Answer:
2.54mole of H₂
Explanation:
The reaction expression is given as:
2H₂O → 2H₂ + O₂
Given;
Number of moles of H₂O = 2.54moles
Unknown:
Number of moles of H₂ produced = ?
Solution:
To solve this problem, we use the concept of mole comparison. Now from the reaction expression, we know that;
2 mole of H₂O will produce 2 mole of H₂
2.54 mole of H₂O will then produce 2.54mole of H₂
3)
This polar bear lives where it is very cold. Its skin is black and that helps absorb heat. The polar bear also has thick
layers of fat called blubber. What is this blubber used for?
A)
It helps the polar bear swim in the ocean.
B)
It insulates and keeps the polar bear warm.
Females use the fat to feed the baby polar bears.
D)
Only males have fat and it is used to attract a mate.
Answer:
B
Explanation:
The blubber is so thick acts as installation
Answer:
I think the answer is B.
Which of the following is true about chemical reactions?
They are accompanied by changes in energy.
They form new substances with new properties.
both A and B
neither A nor B
Answer:
B : THEY FORM NEW SUBSTANCES WITH NEW PROPERTIES .
Please help I really need but this time I'm fr I don't have much time ill mark brainliest
Answer:
i fi am not wrong the correct answer is D
Explanation:
Answer:
The answer is D
Explanation:
More height= more potential energy
how does light emitted from a neon sign differ from sunlight?
Answer:
Neon emits only a specific color
Explanation:
While sunlight emits all the colors neon light emit a single color
6) Define Hydrogen bonds
A. A force created by differences in electronegativity and the small size of the hydrogen atom
make them especially strong.
B. A force created by similarities in electronegativity and the small size of the hydrogen atom
make them especially strong,
C. Forces created by temporary dipoles that result from the movement of electrons in non-
polar molecules.
D. A force created by differences in electronegativity and the large size of the hydrogen atom
make them especially strong,
E. The force between polar molecules when the opposite partial charges of a molecule exert a
force on each other
Answer:
A hydrogen bond is an intermolecular force (IMF) that forms a special type of dipole-dipole attraction when a hydrogen atom bonded to a strongly electronegative atom exists in the vicinity of another electronegative atom with a lone pair of electrons. Intermolecular forces (IMFs) occur between molecules. Other examples include ordinary dipole-dipole interactions and dispersion forces. Hydrogen bonds are are generally stronger than ordinary dipole-dipole and dispersion forces, but weaker than true covalent and ionic bonds.
Explanation:
if u know that answer i will mark has brainliest
Answer:
The clear liquid is less dense than the black liquid, which is why it floats on top. If the volume were different, you would visually see more clear liquid than black and vice versa.
The clear liquid is less dense than the black liquid
Answer:
A. The clear liquid is less dense than the black liquid
Explanation:
Since the clear liquid since on top of the black one it's density is less. Whatever liquid has a higher density will sink to the bottom of the flask.
In water acids form ___.
A. Hydrogen gas
B. Hydrogen ions
C. Hydrogen atoms
D. Hydroxide ions
Answer:
Hydrogen ions
Explanation: acids will produce hydrogen ions, I asked my teacher. Please tell me if we are wrong.
I dont have heat i have
elecromagnetic,
gravitacianal,
nucler and mechanical which one is it
Answer:
Your answer would be mechanical.
Explanation:
Hope you do good BRAINLYISETTT
Calculate the speed for a car that went a distance of 125
kilometers in 2 hours tiine.
Answer:
62.5 km/hr
Explanation:
Speed can be found by dividing the distance by the time.
s=d/t
We know the car travelled a distance of 125 kilometers in 2 hours. Therefore:
• d=125 km
• t= 2 hr
Substitute the values into the formula.
s= 125 km/ 2 hr
Divide
s= 62.5 km/ hr
The speed of the car is 62.5 kilometers per hour.
39 which statement about the process of dissolving is TRUE
A. Dissolving releases energy in the form of heat.
B. Solvent can be dissolved faster when stirring is applied.
C. Applying heat often speeds up the process of dissolving particles.
D. Once a solute, such as salt crystal is dissolved in a solvent such as
water, it can never return to its original crystal state.
According to the concept of solubility,applying heat often speeds up the process of dissolving particles.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
Learn more about solubility,here:
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Which pair has identical electron configurations?
S2- and CI
K+ and CI1-
S and Ar
Cl1- and K
Identical electron configurations : K⁺ and Cl⁻
Further explanationIn an atom, there are levels of energy in the shell and sub-shell
This energy level is expressed in the form of electron configurations.
Charging electrons in the sub-shell uses the following sequence:
1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.
S²⁻ and CIS²⁻ : [Ne] 3s²3p⁶
Cl : [Ne] 3s²3p⁵
K⁺ and CI⁻K⁺ : 1s² 2s² 2p⁶ 3s² 3p⁶
Cl⁻ : 1s² 2s² 2p⁶ 3s²3p⁶
S and ArS :[Ne] 3s²3p⁴
Ar : [Ne] 3s²3p⁶
Cl⁻ and KCl⁻ : 1s² 2s² 2p⁶ 3s²3p⁶
K : 1s² 2s² 2p⁶ 3s² 3p⁶4s¹
Arrange the following elements in order from lowest to highest first ionization energy : AI , Ar, Cs, Na .
Answer:francium
The first ionization energy varies in a predictable way across the periodic table. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.
Explanation:
The least measure of the energy needed to remove the loosely bound electron of an atom or a molecule is called ionization energy.
The correct order from lowest to highest first ionization energy is:
CsNaAlArThis can be explained as:
(Cs) Caesium will have the lowest energy because in the periodic table it comes in the same group as (Na) sodium. In the group, from top to bottom the ionization energy decreases.(Al) aluminium and (Ar) argon lies in the same period.In a period from left to right the ionization energy increases.Therefore, Cesium will have the least ionization energy as compared to sodium, aluminium and argon.
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Which is greater 50 degree celcius or 50 degree fahrenheit?with solution plz.....
Answer: 50 degrees Celsius is hotter than 50 degrees F. 50 degrees Celsius is half way between freezing and boiling
What is the name of the following chemical compound?
Answer:
Lead(IV) iodide
Explanation:
Answer:
Plasmid #50548
Explanation:
Which of the following colors is/are produced when white light from sun is passed through a prism?
Answer:
Options d.
Explanation:
As white light from the sun is passed through a prism, it is separated into colors - red, violet, yellow, blue, green, orange, and indigo.
Dispersion is the process of the separation of visible light into its different component colors. The light waves are refracted as they enter the prism.
So, option d. is correct.
___CO----> ___C+___O2
what's the answer?!!
Answer:
2CO >>> 2C + O2
........
Kate wrote the steps of the carbon cycle to describe how carbon is cycled through specific organisms. The steps are in random order.
1 - The rabbit decomposes.
2 - The rabbit eats the carrot plant.
3 - The carrot plant takes in carbon dioxide from the air during photosynthesis.
4 - Carbon compounds are returned to the soil.
Which lists the steps in order?
2, 3, 1, 4
3, 2, 1, 4
3, 4, 2, 1
2, 4, 3, 1
3, 2, 1, 4
Further explanation:The process of photosynthesis is the process of converting carbon dioxide and water into energy in the form of carbohydrates using sunlight. Usually done by plants that have leafy za called chlorophyll.
Carbohydrates themselves are formed from the C-carbon, H-hydrogen and O-oxygen components
Rabbit food is carrots that contain carbohydrates, which are part of the photosynthesis process
3. The carrot plant takes in carbon dioxide from the air during photosynthesis.
Reaction
6CO₂ + 6H₂O ⇒ C₆H₁₂O₆ + 6O₂
2. The rabbit eats the carrot plant.
Rabbits meet their carbohydrate source for energy by eating carrots
1. The rabbit decomposes.
Rabbits in time will experience a process of decomposition
4 - Carbon compounds are returned to the soil.
The carbon content in rabbits will also be decomposed into the soil again
Answer:
3,2,1,4
Explanation:
2 The polar structure of water allows it to act as a solvent for many substances. Which of the
following statements best explains why water is considered polar?
F The unequal sharing of electrons results in the water molecule having a slightly negative
charge near its oxygen atoms and a slightly positive charge near its hydrogen atom.
G The equal sharing of electrons by the hydrogen and oxygen atoms form weak bonds that are
easily broken during dissociation.
H The unequal sharing of electrons results in the water molecule having a slightly positive
charge near its oxygen atoms and a slightly negative charge near its hydrogen atom.
The equal sharing of electrons by the hydrogen and oxygen atoms create a molecule that is
neutrally charged
Answer:
Explanation:
How many grams of calcium are in 2.65 g of CaCO3?
Answer:
2.56
Explanation:
Jones Soda contains 33g added sugar (C6H12O6) in a 355 ml bottle, while Sierra Mist contains 62g added sugar in a 591 ml bottle. Which beverage is more concentrated (has a higher molarity) for sugar?
Sierra Mist
Jones Soda
C6H12O6 molar mass: 180.15768 g
solute: sugar
molarity = moles of solute / liters of solution
Jones Soda:
33 g / 180.15768 g = 0.18 moles C6H12O6
M = 0.18 g / 0.355 L
M = 0.52
Sierra Mist:
62 g / 180.15768 g = 0.34 moles C6H12O6
M = 0.34 g / 0.591 L
M = 0.58
Sienna Mist has a higher molarity and is more concentrated.
Why are iron nails attracted to magnets, but not attracted to other iron nails?
plzzzz help ASAP !!!!
Answer:
sorry can't
Explanation:
Answer:
Try to get a solution from Google
balancing equations help!!
if freshwater is added to a region, what happens to seawater density and salinity?
Answer:
The density and salinity goes down.
Explanation:
Salt water is denser than pure water. As fresh water is added to salt water the concentration of salt goes down. Since salinity is the amount of salt in the water that would go down with the concentration. This would also mean that the density goes down since there is less salt per unit of volume which makes it so that there is less mass per unit of volume. The formula for density is d=m/v so as the mass goes down per unit of volume so does the density.
Let me know if anything is unclear in the comments and we can try to work through it.
1. Which pair of atoms will share electrons when a bond is formed between them? Explain why.
A. K and Cl B. Li and I C. Br and Cl D. Ba and I
Answer:
C. Br and Cl
Explanation:
When Br and Cl combines they share electrons between them to form a type of bond called covalent bond.
The sharing of electrons between two atomic species is covalent bond. It usually occurs between two atoms with a low electronegativity difference among them. Br and Cl have low electronegativity difference. Also, the bond forms between non-metalsOnly Br and Cl pair are the non-metals from the given choices.Taking into account the definition of ionic and covalent bonds, the pair of atoms Br and Cl will share electrons when a bond is formed between them.
Ionic bondAn ionic bond is a type of chemical bond that occurs when one atom gives up an electron to the other, in order for both to achieve electronic stability.
This union normally occurs between metal and nonmetal elements with different electronegativity, which means that the elements have different capacity to attract electrons.
In other words, an ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.
Covalent bondOn the other side, the covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule.
Covalent bonds are established between non-metallic elements, such as hydrogen H, oxygen O and chlorine Cl. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas. The shared electron pair is common to the two atoms and holds them together.
This caseIn this case, considering that K, Li and Ba are metallic atoms and Cl, I and Br are non-metallic atoms, the pair of atoms Br and Cl will share electrons when a bond is formed between them.
Learn more:
brainly.com/question/5394701?referrer=searchResultsbrainly.com/question/12144907?referrer=searchResultsbrainly.com/question/14614895?referrer=searchResults brainly.com/question/24755818?referrer=searchResults brainly.com/question/24776745?referrer=searchResultswhat element has the same number valence electrons as strontium?
Answer:
Beryllium
Explanation:
They are in the same group
Electromagnetic radiation at its maximum wavelength is _____.
A. Radio waves
B. Infrared
C. X rays
D. None of the above
Answer:
Option A) Radio waves.
Explanation:
Have a great day.
I will give you Brainly if you awser correct if your gonna awser for points pl put I don’t know
Answer:
C
Explanation:
What is the volume of 80.0 g of ether if the density is 0.70 g/ml
5. True or False: A growth rate can be only positive and negative, it can never be zero.....
A. True
B. False
Answer:
True
Explanation: