Answer:
1. from 2. to
Explanation:
Changes in which two characteristics can indicate a physical change?
Answer:
Physical changes involve states of matter and energy.
Explanation:
No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.
The characteristics that can be changed in the physical change has been shape or size of the compound.
Change in the element has been classified as chemical and physical change. The chemical change has been given as the change in the chemical composition of the elements.
The physical change has been the change in the state and form of the element, that has been reversible.
The characteristics that can be changed in the physical change has been shape or size of the compound.
For more information about the physical change, refer to the link:
https://brainly.com/question/1984022
23. A 54-gram sample of an unknown material has a volume equal to 20 cm'. Based on its density,
could the sample be aluminum? Explain.
Answer:
The density of aluminum is 2.7 g/cm³. Thus given sample is aluminum.
Explanation:
Given data:
Mass of sample = 54 g
Volume of sample = 20 cm³
Density of sample = ?
Is the sample is aluminum = ?
Solution:
We will calculate the density from given mass and volume.
d = m/v
d = density
m = mass
v = volume
d = 54 g/ 20cm³
d = 2.7 g/cm³
From literature it is known that the density of aluminum is 2.7 g/cm³. Thus given sample is aluminum.
Which interaction produces dispersive forces by creating temporary dipoles that induce dipoles in other molecules?
a. dipole-dipole
b. hydrogen bonds
c. dipole-induced dipole
d. induced dipole-induced dipole
Answer:
The answer is d. induced dipole-induced dipole
Explanation:
I did the test.
Answer:
D: induced dipole-induced dipole
Explanation:
Which substance is a strong electrolyte?
O NH3
O Ba(OH)2
O C12H22011
O CH3COOH
Answer:
Ba(OH)2 is a strong base, so it conducts electricity well
Explanation:
The dissociation of a strong electrolyte is apparent by its reaction arrow, which only points toward products. In contrast, the reaction arrow of weak electrolytes points in both directions. The general form of the strong electrolyte equation is: Strong acids, strong bases, and ionic salts that are not weak acids or bases are strong electrolytes.
X NH3 is a weak base
X C12H22011 is neutral (not an acid or a base), therefore it a nonelectrolyte
X CH3COOH is a weak acid and it also dissociates partially.
The substance which is a strong electrolyte is Ba(OH)₂.
Hence Option (B) is correct answer.
What is Strong electrolyte ?Strong electrolyte can be defined as the substance that completely dissociates in to ions.
Strong electrolyte (aq) → cation⁺ (aq) + anion⁻ (aq)
Now lets check all options one by one
Option (A): NH₃
NH₃ is a weak base. NH₃ does not completely ionize so it is a weak electrolyte.
Hence it is incorrect option.
Option (B): Ba(OH)₂
Ba(OH)₂ is a strong electrolyte because it dissociates completely in water.
Ba(OH)₂ (aq) → Ba⁺² (aq) + 2OH⁻ (aq)
Hence, it is correct option.
Option (C): C₁₂H₂₂O₁₁
C₁₂H₂₂O₁₁ is a non electrolyte that means it does not dissociate into ions.
Hence, it is incorrect option.
Option (D): CH₃COOH
CH₃COOH is a weak electrolyte due to the presence of lowest number of ions it does not dissociate. It's ionization is very less.
Hence, it is incorrect option.
Thus, from the above conclusion we can say that The substance which is a strong electrolyte is Ba(OH)₂.
Hence Option (B) is correct answer.
Learn more about the Strong electrolyte here: https://brainly.com/question/2285692
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The type of igneous rock which has a large number of cavities
formed by gases escaping from the molten rock is called
The answer would be scoria I believe
if you toward the right of the periodic table is it harder or easier to remove valence electrons?
Answer:
harder
Explanation:
Answer:
The increased distance weakens the nuclear attraction to the outer-most electron, and is easier to remove
Explanation:
Help me ASAP !!!!!!!!!!!
Answer:
What do you need help on
Explanation:
Which is it , if you are right I will give brainliest
Answer:
a
Explanation:
.
In what way is kinetic energy present in a solar oven
Please help!! will give brainliest!! The temperature if the water to the nearest degree:__°C
Answer:
102 degrees, the intervals go by 2
What type of solid contains particles that are jumbled and form no particular
pattern?
A. Crystalline
B. High-pressure
C. High-viscosity
D. Amorphous
Answer: D
Explanation:
Amorphous
Answer:D
Explanation:
took the apec test
The Earth has always been a hospitable haven for life. ture or flase
Answer:
True and false at the same time
Explanation:
It is true that Earth is heaven for life but It's also hell for life because people suffer a lot and so does the Earth. Earth is a hell for life because of all the bullying, criticism, racism, sexism, and homophobic people. Life is a great thing to enjoy but with all the negative things that happened and keep happening in the world, it's a living hell for a life. The only good things are that you can explore and do things you never thought of doing before and you are ale=ways surrounded by people who love you and appreciate you for who you are but it's a 5-50 chance of you getting an opportunity like that.
I'm not a negative person it's just the ways that things are. I hope this answers your question!
Have a nice day! UwU
If the approximate density of 6.5 L of ethanol is 0.79 g/ mL, what is the mass in grams?
Answer:
The answer is 5135 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density = 0.79 g/mL
1 L = 1000 mL
6.5 L = 6500 mL
We have
mass = 0.79 × 6500
We have the final answer as
5135 gHope this helps you
Identify 5 basic examples of Solutions?
Answer:
Coffee
Tea
Juice
Bleach
Salt water
Explanation:
Why sulfur has a smaller radius than phosphorus?
Answer:
the radius of sulfur is smaller than the radius of phosphorous. This is because atomic radius tends to decrease as you go left to right across the periodic table. Because sulfur is farther right than phosphorous is, it has a a smaller radius.
Explanation:
hope this helps :)
to get dry ice to the triple point
PLEASE HELP !!
are we made of star dust? why or why not
Answer: Technically, yes. Are bodies are primarily made of carbon, which is found in pretty much everything. Stars, planets, plants, etc.
Explanation:
The atmospheric pressure on a mountain is 550 mmHg and 1 atm is equal to 760mmHg. What is the pressure in atm? Give your answer to 2 significant figures atm
Write the complete electron configurations with spaces between the sublevels. If you do not format correctly your answers will all be incorrect.
For example:
1a1 2b2 3c3 4d4
The ion configuration for an O-2 ion is (answer)
Answer:
O
2−
:
Explanation:
The atomic number of O=8=number of electrons
Number of electrons in O
2−
are 8+2=10
Electronic configuration will be 1s
2
2s
2
2p
6
(02.01 LC)
What is true of neutrons?
They have no charge and are located inside the nucleus.
They have no charge and are located outside the nucleus.
They are negatively charged and are located inside the nucleus.
They are negatively charged and are located outside the nucleus.
hii if you could help that would be great, if the answer is correct ill mark as brainliest :)))
Answer:
Reactants, Products is the answer i believe
Answer:
reactants, products
Explanation:
A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
#10- ill mark brainliest and give 5 stars if its correct
Answer:
#10 for?
Explanation:
A flask contains the liquids trichloromethane (chloroform) and water. They are separated using a separating funnel, which conclusion can be made from this observation alone?
A. Trichloromethane and water have different relative molecular masses
B. Trichloromethane and water have different boiling points
C. Trichloromethane has a higher density than water
D. Trichloromethane is more volatile than water
E. Trichloromethane and water do not mix
Answer:
A
Explanation:
Based on the observation that trichloromethane (chloroform) and water can be separated using a separating funnel, the conclusion that can be made from this observation alone is:
E. Trichloromethane and water do not mix.
When two substances are immiscible, such as trichloromethane (chloroform) and water, it means that they do not dissolve or form a homogeneous mixture when combined. Instead, they form separate layers within the mixture.
The immiscibility between trichloromethane and water is primarily due to their different polarities and intermolecular forces. Trichloromethane is a nonpolar compound with relatively weak intermolecular forces, while water is a highly polar compound with strong intermolecular forces.
Water is a polar molecule due to its bent shape and the presence of electronegative oxygen atoms that create partial positive and negative charges. Trichloromethane, on the other hand, is a symmetrical molecule with four chlorine atoms surrounding a central carbon atom, resulting in a nonpolar distribution of charge.
The fact that these two substances can be separated using a separating funnel indicates that they are immiscible, meaning they do not mix or dissolve in each other to form a homogeneous solution. Trichloromethane and water have different polarities and intermolecular forces, causing them to form separate layers in the separating funnel.
Learn more about Trichloromethane from the link given below.
https://brainly.com/question/30886030
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What is the source of most of our current knowledge of Mercury's appearance and geology?
Please answer quick !!
A student painted one wall black and one wall white. Which color of paint will most likely appear brighter?
Answer:
white
Explanation:
Hassium belongs to what
block of the periodic table
PLS ANSWER ASAP
Explanation:
Hassium belongs to d-block of the periodic table.
Two students have been researching the atomic theory in preparation for their chemistry test. Melanie stated that Thomson's discovery revolutionized the understanding of an atom more than Rutherford. Josue disagreed with Melanie, he stated Rutherford's discovery revolutionized the understanding of an atom more than Thomson. Which student do you agree with?
Answer:
Josue
Explanation:
J.J Thompson proposed the plum pudding model of the atom. In his proposition, the atom is a sphere of positive charges into which negative charges were embedded. This model of the atom did not significantly contribute to our present day understanding of atomic structure.
On the other hand Ernest Rutherford laid out the foundation for a more accurate understanding of atomic structure in his nuclear model of the atom. According to Rutherford, the atom consists of a positively charged massive core called the nucleus around which electron move in orbits. His idea was akin to the solar system with the sun at it's core and planets moving around the sun in orbits.
This his idea of the nuclear theory was held as fundamentally correct by Neils Bohr's model of the atom. Hence, his nuclear theory of the atom was a significant milestone in our present day understanding of atomic structure.
1 mole of CH4 contains ________molecules
1 mole contains 6.023 *10^23 molecules
Help with homework explain GRADE12 1-3 please
Answer:
1. a) 1.27 mol H₂SO₄
2. b) 19 g KCl
Explanation:
The grass method is an acronym for Given, Required, Application, Solution, Statement.
1. a) Given, 125g H₂SO₄; Required, find the moles H₂SO₄; Application, 125g x molar mass of H₂SO₄, Solution, [tex]125g H2SO4 * \frac{1molH2SO4}{98.08gH2SO4} = 1.274469molH2SO4[/tex] Statement, Round to the lowest number of significant figures to get 1.27 mol H₂SO₄;
2. b) I am only show the equation for this one, but it is basically the same as the previous one. The molar mass of KCl is 74.55 g/mol.
[tex]0.25molKCl*\frac{74.55gKCl}{1molKCl} = 18.6375 gKCl[/tex]
Round to the lowest number of significant figures which is two to get 19 g KCl.
For 3 the unit converter between moles and molecules is 6.022 x 10²³ molecules/mol.
Let me know if you need more help.
What are the fundamental units of mass, length, and temperature in the
metric system? *
Answer:
Kg, meters or centimeters, Celcius