Answers
Answer:
try use Google search
Explanation:
you need to use it
Related Questions
the mass of a large car is 100kg how much force would be required to accelerate the car at a rate of 3m/s2?
Answers
Answer:
The answer is 300 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 100 × 3
We have the final answer as
300 NHope this helps you
Direction is not important when describing an object's motion.
O True
False
Answers
Calcium carbonate decomposes into calcium oxide and carbon dioxide as shown below. If 20.7 grams of CaCO3 decompose, what is the theoretical yield in grams of CaO?
If 6.81 grams of CaO are actually recovered, what is the percent yield?
CaCO3 --> CaO + CO2
**Your answer should be written as XX.X
Answers
Answer:
Percentage yield =58.7 %
Explanation:
moles of calcium carbonate as a reactant = [tex]\frac{20.7 g}{100.086 g/mol} =0.2068 mole[/tex]
as per molar equation , 0.2068 moles of calcium carbonate produces 0.2068 moles of CaO .
amount of CaO = 0.2068 mole x (40.078+15.999) g/moles = 11.598 gram
percentage yield = actual yield / theoritical yield = 6.81/ 11.598 = 0.587 or 58.7 %
If the pressure of a gas is quadrupled (4x), how
will the volume of the gas change? You answer
must be specific. It must include a number.
Answers
Answer:
Yes. The volume would be 1/4 of the initial volume.
Explanation:
At constant temperature, the pressure of a gas is inversely proportional to the volume of the gas. Hence;
P1V1 = P2V2
where P1 is the initial pressure, V1 is the initial volume, P2 is the final pressure, and V2 is the final volume.
If the pressure of a gas is quadrupled;
P2 = 4P1, the equation becomes
P1V1 = 4P1 x V2
Making V2 the subject:
V2 = P1V1/4P1
V2 = V1/4
This means that the volume would change by being reduced to 1/4 of the initial volume.
Will the properties of nitrogen be more similar to the properties of neon or the properties of phosphorous?
O Phosphorous
Neon
O No answer text provided.
No answer text provided.
Answers
What is the mass number of an atom with 8 protons 10 neutrons, and 8
electrons
Answers
The mass number is 18
In the reaction of nitrogen with hydrogen to produce ammonia, NH3, how many moles of ammonia would be produced from 1.0 mol of hydrogen and excess nitrogen?
N2 + 3 H2 --> 2 NH3
0.33 mol
0.67 mol
2.0 mol
1.3 mol
Answers
According to the equation;
3 mol of hydrogen will produce 2mol of ammonia.
1 mol of hydrogen _____________________?
= 2 × 1/3
= 0.67 mol
Answer:
0.67 mol
Explanation:
Given data:
Number of moles of ammonia produced = ?
Number of moles of hydrogen = 1.0 mol
Amount of nitrogen = excess
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of ammonia with hydrogen.
H₂ : NH₃
3 : 2
1.0 : 2/3×1.0 = 0.67
Thus, from 1.0 mole of hydrogen 0.67 moles of ammonia will produced.
I need help with this
Answers
Answer:
There are 2 carbon atoms present.
4. Arrange the following from the smallest number of representative particles
to the largest:
a. 1.25 x 1025 atoms Zn
b. 3.56 mol Fe
C. 6.78 x 1022 molecules glucose (C6H1206)
Answers
The correct sequence for the number of representative particles in the increasing order has been C < B < A.
The representative particles in a compound have been the smallest unit that has been held together to form the compound. The representative particle can be an atom or a molecule.
The number of representative unit in the following samples has been:
[tex]1.25\;\times\;10^2^5\;\rm Zn\;atoms[/tex]The atoms have been the representative particle. The number has been given as, [tex]1.25\;\times\;10^2^5[/tex].
3.56 mol FeThe representative unit for Fe has been atoms. According to the Avogadro law, one mole of sample has been constituted of [tex]6.023\;\times\;10^2^3[/tex] atoms. The number of atoms in 3.56 mol Fe has been:
[tex]\rm 1\;mol\;Fe=6.023\;\times\;10^2^3\;atoms\\3.56\;mol\;Fe=6.023\;\times\;10^2^3\;\times\;3.56\;atoms\\3.56\;mol\;Fe=21.44188\;\times\;10^2^3\;atoms[/tex]
The representative particles for 3.56 mol Fe are [tex]21.44188\;\times\;10^2^3[/tex].
[tex]\rm 6.78\;\times\;10^2^2\;molecules\;C_6H_1_2O_6[/tex]The molecule has been the representative unit for the complex compounds. The number of representative unit has been [tex]6.78\;\times\;10^2^2[/tex].
The arrangement of the representative unit in the increasing order has been:
[tex]\rm 6.78\;\times\;10^2^2\;molecules\;C_6H_1_2O_6\;<\;21.44188\;\times\;10^2^3\;atoms\;Fe\;<\;1.25;\times\;10^2^5\;atoms\;Zn[/tex]
Thus, the correct sequence for the number of representative particles in the increasing order has been C < B < A.
For more information about representative particle, refer to the link:
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Elements with atomic numbers 7 and 83 have how many valence electrons? *
5 and 5 valence electrons
4 and 8 valence electrons
2 and 2 valence electrons
7 and 83 valence electrons
Answers
Explanation:
element with atomic numbers 7 and 83 have 5 and 5 valence electrons
which of the following would form an ionic bond?
a.strontium and oxygen
b. sulfur and oxygen
Answers
A 2.89 g sample of sulfur reacts with 5.72 g of copper to form a black compound.
What is the percentage composition of the compound?
Answers
Answer:
50.5% Sulfur and 49.5%copper
Explanation:
2.89g/5.72g= 0.505*100=50.5%
100% - 50.5% = 49.5%
which statment describes the cell cycle
Answers
Explanation:
The cell cycle is an ordered series of events involving cell growth and cell division that produces two new daughter cells. Cells on the path to cell division proceed through a series of precisely timed and carefully regulated stages of growth, DNA replication, and division that produces two identical (clone) cells.
Answer:
cycle
Explanation:
How does heat energy from the sun reach Earth?
A. Conduction
B. Radiation
C. convection
d. other
Answers
Heat from the sun reaches the Earth by radiation. The heat we receive is mostly by UV rays (ultra violet rays). This is a form of radiation, and exposure to too much of it is harmful to us.
I hope this helps!
Pls help me it detects if it’s right or wrong
Answers
The Blackland Prairies region is named for the deep, fertile black soils that characterize the area.
Lithium (Li): 1s 2sB
A=
B=
Answers
Answer:
A = 2
B = 1
Explanation:
The atomic number of lithium is 3.
Its atomic mass is 7 amu.
It is present in group group 1.
It has one valance electron.
Lithium is alkali metal it form salts.
It is silvery soft metal. It has lowest density as compared to all other metals.
It react vigorously with water.
It is used in rechargeable batteries which are used in camera, mobile, laptops etc.
The electronic configuration of Li:
Li₃ = 1s² 2s¹
Thus,
A = 2
B = 1
distinguish(solid,liquid,gas)
Answers
Answer:
Explanation:
A solid, at a given temperature, has a definite volume
and shape which may be affected by changes in
temperature. Solids usually increase slightly in size
when heated (expansion) and usually
decrease in size if cooled (contraction).A liquid, at a given temperature, has a
fixed volume and will take up the shape of any
container into which it is poured. Like a solid, a
liquid’s volume is slightly affected by changes in
temperature.
A gas, at a given temperature, has neither a definite
shape nor a definite volume. It will take up the shape
of any container into which it is placed and will
spread out evenly within it. Unlike those of solids
and liquids, the volumes of gases are affected quite
markedly by changes in temperature.
A stretched rubber band is an example of:
A. Kinetic energy
B. Potential energy
C. Gravitational energy
D. Light energy
Answers
Answer:
Potential Energy
Explanation:
Not sure how to explain it but C and D could be crossed off as answers, kinetic energy would be if it was released (?)
sorry if im wrong
Explain how the forces involved in a car crash could lead to multiple cars coming to a complete stop. Use information from the article in order to answer this question. You should be answering in at least 2 complete sentences.
Answers
Answer:
Newton's First Law...
Explanation:
The only force that acts on the car is the sudden deceleration from v to 0 velocity in a brief period of time, due to the collision with another object. However, when viewing the total system, the collision in the situation with two cars releases twice as much energy as the collision with a wall
Delta College Public Radio broadcasts on a frequency of 90.1 megahertz (MHz). (Mega = million). What is the wavelength of the Delta College radio waves?
Answers
Answer:
3.23m
Explanation:
Using the formula, λ = v/f, the wavelength can be calculated
In λ = v/f
λ = wavelength (m)
v = speed of light (3 × 10^8m/s)
f = frequency (Hz)
Since frequency (f) is 90.1 megahertz (MHz) i.e. 90.1 × 10^6 Hz
9.01 × 10^7Hz
λ = v/f
λ = 3 × 10^8 ÷ 9.01 × 10^7
λ = 0.3229 × 10^(8-7)
λ = 0.3229 × 10¹
λ = 3.23m
numerical Through the two ends of glass-tube of lenght 2 meters, hydrogen chloride and ammonia gases are allowed to enter.At what distance ammonium chloride will first appear?
Answers
Answer:
81cm is the answer.
Explanation:
Let X be the length from the HCl end, and therefore, (2-x) from the other end.
For X length, rate of diffusion is :
dx/dt=P A/(Square root of 36.5T
d(2−x)/dt=PA/(square root of 17 T
Dividing both we get;
X/(2−x)= square root of 36.5/17
X=2/2.466=0.81 or81cm
Please help me!
Physical change involves a change in composition.
True or False
Answers
Answer:
FALSE!!
Explanation:
Physical changes occur when objects or substances undergo a change that does NOT change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combines or break up to form new substances.
WILL MARK BRAINLIEST-
what is the lewis dot structure of CH2OH and N2O4
Answers
N2 + 3H2 Right arrow. 2NH3 What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100..
Answers
Answer:
53.4%
Explanation:
N₂ + 3H₂ → 2NH₃
Given that:
26.3 g of H₂ react with N₂ to produce 79.0 g of NH₃
Then:
The number of moles of H₂ = 26.3g of H₂ * (1 mol of H₂/ 2.02g of H₂)
= 13.05 mol of H₂
The number of moles of NH₃ = 13.05 mol of H₂ * ( 2mol of NH₃/ 3 mol of H₂)
= 8.697 mol of NH₃
The mass of NH₃ = 8.697 mol of NH₃ *( 17.04g of NH₃/ 1 mol of NH₃) = 148.1 g of NH₃
The percent yield = actual yield/ theoretical yield * 100%
The percent yield = ( 79.0 g/ 148.1 g )* 100%
The percent yield ≅ 53.4 %
Answer:
53.4
Explanation:
You are sitting outside on a warm day with a cold glass of water. You notice water droplets starting to collect on the outside of the glass. What kind of phase change are you observing?
1.Melting
2.Condensation
3.Evaporation
4.Sweating
Answers
Answer:
2
Explanation:
No explanation needed
Michael has a substance that he puts in Container 1. The substance has a volume of 5 cubic meters. He then puts the substance in Container 2, and it now has a volume of 10 cubic meters. In which phase(s) is the substance?
solid or liquid
liquid or gas
liquid
gas
Answers
Answer:
it's d (gas)
Explanation:
right on edge
When the substance is transferred from Container 1 to Container 2, its volume increases from 5 cubic meters to 10 cubic meters. This means that the substance expands to fill the entire volume of the container, indicating that it is in the gas phase. Hence the correct option is d.
What is a Gas phase?A gas phase is a state of matter in which a substance exists as a gas. In this phase, the substance has a high kinetic energy, and its particles are free to move randomly and rapidly in all directions.
The particles in a gas phase are far apart from each other and have very weak attractive forces, allowing them to fill up the entire volume of the container they are in.
The properties of a gas phase can be explained by the kinetic molecular theory, which states that gases are composed of small particles (atoms or molecules) that are in constant random motion.
The theory explains that the temperature of a gas is related to the kinetic energy of the particles, and that the pressure of a gas is related to the force of the particles colliding with the walls of the container.
Therefore option d gas is correct.
To learn more about Gas phase:
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Producers in the Nitrogen, carbon and oxygen cycle are typically____
Answers
am not sure but in time i will look for the answer
At about what temperature does the sample change phase? Justify your
answer based on the cooling curve shown above.
A student states, “When the alcohol sample was at a temperature of 500 K, all the particles were moving faster than any of the particles were moving at
400 K" Do you agree or disagree with this student's statement? Justify your
answer.
Answers
Answer:
This is very true
Explanation:
The kinetic energy in a system is directly proportional to the temperature of a system.
The higher the temperature, the faster the particles of a system will move. From the kinetic molecular theory, we see that the temperature of a system is a measure of the average kinetic energy of the molecules.
In chemical kinetics, as the temperature increases, the kinetic energy of the system also increases.
Can someone please help me answer that question
Answers
Answer:
Mk but in just a minute I gotta go for a sec and do my homework.
Explanation:
Please help!
Using the table, complete the following statements.
SPECIFIC HEATS
Substance Specific Heat (cal/g·°C)
water 1.0
ice 0.5
glass 0.16
silver 0.06
One gram of glass will rise 20° C when (what) calories of heat are applied.
Ten grams of ice will require (what) calories to raise its temperature 1° C.
Options to both questions:
5.
0.016.
2.
50.
3.2.
1.6.
0.32.
0.5.
32
Answers
Answer:
One gram of glass will rise 20*C when 3.2 Calories of heat are applied
Ten grams of ice will require 5 Calories to raise its temperature 1*C.
When 3.2 Calories of heat are applied to one gram of glass, the temperature rises by 20*C. Ten grams of ice requires 5 Calories to rise by 1*C.
What is Specific Heat?The amount of heat needed to raise a substance's temperature by one degree Celsius in one gram is also known as specific heat. Typically, calories or joules per gram per degree Celsius are used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gram per degree Celsius. The notion of specific heat was developed by the Scottish scientist Joseph Black in the 18th century as a result of his discovery that equal masses of different substances required varying quantities of heat to raise them through the same temperature range.To learn more about Specific Heat, refer to:
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