At stp,250cm3 of gas had a mass of 0.36g.what result does this give for the molar mass of the gas​

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

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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).

Answer:

1- Environmental Value System or EVS is a worldview that molds the way both individuals and the societies they form perceive and therefore evaluate environmental concerns.

2-Entropy/ the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work.

3-Equilibrium/a state of balance between opposing forces or actions that is either static

4-Feedback/a return of information about a result or the returned portion of a process.

5-Feedback,negative/ is a self-regulatory system in which it feeds back to the input a part of a system's output so as to reverse the direction of change of the output.

6-Feedback,positive/ is the amplification of a body's response to a stimulus.

7-Gaia/ all organisms and their inorganic surroundings on Earth are closely integrated to form a single and self-regulating complex system

8-Model/a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes.

Answer: Chemical X H3 and f1

Explanation:

Answer:

2.4 × 10-1

Explanation:

Answer: I think its hydrogen, good luck

Explanation:

Answer:

Last diagram

Explanation:

Here, only individual atoms of argon are there in this gas

Answer:

Advantages of chemistry:-

•Basic knowledge of chemistry helps you to read and understand product labels.

•Chemistry can help you make informed decisions.

•Chemistry is at the heart of cooking. ...

•A command of chemistry can help keep you safe!

Disadvantages of chemistry:-

•It isn't a sustainable form of energy. ...

•It can be expensive.

•It can produce harmful waste.

•It can be used to create devastating weapons.

Answer:  The SI system is easier and more consistent.  If the Klingons in the next galaxy know the definitions of metric, they can replicate the measures on their own planet.  With English, they'd need to grab a yardstick the next time they did a crop circle.

Explanation:  I'll use "SI" for the International System of Units.  There are several key benefits;

Answer:

I think he was right but not explaining

Explanation:

I think it is C cause.... the volume of a material is the amount of matter that matterial can hold. it should the the amount of space the whole material takes up.

so C is the answer.

pls make this the brainliest.

not because it is, but because I asked.

Answer:

Mass is a measure of the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg), but smaller masses may be measured in grams (g). To measure mass, you would use a balance.

Answer:

When boiling a substance, the particles obtain more kinetic and potential energy from the heat being delivered. The kinetic energy means that the particles starts moving more intensely, and the potential energy means that the particles start to move away further from each other, which means the substance expands in volume.

Explanation:

When a liquid is heated, the particles gain energy and begin to move faster and faster, expanding the liquid. As the liquid warms, the most energetic particles at the surface escape as vapor from the surface.

A particle is a small localized object to which several physical or chemical properties, such as volume, density, or mass, can be assigned in the physical sciences.

Atoms are small units of matter that contain a number of particles known as subatomic particles. The term particle, on the other hand, refers to any small object.

As a result, the primary distinction between atoms and particles is that atoms are small units composed of multiple particles, whereas particles are minute portions of matter.

When a fluid is subjected to heat, the particles acquire energy and start moving extremely fast, causing the liquid to expand.

The much more energetic particles at the exterior getaway as vapor phase from the surface as the liquid warms.

Thus, the arrangement and movement of the particles gets disturbed when a substance is boiled, and it gets escaped as vapor.

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Answer:

If the same index fossil is found in different areas, the strata in each area were likely deposited at the same time. Thus, the principle of faunal succession makes it possible to determine the relative age of unknown fossils and correlate fossil sites across large discontinuous areas.

Answer:

d = 44 km (you have the answer?)

Explanation:

time = 35 minutes * 1 hour / 60 minutes

time = 0.58333 hours.

D = r * t

r = 75 km / hr

t = 0.58333 hours

d = 75 * 0.58333

d = 43.74 km

Answer:

Ar

Explanation:

the last one

The diagram that shows a pure substance which is composed of only individual atoms and not molecules will be: argon gas. Option D is correct.

A pure substance composed of only individual atoms is called an element. In the periodic table, each element is represented by a unique symbol, and its atoms cannot be further broken down into simpler substances by chemical means.

Liquid water: Water (H₂O) is a compound composed of two hydrogen atoms bonded to one oxygen atom. It consists of molecules, not individual atoms.

Hydrogen gas: Hydrogen gas (H₂) is composed of two hydrogen atoms bonded together to form a diatomic molecule. It is not composed of individual atoms.

Carbon dioxide GAS: Carbon dioxide (CO₂) is a compound consisting of one carbon atom bonded to two oxygen atoms, forming a molecule of CO₂.

Argon gas: Argon (Ar) is an element, and in its pure form as a gas, it exists as individual argon atoms (Ar). It is not bonded to any other atoms, and there are no molecules involved. Therefore, argon gas is composed of individual atoms and represents a pure substance.

Hence, D. is the correct option.

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Answer:

First of all, Energy is released when water molecules bond.

Explanation:

When a bond is formed its stability increases from their respective atoms.  So energy is released but when we are breaking a bond we are changing a compound to a lower energy state to higher energy state it's stability decreases and requires a bit of extra energy higher stability of bond higher energy required to break it…

Answer:

Fixed Volume

Explanation:

Solids have a fixed shape and occupy a fixed volume.Because the particles in liquids are very close together barely further apart than in solids, liquids do not easily compress, so their volume is fixed. Gases can also flow, so occupy the shape of their whole container. They do not have a fixed shape.

Answer:

0.034 = 34×10^-3

Explanation:

This is because the special point is notated until it goes in front of the first counting number

Scientific notation is a way of expressing numbers that are very large or very small in a compact and standardized format. 0.034 in scientifc notation is written as 3.4 × 10⁻³

In scientific notation, a number is expressed as the product of a coefficient and a power of 10. The coefficient is a decimal number greater than or equal to 1 but less than 10, and the power of 10 represents the magnitude of the number. The power of 10 indicates the number of places the decimal point must be moved to obtain the original number.

For example:

The number 4,500,000 can be written in scientific notation as 4.5 x 10⁶, where the coefficient is 4.5 and the power of 10 is 6.

The number 0.000043 can be written in scientific notation as 4.3 x 10⁻⁵, where the coefficient is 4.3 and the power of 10 is -5.

Scientific notation allows for easy representation of very large or small numbers and simplifies calculations involving these numbers. It is particularly useful in scientific fields where values such as distances, masses, and concentrations can vary over a wide range.

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Answer:

4 ans is 3,5ans is iv i know only this much

Answer:

Mass= volume x density

Explanation:

Multiply the density by the volume.

Answer:

please translate to English so I can help

Explanation:

the reason is bc I cant read this so jus comment in English and I'll reply the answer

Answer:

Um... Hello in environmental education. i think that what u said :)

Explanation:

Spanish System is not the name of a measurement system.

WHAT IS A MEASUREMENT SYSTEM:

Therefore, the SPANISH system is not one of the measurement systems in use.

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Isotones are nuclides that have the same neutron number but a different proton number. Therefore the answer is  C. boron and carbon.

Answer:

c) carbon and boron

Explanation:

They have the same number of neutrons but different number of protons.

They both contain 7 neutrons

Answer:

c

Explanation:

because when you crush an ice it  would break into peace's and the ice would not be a solid

Answer:

since it has lower mass. the force acting on it results in larger acceleration.

nail polish remover float

Answer:

it will float on water

explanation:

Geekette hypothesized that since it floated on the water, like ice does, it must be less dense. ... According to Ken Johnsen, who lists his expertise in chemistry, the components of nail polish indeed make it less dense than water

Answer:

Explanation:

im not sure

Answer:

5.2427*10^4

If rounding then 5.2*10^4

Explanation:

Answer:

Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup."