Answer:
Yes oxygen is more reactive than beryllium
Elemental beryllium is very unreactive towards air and water, even at high temperatures.
I'm having trouble balancing these. Can you help me
Answer:
Oh Okay
I hope u have a better rest of ur day
Percentage of isotopes in 35/17 Cl and 37/17 Cl
Explanation:
Average atomic mass of Chlorine = 35.45 amu
The percentage of isotopes is the percentage abundance.
This is given by;
Average atomic mass = (Mass of isotope * Percentage abundance of 35/17 Cl) + (Mass of isotope * Percentage abundance 37/17 Cl)
Let percentage abundance of 35/17 Cl = x
Then percentage abundance of 37/17 Cl = 1 - x
Putting the values in the equation;
35.45 = (35 * x) + (37 * (1-x))
35.45 = 35x + 37 - 37x
35.45 - 37 = 35x - 37x
- 1.55 = -2x
x = 1.55 / 2 = 0.775
Percentage abundance of 35/17 Cl = 0.775 * 100 = 77.5%
Percentage abundance of 37/17 Cl = (1 - 0.775) * 100 = 22.5%
Name the following compound: KI
Explanation:
--KI:Potassium iodide
please help need 18-20 answer
Answer:
800 ml
marbel
flow
Explanation:
Hydrochloric acid (HCI) breaks down into hydrogen gas and chlorine gas according to the reaction:
2 HCI — Cl2 + H2
If 42 grams of HCl reacts, what is the theoretical yield of hydrogen gas produced?
A) 2.32 g
B) 737 g
C) 0.57 g
D) 1.16 g
Answer:
(D)=1.16g
Explanation:
Answer:
D) 1.16 g
I'm not sure about answer ..
What is the sum of kinetic energy and potential energy?
Answer:
Potential energy is stored energy. An object has a measurable amount of potential energy depending on where it’s located and how it relates to other objects around it — the energy of position.[1]
An apple on the floor has very little potential energy. Lift it to the top of a skyscraper, and suddenly it has a lot of potential energy. It can fall to the ground under the force of gravity. It can also interact with other objects on its descent, such as striking a flying bird or landing on a car roof and damaging it.
When the apple is descending, its potential energy has become kinetic energy, which is the energy of motion. Kinetic energy is the energy a person or an object has due to its motion — in this example, the falling apple. A parked bike on top of a hill has potential energy, which becomes kinetic energy once you start riding it downhill.
Both of these energies are measured in joules. Energy is never destroyed or lost when changing from potential energy to kinetic energy — it is merely transformed from one energy type to another. This is known as the law of conservation of energy.[2]
The potential energy of an object cannot be transferred to another entity – you cannot suck the potential energy out of the apple atop a skyscraper. Kinetic energy is transferable, as witnessed with the falling apple’s kinetic energy damaging a car or hitting a bird.
What Is the Relationship Between Potential and Kinetic Energy?
Relationship Potential and Kinetic Energy explained | Waterfall energy image
The relationship between potential energy and kinetic energy is that potential energy can transform into kinetic energy.
Potential energy is position relative. In other words, it changes depending on an object’s height or distance and the mass of the object. Kinetic energy changes depending on an object’s speed and its mass.
If we think about a waterfall, some still water at the top of the waterfall has potential energy. It isn’t moving and hasn’t gone over the edge. The water flowing from the waterfall has kinetic energy as it flows.[3]
A pendulum is an excellent example of this relationship. As the pendulum swings ever higher upwards, its potential energy increases until it reaches its optimum at the highest point of the swing. At the top of the arc, the potential energy turns into kinetic energy as it swings back down.[4]
What Are Examples of Potential Energy?
There are two primary types of potential energy: gravitational potential energy and elastic potential energy.
The gravitational force of the Earth causes gravitational potential energy. When a person jumps from a high dive board, they land with much force (and a splash) into the swimming pool below.
The Earth’s gravity uses the diver’s gravitational force (their weight) to produce the kinetic energy (movement) that brings the diver into the pool. At the top of the diving board, we can talk about the diver’s gravitational potential energy.
This is the same for apples on trees, bikes on top of a hill, a roller coaster waiting to descend, and a skydiver in a plane — all examples of the potential to do an amount of work.[5]
Elastic potential energy occurs when you stretch or compress something. A rubber band left on a sideboard has little potential energy. If you pick it up and stretch it, you have increased its potential to do some work.
If you release the rubber band, it may fly across the room or scare the cat. You manipulated the rubber band to increase its potential energy, which was then released as kinetic energy as it traveled (motion) across the room. An archer pulling back a bow and coiling a spring are further examples of potential energy.[6]
Are monomers saturated?
Answer:
vwi AC wjkw Jew hill to a friend about our services to our terms of this website are not responsible for all your hard disk space and the rest is just the same time the page you are not logged into the air and the other
What do the arrows in the circle indicate
Which pair could be genetic clones?
look at the photo
Answer:
cow female
Explanation:
The outpost structure of the bacteria cell is the.
Which of the following summaries expresses the main points of the passage best?
I believe gravity is the most important aspect of our universe. Without it we would all be floating off
into the universe. There wouldn't be any orbits; instead, all planetary bodies would simply float
around, running into each other when they crossed paths and just wandering forever.
There is a gravitational force between all objects in the universe. Gravitational force is what keeps all
components of our solar system in orbit around the Sun, as well as moons in orbit around planets. The
force of gravity affects Earth's tides and holds us on Earth's surface. The force of gravity between
objects depends on their masses and the distance between them.
Gravity is hard to understand and scientists have little to no understanding of how it works. We know
that gravity is out there, but the specifics are often lost on us. Plants, animals, and humans are all able
to grow tall due to the pull on Earth from the Sun. Without the Sun we would all just stretch out along
Earth's surface
None of the above
Answer:B
Explanation:
The summary which expresses the main points of the Gravitational force best is the second one.
What is gravitational force?Gravitational force is a attraction force which is present between two objects and represented as:
F = gm₁m₂ / r², where
g = gravitational constant
m₁ = mass of one object
m₂ = mass of another object
r = distance between two objects
Because of gravity all objects will have a accurate position and particular order.
Hence second paragraph expresses best.
To know more about gravitational force, visit the below link:
https://brainly.com/question/19050897
Given the following equation: 2C6H6 + 15O2 - 12CO2 + 6H2O
How many moles of O2 are needed to react with 4.0 moles of
C6H6?
A. 30 Moles
B. 12 moles
C. 4.0 moles
D. 24 moles
Answer: 30 moles
Explanation:
2C6H6 + 1502 -------> 12CO2 + 6H2O from reaction
2 mol 15 molgiven 4.0 mol
x molx = 4.0*15/2 = 30. mol
what happens when a copper vessel is exposed to moist air for long? please answer fast
N203
Name the mixed compound (chemical and common names)
Answer:
N203 is a chemical compound some chemical names for N203 are Nitrogen trioxide. It is aka Dinitrogen trioxide, or nitrogen sesquioxide.
Explanation:
I searched it up
can I pls get a brainliest?
:) :) :) :) :) :) :) :) :) :) :)
how do I balance these
1. Which of these is a chemical property? *
a) oxygen is a gas at 25 degree Celsius. b) helium is very nonreactive. c) ice melt at 0 degree Celsius. d) sodium is a soft, shiny metal.
according to periodic trends which element would have more valence electrons than sulfur
Answer:
Chlorine,Argon
Explanation:
All the elements of group 18 and group 17
The periodic table depicts the various elements arranged based on the increasing order of their atomic numbers. Argon and chlorine will have more valence electrons than sulfur.
What is the periodic trend of valence electrons?A valence electron is an electron of an atom present in the outermost shell that participates in bond formation. The valence electrons are the same in elements placed in the same group or family.
The number of valence electrons increases in a horizontal row called the period of the periodic table. As when one moves from left to right in a period the valence electron increases.
The number of valence electrons in a sulfur atom is 6, whereas in chlorine is 7 and in argon is 8. As chlorine and argon are placed after sulfur in a period will have more valence electrons.
Therefore, argon and chlorine have more valence electron than sulfur.
Learn more about the trend of valence electrons here:
https://brainly.com/question/15098014
#SPJ6
What are water and carbon dioxide converted into by the end of
photosynthesis? *
air and sunlight
water and air
sugar and water
sugar and oxygen
Answer:In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. ... In cellular respiration, oxygen is used to break down glucose, releasing chemical energy and heat in the process. Carbon dioxide and water are products of this reaction.
Explanation:
Which of the following is
needed to determine velocity?
A) Direction only
B) Direction & time
C) Distance & direction
D) Distance, time and direction
Direction only
Direction & time
Distance & Direction
O Distance, time and direction
Answer:
distance and time are needed to find velocity
Need Help Please ♂️
Answer:
Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include the elements iron, nickel, and cobalt, and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone.
Gravitational force is is a force that attracts two objects with mass. We call the gravitational force attractive because it always tries to pull masses together, it never pushes them apart. Every object, including you, is pulling on every other object in the entire universe!
An example of gravitational force in the real world is the force that holds the gases in the sun. The force that causes a ball you throw in the air to come down again. The force that keeps the Earth and all of the planets in line in the proper position in their orbits around the sun.
Which is an inequality?
A. 1 <4
C. 2 = 1 + 1
O D. 3
Explanation:
step 1. an inequality has either a <, <=, >=, or a >.
step 2. 1 < 4 is an inequality.
step 3. the answer is A.
What is the molecular formula of a compound with an empirical formula of CH and a molecular mass of 78 amu?
Answer:
Answer is 1
Explanation:
It took 25 seconds for a horse to complete a 400 meter race. What was the speed of the horse?
Answer:
v = 16 m/s
Explanation:
Given that,
Distance, d = 400 m
Time taken, t = 25 s
We need to find the speed of the horse. Speed is equal to distance covered divided by time taken. So,
[tex]v=\dfrac{d}{t}\\\\v=\dfrac{400\ m}{25\ s}\\\\v=16\ m/s[/tex]
So, the speed of the horse is 16 m/s.
Which group in the periodic table contains the lightest ferromagnetic element?
Question 12 options:
A)
Group 9
B)
Group 8
C)
Group 10
D)
Group 7
The answer is B) Group 8 .
Na2O + H2O => NaOH *
Your answer
Balancing equations only the coefficient ratios
Answer:
1, 1, 2
Explanation:
You need to have the same amount of atoms of everything element on both the products and reactants side
Reactants:
Na=2
O=2
H=2
Products:
Na=2
O=2
H=2
Why does oxygen have a higher electronegativity compared to chlorine?
Answer:
The electronegativity of fluorine compare to the electronegativity of oxygen and chlorine as below
Explanation:
Fluorine has the highest electronegativity than oxygen, and chlorine.
Explanation
Generally the electronegativity increase across the period ( from the left to the right) and decreases down the group.
Both oxygen and fluorine are in period 2 in periodic table. since fluorine is on fur right side as compared to oxygen , fluorine has higher electronegativity than oxygen.
On the other side Fluorine and chlorine are in the same group in periodic table. fluorine is at the top of the group while chlorine is at the bottom therefore fluorine has higher electronegativity than chlorine.
PLS ANSWER THIS FOR ME ILL GIVE BRAINLIEST
ok so pls watch episode 18 (Eureka Videos is the channel) and then answer all these
When molecules evaporate they are gaining enough _______ to break the forces of __________ holding them together. This might be compared to the popping of popcorn.
Why can't we see the vapour molecules that have escaped?.
How does increasing the heat affect the rate of molecules popping out into the vapour state?
The colder molecules get, the _________ they move
a rigid metal container has a volume of 20.0 L with nitrogen gas to a pressure of 197atm at 28.0 C. How many moles of gas are present in the container
Answer:
i wish i knew sorry
Explanation:
What do you call a rock that cooled rapidly outside a
volcano?
Explanation:
intrusive rocks.....
.
Use the following equation to answer the questions below.
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)
1. What type of reaction is this? Why do you say it is this type of reaction? Support your claim with evidence. (2 points, 1 point valid type of reaction, 1 point valid evidence)
2. What is the mole ratio of methane to water in the reaction? (1 point correct mole ratio)
3. How many moles of water are produced from the reaction of 50.0g of methane (CH4)? Show your work (2 points, 1 point valid answer, 1 point valid work)
Answer:
1-Double replacement
Explanation:
