CHEMISTRY HIGH SCHOOL

Which phase of matter consists of particles that are held together but have the ability to flow past each other?

Answers

Answer 1
Answer:

Explanation:

In solids, molecules are held together due to strong intermolecular force of attraction between them. These molecules do not move past each other as they are fixed at their position. As a result, solids have definite shape and volume.

In liquids, molecules are less tightly held as a result the molecules are able to move and hence they slide past each other. Liquids do not have fixed shape and volume.

In gases, molecules are held by weak Vander waal forces. Therefore, they move rapidly from one place to another with more collisions.

Thus, we can conclude that liquid is the phase of matter which consists of particles that are held together but have the ability to flow past each other.
Answer 2
Answer: liquid making it the correct answer

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I am in desperate need of help will give 40 points to whoever helps me!!!!! I have a quiz tomorrow but I have no idea how to do these practice problems. I know u have to use the boiling and freezing pint formula but i don't know how to plug them in because these problems all look different and asks for different things

Answers

All of the questions here are pertaining to the colligative properties of a solution and the preparation of solutions. Maybe, it would be best if you understand the equations to be used in order to answer these questions.
Freezing point depression or Boiling point elevation:

ΔT = -K (m) (i)

ΔT is the change in the freezing point or the boiling point not the freezing point/boiling point. Therefore, it should be added to the original value of the property of the solvent. 

K is a constant called the molal freezing point depression constant and for the boiling point is the boiling point elevation constant. It is a property of the solvent. 

m is the concentration of the solute in the solvent in terms of molality or kg solute/kg solvent. 

i is the vant hoff factor which will represent the number of ions which the solute dissociates when in solution.

What is the change in heat energy when 132g of copper at 32.2°C is raised to 45.0oC? The specific heat of copper is 0.385 J/g °C.

Answers

Heat energy can be calculated by using the specific heat of a substance multiplying it to the mass of the sample and the change in temperature. It is expressed as: 

Energy = mCΔT
Energy = 132 (0.385) (45 - 32.2)
Energy = 650.50 J

What is a limiting reagent?

Answers

The reactant that is used up first in a reaction.
It is the substance that is totally consumed when the chemical reaction is complete....

In the third period of the periodic table, sodium is followed by magnesium, aluminum, silicon, and phosphorus. Which of these elements has the smallest atomic size?

Answers

Answer:  (E)       Phosphorus

Explanation: PLATO

Answer:

E.

Explanation:

What is an ionice equation with phases for the following chemical reaction: 2HBr(aq)+BaOH2(aq)-->2H2O(l)BaBr2(aq)?

Answers

Molecular reaction 

2HBr(aq) Ba(OH)2 (aq) = 2H2O (l) BaBr2(aq) 


Ionic equation 

2H 2Br- Ba 2 2OH- --------> Ba 2 2Br - 2H2O 

Net ionic equation 

2H (aq) 2OH- (aq)- ---------> 2H2O (l)

Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 375 mL of insulin at a concentration of 40.0 mg/mL . What is the total mass of insulin in the bottle?

Answers

To solve multiply the mL by the mg/ml so 375*40=15000mg
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