New Pressure of gas when temp is 235 k

Answers

Answer 1

Answer: There is not much information given so I would have to make certain assumptions. Here are the following:
1. the gas is ideal
2. The gas is in its standard pressure and specific volume. (1atm and 22.4L/mol)
3. There is no initial temperature hence the pressure given the assumptions above is the "new" pressure.

PV=nRT

P= (0.0821L.atm/mol K)(235)/(22.4L/mol)
P=0.861 atm (below atmospheric pressure)

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Describe cycling or movement of water throughout earths spheres. Explain why the process is considered a cycle. Write a complete paragraph (five complete sentences minimum) in order to receive full credit for this activity

Answers

Answer:

This process is considered as a cycle because it continues and dosent stops. This process includes the evaporation of watet from earth surface due to heat.this water is converted in to water vapours. After reaching clouds it condences back. When the clouds become heavy with watef it falls back on earth as rain.and the process repeats.

Explanation:

A rock can be broken down into different kinds of substances by physical processes. No chemical reactions are needed to separate different parts of a rock into pure substances. This is because a rock is a(n) .

Answers

This is because a rock is an aggregate of different minerals. This means that it is a physical mixture rather than a chemical one. While a rock is a combination of different minerals, minerals are substances with uniform composition, represented by a chemical formula.

Answer:

the awnser is minerals :)

Explanation:

just took the test on edg.

Isotopes of the same element have different ____.a. positions on the periodic table
c. atomic numbers
b. chemical behavior
d. mass numbers

Answers

Answer:

d. mass numbers

Explanation:

Isotopes are atoms that have the same number of protons (atomic number) but different number of neutrons. As the definition of mass number is the sum of protons and neutron in an atom, the isotopes have different mass numbers.

The answe is D. Mass number

The melting points of canola oil, corn oil, sunflower oil, and peanut oil are 10°C, –11°C, –17°C, and –2°C. If you cool a mixture of these oils to 5°C, which one can you separate easily?

Answers

You can separate out the canola oil easily, because it has cooled down enough to turn back into a solid.

Calculate the density of a rectangular metal bar that is 7.00 cm long, 4.00 cm wide, and 1.00 cm thick and has a mass of 352 g is?

Answers

Density is mass divided by volume (d=m/v)
To calculate volume you multiply the length, width, and height of the object (v=lwh)
In this example, we get a product of 28
So 352/28 is 12.57142.... Round to the nearest decimal place indicated in your instructions or keep as is

Answer:

12.58 g/cm³

Explanation:

V = 7×4×1 = 28cm³

ρ = m/V = 352/28 ≈ 12.58 g/cm³

Which phrase most accurately describes a chemical change?Question 3 options:

A change on the molecular level.

A change in appearance.

A change in taste.

A change in form.

Answers

The phrase that most accurately describes a chemical change is; "A change on the molecular level."

The major difference between a physical change and a chemical change is that a chemical change involves a change in the composition of a substance.

This implies that the atoms in a substance are rearranged during a chemical change.

This rearrangement of atoms corresponds to change on a molecular level.

Learn more; brainly.com/question/6284546

The signs of a chemical reaction include
Production of a gas (bubbles)
Production of heat
Production of light
Color change
Production of a solid (precipitate) in a solution

So from those answers we see that A is the correct answer.

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