CHEMISTRY MIDDLE SCHOOL

Which matter exists in the gaseous state at room temperature? A. brick
B. helium
C. school glue
D. washing powder

Answers

Answer 1
Answer: helium i would think so
Answer 2
Answer: The answer is B. Helium. If you look at the periodic table, Helium is a noble gas, and all noble gases are in the gas phase at room temperature.
Hope this helped ^-^

Related Questions

Which system consists of nerves that initiate communication?
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What are the most chemically active metals located on the periodic table
Which atomic number corresponds to the element which is most stable?1381636
1.The ___________ energy in a mechanical system is determined by adding the potential and kinetic energy together.total massive 2.The initial ___________ energy is equal to zero because the starting point is set at zero height to make things easier.kinetic potential 3.In the example, the final kinetic energy is determined to be ___________ because at the peak height, the ball instantaneously stops.positive zero negative 4.In this system, potential and kinetic energy are ________________ proportional.inversely directly

Which of the following statements is true?1. Dalton believed atoms were made mostly of empty space.
2. Plasmas have a net negative charge.
3. The number of protons in an element is always equal to the number of neutrons.
4. Solids have a fixed mass, volume, and shape.

Answers

Answer:  Solids have a fixed mass, volume, and shape.

Explanation:  Solids are the substances which have fixed shape, fixed volume and mass due to its close packed structure.

Dalton explained that all the elements are made up of small indivisible particle known as Atoms but after some time this was proved wrong as atoms is not indivisble, it conatins sub atomic particle like electrons, protons, neutrons etc.

Plasmas are considered as the fourth state of matter which contains equal quantity of positive ions and negative electrons.

The number of protons are equal to the number of electrons. The sum of number of protons and neutrons make the atomic mass quantity.
solids have a mixed mass, volume, and shape.

Name three types of bodies in the solar system

Answers

Sun, the plants, dwarf plants. you could also say gas giants.
Planets,stars, moons and a lot of more bodies in the solar system

Which is an example of an organism? A. an octopus B. sand granules C. water D. the colors of a feather

Answers

A. An octopus

An organism is an individual animal, plant, or single-celled life form.

The octopus is the only living thing listed so that is why it is the example of an organism

When studying seismic records from all over the globe, what did scientists find out about the pattern of earthquakes?A-Many earthquakes are concentrated in narrow zones near earth's poles.

B-Many earthquakes are concentrated in narrow zones at the centers of plates.

C-Many earthquakes are concentrated in narrow zones along plate boundaries.

D-Most earthquakes occur deep under the ocean.

(I was thinking C but i'm not sure...)

Answers

Its C. Many earthquakes are concentrated in narrow zones along plate boundaries

The answer is C-Many earthquakes are concentrated in narrow zones along plate boundaries.

C

The rapid movement of gases molecules can be explained because gases have ___ size particles and exert _____ attraction for other gas particles.

Answers

Answer:

The correct answer is D. small, little

Explanation:

The rapid movement of gases molecules can be explained because gases have smallsize particles and exert littleattraction for other gas particles.

hope this helps :)

1. small size particles

2.exert little attraction

A chemical formula is shown. what do the subscripts in a chemical formula represent? select TWO answers.★ the number of atoms.

★ C = 1, H = 6, O = 5

★ C = 6, H = 6, O = 1

★ the number of molecules.

Answers

It would be the number of atoms and C=6 H=6 and O=1

Answer:

The subscripts in a chemical formula represent two things:

Explanation:

The subscripts in a chemical formula represent two things:

1. The number of atoms: The subscripts indicate the number of atoms of each element present in a compound. For example, in the chemical formula H2O, the subscript "2" indicates that there are two hydrogen atoms in each water molecule.

2. The number of molecules: The subscripts can also represent the number of molecules in a compound. However, it's important to note that this is not always the case. In most cases, the subscripts in a chemical formula specifically indicate the number of atoms rather than the number of molecules.

To clarify the examples given:

- The statement "★ the number of atoms" is correct. Subscripts in a chemical formula do represent the number of atoms.

- The statements "★ C = 1, H = 6, O = 5" and "★ C = 6, H = 6, O = 1" are not relevant to the question as they do not pertain to the role of subscripts in a chemical formula.
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