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
just olya [345]
2 years ago
14

A calcium atom has 20 protons, 20 electrons, and 20 neutrons. When calcium forms a positive two ion it's new composition is

Chemistry
1 answer:
miss Akunina [59]2 years ago
6 0

Answer:

40

Explanation:

I'm not sure

You might be interested in
g Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no r
Mrac [35]

Answer:

CuBr₂(aq) + Pb(CH₃COO)₂(aq) → Cu(CH₃COO)₂(aq) + PbBr₂ (s)↓

Explanation:

We identify the reactants:

CuBr₂ and Pb(CH₃COO)₂

The products will be: Cu(CH₃COO)₂ and PbBr₂

You may know these information:

Salts from acetate are soluble.

Bromide can make solid salts with these cations: Ag⁺, Pb²⁺, Hg₂²⁺, Cu⁺

PbBr₂ is formed, so this will be our precipitate

The equation is:

CuBr₂(aq) + Pb(CH₃COO)₂(aq) → Cu(CH₃COO)₂(aq) + PbBr₂ (s)↓

8 0
3 years ago
A complete soil profile includes three layers—
Rama09 [41]
It is topsoil, subsoil, and parent material
3 0
3 years ago
Read 2 more answers
Opening a can of paint requires a screwdriver or other machine to pry open the lid. how does a screwdriver affect the force appl
joja [24]
<span>Opening a can of paint requires a screwdriver or other machine to pry open the lid. The screwdriver affect the force applied to opening the lid.  The answer is :  </span><span>B.  It increases the applied force and changes its distance and direction.</span>
7 0
3 years ago
Read 2 more answers
5) O etanol C2H6O, combustível produzido em grande escala no Brasil, pode ser obtido pela fermentação da sacarose C12H22O11 enco
UNO [17]

Answer:

a) 0.15

Explanation:

A concentração de sacarose é 0,15 g / l no etanol. O Brasil está produzindo etanol em grandes quantidades que é usado como combustível em veículos e indústrias. Este etanol é produzido a partir da cultura da cana-de-açúcar e o Brasil é o segundo maior produtor mundial com cerca de 34,45 bilhões de litros em 2019. Os Estados Unidos da América e o Brasil produzem cerca de 84% do etanol mundial.

3 0
3 years ago
A spectral line has a wavelength of 7.35 *10-7 m. What is the energy of this radiation?
antoniya [11.8K]

Answer:

2.7 x 10^-19 J

Explanation:

The formula needed for this problem is

E = hν

where E = energy, h = Planck's constant = 6.626x10^-34 and ν is the frequency

c = λν

where c = speed of light = 3x10^8, and λ = wavelength

3x10^8 = 7.35x10^-7 . ν

ν = 4.08 x 10^14 Hz

E = 6.626x10^-34 . 4.08x10^14 = 2.7 x 10^-19 J

8 0
3 years ago
Other questions:
  • How is the frequency of an EM wave related to its energy
    14·2 answers
  • The molecular mass of the compound is 132 amu. What is the molecular formula?
    9·1 answer
  • A sample of fluorine gas occupies 810 milliliters at 270 K and 1.00 atm. What volume does the gas occupy when the pressure is do
    13·2 answers
  • 1. What controls the cell?<br><br> 2. Calls can be many ____ and _____
    7·1 answer
  • Τhe enthalpy of vaporization of ammonia is 23.35 kJ/mol at its boiling point (–33.4°C). Calculate the value of ∆S when 1.00 mole
    15·1 answer
  • This is when water freezes, expands, pushing the rock apart slowly over a period<br> of time.
    10·1 answer
  • What is the name of this hydrocarbon?
    8·2 answers
  • 8. Which is a nonrenewable resource?
    8·2 answers
  • Please answer this. List the three most abundant minerals in this bottle of mineral water.​
    14·1 answer
  • I NEED HELP FAST PLEASE<br> *please answer correctly* <br><br> Will mark brainliest thank you!!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!