set of quantitative data
C. tentative explanation or predication based upon experimental observations
d. well-tested unifying principle that explains a body of facts
e. mathematical formula that models a pattern of behavior
concise statement of behavior that is always the same under the same conditions
Answer:
the answer is c or d
Explanation:
you can cross out e because it dont make any sense
b thats just data
a is the definition of law
boron is a non metal why
Explanation:
Boron is a non metallic element and the only non-metal of the group 13 of the periodic table the elements. Boron is electron-deficient, possessing a vacant p-orbital. ... It reacts with metals to form borides. At standard temperatures boron is a poor electrical conductor but is a good conductor at high temperatures
Let's say you asked how many moles of O2
are needed to react with 24 moles of C2H6.
Answer:
7
Explanation: