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
zmey [24]
3 years ago
14

the decomposition of calcium carbonate to calcium oxide and carbon dioxide only takes place at very high temperatures, making th

e direct measurement of h for this reaction difficult. both calcium carbonate and calcium oxide react readily with dilute hydrochloric acid at room temperature
Chemistry
1 answer:
USPshnik [31]3 years ago
4 0
So calculate the H for the other two reactions a room temperature and combine the reactions to calculate the H of the decomposition of calcium carbonate using the Hess's Law
You might be interested in
A boy weighs 525 N. What is his mass?
MAXImum [283]

Answer:≈40.8 kg.

Explanation:

4 0
3 years ago
Distinguish between mass and weight
yKpoI14uk [10]

Answer:

There is a basic difference, because mass is the actual amount of material contained in a body and is measured in kg, gm, etc. Whereas weight is the force exerted by the gravity on that object mg. Note that mass is independent of everything but weight is different on the earth, moon, etc.

3 0
3 years ago
Read 2 more answers
Write down all the food chains that start with the blackberry and end with the hawk.
Roman55 [17]
Blackberry - rabbit - snake - owl - hawk<span>
</span>
6 0
3 years ago
Calculate the pH of a solution that is 0.235M benzoic acid and 0.130M sodium benzoate, a salt whose anion is the conjugate base
lesantik [10]

Hello!

We have the following data:

ps: we apply Ka in benzoic acid to the solution.

[acid] = 0.235 M (mol/L)

[salt] = 0.130 M (mol/L)

pKa (acetic acid buffer) =?

pH of a buffer =?

Let us first find pKa of benzoic acid, knowing that Ka (benzoic acid) = 6.20*10^{-5}

So:

pKa = - log\:(Ka)

pKa = - log\:(6.20*10^{-5})

pKa = 5 - log\:6.20

pKa = 5 - 0.79

\boxed{pKa = 4.21}

Now, using the abovementioned data for the pH formula of a buffer solution or (Henderson-Hasselbalch equation), we have:

pH = pKa + log\:\dfrac{[salt]}{[acid]}

pH = 4.21 + log\:\dfrac{0.130}{0.235}

pH = 4.21 + log\:0.55

pH = 4.21 + (-0.26)

pH = 4.21 - 0.26

\boxed{\boxed{pH = 3.95}}\end{array}}\qquad\checkmark

Note:. The pH <7, then we have an acidic solution.

I Hope this helps, greetings ... DexteR! =)

8 0
3 years ago
Why is lithium used in the body?
Veronika [31]

Answer:

Lithium is used to treat mania that is part of bipolar disorder (manic-depressive illness). It is also used on a daily basis to reduce the frequency and severity of manic episodes.

8 0
3 years ago
Other questions:
  • What keeps the weather along the north and south Carolina coats milder
    8·1 answer
  • How many grams of NH3 can be produced from the reaction of 28g of N2 and 25g of H2?
    11·1 answer
  • What are members one through six of the alkyne family
    11·1 answer
  • Which statements correctly describe atmospheric pressure?
    10·1 answer
  • HEY Plzzzzzzzzzzz HELP ILL GIVE BRAINLIEST ASAPPPPPPPPPPP
    11·1 answer
  • How many internal parts or “organelles” are there in a plant cell?<br> please i need a answer!
    5·1 answer
  • What body organ is carbon dioxide waste excreted from
    11·1 answer
  • How many electrons does hydrogen need in order to have a full shell of valence electrons?
    10·1 answer
  • why might you find fossil evidence of both an ocean and a forest at different depths in the same location??
    14·1 answer
  • A 4.7-L sealed bottle containing 0.33 g of liquid ethanol,C₂H₆O, is placed in a refrigerator and reaches equilibrium with its va
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!