Is crumpling a piece of paper chemical changes

Answers

Answer 1

Answer: No, because you are not changing the chemical make-up of the paper

Answer 2

Answer:

Answer:

No, it would be a physical change, as the crumpled paper is still paper. There was no chemical reaction. An example of chemical change would be burning paper, as it turns to smoke and ashes.

Related Questions

The fossil record is the record of life on earth preserved in rock as fossils. The fossil record provides evidence of what types of plant and animals lived, how long they lived, how they died, and changed. It also tells us about Earth’s early environment, and how it changed. The fossil record helps determine the age of rock formations by looking at how deep the fossil are buried in the rock. When a fossil is found above another fossil in a rock formation, the deeper fossil are considered older.What can scientists infer about a specific period of Earth's history if many fossils were discovered from oxygen-breathing organisms?A) the atmosphere lacked oxygen B) only fish lived during that time C) the dinosaurs used all the oxygen D) the atmosphere had lots of oxygen
As the water is cooled, at what temperature do its particles become fixed in place?
Suppose the plates beneath Earth's surface stopped moving.What do you think would happen?Explain your answer.
What makes up soil besides rock particles,minerals,air,and water?
Which compounds are classified as Arrhenius acids?(1) HCl and NaOH (2) HNO3 and NaCl (3) NH3 and H2CO3 (4) HBr and H2SO4

A. What is the Potential energy (PE) of a 2 kg (mass) hammer which is 0.4 meter up? (use g = 9.8) Show your work. b. What is the PE of an object with a mass of 10 kg, and 2 meters up?

c. Finish this sentence to describe what happens to potential energy: As the height of an object increases…

d. Which has more potential energy, a bowling ball on the floor or a grape on the floor? Explain.

Answers

Answer: a. 7.84 J

b. 196 J

c. The amount of potential energy increases.

d. None of them. Since both objects are in the floor assuming that the height is zero.

Explanation:

A container of hydrogen at 172 kpa was decreased to 85.0 kpa producing a new volume of 765 mL. What was the original volume

Answers

Answer:

$\boxed{\text{378 mL}}$

Explanation:

The temperature and amount of gas are constant, so we can use Boyle’s Law.

$p_(1)V_(1) = p_(2)V_(2)$

Data:

$\begin{array}{rclrcl}p_(1)& =& \text{172 kPa}\qquad & V_(1) &= & \text{?} \np_(2)& =& \text{85.0 kPa}\qquad & V_(2) &= & \text{765 mL}\n\end{array}$

Calculations:

$\begin{array}{rcl}172V_(1) & =& 85.0 * 765\n172V_(1) & = & 65 025\nV_(1) & = &\textbf{378 mL}\n\end{array}\n\text{The original volume was } \boxed{\textbf{378 mL}}$

A 475mL sample of gas was collected at a temperature of -21.5 and a pressure of 756mmHg. Calculate the volume of a gas(in liters) if the conditions were altered to STP

Answers

The volume of gas under STP is 0.512 liters.

Explanation:

At STP (Standaed Temperature and Pressure)

T = 0°C

P = 1 atm = 760 mmHg

Given

P1 = 756 mmHg

T1 = -21.5°C = -21.5 + 273 = 251.5 K

V1 = 475 mL = 0.475 L

P2 = 760 mmHg

T1 = 0°C = 0 + 273 = 273 K

We know that

$(P1 * V1)/(T1) = (P2 * V2 )/(T2)\n\n(756 * 0.475)/(251.5) = (760 * V2)/(273)\n$

$V2 = (273 * 756 * 0.475)/(251.5 * 760) \nV2 = (98034.3)/(191140)$

V2 = 0.512 L

What does lithium 6 and lithium 7 look like

Answers

Lithium 6 would have 6 valence electrons in the outer orbital, while lithium 7 would have 7 in the outer orbital.

what best explains why the use of fossil fuels for energy production is a not a long-term solution to the world's energy needs?

Answers

We can't use fossil fuels forever, someday we will run out of coal for example.

What types of atoms typically form covalent bonds?Metals with nonmetals, because their difference in electronegativity is above 1.7.
Metals with nonmetals, because their difference in electronegativity is below 1.7.
Nonmetals with nonmetals, because their difference in electronegativity is above 1.7.
Nonmetals with nonmetals, because their difference in electronegativity is below 1.7.
HELP!!!

Answers

Answer:

Nonmetals with nonmetals, because their difference in electronegativity is below 1.7.

Explanation:

Covalent bond is the bond which is formed with the sharing of the electrons between the two atoms which are taking part in the bond. It is generally formed between the atoms with similar electronegativity values.

It is the bond which is generally occurs within non metals as they share electrons to complete their octet.

The difference in the electronegativity values of the atoms involving in a covalent bond must not exceed the value of 1.7 .

Correct answer:- Nonmetals with nonmetals, because their difference in electronegativity is below 1.7.

Answer:

Nonmetals with nonmetals, because their difference in electronegativity is below 1.7.

Explanation:

The dude above got it right, and his explanation is sound, so instead of explaining, I can guarantee this is correct, because I took the 03.03 test.

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