CHEMISTRY MIDDLE SCHOOL

2. Name three factors that influence the rate at which a solute dissolves in a solvent?
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Answers

Answer 1
Answer:

Answer:

1. Temperature

2. Surface area

3. Catalyst

Explanation:
Answer 2
Answer:

Answer:

Heat, molecular size, and surface area

Explanation:

Heat: higher temperatures are directly correlated to higher kinetic energy. With more kinetic energy, the solute molecules move faster and the bonds are more likely to break.

Molecule size: usually at the same temperature and pressure, the solute with smaller molecular size dissolves faster. A large molecule usually has a heavier weight and size, which makes it more difficult for the solvent to surround it and help break its bonds.

Surface area: increasing surface area generally increases the solubility rate. This is because with a higher area, more molecules are exposed to the solvent, so their bonds are more likely to break.

Related Questions

The diagram below illustrates a chemical equation. Chemical equations can be used to model chemical changes and show how elements become rearranged during chemical reactions. Which statement about is chemical equation is true? A. Two compounds have reacted to produce one compound. B. Two elements have reacted to produce one element. C. One compound and one element have reacted to produce one compound. D. Two elements have reacted to produce one compound.
I need 2-6 please help me
What are two ways in which the suns energy can be captured and used?  How can both be used in a home?
What is it when a cup of ice turns to water
What type of energy powers a gas stove?

What is the rock that has no exposure to chemical or mechanical weathering known as?

Answers

Tthis is known as the Goldich Dissolution Serie

Why did Thomson’s results from experimenting with cathode rays cause a big change in scientific thought about atoms?A.His results gave people a picture of what atoms look like for the first time.
B.His results gave the first clues that atoms could be created and destroyed.
C.His results gave the first experimental evidence that matter is made up of atoms.
D.His results gave the first evidence that atoms were made up of smaller particles.

Answers

Answer:

D, because he discovered electrons

Explanation:

His results gave the first evidence that atoms were made up of smaller particles.

your friend has to plan an experiment for a science fair. He asked for your help. His topic is "The Strongest Cloth for Backpacks." What variables must the experinemt include? What variables must be controlled?

Answers

The strongest cloth for backpacks is the most durable fabric such as nylon, cotton or canvas. These are the most durable fabrics and can withstand wear and tear over time.

What makes a quality backpack?

A quality backpack should last a couple of years. It enables us to carry things safely. A good backpack should be waterproof, lightweight, flexible, durable and provide protection to the materials.

A quality backpack should have heavyweight material which can hold more weight.

Nylon is the most commonly used material to make premium quality backpacks. It is waterproof, lightweight and also resistant to wear and tear. The only disadvantages of using this material is its high cost and not stylish.

Nylon is a wonderful material to be used when it comes to camping and hiking.

Learn more about Nylon here:

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The variables will include all of the materials for the backpack. The controlled variable will be how much roughing up each cloth will experience.

what is the volume of 24.0 g of oxygen gas at stp? i need to show work and i just cant get it. please help?

Answers

Molar mass  O₂ = 16 * 2 = 32.0 g/mol

1 mol -------- 32.0 g
? mol -------- 24.0 g

mol = 24.0 * 1 / 32.0

= 0.75 moles

1 mol ------- 22.4 L ( at STP )
0.75 moles --- ?

v = 0.75 * 22.4 / 1

v = 16.8 L

hope this helps!

What is the difference between fats and oils? A. Oils are lipids and fats are proteins.

B. At room temperature, fats are solid and oils are liquid.

C. Fats are lipids and oils are carbohydrates.

D. Fats are triglycerides and oils are waxes.

Answers

Answer:

B. At room temperature, fats are solid and oils are liquid.

Explanation:

Fats and oils are one of the the three macronutrients (the other two are protein and carbohydrates).

However, fats and oils are different from each other: fats are mainly obtained from animals, while oils are mainly obtained from vegetable sources.

The major difference between fats and oil is that fats are composed of high amounts of saturated fatty acids which makes them solid at room temperature, while oils are composed of mainly unsaturated fatty acids which makes them liquid at room temperature.

Note that: in daily use the two terms may be used interchangeably.

It is B.  When at room temperature fats are solid and oils are liquids.

How to I find the number of electrons in and Atom?

Answers

Look at the atomic number of an element on the periodic table which is the smaller number.
The atomic number shows the number of protons/electrons so the number of protons and electrons are the same.
Whereas the mass number of an element (the other number) is the number of protons + neutrons.
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Some land plants have evolved specialized vascular tissues that have allowed them to thrive on land. The developement of these structures was necessary becauseLand plants need to extract water from the ground and move it to the other structures of the plant. Land plants need to be tall and the vascular tissues are what provide rigidity to the plant’s cells. Land plants need to photosynthesize and the vascular tissues is where this process occurs. Land plants don’t really need these structures as they can absorb water from the air through their leaves.
The same force is used to kick both of these objects below. Which will have greater acceleration? Bowling ball Soccer Ball They will accelerate the same Neither will accelerate
1) identify the physical state of the substances pictured.2 what would happen to the shape of each substance if the jars were broken? use the differences in the physical state of the substances to explain your answer. 3)would the volume of each substance change if each were moved into a larger container? explain...4)why do you think bottles are made from amorphous solids such as plastic and glass? why aren't they made from crystalline solids?5)what must the melting point of the mold be compared to the temperature at which glass get soft?why?6)when the parison is placed in the second mold, it doesn't yet have the exact shape of a finished bottle . is the prison's viscosity low or high? explain 7)glass is something called a super cooled liquid. why do you think this is so?