Chemistry High School

why bakelite is called thermosetting plastic​

Answers

Answer 1

Answer:

bekelite is called thermosetting plastic because it irreversibly become ridge when heating..

hope it helps.

Answer 2

Explanation:

have a good day hope its helps you

Why Bakelite Is Called Thermosetting Plastic

Related Questions

Si 4 L de un gas están a 0,79 atm de presión, ¿Cuál será su nuevo volumen, si aumentamos la presión hasta 1,05 atm?

Answers

Respuesta:

3 L

Explicación:

Paso 1: Información provista

Volumen inicial del gas (V₁): 4 LPresión inicial del gas (P₁): 0,79 atmVolumen final del gas (V₂): ?Presión final del gas (P₂): 1,05 atm

Paso 2: Calcular el volumen final del gas

Si suponemos que el gas se comporta como un gas ideal y que la temperatura permanece constante, podemos calcular el volumen final del gas usando la ley de Boyle.

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁ / P₂

V₂ = 0,79 atm × 4 L / 1,05 atm = 3 L

Will give brainliest please help!!!

Answers

Answer:

0

Explanation:

im pretty sure its 0 pls mark me as brainliest

Which process produces the energy that is used by solar panels?
A. Combustion
B. Chemical Decay
C. Nuclear Decay
D. Nuclear Fusion

Answers

A. Combustion since it can’t be nuclear….?

D. nuclear fusion

I just took the test

In a chemical reaction, mass is conserved. This means that...
O A. The mass of the reactants stays the same during a chemical reaction
OB. The mass of the products stays the same during a chemical reaction
OC. The tpye and number of atoms in the reactants equals the type and number of atoms in the products
OD. The mass of the products is always twice the mass of the reactants

Answers

Answer: D

Explanation:

May someone assist, please...? I don't know how to do chemistry work...

1) How many mL of 5.00M CaSO4 solution must be


diluted with water to prepare 500.0 mL of 0.900M CaSO4?


2) 20.0 mL of a stock solution of NaOH is diluted with water to prepare 150.0mL of 1.50 M NaOH solution.


Calculate the Molarity of the stock NaOH solution?


3) 12.00 mL of 3.50 M NaOH solution is diluted with 88.0 mL of water.


What is the concentration of sodium hydroxide in the diluted solution?


4) 9.0 mL of 8.0 M HCl solution is diluted with water to prepare 0.50 M HCl solution. What is the final volume of this solution?

Answers

All questions can be solved by C1V1=C2V2

1) 5.00M x V1 = 0.900M x 500.0 mL

V1= 90 ml

therefor you need to add 500 - 90 = 410.0 ml

2) 20.0 mL x C1 = 150.0mL x 1.50 M

C1= 11.25 M

3) 12.00 mL x 3.50 M = 100.0 mL x C2

C2= 0.42 M

4) 9.0 mL x 8.0 M = 0.50 M x V2

V2 = 144 ml

A nucleus of uranium 235 decays. Its decay produces a nucleus of an unknown element (x), a nucleus of helium 4 and energy. What kind of radiation is produced by this decay?

Gamma beta or alpha?

Answers

Answer: Alpha

Explanation:

Alpha particle form of decay produces a nucleus similar to the element helium. During Alpha decay an atom spits out two protons and two neutrons from its nucleus.

Which biome has 4 distinct seasons?

A. Desert
B. Rainforest
C. Deciduous Forest
D. Tundra

Answers

C. Deciduous Forest

has 4 distinct seasons...

Answer: C. Deciduous Forest

Explanation:

I just searched it up.. and it's mostly where I live which has 4 distinct seasons.

Which of the following is true of a balanced equation?

1. The number of atoms per molecule remains the same

2. The kinds of atoms remain the same

3. The number of atoms of each element remains the same

4. The total number of molecules remains the same

Answers

Answer:

The total number of molecules remains the same

Unit 4 Assessment
Chemical Reactions
Multiple Choice Questions: Choose the best answer for each of the
following questions.
1. 2 H2O2 () 4 Mno." (aq) + 3 CIO2- (aq) 4 MnO2 (s) + 3 CIO, - (aq) + 4 OH
- (aq)
According to the balanced equation above, how many moles of CIO, - (aq)
are needed
to react completely with 20. mL of 0.20 M KMnO, solution?
(A) 0.0030 mol
(B) 0.0053 mol
(C) 0.0075 mol
(D) 0.0040 mol
2.
2 KCIO, (s) 2 KCI (s) + 3 02 (g)
According to the equation above, how many moles of potassium chlorate,
KCIO, must be decomposed to generate 1.0 L of Oz gas at standard
temperature and pressure.

Answers

Types of meaning and give me examples in arabic and english about

CH4 + 2O2=CO2+2H2O. how many moles of O2 will be needed to produce 5.0 moles of CO2 from the correctly balanced reaction?​

Answers

Answer:

10 moles of O2

Explanation:

Balanced Equation:

CH4 + 2O2=CO2+2H2O

Now,

According to Stoichiometry,

In the reaction,

           1 mole CO2 is produced by 2 moles of O2

∴5 moles of CO2 is produced by (2 X 5) moles of O2

                                                       = 10 moles of O2

Therefore, to produce 5 moles of CO2, 10 moles of Oxygen is needed.

can i have help with this ???

Answers

Answer:

section 2

Explanation:

it has the shiny silver apperance but at the same time is hard and brittle

How many moles of aluminum nitrate can be produced with 0.68 moles of lead nitrate?​

Answers

i have no idea  can somebody help me too

explain why the sun's light seems to be all around us instead of focused like a spotlight on the earth.

Answers

I think it’s because of earths rotation

Answer:

Hmmm

Explanation:

To be honest this seems to be a straight forward question but it's not at the same time. I mean obviously the sun is in the center and we just surround it. So it's light kinda just hits the whole Earth. In space or on the Moon there is no atmosphere to scatter light. The light from the sun travels a straight line without scattering and all the colors stay together. Looking toward the sun we thus see a brilliant white light while looking away we would see only the darkness of empty space.

Use the figure to answer the following questions.
A
B.
с
12. The shape of Virus B would be classified as a(n)
13.
Conversion of nitrogen into a usable form is known as
14. With an antibiotic, there would be
cells on day 7.
15. Bacteria can break down radioactive waste, such as

Answers

The answer is 14: with an antibiotic, there would be feels on day 7

In what way may drugs be used to affect neurotransmitters?

Answers

Drugs interfere with the way neurons send, receive, and process signals via neurotransmitters. Some drugs, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter in the body. This allows the drugs to attach onto and activate the neurons. Although these drugs mimic the brain’s own chemicals, they don’t activate neurons in the same way as a natural neurotransmitter, and they lead to abnormal messages being sent through the network.

Other drugs, such as amphetamine or cocaine, can cause the neurons to release abnormally large amounts of natural neurotransmitters or prevent the normal recycling of these brain chemicals by interfering with transporters. This too amplifies or disrupts the normal communication between neurons.

can someone help out pls

Answers

Answer:

1. Acids

2. Its molecular arrangement

3. Very acidic

4. Unsaturated

5. Apple juice

Explanation:

1. Acids have pH less than 7

2. Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.3. Very acidic

4. Unsaturated solutions are solutions in which the amount of dissolved solute is less than the saturation point of the solvent (at that specific temperature gradient).

5. The lower the pH, the more hydrogen molecules.

props to the person writing it out

How many grams are in 11.9 moles of potassium sulfide, K2S?

Answers

K2S has a molar mass of (39•2) + (32•1) = 110 gm/mole. 110 gm/mole • 11.9 mole = 1309gm

how much energy does it take to melt 125 g of water

Answers

I don’t know if it was supposed to say melt ice but it’s the same grams of water to melt it 125 grams of water

What is the relationship between
photosynthesis and respiration?
they are inverse processes
they both use oxygen to create energy

A. They are inverse processes

B. They both use oxygen to create energy

Answers

Answer:

A

Explanation:

ANSWER ASAP PLEASE!
Balance the following equation:
_Fe + _O₂ --> _FeO₃

Answers

It would be. 2Fe + 3O2 ——> 2Fe03. You have to make oxygen 6 on both sides in order to balance, then you can do Fe. Which on the right would be 2 by making oxygen 6. Then add the 2 to the other side to balance it.

What mass of silver nitrate will react with 5.85 grams of
sodium chloride to produce 14.35 grams of silver chloride
and 8.5 grams of sodium nitrate?

Answers

The answer is: 17.0 g
I hope it help!

How many moles are in 33 L of CO₂ gas at STP?

Answers

We can assume that the volume of one mole of any gas (within reason) is 22.4 L only if we know that the pressure of the gas is 1 atmosphere (101 kPa) and that the temperature of the gas is zero degrees Celsius (273 K). These are known as standard temperature and pressure (STP). So if the gas in question happens to be at STP then the calculation would be:

3.00 L x 1 mol/22.4 L = 0.134 mol

And 3.00 litres CO2 or any other gas at STP would contain 0.134 moles. If the gas was at some other temperature or pressure, assuming they were “moderate,” you could calculate the number of moles by solving the following formula for n.

PV =nRT Where P is pressure, V is volume, T is temperature in Kelvin and R is the ideal gas constant consistent with the units of volume and pressure used.

What does MVLMEN stand for

Answers

There are a couple things that this can stand for

How many moles of oxygen are produced when 152 grams of water decomposes? 2H2O (1) --> 2H2(g) + O2(g) (balanced)

Answers

Answer:

76

Explanation:

I think 76 should be the correct answer because 152÷2=76

How many moles of glucose are produced?



How many moles of oxygen are produced?

Answers

Explanation:

5.00 mol H2O × (1 mol C6H12O6/6 mol H2O)

= 0.833 mol C6H12O6

5.00 mol H2O × (6 mol O2/6 mol H2O)

= 5.00 mol O2

HELP ME ON THIS
What happens to the particles of a solid when the solid changes into a liquid? (5 points)
They increase in size.
They decrease in size.
The attractive force between them increases.
The attractive force between them decreases.

Answers

Answer:

The attractive force between them decreases

Explanation:

This is because they become localised.

Vitamin B12, cyanocobalamin, is essential for human nutrition. It is concentrated in animal tissue but not in higher plants. Although nutritional requirements for the vitamin are quite low, people who abstain completely from animal products may develop a deficiency anemia. Cyanocobalamin is the form used in vitamin supplements. It contains 4.34% cobalt by mass. Calculate the molar mass of cyanocobalamin, assuming that there is one atom of cobalt in every molecule of cyanocobalamin. WebAssign will check your answer for the correct number of significant figures. g/mol

Answers

Answer:

645 g/mol

Explanation:

Step 1: Given data

Percent by mass of cobalt in cyanocobalamin: 4.34%

Step 2: Determine the molar mass of cyanocobalamin

There is one atom of cobalt in every molecule of cyanocobalamin, or what is the same, there is 1 mole of atoms of Co in every mole of molecules of cyanocobalamin. Given the molar mass of Co is 28.01 g/mol, the molar mass of cyanocobalamin is:

100 g B12/4.34 g Co × 28.01 g Co/1 mol Co × 1 mol Co/1 mol B12 = 645 g/mol

HELP
The potential energy diagram for a reaction starts at 180 kJ and ends at 300 kJ. What type of reaction does the diagram best represent? (5 points)
Exothermic reaction
Endothermic reaction
Reaction between two solids
Reaction between two liquids

Answers

Answer:

Exothermic reaction

Explanation:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise

Answer:

Endothermic

Explanation:

HELP QUICK Which of the following planets spins/rotates faster than earth?
A) Saturn

B) Jupiter

C) Venus

D) Mars

Answers

Answer:

B

Explanation:

Jupiter is the fastest spinning planet.

What kind of crystalline solid is copper?
PLS HELP

Answers

Answer: metallic solid

Explanation:
Copper is a metallic crystalline solid. A metallic solid is an element that can withstand high temperatures and conduct electricity.
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