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
schepotkina [342]
3 years ago
11

Which statement best describes the properties of ionic compounds? They are brittle, solid at room temperature, and have a high m

elting point. They are always composed of an equal proportion of cations to anions. They mostly have low melting and boiling points. They are good conductors of heat and electricity and are ductile and malleable.
Chemistry
2 answers:
djverab [1.8K]3 years ago
6 0
They are good conductors of heat and electricity.

They are solid at room tempature

They have a high melting point
Aleks04 [339]3 years ago
4 0
The answer is the first one! 

I hope this helps. :)
You might be interested in
What are the coinage elements ?
kupik [55]

The elements of a coin.

7 0
3 years ago
Which of the following is a unit of volume of solids?
Anika [276]

Answer:

<h3>,,,,,,Cubic meters ,,,</h3><h3 />
7 0
3 years ago
Which of the following organism are most likely to show cospeciation?
Viktor [21]
The answer is A: fleas and cats.
3 0
3 years ago
A chemist wishing to do an experiment requiring 47-Ca2+ (half-life = 4.5 days) needs 5.0 μg of the nuclide. What mass of 47-CaCO
NARA [144]

Answer:

5.8μg

Explanation:

According to the rate or decay law:

N/N₀ = exp(-λt)------------------------------- (1)

Where N = Current quantity,  μg

            N₀ = Original quantity, μg

             λ= Decay constant day⁻¹

              t =  time in days

Since the half life is 4.5 days, we can calculate the  λ from (1) by  substituting N/N₀ = 0.5

0.5 = exp (-4.5λ)

ln 0.5  = -4.5λ

-0.6931 = -4.5λ

λ =   -0.6931 /-4.5

  =0.1540 day⁻¹

Substituting into (1)  we have :

N/N₀ = exp(-0.154t)----------------------------- (2)

To receive 5.0 μg of the nuclide with a delivery time of 24 hours or 1 day:

N = 5.0 μg

N₀ = Unknown

t = 1 day

Substituting into (2) we have

[5/N₀]   = exp (-0.154 x 1)

    5/N₀        = 0.8572

N₀  =  5/0.8572

     =    5.8329μg

    ≈     5.8μg

The Chemist must order 5.8μg  of 47-CaCO3

6 0
2 years ago
PLEASE HELP WITH ALL
Gala2k [10]

Answer:

Question 1: D

Question 2: B C E F

Question 3: A

Question 4: A

Question 5: A

5 0
3 years ago
Read 2 more answers
Other questions:
  • 58:15
    10·1 answer
  • CaO(s) + 2 NH4Cl(s) = 2 NH3(g) + H2O(g) + CaCl2(s)
    5·1 answer
  • Carbon-14 is the typical radioisotope used to date materials; however it has limitation to 40000 years a scientist who wants to
    5·1 answer
  • What does the number below each element's symbol represent?
    7·2 answers
  • Name the compound
    15·1 answer
  • When heated a sample consisting of only CaCO3 and MgCO3 yields a mixture of CaO and Mgo. If the weight of the combined oxides is
    11·1 answer
  • Write the balanced neutralization reaction that occurs between H 2 SO 4 and KOH in aqueous solution. Phases are optional. neutra
    15·1 answer
  • What is the molarity of a solution of 3 moles of FeBr3 in 1/2L of water
    9·1 answer
  • Questlon 23 of 30
    12·1 answer
  • In the reaction, Hydrogen + Iodine --&gt; Hydrogen Iodide at equilibrium, some Iodine is is added. What happens to the equilibri
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!