1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alina1380 [7]
2 years ago
15

Please help!

Chemistry
2 answers:
ANEK [815]2 years ago
8 0

Answer:

A- Physical, B- Chemical, C- chemical, D- Physical

Explanation:

A is physical because you can see it changing its form is changing.

B is Chemical because a new substance is formed creating the orange color of rust.

C is a Chemical reaction because it is being broken down so the banana itself is changing not just how we see it.

D is physical because we are just changing the shape/ size of the item, not anything to do with its substances.

motikmotik2 years ago
8 0

Answer:

a. physical change, it is reverse reversible since no new substance is created.

b.chemical change, The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust.

c. chemical change, Bananas contain compounds known as polyphenol oxidases and iron-containing chemicals. These chemicals react with oxygen to turn the fruit brown.

d. physical change, there is no new substance created, and there is no change in the original composition of wood.

You might be interested in
Which of the following elements has properties different than the rest? **easy** BRAINLIEST!!!
Yanka [14]

Answer:

Sulfur/S

Explanation:

5 0
3 years ago
Read 2 more answers
2. Which is NOT true? Higher temperatures are indications of higher average kinetic energy. Temperature is a measure of the aver
kirza4 [7]

"As the molecules in a sample move faster the temperature reading will be lower" is not true.

8 0
3 years ago
Arrange the following compounds in decreasing order of acidity from left to right, and explain the reason in less than 90 words.
saveliy_v [14]

Explanation:

More is the electronegativity of atoms attached to the alpha carbon atom more will be the attraction of electron towards it. As a result, release of hydrogen ion will be easier.

Therefore, there will be increased in acidity of the compound.

Since, fluorine, chlorine and bromine are all group 17 elements and fluorine is more reactive than chlorine. On the other hand, chlorine is more reactive than bromine.

Hence, ability to attract the electrons towards itself will be maximum in fluorine and least in bromine.

Therefore, decreasing order of acidity of the given compounds is as follows.

        CF_{3}COOH >  CCl_{3}COOH > CBr_{3}COOH > CH_{3}COOH

8 0
3 years ago
if you have something with a mass of 45g and a volume of 5mL, what is that object’s density? How do you determine its density?
Lostsunrise [7]

Answer:

use the  Density Calculator uses the formula , or density  is equal to mass divided by volumeThe calculator can use any two of the values to calculate the third. Density is defined as mass per unit volume.

Explanation:

8 0
3 years ago
Read 2 more answers
What mass of titanium chloride reacts with 460 g of sodium?
monitta

Answer:

771.15g of TiCl4

Explanation:

460 grams of sodium=20 mol

equation of the reaction is TiCl4+4NA=4NaCl+Ti

1 mol of titanium chlroide reacts with 4. that means there are 5 mols of titanium chloride

titanium chloride has a molar mass of 154.23 g.

mutiply that by 5 and we have 771.15 g

5 0
3 years ago
Other questions:
  • Four moles of Argon gas are at a pressure of 1.90 atm, and the temperature is 50 degrees C. What is the volume of the gas?
    14·1 answer
  • A sample of gas has an initial volume of 3.88 l at a pressure of 707 mmhg . part a if the volume of the gas is increased to 5.43
    10·1 answer
  • When a bottle of soft drink is shaken violently, CO2 gas escapes from solution and
    6·1 answer
  • Steve is performing a titration, where a base is at an unknown concentration. What should he choose as his indicator solution?St
    7·1 answer
  • What is the first stage of speciation
    9·2 answers
  • A single gold atom has a mass of 197.0 amu. How many gold atoms are in a cube of gold that is 10.0 mm on each side (about the si
    10·1 answer
  • 4.13 moles of chromium (III) nitride weighs how much?
    15·1 answer
  • Characteristics of an atom
    6·1 answer
  • If there is 3% freshwater available on earth, approximately what percentage of it is in ice?
    6·2 answers
  • The unit used to measure the diameter of an atom is an?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!