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
Yuri [45]
3 years ago
5

Please write a essay and pick one prompt and at least half a page long thank you!

Chemistry
1 answer:
MArishka [77]3 years ago
3 0
Changes in matter occur every day. There are two types of ways matter can be altered; physically and chemically. Physical changes do not change the composition of the matter while chemical changes occur when one or more substances turn into a completely new substance. Physical changes can be seen through an altering of the substances physical property. A substances physical property is observed and measured without changing the composition of the subject. Descriptive words that would help to identify a substance’s physical property include hard, soft, brittle, flexible, heavy, and light just to name a few. Let’s say you’re eating, throughout the day your stomach starts to growl that is what happens when your stomach is digesting your food. Digestion is an example of chemical change. Chemical change happens every day and more than half the time we don’t realize it whether it’s metal starting to rust, or our food starting to rot. Physical change can happen when your popsicle starts to melt, or your water starting starting to boil. These are examples of physical change.
You might be interested in
What is the percent change when an iodine atom (I) becomes an ion (I-)?
VashaNatasha [74]
What do you mean by this question?
4 0
3 years ago
3
xxMikexx [17]

Answer:

its sunspots :)

Explanation:

can i pleasee have the brainiest tyty

for my rank

6 0
3 years ago
Which isotope has the greatest number of protons?
tino4ka555 [31]

Answer:

The isotope with the greatest number of protons is:

  • <u>option D:  Pu-239, with 94 protons</u>

Explanation:

The number of <em>protons</em> is the atomic number and is a unique number for each type of element.

You can tell the number of protons searching the element in a periodic table and reading its atomic number.

Thus, this is how you tell the number of protons or each isotope

Sample       Chemical symbol  Element       atomic number   # of protons

A Pa-238       Pa                         protactinium         91                        91

B U-240         U                          uranium                 92                       92

C Np-238       Np                        neptunium            93                       93

D Pu-239        Pu                        plutonium              94                       94

8 0
3 years ago
you are given mixtures containin gthe following compounds. Which compound in each pair could be separated by stirring the solid
ExtremeBDS [4]

Answer:

(A) NaOH and Ca(OH)2: Ca(OH)2

(B) MgCl2 and MgF2: MgF2

(C) Agl and KI: AgI

(D) NH4Cl and PbCl2: PbCl2

Explanation:

We need to see the solubility in water, at similar temperatures, for each compound and see which one is less soluble than the other:

NaOH: 1000 g/L (25 °C)

Ca(OH)2: 1.73 g/L (20 °C)

MgCl2: 54.3 g/100 mL (20 °C)

MgF2: 0.013 g/100 mL (20 °C)

Agl: 3×10−7g/100mL (20 °C)

KI: 140 g/100mL (20 °C)

NH4Cl: 383.0 g/L (25 °C)

PbCl2: 10.8 g/L (20 °C)

After the comparison made we can conclude that the less soluble, after saturation of water, will precipitate first.

3 0
4 years ago
HELP ASAP PLZZZZZZZZ
mash [69]

Answer:

ans : C

..............

8 0
3 years ago
Other questions:
  • Using the solubility curve, what is the effect of increased temperature on the solubility of KBr in 100 grams of water? The solu
    12·2 answers
  • Which of the following is an oxidation half-reaction?
    5·1 answer
  • For the reaction 2N 2O(g) ⇌ O 2(g) + 2N 2(g), what happens to the equilibrium position if the pressure increases?
    12·1 answer
  • Which subatomic particle is involved in the covalent and ionic bonding processes? A. protons B. electrons C. Nucleus D. neutrons
    8·2 answers
  • plants use carbohydrates to build things such as cellulose. How do plants acquire these building blocks to build Mass.
    11·1 answer
  • Какая система называется моделью химия
    7·2 answers
  • Which of the following is a compound? <br> a. air <br> b. soda <br> c. sterling silver <br> d. water
    6·1 answer
  • Which of the following is the least reactive non
    15·1 answer
  • 2.38g of black copper(iii) oxide is completely reduced to by hydrogen to give copper and water. What are the number of atoms of
    8·1 answer
  • Which change would most likely increase the resistance in the circuit ?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!