Answer:
An alloy is a mixture or metallic-solid solution composed of two or more elements. Examples of alloys include materials such as brass, pewter, phosphor bronze, amalgam, and steel. Complete solid solution alloys give single solid phase microstructure. Partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal history. An alloy’s properties are usually different from those of its component elements.
Examples of alloys include materials such as brass, pewter, phosphor bronze, amalgam, and steel. Complete solid solution alloys give single solid phase microstructure. Partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal history. An alloy’s properties are usually different from those of its component elements.
image
Steel: Steel is an alloy whose major component is iron.
Alloy constituents are usually measured by mass. An alloy is usually classified as either substitutional or interstitial, depending on its atomic arrangement. In a substitutional alloy, the atoms from each element can occupy the same sites as their counterpart. In interstitial alloys, the atoms do not occupy the same sites. Alloys can be further classified as homogeneous (consisting of a single phase), heterogeneous (consisting of two or more phases), or intermetallic (where there is no distinct boundary between phases).
Alloying a metal involves combining it with one or more other metals or non-metals, which often enhances its properties. For example, steel is stronger than iron, its primary element. Physical properties (density, reactivity, conductivity) of an alloy may not differ greatly from those of its constituent elements, but its engineering properties (tensile strength and shear strength) may be substantially different.
Explanation:
1. Which liquid sample is a pure substance?
Table 1: Boning point of the samples
Samples Temperature Observation while heating
Liquid A
Liquid B
2. Which soăc sample is a pure substance?
Scenario 1: Meiting point of the said samples
Samples Appearance Observation while melting
Solid
Solid B
The whole Activity , poem and paragraph is missing in the question.
Answer:
(1) Liquid A
(2) Solid A
Explanation:
Using this part of the given poem
Substances and mixtures behave differently,
During boiling and melting most especially
Boiling point of substance is fixed while mixture is not
Substance melts completely but mixture does not
The boiling point of the Pure substance remain fixed after reaching its boiling point this is shown by Liquid A
Solid A is melting completely so Solid A is a pure substance.
Florian discovers a rock that is broken into pieces. Each piece has several bands.
Which type of rock does Florian predict these pieces will change into when subjected to heat and pressure?
Answer:
Igneous rock
Explanation:
The rock held by Florian is already a metamorphic rock. On further subjection for heat and pressure, the rock will melt to become igneous rocks.
A banded rock is termed a gneissIn such a rock body, areas concentrating dark minerals and light minerals alternates to form the distinct domains. This in turn results from a very high grade metamorphic event. In retrospect, if this rock body is further heated, a melt or magma form which is the material by which igneous rocks are derived from.Which of the following molecules do X and Y represent?
A) simple sugar B) amino acid
D) hormone
C) fat
Answer:
d) hormone is the answer
Helllllpppp
Which of the following diagrams is the correct electron dot diagram for Al?
Answer:
D)
Explanation:
Aluminum has 3 valence electrons; therefore, there should only be 3 separate dots.
The correct electron dot diagram for Aluminium (Al) is option D.
The electron dot diagram is used to to represent the valence electrons of an element.
This can also be called the Lewis dot formulas.
The Al represents the element, Aluminium, which falls under group 3 of the periodic table.
This simply means that it has 3 Valence electrons in its outermost shell.
Also, valence electrons are those electrons that are located at the outer most shell of an atom which can be donated or shared during a chemical reaction.
Therefore, the diagram that represents the electron dot diagram for Al is D because it contains 3 dots which signifies the valence electrons of Al.
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a diatomic molecule like O2 is always _____ because electrons are shared ______.
A diatomic molecule like O2 is always Neutral because electrons are shared equally
From the question we are told
A diatomic molecule like O2 is always _____ because electrons are shared ______.
Generally
Oxygen molecule is diatomic molecule that is made up of two equally charged oxygen molecule and thereby creating a Neutral compound be cause its electrons are shared equally.
Therefore
The correct statement states
A diatomic molecule like O2 is always Neutral because electrons are shared equally
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When an object is acted on by unbalanced forces, the object will always accelerate
Answer:
True
Explanation:
This statement is true. When unbalanced forces act upon a certain object it will always cause the object to accelerate in a certain direction. Depending on the current movement of the object the stronger force in these unbalanced forces will cause the object to either speed up, slow down or change direction or even a combination of these in a certain span of time. Regardless, in every part of this process, the object will be accelerating.
Why does Fluorine have a higher electronegativity than Carbon?
Answer:
Fluorine has a higher electronegativity than carbon
Explanation:
Electronegativity trend
-As you go from left to right across the periodic table, the electronegativity increases.
-As you go from top to bottom, the electronegativity decreases.
-We know that both carbon and fluorine are in the same energy level or period 2. However, Carbon is in group 14, which has 4 valence electrons, while fluorine is in group 17, which has 7 valence electrons. Therefore, fluorine has a higher electronegativity because fluorine is desperately wanted to gain 1 more valence electron to become stable (octet rule).
Sandpaper is a type of rough material that is rubbed on other surfaces to make them smoother. Ms. Fonger is rubbing a piece of sandpaper on wood that will be used to make a table. What kind of energy is being produced?
Answer:
Heat energy is being produced due to friction.
I Need Help!!! 50 POINTS AND BRAINLIEST!!! Fill out the study guide ASAP!!!
Please and thank you. (If you give me all of the correct answers I will create a 100 point question for you.
Answer: I saw the other question with screen shot Thanks
4. Answer, Like gases, plasmas have no fixed shape or volume, and are less dense than solids or liquids. But unlike ordinary gases, plasmas are made up of atoms in which some or all of the electrons have been stripped away and positively charged nuclei, called ions, roam freely.
5. Answer The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy. Another example of kinetic energy is the energy associated with the constant, random bouncing of atoms or molecules.
6.Answer is solid
Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.
7. Answer Water behaves differently to most other substances because, in its solid state (ice), its particles are less densely packed than in its liquid state. This is why ice floats.
8. Answer 212 degrees F.
Sea Level: Water boils at 212 degrees F. and simmers at 190 degrees F.
9. Answer When an object is heated the motion of the particles increases as the particles become more energetic. If it is cooled the motion of the particles decreases as they lose energy.
10. Answer CHEMISTRY TERM PHASE CHANGE
Fusion/Melting Freezing Vaporization/Boilin Condensation Sublimation Deposition Solid to a Liquid Liquid to a Solid Liquid to a Gas Gas to a Liquid Solid to a Gas Gas to a Solid
11. Answer is Energy is consumed (endothermic) to melt ice (solid to liquid) so the opposite process (liquid to solid) must be exothermic.
12.In simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system.
ok alright. But where’s the question?
5. How many grams of silver are produced in the decomposition of 35.0 g silver oxide?
2A920 4Ag + O2
65.2 g Ag
61.0 g Ag
32.6 g Ag
16.3 g Ag
Answer:
Either 32.6 or 16.3
Explanation:
I just took the quiz and failed with the other two answers lol
Answer:
32.6 g Ag
Explanation:
All combustion reactions release energy.
-True
-False
Answer:
true
Explanation:
All combustion reactions are chemical changes which release energy , hence the statement is true.
What are chemical changes?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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b) 25.8 kJ of heat are added to a sample of water.
The temperature of the water changes from 25.0 °C to 60.6 "C.
What is the mass of the water sample? SHOW ALL WORK.
Answer:
1.73*10^-4 g
Explanation:
Help ASAP PLZZZZzzzzzzzzzzzzzzzzzzzzzzzz
You are investigating the properties of an organic molecule. You discover that it directs another molecule to synthesize protein. What organic molecule is this?
A.
amino acid
B.
carbohydrate
C.
DNA
D.
lipid
Answer:
I think it's lipid but if it's not it's dna
Explanation:
The other answer say carb and someone said it's wrong i picked amino acid on my test and it was wrong.
What is the pressure in a 27.0-L cylinder filled with 44.9 g of oxygen gas at a temperature of 315 KK
Answer:
1.343 atm
Explanation:
We are given the following;
Pressure, p = ?
Volume v = 27 L
Mass of oxygen = 44.9 g
Temperature, T = 315 K
The formular relating all these variables is the equation;
PV = nRT
where R = gas constant = 0.08206 L atm / mole K
To obtain n, we use;
number of moles, n = Mass / molar mass = 44.9 / 32 = 1.403 moles
From the ideal gas equation;
P = nRT / V
P = 1.403 * 0.08206 * 315 / 27
P = 36.27 / 27 = 1.343 atm
The pressure in a 27.0-L cylinder filled with 44.9 g of oxygen gas at a temperature of 315 K is 1.34atm
IDEAL GAS LAW:
The pressure of a given gas can be calculated by using the ideal gas law equation as follows:PV = nRT
Where;
P = pressureV = volume n = number of molesR = gas law constant (0.0821 molK/Latm)T = temperatureAccording to this question, a 27.0-L cylinder filled with 44.9 g of oxygen gas at a temperature of 315 K. The number of moles of the oxygen gas (O2) = 44.9g ÷ 32g/mol = 1.403molP × 27 = 1.403 × 0.0821 × 31527P = 36.284P = 36.284 ÷ 27P = 1.34atmTherefore, the pressure in a 27.0-L cylinder filled with 44.9 g of oxygen gas at a temperature of 315 K is 1.34atm.Learn more about ideal gas law equation at: https://brainly.com/question/4147359?referrer=searchResults
93196
A student sits on her foot for 15 minutes and when she stands up she does not have any feeling in her foot. This is because she has cut off the blood supply to her foot by sitting on it. This directly affects which body system?
A
Digestive
B
Immune
C
Nervous
D
Circulatory
.
Can someone help me
Explanation:
hsbus r did iedj iadj sis aj sis dj akd bzaid ks akr ka he k sits wk do that s
Which drawing best accounts for the polarity of methanol, CH3OH, and the bond polarities that make a major contribution to the overall molecular polarity
The question is incomplete, the question is;
Which drawing best accounts for the polarity of methanol, CH3OH, and the bond polarities that make a major contribution to the overall molecular polarity?
A) drawing (1) B) drawing (2)
D) drawing (4) C) drawing (3)
Answer:
B) drawing (2)
Explanation:
In Chemistry, the direction of dipole is shown from positive end to negative end.
The image that contains the options in the question asked has been attached.
We can see in image 2 that the oxygen atom was correctly designated as the negative end of the dipole while the carbon and hydrogen atoms were each designated as positive ends of the dipole in accordance with the magnitude of electronegativity difference between the two atoms. The net dipole moment is now taken in the direction shown in image 2. This is the correct answer.
Drawing 2 best accounts for the polarity of methanol, CH3OH. Therefore, the correct option is B.
A carbon atom (C) joins with three hydrogen atoms (H), a hydroxyl group (OH), and three other atoms to form methanol (CH3OH). An oxygen atom (O) is attached to a hydrogen atom to form a hydroxyl group. The three hydrogen atoms and hydroxyl groups are arranged in three dimensions, giving the molecular structure of methanol a tetrahedral form around the core carbon atom.
A polar covalent bond is formed between oxygen and hydrogen because the oxygen atom in the hydroxyl group is more electronegative than the carbon and hydrogen atoms. Due to the unequal sharing of electrons, oxygen has a partial negative charge (-) and hydrogen has a partial positive charge (+), resulting in this polarity.
So, the correct option is B.
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Your question is incomplete, most probably the complete question is:
Which drawing best accounts for the polarity of methanol, CH3OH, and the bond polarities that make a major contribution to the overall molecular polarity?
A) drawing (1) B) drawing (2)
D) drawing (4) C) drawing (3)
Find the wavelength of a photon of light with energy of 9.02x10^-19 J.
Answer:
2.21 x 10⁻⁷m⁻¹
Explanation:
Given parameters:
Energy of the photon = 9.02 x 10⁻¹⁹J
Unknown:
Wavelength of the photon = ?
Solution;
The wavelength and energy of a photon are related using the expression below;
E = [tex]\frac{hc}{wavelength}[/tex]
h is the Planck's constant = 6.63 x 10⁻⁴m²kg/s²
c is the speed of light
E is the energy
h c = E x wavelength
Wavelength = [tex]\frac{hc}{E}[/tex] = [tex]\frac{6.63 x 10^{-34} x 3 x 10^{8} }{9.02 x 10^{-19} }[/tex]
Wavelength = 2.21 x 10⁻⁷m⁻¹
Write an equation that represents the action in water of calcium hydroxide as an Arrhenius base
Explanation:
Calcium hydroxide = Ca(OH)₂
Water = H₂O
An Arrhenius base is a substance which interacts with water to yield excess hydroxide ions, OH⁻ in an aqueous solution.
The reaction in water;
Ca(OH)₂ → Ca²⁺ + 2OH⁻
The medium of this reaction is water.
If all other variables remain unchanged, what happens to the output force when the area of the input piston is doubled?
Answer:
1250N
Explanation:
This question is based on pascal's Law.
So By Pascal's Law
=
therefore =force on input piston =25N
= Force or weight on output person.
therefore after putting the values we get,
= (25x 1500)/30
=1250N
Name the following compounds
Answer:
28. Sodium Bromide
29. Calcium Chloride
30. Potassium Hydroxide
31. Copper (II) Nitrate
32. Silver Chromate
33. Ammonium Perchlorate
Consider the atom with the chemical symbol Ru.
What would be the mass number for an atom of Ru which has
52 neutrons?
Answer:
96.
Explanation:
Select all the words that describe what the elements have in common if they are located on the same PERIOD.
Orbitals
Rounds
Shells
Dots
Energy Levels
Circles
Answer:
Orbitals
Shells
Energy Levels
Explanation:
Elements in the same period will have the same energy levels which is the same as orbitals and shells.
The period of an element indicates the energy level in an atom. Elements in period 1 will have one energy level or shell or orbitals. Down a group this is not the case. The energy level increases from top to bottom. As we go down the group, we are transiting from one period to another.Use the periodic table to select which type of bond is present and which of the listed properties is most
likely for each substance.
A=
Cu3Zn2
A
B
O2
C
D
Answer:
A= Metallic
B= Conducts electricity as a solid
C= Covalent
D=Does not conduct electricity
Explanation:
I wrote that all matter consists of tiny particles called atoms. I also thought all atoms of a specific
element are identical. Who am I?
Answer:
John Dalton
Explanation:
John Dalton in 1808 suggested that all matter consists of tiny particles called atoms and that the atoms of a specific element are identical.
He postulated the Dalton's atomic theory which has the following important parts;
All matters consists of indivisible particles called atomsAtoms of the same element are similar and are different from atoms of other elements. Atoms can neither be created nor destroyed. Atoms combine in simple whole ratios to form compounds.The Molar mass(M.w) in g/mol of 6.3 grams of an ideal gas that placed in 5.0 L tank at ST
P( 273 K, 1 atm) is? The identity of the gas is ?
32 g/mol, O2
71 g/mol, C12
28 g/mol, N2
16 g/mol, CH4
Answer:
28 g/mol, N2
Explanation:
Given data:
Volume of gas = 5.0 L
Mass of gas = 6.3 g
Pressure = 1 atm
Temperature = 273 K
Molar mass of gas = ?
Solution:
We will calculate the density first.
d = mass/ volume
d = 6.3 g/ 5.0 L
d = 1.26 g/L
Molar mass:
d = PM/RT
M = dRT/P
M = 1.26 g/L× 0.0821 atm.L/mol.K × 273 K/ 1 atm
M = 28 g/mol
Molar mass of N₂ is 28 g/mol thus given gas is N₂.
1s22s22p63s23p64s13d10 which element is this
Answer:
Copper
Explanation:
The given electronic configuration is of copper which sums upto 29 which is the atomic number of copper.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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A doorknob makes it easier for you to open doors because it is what type of simple machine?
Answer: Wheel and Axle
Both of these work together to form a simple machine. You can't have one without the other.
If you try to turn just the axle itself, then you'll find it takes a lot of work. This is because the inertia of the axle wants to keep the object at rest. Also, you won't have a lot of torque due to the small radius compared to what a doorknob can offer.
Using a doorknob is like putting a (steering) wheel on an axle. This increases the radius and therefore increases the torque. You put in less work into the system and get more out of it.
what type of energy does most energy end up as
Answer:
The energy associated with motion ends up as kinetic energy . The energy associated with position ends up as potential energy .
Explanation:
