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
Elza [17]
3 years ago
5

How many ions form when 39 grams of calcium fluoride are added to excess water? a. 0.50 mol b. 1.0 mol c. 1.5 mol d. 3.0 mol

Chemistry
2 answers:
Sladkaya [172]3 years ago
7 0

Answer:

1.5 mol ions

Explanation:

agasfer [191]3 years ago
6 0

Answer:

c. 1.5 mol

Explanation:

  • Firstly, we need to calculate the no, of moles of 39.0 grams of calcium fluoride.

n = mass / molar mass = (39.0 g) / (78.07 g/mol) = 0.499 mol ≅ 0.5 mol.

  • CaF₂ ionized in water as:

<em>CaF₂ → Ca⁺² + 2F⁻.</em>

Every 0.1 mole of CaF₂ is ionized to 3 ions (1 ion of Ca⁺² and 2 ions of F⁻).

<em>So, 0.5 mol of CaF₂ will contain (3 x 0.5 mol = 1.5 mol) of ions.</em>

Thus, the right choice is "c. 1.5 mol".

You might be interested in
If a person did overshoot the endpoint, would this cause the experimental value for the % of acid in vinegar to be too high or t
Stels [109]
OHHHHHHHHH MYYYYYYYYYYYYY GOOOOOOODDDDDDDDDDDD

7 0
3 years ago
What is the percentage sodium in sodium oxide
Alekssandra [29.7K]
<span>
Sodium Oxide= Na2O
The formula mass of Na2O is (2x23) + 16 = 62g/mol

% Na= (46/62) x 100 = 74%
% O= (16/62) x 100 = 26%</span><span>
</span>
4 0
3 years ago
Read 2 more answers
2. In the reaction NO + NO2 ⇌ N2O3, an experiment finds equilibrium concentrations of [NO] = 3.8 M, [NO2] = 3.9 M, and [N2O3] =
notsponge [240]
Kc= concentration  of  product  divided  by  concentration   of  reactant
NO +  NO2  ---->  N2O3

Kc =(N2O3)  /  (No)(NO2)

Kc= ( 1.3  )/{ (3.9)(3.8) }

Kc=0.088 (  answer  B)
4 0
3 years ago
Read 2 more answers
A 4,000 mL solution of AgNO3 contains 17.00 g of solute in water. Calculate the molar concentration of the solution.
blsea [12.9K]
The molarity is moles/liters.

First, convert 4,000 mL to L:

4000 mL --> 4 L

Now, you must convert the 17 g of solute to moles by dividing the number of grams by the molar mass. The molar mass of AgNO3 is <span>169.87 g/mol:

17 / 169.87 = .1

Now that you have both the number of moles and the liters, plug them into the initial equation of moles/liters:

.1/4 = .025</span>
3 0
3 years ago
Read 2 more answers
Given the following balanced equation, determine the rate of reaction with respect to [SO2].
Gnoma [55]

Answer:

Rate = -1/2 Δ[SO<sub>2</sub>]/Δt

so its gonna be (in more simple terms) rate= -1/2Δ(SO2)/Δt

Explanation:

7 0
3 years ago
Other questions:
  • Without doing any calculations, determine which mass is closest to the atomic mass of carbon. without doing any calculations, de
    11·1 answer
  • Can anyone help with this?
    7·1 answer
  • Why does a newly opened can of warm soda have less carbonation than a newly opened can of cold soda?
    10·1 answer
  • A strong acid OR base is one that:
    12·1 answer
  • Which fuel is better renewable or non-renewable fuel and give a reason why
    15·1 answer
  • Senthil wants to make a fabric that can substitute silk. Name the fabric that substitutes silk and explain the process of prepar
    10·1 answer
  • Which would increase the rate of dissolving salt into water?
    15·1 answer
  • What makes up an isotope’s mass number?
    13·1 answer
  • The drawing below was sketched by a student who was observing cells under a microscope. The cell is classified as
    8·1 answer
  • **URGENT!!*** Compare lithium (Li) in group Ia (1) to fluorine (F) is in group VIIa (17). Does each element want to give or take
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!