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
spin [16.1K]
3 years ago
13

Someone help please i cant figure this out

Chemistry
1 answer:
xenn [34]3 years ago
3 0

Answer: 2 : 1

Explanation:

Cation :

Ca - calcium = atomic number = 20

Electron dot configuration : 2, 8, 8, 2

Ca losses 2 electrons in its outermost shell and thus has a charge of 2+ in other to attain a stable octet state.

Anion:

F - has 7 valence electrons and thus needs 1 electron to achieve a stable octet state, hence it accepts one electron has has a charge of (-1)

Therefore,

Ratio of cation (+) to negative (-) = 2 :1

You might be interested in
The process by which plants give off water vapor into the air is
kaheart [24]

Answer:transpiration

Explanation:

The water eventually is released to the atmosphere as vapor via the plant's stomata — tiny, closeable, pore-like structures on the surfaces of leaves. Overall, this uptake of water at the roots, transport of water through plant tissues, and release of vapor by leaves is known as transpiration.

3 0
3 years ago
Which of the following are subatomic particles? Select all that apply.
Viefleur [7K]

Answer:

Protons, Neutrons, and Electrons

Explanation:

About Subatomic particles: Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons.

3 0
4 years ago
Read 2 more answers
HELP PLEASE HELP ME!
miss Akunina [59]

Answer:

I can´t see, it isnt clear

Explanation:

8 0
3 years ago
A mixture of 0.220 moles CO, 0.350 moles H2 and 0.640 moles He has a total
emmasim [6.3K]

Answer:

P(H₂) = 0.8533 atm

Explanation:

n(CO) = 0.220 mole

n(H₂)  = 0.350 mole

n(He) = 0.640 mole

_______________

∑ n  =  1.210 moles

mole fraction => X(H₂) = 0.350/1.210 = 0.2892

Dalton's Law of Partial Pressures => P(H₂) = X(H₂)·P(ttl) = 0.2892(2.95 atm) = 0.8533 atm

6 0
3 years ago
How does this data provide evidence for base pairing in dna
USPshnik [31]

Answer:

There are chemical cross-links between the two strands in DNA, formed by pairs of bases. They always pair up in a particular way, called complementary base pairing: thymine pairs with adenine (T–A) guanine pairs with cytosine (G–C)

Explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

8 0
3 years ago
Other questions:
  • True or False? Elements in the same row have similar properties. Question 4 options: True False
    11·2 answers
  • Lewis dot structure for F2(g)
    7·1 answer
  • When trying to determine whether or not an atom gives up electrons easily, do chemists look at electronegativity or ionization p
    7·1 answer
  • [Need answers with steps right away!]
    9·1 answer
  • Suppose an electron is transferred from a potassium atom to an unknown halogen atom. For which of the following halogen atoms wo
    11·1 answer
  • The act of changing something but not being able to change it back
    8·1 answer
  • What are all synthetic materials made from?
    13·1 answer
  • Which three forces can affect an object without contact?
    8·1 answer
  • Study Guide for Unit 3<br> 1. Most rocks<br> are a mixture of what?
    12·1 answer
  • A 5. 0 l flask containing o2 at 2. 00 atm is connected to a 3. 0 l flask containing h2 at 4. 00 atm and the gases are allowed to
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!