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Alex787 [66]
3 years ago
7

Summarize Hooke's observations of cork under the microscope

Chemistry
1 answer:
ratelena [41]3 years ago
7 0

Answer:

I don't know

Explanation:

pls I need a little bit answer

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The K sp for barium fluoride, BaF2, is 2.45 × 10-5. What is the molar solubility of barium fluoride?
lilavasa [31]

Answer: The molar solubility of barium fluoride is 0.0183 moles/liter.

Explanation:

The equation for the reaction will be as follows:

BaF_2\rightarrow Ba^{2+}+2F^

By Stoichiometry,

1 mole of BaF_2 gives 2 moles of F^- and 1 mole of Ba^{2+}

Thus if solubility of BaF_2 is s moles/liter, solubility of Ba^{2+} is s moles/liter and solubility of F^- is 2s moles/liter

Therefore,  

K_sp=[Ba^{2+}][F^{-}]^2

2.45\times 10^{-5}=[s][2s]^2

4s^3=2.45\times 10^{-5}

s^3=6.12\times 10^{-6}moles/liter

s=0.0183moles/liter

Thus the molar solubility of barium fluoride is 0.0183 moles/liter.

8 0
3 years ago
The heat of vaporization of water is 2,260 J. How much energy is released when 20 grams of steam is condensed at 100°C? *
gulaghasi [49]

Answer:

45200J

Explanation:

Given parameters:

Heat of vaporization of water  = 2260J/g

Mass of steam = 20g

Temperature = 100°C

Unknown:

Energy released during the condensation  = ?

Solution:

This change is a phase change and there is no change in temperature

To find the amount of heat released;

          H  = mL

m is the mass

L is the latent heat of vaporization

 Insert the parameters and solve;

          H  = 20g x 2260J/g

           H = 45200J

5 0
3 years ago
Which of the following are needed to calculate the percent yield? Select all that apply. Question 10 options: Theoretical yield
Ivahew [28]

Both theoretical and actual yields would be needed to calculate percent yield.

The percent yield of a reaction is defined as the ratio of the actual yield to that of the theoretical yield. It can be mathematically expressed as:

percent yield = actual yield/theoretical yield x 100%

The actual yield is the amount of a specific product produced from a reaction while the theoretical yield is the stoichiometric amount of the same product.

More on percent yield can be found here: brainly.com/question/2506978?referrer=searchResults

6 0
2 years ago
What is the chemical name for LiC2H3O2 or C2H3O2Li
bixtya [17]

Answer:

AWAWDWDAD

Explanation:

3 0
3 years ago
Reaction rates are affected by how often the particles collide<br><br> true<br><br> false
SIZIF [17.4K]
This is true.

The reaction rates are affected by how often the particles collide.
4 0
4 years ago
Read 2 more answers
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