CHEMISTRY HIGH SCHOOL

Viscosity is the tendency of a solid to melt to a liquid.

TRUE

FALSE

Answers

Answer 1
Answer:

Answer:

False

Explanation:

The temperature at which solid changes into liquid is known as the melting point.

Energy is required for a solid to melt into a liquid.

However viscosity is known as  friction in liquids. It is the force that opposes movements in liquid. Viscosity causes liquids to be sticky. It is measured as a force per unit area.

As such, melting is the change from solid to liquid and not viscosity.

The answer is thus false.
Answer 2
Answer:

 The statement about “Viscosity is the tendency of a solid to melt to a liquid” is false. It is melting not viscosity. Viscosity is the tendency of how the fluids flow.

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In which sample do molecules have the greatest average kinetic energy? A.) He at 100 K. B.) H2 at 200 K. C.) O2 at 300 K. D.) H2O at 400 K.
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Which of the following is not a true statement? 0.2 moles O 2 = 6 g
0.75 moles H 2CO 3 = 47 g
3.42 moles CO = 84.0 g

Answers

Answer: 3.42 moles CO = 84.0g, is not true.

Explanation:

Moles is given by the formular; Mass / Molar Mass.

Therefore; 0.2 moles O2 = 6g is true  when we multiply 32g x 0.2 = 6g approximately.

 0.75 moles H2CO3 = 47g.

Molar formular for H2CO3 = 2 + 12 + 48 =62g.

If we multiply  62g (molar mass ) by 0.75moles, it gives us 47g approximately.

3.42 moles CO = 84g

molar mass of CO = 12 + 16 = 28g

Multiply 28g x 3.42 moles =  95.76g, which is not true.

Name the solutes that raises the boiling point of water the most.

Answers

Non-volatile solutes such as salt raises the boiling point of water. Hope the answer helps! Good luck!

All of the following can increase free radical production, EXCEPT: A)Smoking B)Tanning booths and radiation. C)All of these options increase free radical production. D)Consuming pesticides and chemical additives. E)Lead and other heavy metals exposure.

Answers

C) All of these options increase free radical production

In the past, investigators would look at which two types of cues when trying to determine if someone was lying? Biased and unbiased


Verbal and non-verbal


Quiet and loud


Simple and complex

Answers

Answer : Verbal and non-verbal communication wad used by Investigators in the past when trying to determine if someone was lying.

Explanation: In the Verbal communication information is transferred from one person to other by speaking.

Non-verbal communication includes Facial expressions , eye contact , body language, eyes blinking etc.

If someone is lying he or she will easily dermined by applying above things.
Verbal and nonverbal.

They would look for shakiness of the voice (verbal) or darting eyes (nonverbal), and other things to that same effect.

In any pure sample of CO2, the ratio of the mass of carbon to the mass ofoxygen is always the same. You can justify this ratio by the fact that
compounds are composed of which of the following?
A. Identical molecules created from atoms combined in whole
number ratios
B. Atoms whose chemical properties do not change during a
chemical reaction
O C. Atoms whose masses do not change during a chemical reaction
D. Different molecules which together produce the observed
elemental ratios

Answers

Identical molecules created from atoms combined in whole number ratios this is the best justification for In any pure sample of CO2, the ratio of the mass of carbon to the mass of oxygen is always the same.

What ratio of Mass of Oxygen and Carbon?

  • Consider the elements carbon and oxygen. Combined in one way, they form the familiar compound carbon dioxide. In every sample of carbon dioxide, there are 32.0g of oxygen present for every 12.0g of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 2.66 to 1.
  • Carbon has an atomic weight of 12, oxygen in diatomic form(O2) of 32 and CO2 of 44. This means that the mass of 6x1023 atoms of CARBON has a mass of 6 kilograms, the mass of 6x1023 diatomic oxygen molecules is 32 kg, and for CO2 it is 44kg. So carbon is the lightest and CO2 the heaviest.

Identical molecules created from atoms combined in whole number ratios this is the best justification for In any pure sample of CO2, the ratio of the mass of carbon to the mass of oxygen is always the same.

To learn more about Mass of Oxygen and Carbon refer:brainly.com/question/25996574

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Answer:A

Explanation:por q si bb

A solution with a ph of 11 is first tested with phenolpthalein

Answers

A solution with a ph of 11 is first tested with phenolpthalein. The phenolphthalein indicator will turn pink because a phenolphthalein indicator only reacts with basic solutions.
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