CHEMISTRY HIGH SCHOOL

Which best describes the function of a centrifuge?to separate the solute from the solvent
to separate the dissolved part of a solution into layers
to separate a mixture by heating it for a long period of time
to separate the undissolved particles of a mixture into layers

Answers

Answer 1
Answer: The correct answer is the last statement. Centrifugation is to separate the undissolved particles of a mixture into layers. It separates a homogeneous mixture by spinning it at high speeds. The precipitate settles at the bottom while the solution is clear.
Answer 2
Answer:

The correct answer is the last answer choice

Related Questions

Which element has 32 protons in its nucleus? phosphorus cobalt germanium sulfur
Butane mol A sample of an alcohol is tested and found to contain 52% carbon, 35% oxygen, and 13% hydrogen by mass. Tests indicate that the molecular weight of the molecule is between 30 and 80. What is the molecular formula of the alcohol?
Boyle’s law states that the volume of a gas is inversely proportional to its pressure if theA. temperature and number of particles are constant. B. temperature reaches absolute zero. C. number of particles decreases. D. temperature and number of particles are doubled
How many times faster will oxygen gas diffuse than carbon dioxide
Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below. 2HgO 2Hg + O2 The molar mass of HgO is 216.59 g/mol. The molar mass of O2 is 32.00 g/mol. How many moles of HgO are needed to produce 250.0 g of O2? 3.906 7.813 15.63 73.87

A 1.0-gram piece of zinc reacts with 5 milliliters of HCl(aq). Which of these conditions of concentration and temperature would produce thegreatest rate of reaction?
(1) 1.0 M HCl(aq) at 20.°C
(2) 1.0 M HCl(aq) at at 40.°C
(3) 2.0 M HCl(aq) at at 20.°C
(4) 2.0 M HCl(aq) at at 40.°C

Answers

Answer : The correct option is, (4):2.0MHCl(aq)\text{ at }40^oC

Explanation :

Le-Chatelier's principle : It states that the change in the variables of the reaction, the equilibrium will shift in that direction where the effect will be minimum.

The rate of reaction is directly related to the concentration of the reactants and the temperature of the reaction.

If the concentration of the reactant increases, the equilibrium will shift in the forward direction that means the rate of reaction increases and if the concentration of the reactant decreases, the equilibrium will shift in the backward direction that means the rate of reaction decreases.

If the temperature of the reaction increases then rate of reaction also increases and vice-versa.

Thus, the rate of reaction is greater at high concentration and temperature.

Hence, the correct option is, (4):2.0MHCl(aq)\text{ at }40^oC

What type of state is glass? please explain about it.

Answers

On a small time scale, glass is in a solid state. When you look at a window, it appears solid.

However, it has been observed that over a very long period, glass starts to act like a liquid.

It can thus be characterized by two different states depending on the time scale considered.
I think the other answer is incorrect. Glass being a liquid is a misconception, from when glassmaking was imperfect and windows were thicker at the bottom of the pane than the middle. But that was from when the glass was MADE, after being heated and put into a liquid form.

Mass of 2.88x10^-4 mol of ascorbic acid

Answers

Molar mass C₆H₈O₆ = 176.12 g/mol

1 mole ------------------ 176.12 g
2.88x10⁻⁴ mole -------  ?

mass = 2.88x10⁻⁴ * 176.12 / 1

mass ≈ 0.05072 g

hope this helps!

All atoms of the same element have the same ____.

Answers

Answer:

The correct answer is protons.

Explanation:

Hello! Let's solve this!

All atoms of the same element have the same number of protons. The isotopes of an element are chemical species that change the number of neutrons but not that of protons.

Then the different atoms of the same element differ in their protons.

The correct answer is protons.

All atoms of the same element have the same number of protons.

Protons are subatomic particles that are found within the nucleus of an atom. They have a positive electrical charge, which is equal in magnitude but opposite in sign to the negative charge of electrons. Protons are one of the three main types of particles found in atoms, along with neutrons and electrons.

The number of protons in an atom determines its atomic number and defines the element. For example, an atom with one proton is hydrogen (H), while an atom with six protons is carbon (C).

Learn more about protons, here:

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A salt is best described as a compound that is formed from the reaction between

Answers

mical Compound

In chemistry, a salt is an ionic compound that results from the neutralization reaction of an acid and a base. Salts are composed of related numbers of cations and anions so that the product is electrically neutral.

Answer:

A

An acid and a base

Explanation:

A balloon is a sphere with a radius of 5.0 m. The force of air against the walls of the balloon is 45 N. What is the air pressure inside the balloon? (surface area = 12.56 x radius^2; 1 Pa = 1 N/m^2)A. 1.4 x 10^3 Pa

B. 3.6 x 10^2 Pa

C. 1.4 x 10^-1 Pa

D. 3.6 x 10^-2 Pa

***Idk how to solve this... pls explain?? thx :)

Answers

Pressure is the force exerted on an object per unit area. The equation is expressed as:

P = F / A

From the given above, we substitute the values to the equation.

P = F/A
P= F / (12.56r²)
P = 45 N / (12.56 x 5²
P = 0.143 N/m²

Therefore, the correct answer is option C, 1.4 x 10^-1 Pa.
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