Answer:
[Y₂] = 31.25M
Explanation:
Based on the chemical reaction:
2X(g) + Y2(g) ⇌ 2XY(s)
We must define the equilibrium constant, K as:
K = 20 = 1 / [X]²[Y₂]
Where [X] and [Y₂] are the equilibrium concentrations of each gas.
If [X] = 4.0x10⁻²M:
20 = 1 / [4.0x10⁻²M]²[Y₂]
0.032 = 1 / [Y₂]
[Y₂] = 31.25M. A skydiver jumps from an airplane and opens his parachute. At some point during his fall, the downward force of gravity on the skydiver is equal to the upward force of drag on the parachute. Which of the following best describes the skydiver's motion at this point? The skydiver is gaining speed downward. The skydiver is moving at a constant speed. The skydiver is decreasing in speed.
The upward drag and downward force is equal for the skydiver when he jumps down from the plane. Thus, he experiences a constant speed through out his motion.
What is gravitational force?Gravitational force is a kind of force by which a body attracts other objects into its center of mass. Force exerted by the body depends on the mass and distance to it.
Earth pull every objects into its surface by gravitational fore of attraction. For moving body the the gravitational force acting downward have an acceleration due to gravity.
The skydiver experiences a force upward by the drag of a the parachute. When this force becomes equal to the downward fore of gravity, then his speed will be constant thus, no gain or lose for speed.
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Which of the following best describe the charge of an electron?
a. electrons have a negative charge
b. lectrons have a positive charge
c. electrons have no charge
Answer:
C
Explanation:
Because together all of the electrons create a negative charge.That balances the positive charge of the protons in the atomic nucleus.
Which best explains why the atomic theory is a scientific one?
A. The theory was written by a famous scientist and has been around
for a very long time.
B. The theory describes what atoms are and has not changed over
time.
C. The theory explains many observations and is supported by a
large amount of evidence.
D. The theory represents a guess by many different scientists about
how atoms work.
Answer:
C
Explanation:
Answer:
it will option c it is perfect
what is tetra atomic molecules?
Answer:
Explanation:
They are the molecules that are formed when four atoms chemically bond together.
What are the coefficients when the following equation is correctly balanced? _____ Al + _____O2 ---> _____Al2O3
pls helpppp
Is the law of conservation of mass observed in each equation?
1. 2KClO3=2KCl+3O2
2. CaCO3+2HCl=CaCl2+H2O+CO2
Answer:
its c my guy
Explanation:
Question 4
TRUE or FALSE?
The particles in a solid have NO kinetic energy (they do not move).
True
False
Answer: True
Explanation:
Particles vibrate in place but do not move.
Which of the following correctly lists the levels of organization from most complex to least complex? *
Community, Organism, Population, Ecosystem
Ecosystem, Community, Population, Organism
Population, Community, Ecosystem, Organism
Organism, Population, Community, Ecosystem
Answer:
The last option.
Explanation:
You can immediately eliminate the other options as an organism is clearly the least complex. Only one option begins w/ 'organism'.
Answer:
Its def A, if this helped subscribe to amiredagoat Yt
Explanation:
Order the following atoms from smallest to largest atomic radius: C, N, P
Answer:
N ∠ C ∠ P
Explanation:
Atomic radius:
It is define as the distance from nucleus of an atom the outer most electronic shell.
As we move down the group atomic radii increased because of increase of atomic number. Electrons are added in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.
When we move from left to right across the periodic table electron are added in the same shell at the same time protons are also added in the nucleus hence positive charge is going to increase and this effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus and atomic radii decreases.
Carbon and nitrogen are present in period 2 while phosphorus is present in period 3 thus phosphorus has largest atomic radii. Carbon and nitrogen are present in same period but nitrogen is more right as compared to the carbon which means nitrogen has one more valence electron thus its size is smaller than carbon.
Values of atomic radii.
P = 98pm
C = 67pm
N = 65 pm
N ∠ C ∠ P
it takes a slug 20 minutes to travel from the grass to the trash can a trip of 15 meters. how far could the slug travel in 60 minutes
Answer:
45 meters
Explanation:
Did the math
2.
As products are formed in the reaction
NH4Cl(s) + 3.5 kcal
H2O
NH4+(aq) + Cl (aq),
the entropy of the system
(1) decreases and heat is absorbed
(2) decreases and heat is released
(3) increases and heat is absorbed
(4) increases and heat is released
The entropy of the system increases and heat is absorbed in this chemical reaction.
What happen when NH4Cl reacts with water?When ammonium chloride NH4Cl reacts with water, it absorb energy for the surrounding and decomposes into its component ions such as NH4+ and Cl- so we can conclude that increases occur in the entropy of the system and heat is absorbed.
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Which is caused by the refraction of waves?
A. Two sounds canceling each other out
B. Seeing yourself in a mirror
C. Something looking bent under water
D. Sound bending around a door
Answer:
C: Something looking bent under water.
CAN SOMEONE PLEASE GET THE OXIDATION NUMBERS FOR THIS PLEASE
H2O+CO2-> H2CO3
Answer:
H2O = 0
CO2 = +4
H2CO3 = +4
Explanation:
Molecules have Question 10 options: A) both potential and kinetic energy. B) neither kinetic nor potential energy. C) only potential energy. D) only kinetic energy.
Answer:
B?
Explanation:
help will make brainliest! :)
Answer:
im not sure, but i believe its T. the dew point is 76.
27. How was the design of the Chernobyl plant different than most modern reactors?
a. The containment building had a dome shape to minimize impact of explosion.
b. The plant was built close to a river to have a constant supply of fresh water.
c. Graphite was used instead of water as a moderator solution in the reactor.
d. The plant design was not significantly different than other reactors.
Answer:
I think its C
Im not sure tho hehe
Can somebody plz help answer this question correctly thank you! ONLY 1-2 sentences is good thanks!
WILL MARK BRAINLIEST WHOEVER ANSWERS THIS QUESTION :DDD
to generate energy means to create energy. chemical energy is the energy that is created when you put effort into doing something..
Which sequence correctly ranks elements from largest to smallest atomic radius?
(A.) Br, As, K
(B.) Cs, Ba, At
(C.) F, S, As
(D.) Mg, Ca, Ba
Answer:
\A.
Explanation: Bromine and arsenic have the same atomic radius, which is 115 and Potassium has an atomic radius of 220.
whose main job is to break down sugar to release energy that a plant cell can use?
Answer:
The Mitochondria
Explanation:
Mitochondria are membrane-bound cell organelles that generate most of the energy required to power the cell's organic chemistry reactions. Energy created by the mitochondria is kept in a tiny molecule known as adenosine triphosphate (ATP).
57.6 75 is rounded off to give answer in 4 significant figures as
Answer:
57.68
Explanation:
Last digit is 5 so we round of 7 to 8
# of protons = 48
Cadmium
Titanium
Oxygen
Krypton
Answer:
Cadmium +p= 48
Titanium p=22
Oxygen p=8
Krypton p=36
So the answer is Cadmium which has #48 protons
Explanation:
How is a carbon atom different from a hydrogen atom?
Answer:
Carbon atom is a chemical element with the symbol C and atomic number 6 ( electrons). While Hydrogen atom is an atom of the chemical element hydrogen that have only 1 electron.
Explanation:
The carbon atom different from a hydrogen atom, because the atomic number of hydrogen is 1 . The atomic mass number of hydrogen is also one. For the carbon atom, the atomic number is 6, and the atomic mass number of carbon is 12.
What is an atomic number ?The term atomic number is defined as the number of a chemical element in the periodic system. The elements are arranged in order of increasing number of protons in the nucleus.
The atomic number is situated at the upper left, or number of protons. In the middle is the letter symbol for the element. Atomic number is equal to the proton number or the number of protons found in the nucleus of every atom of that element.
Thus, Carbon atom is a chemical element with the symbol C and atomic number 6. Whereas hydrogen atom is an atom of the chemical element hydrogen that have only 1 electron and its symbol is H.
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Explain how a heater warms the air in a room, including the words density, volume, and temperature in your explanation
Answer:
Explanation:
Convection currents are created when the air above your radiator heats and then cools and is then heated again. This process happens continuously whilst you have your heating on and the current moves the heat around the room making it nice and warm and toasty.
what does acetic mean
Answer:
Acetic
Explanation:
organic chemistry of, pertaining to, or producing vinegar
organic chemistry of or pertaining to acetic acid or its derivatives
Answer:
dym like vinegar or acetic acid
WILL GIVE BRAINIEST is C6H1005 + O2 → CO2 + H2O balanced?
Answer:
No! The balanced equation is given below:
C₆H₁₀O₅ + 6O₂ —> 6CO₂ + 5H₂O
Explanation:
C₆H₁₀O₅ + O₂ —> CO₂ + H₂O
The equation above is not balanced. It can be balance as illustrated below:
C₆H₁₀O₅ + O₂ —> CO₂ + H₂O
There are 6 atoms of C on the left side and 1 at the right side. It can be balance by 6 in front of CO₂ as illustrated below:
C₆H₁₀O₅ + O₂ —> 6CO₂ + H₂O
There are 10 atoms of H on the left side and 2 atoms on right side. It can be balance by 5 in front of H₂O as illustrated below:
C₆H₁₀O₅ + O₂ —> 6CO₂ + 5H₂O
There are a total of 7 atoms of O on the left side and a total of 17 atoms on the right side. It can be balance by 6 in front of O₂ as illustrated below:
C₆H₁₀O₅ + 6O₂ —> 6CO₂ + 5H₂O
Now, the equation is balanced.
5. __HCl + __NaOH-> __NaCl + __H2O
6. __FeS + __HCl-> __H2S + __FeCl2
7. __C2H4 + __O2-> __CO2 + __H2O
INEEDHELP
Answer:
I dont even know what this is so sorrry
Explanation:
For many plants, carbon dioxide is a limiting factor.
What happens when more carbon dioxide is available to plants?
1.Plant growth increases.
2.Plant growth stays the same.
3.Plant growth decreases.
4.Plant growth may increase or decrease.
Answer:
1
Explanation:
plants use carbon dioxide and if there is more then that mean the plants will have more to use and will grow faster and populate more
How are rocks formed? Explaine in 500 words or less.
Explanation:
Rocks are formed from aggregates of minerals. There are three different types of rocks and they are formed by different processes. Igneous rocks are formed by the cooling and solidification of magma within or on the earth crust. Sedimentary rocks are formed from pre-existing rocks by the lithification of sediments brought into a basin of deposition. Metamorphic rocks are changed rocks that have been mineralogically altered.
Different rocks form under specific conditions and environment. But rocks are connected to one another through the rock cycle. The rock cycle shows that rocks can transition from one form to another.Which set of ordered pairs represents a function?
{(0, 1), (1, 3), (1, 5), (2, 8)}
{(0, 0), (1, 2), (2, 6), (2, 8)}
{(0, 0), (0, 2), (2, 0), (2, 4)}
{(0, 2), (1, 4), (2, 6), (3, 6
A doctor's order is 0.500 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL. How many milliliters of the suspension are required?
The volume of the suspension required : 10 ml
Further explanationGiven
0.500 g of ampicillin
The liquid suspension concentration = 250 mg/5 mL
Required
The volume of the suspension required
Solution
The concentration of a substance can be expressed in various units such as molarity, ppm, g / L etc.
Each unit change, we must pay attention to the conversion factor
Conversion g to mg
0.5 g = 500 mg
The volume of the suspension needed :
=mass x concentration
[tex]\tt \dfrac{500~mg}{250~mg/5~ml}=500~mg\times \dfrac{5~ml}{250~mg}\\\\=10~ml[/tex]