Answers
Answer:
HERE
Explanation:
Question:
Does anyone know if this is positive,negative or neutral?
Answer:
Netarual
Explanation:
I but the Images down below
Related Questions
HELLP ME PLSSS
The passing of heat through a material is called ________.
A. vibration
B. conduction
C. radiation
D. convectio
Answers
Answer:
B
Explanation:
conduction is the transfer of heat between objects that touch
The lattice-like structure of a metal consists of negative metal ions in a "sea" of electrons.
O True
O False
Answers
Answer:
True
Explanation:
True or False When one side of a molecule is electronegative (δ-) and the other side of the
molecule is electropositive (δ+), it is said to have a dipole moment. Water has
a dipole moment.
Answers
Answer:
True; When one side of a molecule is electronegative (δ-) and the other side of the
molecule is electropositive (δ+), it is said to have a dipole moment.
Explanation:
A dipole moment exists in a molecule as a result of differences in the electronegativity values between the atoms of the elements involved in the chemical bonding.
When a strogly electronegative atom such as oxygen or chlorine is chemically bonded to a less electronegative or an electropositive atom such as hydrogen, there is an uneven sharing of the electrons involved in the bonding. The more electronegative atoms tends to draw the shared electrons mostly to themselves. This induces a partially negative charge (δ-) on them while leaving the electropositive atoms with a partially positive charge (δ+).
Water is an example of a molecule having a dipole moment. The oxygen atoms are more electronegative than hydrogen and as such draw the shared electrons to themselves more, inducing a partial positive charge (δ+) on the hydrogen atoms while they themselves develop a partial negative charge (δ-).
How is water important to many branches of science?
Answers
Answer:
Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This is important to every living thing on earth.
Can someone plss help me answer those 4 questions by tonight.Thank you !
Answers
Answer:
no problem hey I will help you
Uranium is an element with three naturally occurring isotopes: 238U, 235U, and 234U. This means that 238U, which has a mass number of 238 has _______more than 235 u which has a mass number of 235.
Answers
Answer:
The correct answer is - neutrons.
Explanation:
Uranium has various isotopes found naturally that are three 238U, 235U, and 234U. Uranium has an atomic number of 92 which means there are 92 protons and 92 electrons in the atomic structure.
Isotopes have the same number of protons but a different number of neutrons that can vary from 141 to 146. U-238 has 146 neutrons in the nucleus, whereas 235 U has 143 neutrons.
The U- 238 has more neutrons than U- 235. Atomic mass is the sum total of the nucleons or protons and neutrons.
What are Isotopes?
They are the different variants of the same molecules which have the same number of protons but the different number of neutrons.
Atomic mass is the sum total of the nucleons or protons and neutrons. The atomic number of Uranium is 92, the rest of the mass comes from neutrons.
Therefore, the U- 238 has more neutrons than U- 235.
Learn more about Isotopes:
https://brainly.com/question/9099776
what is chemical name of ghee
Answers
Answer. Chemical formula of ghee: (C17H33 Coo)3 C3H5 • Chemical Reaction: (C17H31Coo)3 C3H5 + 3H2 (C17H33 Coo)3 C3H5
Describe the differences between a geocentric model and heliocentric model. What model is the current Sun-Earth-Moon System based on?
Answers
Answer:
Geocentric is a description that says all objects, including the moon, sun and stars orbit around the Earth.
Heliocentric is a description that says all objects including the moon, Earth and stars revolve around the sun.
Most textbooks would tell you that the current system is heliocentric.
Can you tell me any chemical reaction that occur due to kinetic energy
Answers
Answer:
The molecules in gasoline (octane, the chemical formula shown) contain chemical energy. This energy is transformed into kinetic energy that allows a car to race on a racetrack.
Consumers must eat other organisms
for energy. Which organisms
are consumers in this food chain?
Answers
Answer:
frog-snake+-Eagle
Explanation:
___&&&-(_(-7&&((-&(_((-_(_-8&:"&&7+_&(&_
For 2-methylbutane, the AH° of vaporization is 25.22 kJ/mol and the
AS° of vaporization is 84.48 J/mol K. At 1.00 atm and 201 K, what is
the AG° of vaporization for 2-methylbutane, in kJ/mol?
Answers
Answer:
ΔG° = ΔH° - TΔS°
ΔG° = 25.22-(201 )(0.08448)
ΔG° = 8.24 kJ/mol
The standard free energy is obtained as 8.2 kJ/mol.
We know that; ΔG° = ΔH° - TΔS° where;
ΔG° = standard free energy
ΔH° = standard enthalpy
T = temperature
ΔS° = standard entropy
Hence substituting the values;
ΔG° =25.22 kJ/mol - (201 K * 84.48 J/mol K)
ΔG° = 25.22 * 10^3 J/mol - 16980.5 J/mol
ΔG° = 8.2 kJ/mol
Learn more about free energy: https://brainly.com/question/1301963
7. What is the mass of a piece of copper (Cu) that undergoes a 25.0 °C
temperature change with the loss of 428 J of energy?
Answers
Answer:
0.0428 kg or 42.8 g
Explanation:
Applying,
Q = cmΔt.............. Equation 1
Where Q = heat lost of heat gained, c = specific heat capacity of copper, m = mass of copper, Δt = temperature change.
make m the subject of the equation above
m = Q/cΔt.................. Equation 2
From the question,
Given: Q = 428 J, Δt = 25 °C
Constant: c = 400 J/kg.°C
Substitute these values into equation 2
m = 428/(25×400)
m = 0.0428 kg
m = 42.8 g
You can find the speed on a distance-versus-time graph by finding the slope of the line.
True
False
Answers
PLSSS HELP ME THIS IS FOR SIENCE PLLLLSSSSS
The passing of heat through a material is called ________.
A. vibration
B. conduction
C. radiation
D. convection
Answers
Answer:
Conduction
Explanation:
I took the course
Answer:
B. conduction
When does phenolphthalein turn pink?
in the presence of a base
in the presence of an acid
when it is in a neutral solution
when it is reacting with a metal
Answers
Answer:
A. In the Presense of a base
Explanation:
Just took the test from Edgunuity
Phenolphthalein turns pink in color in the presence of a base. Therefore, option A is correct.
What is phenolphthalein and its use?Phenolphthalein is a chemical compound that is often used as an acid-base indicator. It is colorless in acidic solutions and pink or red in basic solutions.
Phenolphthalein is often used in titrations to determine the endpoint of a reaction between an acid and a base. It can also be used as a laxative or in forensic investigations to test for the presence of blood.
Phenolphthalein has a chemical formula of C₂₀H₁₄O₄ and is synthesized by reacting phthalic anhydride with phenol in the presence of a strong acid catalyst. It is also used as a pH indicator. phenolphthalein has been found to have potential health benefits, such as reducing the risk of cancer, improving digestion, and reducing inflammation. Therefore, option A is correct.
Learn more about phenolphthalein, here:
https://brainly.com/question/15211751
#SPJ5
PLEASE NO BOTS lol
Ethyne or acetylene is also used in cutting torches. The acetylene is combined with pure oxygen producing a flame with a temperature of 6332 °F or 3500 °C. The combustion of acetylene in the presence of excess oxygen yields carbon dioxide and water:
2C2H2 (g) + 5O2 (g) --> 4CO2 (g) + 2H2O (l)
Calculate the value of ΔS° for this reaction.
A. +689.3 J/mol K
B. +432.4 J/mol K
C. -432.4 J/mol K
D. -122.3 J/mol K
Answers
The correct answer is
C. -432.4 J/mol K
A quantity of gas was cooled from 323 K to 273 K. Express this temperature
difference in degrees Celsius and Kelvins. What do these temperatures
represent about the gas particles? Which temperature scale is a more accurate
depiction of this representation? Explain briefly.
Answers
Answer:
give more details
Explanation:
The primary structure of a protein is determined by
A. The order of amino acids in the protein.
B. The amino acid composition.
C. The hydrogen bonding that gives the protein three dimensional shape.
D. The intertwining of protein molecules to form a “functional” protein.
Answers
Answer: I believe the answer is A. The order of amino acids in the protein.
Explanation:
................................................................
Answers
Answer:
..............,.,.,.,,..,,.,.,
Select the correct answer.
Your friend Keith has been in a dating relationship for six months. His personality has changed in these months. He looks unhappy and rarely smiles. He avoids the company of friends. On the rare occasions you have seen him, his face appears bruised. You suspect that Keith may be in an abusive relationship. What should you do in this case?
A.
avoid talking to Keith
B.
confront his dating partner
C.
encourage Keith to speak up and report abuse
D.
advise him to tolerate the abuse, as difficulties are a part of life
Answers
Which example is the site of oxidation when the dry cell is operating?
solid zinc layer
cardboard separator
graphite rod
paste
Answers
A dry cell is one type of electric battery which is generally used for the home and portable electronic devices. A battery is a device which consists of one or more electrochemical cells. The site of oxidation occurs in solid zinc layer. The correct option is A.
What is a dry cell?A dry cell is defined as an electrochemical cell which consists of low moisture immobilized electrolytes in the form of a paste which restricts it from flowing. It is developed by the German scientist Carl Gassner which converts chemical energy into electrical energy.
A dry cell consists of a metal container in which a low moisture electrolyte paste covers the graphite rod or a metal electrode. Generally, the metal container will be zinc whose base perform as the negative electrode (anode).
For a dry cell battery to operate, oxidation will occur from the zinc anode and reduction will take place in the cathode.
Thus the correct option is A.
To know more about dry cell, visit;
https://brainly.com/question/13780178
#SPJ2
what will the sun become when it dies
Answers
Answer:
It will become a red giant
Explanation:
When the sun runs out of its hydrogen fuel and the hydrogen atoms are combined together to make helium atoms, it expands into a red giant, which is made up of helium atoms and gases.
A student is trying to develop questions to help identify an unknown biome. Which of the following questions would provide helpful information to identify an unknown biome? Select ALL that apply. A. Is sunlight an abiotic factor in this biome? B. What is the average temperature of this biome? C. How much precipitation does this biome receive each year? D. What adaptations do plants and animals have to survive in this biome? E. Is the biome located near an ocean? F. Do plants and animals live in this biome? G. Does carbon cycle in this biome?
Answers
Answer:
I think the answer is C. D. And F.
Explanation:
I’m sorry if I’m wrong :(
Answer:
I think the answer is BCD and maybe F
Explanation:
What is my formula? Silver l acetate
Answers
Answer:
Ag(I)C2H3O2 ....................
Silver only has a single valence value (+1) so you really don't need to put the (I) in the chemical formula.
Which is/are used in nuclear reactors to absorb neutrons?
A. heavy nuclei
B. critical mass
C. chain reactions
D. control rods
Answers
Answer:
A. heavy nuclei
Explanation:
They absorb neuyrons in order to hain stability.
By absorbing neutrons, a control rod prevents the neutrons from causing further fissions.
what mix of chemicles gives fireworks thier color: explain for each color
Answers
Answer:
Metal salts commonly used in firework displays include: strontium carbonate (red fireworks), calcium chloride (orange fireworks), sodium nitrate (yellow fireworks), barium chloride (green fireworks) and copper chloride (blue fireworks).
Explanation:
Answer:
Metal salts commonly used in firework displays include: strontium carbonate (red fireworks), calcium chloride (orange fireworks), sodium nitrate (yellow fireworks), barium chloride (green fireworks) and copper chloride (blue fireworks).
The colors are produced by heating metal salts, such as calcium chloride or sodium nitrate, that emit characteristic colors. ... Barium – Barium is used to create green colors in fireworks, and it can also help stabilize other volatile elements. Calcium – Calcium is used to deepen firework colors
differences between geometric isomerism and optical isomerism?
Answers
Geometric isomers have the same structural formulas but differ in the arrangement of groups at a single atom, at double bonds, or in rings. ... One of the optical isomers rotates the light in one direction, the other rotates the light in the opposite direction but by the same amount.
Cómo escribir el símbolo Theta
Answers
A gas has a pressure of 1.5 atm at 100K. If the pressure changes to 6 atm, what is the new temperature be?
Answers
Answer:
400k
Explanation:
volume is constant
P1/T1=P2/T2
1.5/100=6/T2
T2=(100×6)/1.5
T2=400k
Which of the following are reasons the ocean marine biomes are a challenging place for organisms to live? Choose all that apply.
Question 13 options:
some areas are extremely dark and deep
high waves can be rough and powerful
all of the organisms have to live without sunlight
organisms have to be able to live in extremely salty conditions
Answers
In an ecosystem, the reason that ocean marine biomes are a challenging place for organisms to live because they have to be able to live in extremely salty conditions.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
https://brainly.com/question/13979184
#SPJ3