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
Liono4ka [1.6K]
3 years ago
10

Which of these best show a physical change?​

Chemistry
1 answer:
Angelina_Jolie [31]3 years ago
6 0

Answer:

D

Explanation:

You might be interested in
Materials
nikitadnepr [17]

Answer:

Limestone caves are formed when acid rain occurs.

Explanation:

When chalk pieces which is made of calcium carbonate react with acetic acid, it produces carbon dioxide, calcium acetate, and water. When calcium carbonate react with Carbonated Water produces calcium bicarbonate. Limestone cave forms when the dissolution of limestone occur when rainwater which is acidic due to the addition of carbondioxide in the air react with limestone. This dissolution removes the lime from the rock and caves are formed.

8 0
3 years ago
What is a cation and where can you find it on the periodic table?
Maslowich

Answer:

A cation is an ion with fewer electrons than protons. Therefore, it has a positive charge. The electric charge on a proton is equal in amount to the charge on an electron. Anions are atoms or radicals (groups of atoms), that have gained electrons. Since they now have more electrons than protons, anions have a negative charge. Halogens always form anions, alkali metals and alkaline earth metals always form cations. Most other metals form cations (e.g. iron, silver, nickel), whilst most other nonmetals typically form anions (e.g. oxygen, carbon, sulfur).

Explanation:

An anion and cation cannot be specifically found on the periodic table.    

4 0
2 years ago
Determine the mole ratio between oxygen and water for the following equation:
vodka [1.7K]

Answer:2.2

Explanation:

5 0
2 years ago
Please help me would really appreciate it thank you :)
tatyana61 [14]

Answer:

e. 8.04*10^4

Explanation:

80.4 g converted to mg is 80,400. 8.04*10^4= 80,400

4 0
2 years ago
You are given a solution of HCOOH (formic acid) with an approximate concentration of 0.20 M and you will titrate this with a 0.1
jeka57 [31]

Answer:

\boxed{\text{36 mL}}

Explanation:

1. Write the balanced chemical equation.

\rm HCOOH + NaOH $ \longrightarrow$ HCOONa + H$_{2}$O

2. Calculate the moles of HCOOH

\text{Moles of HCOOH} =\text{20.00 mL HCOOH } \times \dfrac{\text{0.20 mmol HCOOHl}}{\text{1 mL HCOOH}} = \text{4.00 mmol HCOOH}

3. Calculate the moles of NaOH.

\text{Moles of NaOH = 4.00 mmol HCOOH } \times \dfrac{\text{1 mmol NaOH} }{\text{1 mmol HCOOH}} = \text{4.00 mmol NaOH}

4. Calculate the volume of NaOH

c = \text{4.00 mmol NaOH } \times \dfrac{\text{1 mL NaOH }}{\text{0.1105 mmol NaOH }} = \textbf{36 mL NaOH }\\\\\text{The titration will require }\boxed{\textbf{36 mL of NaOH}}

3 0
3 years ago
Other questions:
  • What two elements of the Linnaean system make up an organisms scientific name
    11·1 answer
  • According to the Rutherford model of the atom, positive charge is where?
    11·2 answers
  • How many protons z and how many neutrons n are there in a nucleus of the most common isotope of silicon, 2814si? separate your a
    13·1 answer
  • Marina is creating a flow chart of the mechanics of mantle convection and how it relates to tectonic plate movement.
    11·2 answers
  • The radioisotope that has the longest half-life is the best to use in powering planet and space exploration vehicles because the
    6·2 answers
  • Need help asap!!!
    11·1 answer
  • According to newtons 3rd law, an action creates​
    11·1 answer
  • Anyone really good with Organic chemistry
    10·1 answer
  • How do I connect a nuclear transfer pipe to an energy condenser that is connected to a tessoract?
    14·2 answers
  • What type of volume is solid
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!