Answer: no
Explanation: theres a chance but generally no because there can be different substances in different amounts which can have similar volumes
What observations can you make about this group of people? Name one inference you can make from your observations.
Answer:
they are funny and unite.
Thank You
A substance was analysed and found to contain 26.57 % potassium, 35.36% chromium, and
38.07 % oxygen by mass.
What is the empirical formula of the substance?
Select one:
question
O a. K2Cr205
O b. K2Cr207
O c. KCr2O7
O d. K_Cro
Answer: K2Cr2O7
Explanation: Pretend we have 100g of the compound. use the percentage to calculate how many grams of each element are in the 100g.
K: 26.57g
Cr: 35.36 g
O: 38.07 g
Now divide by the molar mass of each element to find the moles of each:
K: 0.7 moles
Cr: 0.7 moles
O: 2.4 moles
That gives us 3.8 moles total. But what's important is to find a factor that would bring all of these mole values to a whole number, since they must be in whole number proportions. The closest I got was around 3.
That would lead to the following empirical formula: K2Cr2O7.
Some movements of air are caused by the temperature of the air. Which of the following is a TRUE statement?
A Warm air rises because its molecules are farther apart, making it less dense.
B. Cold air mixes with warm air because the densities of cold and warm air differ.
C. Cold air rises because its molecules are closer together, making it less dense.
D. Warm air pushes cold air aside because warm air is denser than cold air.
trying to turn this in. Could use the help ASAP!❤️
1.) Which statement correctly describes the relationship between the volume of a gas and it’s temperature, in Kelvin, assuming pressure is held constant?
A.) The relationship is directly proportional; as temperature increases, volume decreases in the same way.
B.) The relationship is inversely proportional,
As temperature increases, volume decreases in the same way.
C.) The relationship is directly proportional, as temperature increases, volume increases in the same way.
D.) The relationship is inversely proportional, as temperature increases, volume increases in the same way.
2.) which statement explains the molecular changes that occur in an enclosed gas as the pressure increases and the temperature is held constant
A.) an increase in pressure causes particles to move farther apart, decreasing the volume
B.) an increase in pressure causes particles to move farther apart, increasing the volume
C.) an increase in pressure causes particles move closer together, decreasing the volume.
D.) an increase in pressure causes particles to move closer together, increasing the volume.
3.) The ideal gas law is represented by PV = nRT. as volume is held constant and the temperature increases, how would the pressure be expected to change
A.) it will remain constant.
B.) it would decrease.
C.) it would increase
D.) it would become zero
4.) when the pressure of gas decreases, which quantity will increase, assuming all other variables are held constant?
A.) R
B.) n
C.) T
D.) V
5.) two balloons hold two different gases. The gases are held at the same pressure, volume, and temperature. Which quality can difference between the two gases?
A.) The molar volume of each gas
B.) The mass of each gas.
C.) The gas constant of each gas.
D.) The number of moles of each gas
Answer:
1.) Which statement correctly describes the relationship between the volume of a gas and it’s temperature, in Kelvin, assuming pressure is held constant?
→ C.) The relationship is directly proportional, as temperature increases, volume increases in the same way.
2.) which statement explains the molecular changes that occur in an enclosed gas as the pressure increases and the temperature is held constant
→ A.) an increase in pressure causes particles to move farther apart, decreasing the volume
3.) The ideal gas law is represented by PV = nRT. as volume is held constant and the temperature increases, how would the pressure be expected to change
→ A.) it will remain constant.
4.) when the pressure of gas decreases, which quantity will increase, assuming all other variables are held constant?
→ B.) n
5.) two balloons hold two different gases. The gases are held at the same pressure, volume, and temperature. Which quality can difference between the two gases?
→ C.) The gas constant of each gas.
1) This statement correctly shows the relationship between the volume of a gas and it’s temperature, in Kelvin, assuming pressure is held constant; "The relationship is directly proportional, as temperature increases, volume increases in the same way."
2) The following statement succinctly shows the molecular changes that occur in an enclosed gas as the pressure increases and the temperature is held constant is; " an increase in pressure causes particles move closer together, decreasing the volume."
3) The pressure increases as temperature increases
4) The volume decreases as the pressure increases
5) The number of moles of each gas of each gas can be different.
From the statement of Charles law, the volume of a given mass of gas is directly proportional to its temperature at constant pressure. Therefore, for a given mass of gas, as temperature increases, the volume also increases at constant temperature.
From the statement of Boyle's law, the volume of a given mass of gas is inversely proportional to its volume at constant temperature. Hence as the pressure increases, the volume of a given mass of gas decreases.
The pressure of a given mass of gas is directly proportional to the temperature of a fixed mass of gas if other variables are held constant.
From Avogadro's law, the volume of a given mass of gas is directly proportional to the number of moles. From this law, the number of moles of each gas of each gas can be different.
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why the two isotopes of bromine have the same chemical properties.
Answer:
Isotopes of bromine have same chemical properties because they have same number of electrons.
Isotopes have only different number of mass that does not affect it's chemical properties too much.
Iron can be protected from rusting by coating it in a thin layer of zinc in a process called galvanisation.The zinc layer is oxidised instead of the iron.Write out word equations for the oxidation reactions of both iron and zinc.
Iron:
Zinc:
Answer:
Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron (III) oxide, which we see as rust. Here is the word equation for the reaction: iron + water + oxygen → hydrated iron (III) oxide
In this reaction, zinc atoms each will lose two electrons (oxidation) and become Zn 2+ ions. The two electrons that are released by zinc will be gained by the Cu 2+ ions (reduction). The Cu2+ ions become Cu atoms. Total equation: Zn (s) + CuSO 4 (aq) --> Cu (s) + ZnSO 4 (aq)
Explanation:
an arrow is moving at 35m/sand travels for 5 seconds.how far did the arrow travel?
Answer:
175 meters
Explanation:
As it's velocity is 35m/s
so,
by formula
35 *5
175 meters
Answer the following questions a. Define atom and molecules
Answer:
Molecules are neutral particles made of two or more atoms bonded together.
Atoms are single neutral particles.
¿Cómo se podría organizar un grupo institucional o comunal para contribuir en el cuidado de los recursos hídricos de la comunidad, de tal manera que se considere el impacto del cambio climático?
How could an institutional or community group be organized to contribute to the care of the community's water resources in a way that considers the impact of climate change?
La manera en la que se podría organizar un grupo institucional o comunal para contribuir en el cuidado de los recursos hídricos de la comunidad, es a través de la formación de Comités interinstitucionales que mitiguen el impacto del cambio climático.
> Primero que nada, es que exista la voluntad política entre cada una de las partes que conformarán el grupo institucional.
> Después, elegir a un Comité que presida las reuniones. Habría un representante gubernamental en ese Comité.
> En ese Comité estarán los líderes de cada agrupación representada.
> Establecer una agenda con los temas, las fechas y los objetivos que se desean conseguir.
> Tener la voluntad política de negociar abiertamente y no anteponer agendas personales y menos, intereses políticos.
> El gobierno tendría que reconocer la autorizad representativa de ese grupo para que realmente sus peticiones tuvieran un peso específico en la toma de decisiones.
> El gobierno debe asignar un presupuesto para que la agrupación pueda operar y en realidad fuera un grupo útil.
Podemos concluir que además del esfuerzo comunal y gubernamental, se podría considerar la participación de la iniciativa privada para fortalecer el presupuesto y los programas de acción para mantener limpios los recursos hídricos de la comunidad.
Aprende más sobre este tema aquí:
https://brainly.lat/tarea/30623876
Which of the following is NOT a correct conversion factor?
1 cm = 0.01 m
1 km = 1000 m
1 cm = 100 m
1 dm = 0.1 m
Answer: 1 cm = 100m
Explanation: Centi- is the prefix used to designate 0.01 (one hundredth) of something. 1 cm means 0.01 m.
1 cm = 100 m is NOT a correct conversion factor. Option C is correct.
what are conversion factors?The conversion factors are the factors that re-use to convert some values from unit to unit of another value like from centimeter to meter from meter to kilometer from milligram to gram.
In one centimeter it is the suffix used to denote it is the one by hundred value of the on meter or which is equal t one meter so, 1cm = 0.01 meters as it is the 1/100 part f the one-meter distance.
Therefore, Option C is correct. 1 cm = 100 m is NOT a correct conversion factor.
Learn more about conversion factors, here:
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Please help!
A. Only Dispersion Forces
B. Only Dispersion Forces and dipole-dipole
C. Dispersion Forces, dipole-dipole and hydrogen bonds
Could you please explain how you can look at the Chemical Formula and determine what type of interactions the molecule can do in simple terminology?
Will mark brainliest
Answer:
a
Explanation:
. Restate What is a physical change in terms
of particle arrangement?
Answer:
In physical changes no new materials are formed and the particles do not change apart from gaining or losing energy
Explanation:
Which battle led to the mass displacement of Cherokee from their homes?
A.
Battle of Lindley's Fort
B.
Battle of Concord
C.
Battle of Yorktown
D.
Battle of Monmouth
Answer:
a. battle of lindleys fort
Explanation:
took the test :)
Answer:
Explanation:
edmedtum test, 100%
Why is cutting a piece of paper considered a PHYSICAL change?
A- even though the paper is in smaller pieces, each piece is still paper
B- cutting the paper causes it to change to a different substance, such as coal
Answer:
A
Explanation:
The answer is A
this apparently needs to be 20 characters long so there
Answer:
A - even though the paper is in smaller pieces, each piece is still paperExplanation:
Physical change - is a type of change in an object's physical look like: color, size, height. But it is still the same object and won't became into something.Example: Putting a red food coloring in the water.[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
Which element has a larger ionic radius than calcium (Ca)?
The Periodic Table
A. Magnesium (Mg)
B. Potassium (K)
O C. Sodium (Na)
O D. Gallium (a)
SUBMIT
Answer:
magnesium
Explanation:
Magnesium has lesser valens electron than Ca, therefore the force for Mg between the nucleus and outer orbit of electron is lesser. Also, the radius will increase
Answer:
Gallium
has a larger ionic radius than (ca).
Can someone plz help me :(
Answer:
i Say B
Explanation:
because I don't know:)
elements of the same group have the same chemical properties why
Answer:
because they have the same number of valence electrons in their outer shells
Explanation:
The atoms of all group 1 elements have similar chemical properties and reactions because they all have one electron in their outer shell.
5. Explain (melting, boiling, freezing, condensing) are considered physical properties.
The electron configuration of Be+2 is
O 1) 152 251
O2) 152
O 3) 152 2s2
O 4) 151
Answer:
the electron configuration is 1s22s2
Answer:
Electronic configuration is 1S²2S²
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have a great day ❤️
sorry for asking for too much but me needs helppppp
Answer:
physical
Explanation:
Answer:
Physical property
Explanation:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
20 Ne + ºHe →
What element is made from this fusion reaction?
a. Magnesium-12
b. Magnesium-24
C. Chromium-12
d. Chromium-24
Answer:
c
Explanation:
because i did it
What would be the atomic mass of Nitrogen-14
Answer:
The atomic mass of nitrogen is
14.0067 uYou learn more from failure than from successAnswer:
14.007 amu
Explanation:
Nitrogen has atomic mass of 14.007 amu.
Too lazy to show the question/answers.. look I comments :) (picture above for change dude)
Answer:
B. an object is cut into pieces
Explanation:
hope this helps
An endothermic reaction is
O when energy is absorbed
O when energy is released
O when no energy is released or absorbed
O No answer text provided.
Answer:
When energy is absorbed!
Explanation:
Endo -> Within
Whenever you hear the suffix endo just think within! Endothermic reactions are when you are inputing energy for the reaction to proceed.
Exothermic reactions are when eneregy is being released this can be in many forms and one of the most common exothermic reactions is the breakage of the terminal phosphate on an ATP molecule which is extremely energetic (or exothermic)
Answer:
ENDOTHERMIC MEANNS WHEN HEAT IS ABSORBED.
ENDO=IN
EXO=OUT
What is the mass of carbon in 290 g of CO2?
Answer:
The mass of CO22 in total is 264 g.
The atomic mass for C is 12 g / mole.
The molar mass for CO22 is (12 + (2 × 16)) = 44 g / mole.
m C = (12 / 44) × 264 = 72 g
So, there are 72 g of C in 264 g of CO2
Explanation:
there's the answer have a good day.
is seawater an element, compound, or mixture?
4. Write the electronic configuration of first 20 elements in the periodic table.
Answer:
see explanation
Explanation:
4. Write the electronic configuration of first 20 elements in the periodic table.
1s1
1s2
1s22s1
1s22s2
1s22s22p1
1s22s22p2
1s22s22p3
1s22s22p4
1s22s22p5
1s22s22p6
1s22s22p63s1
1s22s22p63s2
1s22s22p63s23p1
1s22s22p63s23p2
1s22s22p63s23p3
1s22s22p63s23p4
1s22s22p63s23p5
1s22s22p63s23p6
1s22s22p63s23p64s1
1s22s22p63s23p64s2
Help. Explain if u can. If not just answer. I’m DESPERATE OK
Answer:
the signifigant figures would be 5
Explanation:
branilest pleass
why do rocks tell scientists about the environment in which they formed?
Answer:
Because some have fossils from long ago and some have dirt or sand in them that has hardened into rock over the years if that makes since?
Explanation:
Like if it's sand it could have been a sand dune or desert but if its dirt it could been a grassland or forest?
_____________is when the body is in an erect postion with feet slightly apart and your palms are facing forward with the thumbs pointed away from the body.
Answer:
anatomical position is the answer
