Answer: 1 g H2 gas
Explanation:
8g O2 = 0.25 moles
1g H2 = 0.50 moles [I assume you mean H2, not H. If it is H, then moles = 1.0 moles H
7g N2 = 0.25 moles
1.5 g He = 0.43 moles
===============
The moles above are based on molecules. All but He are multiplied by 2 to give the number of atoms. If H2 is correct, it has the greatest number of atoms. (Not if it is just H).
What conditions might cause a
scientist to modify
or revise a
hypothesis
Answer:
Upon analysis of the results, a hypothesis can be rejected or modified, but it can never be proven to be correct 100 percent of the time. For example, relativity has been tested many times, so it is generally accepted as true, but there could be an instance, which has not been encountered, where it is not true.
Explanation:
35. A line graph uses_ on the x-axis
a. categories
b. time
C. dependent variable
d. control group
need help with these questions
Answer:
I don't know the answer sorry
Use the word stable to explain why the alkali metals tend to lose 1 valence electron.
Answer:
becoz vvv is always with you
Answer:
Alkali metals have one valence electron on their outer shell. They are more stable when they have eight valence electrons so they tend to loose that one electron and obtain a full octet, therefore become stable
How many micrograms (ug)
are equal to 0.000520 grams?
[?] ug
Answer:
520
Explanation:
This is easy
En la tienda compre una botella con agua la cual no venía etiquetada, ¿Que unidades de medición debe contener la etiqueta para saber la masa de la botella, su volumen y a qué temperatura debe mantenerse?
La unidad de medición para saber la masa de la botella es el gramo.
La unidad de medición para saber el volumen de la botella es el centímetro cúbico o el mililitro o el litro.
La unidad de medición para saber la temperatura de la botella es el grado Celsius.
Inicialmente, vamos a asumir que la botella de agua ha sido comprada en una zona donde las unidades del Sistema Internacional de Medidas es el Sistema Estándar de Pesas y Medidas. En este problema, se requiere conocer tres unidades para la Masa, el Volumen y la Temperatura, cuyas Unidades Fundamentales son las siguientes:
Masa - Kilogramo ([tex]kg[/tex])Volumen - Metro cúbico ([tex]m^{3}[/tex])Temperatura - Grado Celsius ([tex]^{\circ}\,C[/tex])Puesto que la adquisición de botellas de agua en almacenes se realiza en forma Minorista, tanto el Volumen como la Masa, Propiedades Extensivas de la Materia, deben basarse en Unidades Derivadas, es decir, Unidades relacionadas con Unidades Fundamentales mediante relación constante, mientras la Temperatura debe ser una Unidad Fundamental por ser una Propiedad Intensiva de la Materia. Las Unidades más usuales para la botella de agua son:
Masa - Gramo ([tex]g[/tex])Volumen - Centímetros Cúbicos ([tex]cm^{3}[/tex]) o Mililitros ([tex]mL[/tex]) o Litros (L)Temperatura - Grado Celsius ([tex]^{\circ}\,C[/tex])La unidad de medición para saber la masa de la botella es el gramo.
La unidad de medición para saber el volumen de la botella es el centímetro cúbico o el mililitro o el litro.
La unidad de medición para saber la temperatura de la botella es el grado Celsius.
Invitamos a ver esta pregunta relacionada con Unidades del Sistema Internacional: https://brainly.com/question/19388259
Which of the following is an
example of a homogeneous
mixture?
A. fruit punch
B. a sandwich
C. a toolbox
Answer:
fruit punch
Explanation:
............
What did the Aboriginal people use to weave dilly bags?
Answer:
This bag has been made from introduced materials, but before foreign fibres were used dilly bags were made from bark, leaves, stems, roots, human hair, animal fur and animal sinew.
What are the two key ingredeints that help science move forward?
Answer:
science needs both ideas the hypothesis and facts the quantitative results to move forward
Explanation:
the two primary features of a scientific hypothesis are falsifiability and testability which are reflected in an If…then statement summarizing the idea and in the ability to be supported or refuted through observation and experimentation
Why is ice melting considered to be a PHYSICAL change?
A. the water molecules do not change chemically and are still H2O
B. the water molecules change into new chemicals and are no longer H2O
C. They are chemically mixed and won’t for H2O
D. They will just be the same liquid (already did this and it wasn’t it)
Answer:
A. the water molecules do not change chemically and are still H2O
Explanation:
The arrangement of molecules is the only change that occurs
[tex].[/tex]
CCC Systems and System Models Liquid gallium changes to a gas at 2229°C.
Describe how a model of gaseous gallium would compare to the model of liquid
gallium shown in the picture.
Gaseous gallium will consist of atoms separated from each other by a large distance and do not experience inter-particle attractive forces.
There are three states of matter;
SolidLiquidGasMatter can exist in all these states of matter depending on the extent of inter-particle attractive forces in the substance.
Inter-particle attractive forces are strongest in solids hence they have a definite shape and volume and do not flow.
Liquids have weaker inter-particle attractive forces than solids hence liquid particles can flow. Liquids have a definite volume but not a definite shape.
Gases have almost no inter-particle attractive forces between particles hence gas particles are separated by large distances and move at very high velocities. A gas does not have definite shape or volume.
A model of gaseous gallium will show atoms of gallium separated by large distances and do not experience inter-particle attraction.
A model of gas particles is shown in the image attached to this answer.
Learn more: https://brainly.com/question/11067389
(30 POINTS)
Which of the following increases the concentration of OH- ions?
Acid
Base
Water
Salt
Answer:
Acid btw I am new in Brainly
When using an electronic device, such as an electronic balance, the measurement displayed on the screen is assumed to have one estimated digit included. in fact, you'll often sec the estimated digit changing rapidly, because there is fluctuation in the estimate. Explain why it is important to record the zero in the measurement shown to this right,
The zero calibration of the electronic balance allows to maintain the precision of one digit.
Electronic measurement equipment has a mechanism to set the zero of the measurement every time the equipment is turned on, this procedure must be carried out to eliminate:
Possible existence of some material on the plateChanges in the characteristics of the balance completes due to agingCchanges in ambient conditions, for example temperatureChanges in the mass of the plate due to deformation or breakage.
The methods of regurgitating the zero of the balance consists of measuring the weight without masses and bringing this value to zero, in general by changing some adjustable parameter of the balance, for example magnetic field current, reference level with a beam of light.
With this calibration it will be achieved that there is always a precision digit in the readings.
With Electronic Balance Calibration it is possible to have a pressure digit
learn more about electronic balance here:
brainly.com/question/13206375
Answer:
The zero is the estimated digit.
Explanation:
If the zero was left off of the measurement, people would assume the tenths place was the estimated digit.
A girl pushes a toy boat to the right with a 15 N force. A boy pushes the same boat to the left with a 20 N force. what is the net force? what will happen?
Answer:
the net force is 5. I believe the boat with move to the left due to the increase amount of force the boy is using to push the boat.
What is 1.0 x 10^4 L in nL?
Answer:
= 10000000000000 Nanoliters
Explanation:
1.0 x (10^4) L =
10 000 L
10 000L converted into Nanoliters
= 10000000000000 Nanoliters
Hope this helps
van dar waals are the dominant molecular force in the sodium chloride.
Answer:
Recall the two conceptual steps necessary to dissolve a solute and form a solution
Key Points
There are two conceptual steps to form a solution, each corresponding to one of the two opposing forces that dictate solubility.
The first conceptual step is dissolution, which corresponds to the force of the solvent-solvent and solute-solute intermolecular attractions that needs to be broken down.
The second conceptual step is solvation, which corresponds to the force of the solute-solvent intermolecular attraction that needs to be formed in order to form a solution.
Many intermolecular forces can contribute to solvation, including hydrogen bonding, dipole-dipole forces, Van Der Waals forces, and ion-dipole interactions.
Term
intermolecular forcesattractive and repulsive forces between molecules
The strength of the intermolecular forces between solutes and solvents determines the solubility of a given solute in a given solvent. In order to form a solution, the solute must be surrounded, or solvated, by the solvent. Solutes successfully dissolve into solvents when solute-solvent bonds are stronger than either solute-solute bonds or solvent-solvent bonds.
Qualitatively, one can determine the solubility of a solute in a solvent by using the rule “like dissolves like”. In general, solutes whose polarity matches that of the solvent will generally be soluble. For example, table salt (NaCl) dissolves easily into water (H2O) because both molecules are polar.
Intermolecular Forces and Their Importance in Solution Formation
There are two conceptual steps to form a solution, each corresponding to one of the two opposing forces that dictate solubility. If the solute is a solid or liquid, it must first be dispersed — that is, its molecular units must be pulled apart. This requires energy, and so this step always works against solution formation (always endothermic, or requires that energy be put into the system).
#pa follow and heart po para sa iba pang answer at pa brainlest answer na den
Each of the following can be used to make observations, except:
A material that resists changes in shape and volume would be
A. solid
B. liquid
C. gas
D. plasma
Answer:
solids
Explanation:
solids aren't very malleable of prone to change shape and/or volume so...
Is soapy water water good for plant irrigation (give answer in accordance to chemistry)?
Answer:
soapy water is not good for plants irrigation that is what I learn
Answer:
Soapy water is not good for plant irrigation because soapy water contains sulphate in it which is not good for the development of plants.
Explanation:
hope this helps
Which has the strongest intermolecular forces?
A B C or D
Answer:
A
Explanation:
Is a mixture of stones?
homogeneous or heterogeneous
Answer:
Heterogeneous mixture because it is not soluble and in non uniform texture.
What is the formula mass of a compound with 2 aluminum atoms and 3 oxygen atoms?
Answer:
[tex]\boxed {\boxed {\sf 101.96 \ amu}}[/tex]
Explanation:
Formula mass is the sum of the atomic masses of the atoms in a molecule. Essentially, it is the mass of 1 molecule of a compound.
We are given a compound containing 2 aluminum atoms and 3 oxygen atoms. We will use the Periodic Table to look up the atomic masses of the 2 elements in the compound.
Al: 26.981538 amuO: 15.999 amuThese are the atomic masses of 1 atom of the element. Remember we have 2 Al atoms and 3 O atoms. We multiply the element's atomic mass by the number of atoms of that element in the compound.
2 Al: 26.981538 amu *2= 53.963076 amu 3 O: 15.999 amu * 3=47.997 amuNow we add the atomic mass of 2 Al atoms and 3 O atoms.
53.963076 amu + 47.997 amu = 101.960076 amuWe may want to round this answer to the hundredth place. The 0 in the thousandth place tells us to leave the 6 in the hundredth place.
101.96 amuThe formula mass of a compound with 2 aluminum atoms and 3 oxygen atoms is approximately 101.96 atomic mass units.
When a metal such as copper is heated,it expands. Can anyone tell me what happens to the metal particles as the solid metal expands?
Answer:
The metal molecules inside start to vibrate faster, causing the solid to change to liquid if exposed to the intense temperature over a long period of time.
Explanation:
As my answer states, but for an explanation, lets say you are boiling an ice cube, it will start to turn into liquid water, that is because it has been exposed to that heat for a long period of time. The same will happen for the metal, if its exposed for long enough, it will turn into a liquid, then can be turned into a gas because the molecules are vibrating so quickly that they start to easily move apart.
Hope this helps, let me know if any more clarification is needed.
In addition to how much force Earth exerts on the object, which features of an object affect its weight?
EEEE
O mass and location of the object
O shape and location of the object
O location of the object and how much energy the object has
O mass of the object and how much energy the object has
Answer:
mass of the object and how much energy the object has
Steel is element, compound, heterogeneous mixture, solution, suspensión or coloideo.
Answer:
Steel is an example of a solid-solid solution (aka an alloy).
Explanation:
Which part of John Dalton’s theory was disproved by J.J. Thomson’s cathode-ray tube experiments?(1 point)
Atoms can form new substances.
Atoms are indivisible.
Atoms are small.
Atoms can join together.
The part of John Dalton’s theory was disproved by J.J. Thomson’s cathode-ray tube experiments is; "Atoms are indivisible".
One of the major postulates of the Dalton's atomic theory is that the atoms of elements are "indivisible".
This idea resounds from the earliest ideas of Greek philosophers concerning the atom.
Through the cathode-ray tube experiments, J.J. Thomson discovered sub-atomic particles.
This nullified the idea that atoms are indivisible.
Learn more: https://brainly.com/question/13157325
Which phrase is the best definition of matter?
A. The amount of physical material in an object
B. Anything that takes up space and has mass
C. Anything that can be measured
D. A particle made up of two or more atoms
SUE
The amount of physical material in an object
oops i dont think i meant to do this
what happens when an object in space revolves
Answer:
Objects in space follow the laws or rules of physics, just like objects on Earth do. Things in space have inertia. ... The movement of things in space is influenced by gravity. Gravity is an important force that can change the course of bodies in space or pull them off of one course, or even cause them to crash together.
Explanation:
i Hope This Helps :3
Answer: It is Turing on an axis, in a 360* motion. OR, since you didn’t specify, it could be revolving around the sun, meaning it is traveling around the sun once.
A gas has a density of 5.56 g/L. What would the mass in kilograms of 1 m^3 of this gas
Answer:
Mass is 5560 grams
Explanation:
[tex]{ \boxed{mass = density \times volume}}[/tex]
Density is 5.56 g/L
Volume is 1 m³ = 1,000 L
Substitute the following to get mass:
[tex]mass = (5.56 \times 1000) \\ { \boxed{ \boxed{mass = 5560 \: grams}}}[/tex]
