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
Citrus2011 [14]
2 years ago
12

Atoms of the most reactive elements tend to have

Chemistry
2 answers:
kaheart [24]2 years ago
4 0
One or seven valance electons
Zolol [24]2 years ago
3 0

Answer choices:

A. one or seven valence electrons

B. eight valence electrons

C. four or five valence electrons

D. no valence electrons.

The answer is most likely A. one or seven valence electrons

You might be interested in
Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points. nh4cl cobr3 k2so
Illusion [34]
Answer: CoBr3 < K2SO4 < NH4 Cl

Justification:

1) The depression of the freezing point of a solution is a colligative property, which means that it depends on the number of particles of solute dissolved.

2) The formula for the depression of freezing point is:

ΔTf = i * Kf * m

Where i is the van't Hoof factor which accounts for the dissociation of the solute.

Kf is the freezing molal constant and only depends on the solvent

m is the molality (molal concentration).

3) Since, you are assuming equal concentrations and complete dissociation of the given solutes, the solute with more ions in the molecular formula will result  in the solution with higher depression of the freezing point (lower freezing point).

4) These are the dissociations of the given solutes:

a) NH4 Cl (s) --> NH4(+)(aq) + Cl(-) (aq) => 1 mol --> 2 moles

b) Co Br3 (s) --> Co(3+) (aq) + 3Br(-)(aq) => 1 mol --> 4 moles

c) K2SO4 (s) --> 2K(+) (aq) + SO4 (2-) (aq) => 1 mol --> 3 moles

5) So, the rank of solutions by their freezing points is:

CoBr3 < K2SO4 < NH4 Cl
4 0
3 years ago
Read 2 more answers
Help in chem please!!!!!!
IgorLugansk [536]

This is a one-step unit analysis problem.  Since we are staying in moles, grams of our compound, and thus molar mass, is not needed.

1 mole is equal to 6.022x10²³ particles as given, so:

1.5x10^{24} particles FeO_{2} (\frac{1mol}{6.022x10^{23}particles } )=2.49 molFeO_{2}

<h3>Answer:</h3>

2.49 mol

Let me know if you have any questions.

3 0
3 years ago
This chart shows the experimental design of four students who are all observing what kind of bird seed birds tend to eat more of
ki77a [65]

Answer:Student 2

Explanation:

Student 2 repeated the experiment several times with different seeds to make sure the experiment would come out with the same answers and was reliable, using the same area would make sure the environment wouldn't interfere. The other students didn't do all the things that student 2 needed for the experiment.

4 0
3 years ago
Read 2 more answers
What process forms an image in a mirror? Choices: A. absorbing light B. Reflecting light C. Refracting light D. Transmitting lig
Dafna1 [17]

Answer

Using the law of reflection—the angle of reflection equals the angle of incidence—we can see that the image and object are the same distance from the mirror. This is a virtual image, since it cannot be projected—the rays only appear to originate from a common point behind the mirror.

Explanation:

Hope this helps someone

4 0
2 years ago
A beaker with a pale liquid in it massed 84.2 grams on a digital balance. Its volume read 42mL
ipn [44]

Answer:

320 ml

Explanation:

4 0
3 years ago
Other questions:
  • 294 g of potassium dichromate contains 52 g of chromium and 39 g of potassium. What is the mass percent of oxygen in the compoun
    11·1 answer
  • Consider the perbromate anion. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central a
    10·1 answer
  • A saturated solution of barium chloride at 30 degrees Celsius contains 150 g water. How much additional barium chloride can be d
    10·1 answer
  • The equilibrium constant for the reaction
    13·1 answer
  • What is the value for the potential energyfor a n = 6 Bohr orbit electron in Joules?
    10·1 answer
  • I have 2 questions:
    10·2 answers
  • What volume of a 0.580-m solution of cacl2 contains 1.28 g solute?
    12·1 answer
  • In the waves lab, you changed ______ to see how it would affect wave speed.
    15·2 answers
  • True or False
    14·2 answers
  • 40.0 g of ice cubes at 0.0°C are combined with 150. g of liquid water at 20.0°C in a coffee cup calorimeter. Calculate the final
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!