CHEMISTRY HIGH SCHOOL

A substance has a triple point at -24.5 ∘C and 225 mmHg. What is most likely to happen to a solid sample of the substance as it is warmed from -35 ∘C to 0 ∘C at a pressure of 220 mmHg? A substance has a triple point at -24.5 and 225 . What is most likely to happen to a solid sample of the substance as it is warmed from -35 to 0 at a pressure of 220 ? The solid will melt into a liquid, The solid will sublime into a gas, or Nothing (the solid will remain as a solid).

Answers

Answer 1
Answer:

Answer:

The solid will sublime into a gas

Explanation:

See the phase diagram attached (the diagram is not an exact representation of this case, it is only illustrative). You starts at point A, that is, a point below triple point pressure (220 mmHg is lower than 225 mmHg) and to the left of triple point temperature (-35 °C is lower than -24.5 °C). Then, you move to point B, which is at the same pressure at A but its temperature is to the right of triple point temperature (0°C is greater than -24.5 °C).
Answer 2
Answer: this product remains as mercury if it is subatomic

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Quartz, which contains one silicon atom and two oxygen atoms per formula unit, is the second-most-common mineral on Earth after feldspar. It is used as a gemstone, as well as in pressure gauges, oscillators, resonators, wave stabilizers, heat-ray lamps, and prismastic lenses, and in the manufacture of glass, paints, abrasives, and precision instruments such as watches. What is the chemical formula for quartz?

Answers

The chemical formula for quartz is SiO_2

The chemical formula for quartz is SiO_2, which represents one silicon atom and two oxygen atoms in each formula unit.

Quartz is composed of silicon (Si) and oxygen (O) atoms bonded together in a specific arrangement. Its chemical formula, SiO2, represents this composition.

In quartz, each silicon atom is bonded to two oxygen atoms, and each oxygen atom is bonded to one silicon atom. This arrangement forms a three-dimensional network structure, making quartz a crystalline mineral.

The chemical formula SiO_2 provides a precise representation of the elements and their ratios in quartz.

Silicon and oxygen are the two elements that make up the mineral, and they are combined in a 1:2 ratio, meaning that for every silicon atom, there are two oxygen atoms.

This ratio is essential for understanding the stoichiometry and structure of quartz.

Quartz has various applications due to its unique properties, such as its hardness, transparency, and ability to transmit certain wavelengths of light, making it valuable in electronics, optics, and various industrial processes.

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The positively charged particles found in the nucleus of an atom are called ______.a. nuclear forces.
b. electrons.
c. protons.
d. subatomic particles.

Answers

the answer is (c) protons

A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occurred during his experiment?The powder catches on fire.
The powder releases bubbles.
The powder heats up.
The powder breaks apart into smaller particles.

Answers

The powder catches fire. The rest of the choices pertains to physical changes on the powder. When the powder catches fire a chemical change happens. For example, if the powder is organic, carbon dioxide and water will result during the combustion. 

Answer:

➢ⅇ powder catches on fire

....….that would be your answer

Explanation:

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Seriously help please??Assuming all of the atoms attached to the central atom were identical, which of the following geometries would produce a nonpolar molecule? (Only 3 choices are correct.)

-linear
-trigonal planar
-tetrahedral
-trigonal bipyramidal
-octahedral
-bent (angular)

Answers

Covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule.

What is chemical Compound?

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Using VSEPR and electron pair repulsion, we can easily find that linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule if we assume that all of the atoms attached to the central atom were identical. Any geometries which have center of symmetry will produce non polar molecule.

Therefore, linear, tetrahedral and trigonal planar geometries would produce a nonpolar molecule.

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Using VSEPR and electron pair repulsion, we can easily find that:

linear
tetrahedral
trigonal planar


are all non polar molecules.

If'substance X is a liquid, substance Y is a gas, and substance Z is a solid, and all are at thesame temperature and pressure, then the order of increasing strength of their intermolecular
forces would be

Answers

The answer is Y < X < Z

A salt is dissolved in water, which has a boiling point of 100 degrees celsius. the boiling point of the solution would be?

Answers

It would be higher, due to lower vapor pressure when salt is added. If you want an exact number, we're going to need to know how much salt.
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