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worty [1.4K]
2 years ago
10

When 500 g of water is cooled from 80.0°C to 10.0°C, how much heat energy is lost?

Chemistry
2 answers:
vampirchik [111]2 years ago
6 0

I don’t know

Explanation:

Rashid [163]2 years ago
4 0
This is a solved problem that is close I cannot tell u the direct answer but I hope this STEP BY STEP layout will help

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A student prepares a 0.47mM aqueous solution of acetic acid CH3CO2H. Calculate the fraction of acetic acid that is in the dissoc
Aliun [14]

The fraction of acetic acid that is dissociated is 0.18

Why?

The chemical equation for the dissociation of acetic acid (HAc) is the following:

HAc(aq) + H₂O(l) ⇄ H₃O⁺(aq) + Ac⁻(aq)

To find the fraction of acetic acid that is in the dissociated form (f), we apply the following equation (Ka for acetic acid is 1.76*10⁻⁵). This equation comes from solving the equation of the equilibrium constant for the dissociated fraction of HAc:

f=\frac{-Ka+\sqrt{Ka^{2} +4KaC} }{2C} = 0.18

Have a nice day!

#LearnwithBrainly

6 0
3 years ago
How many particles are in a 151 g sample of Li2O?
neonofarm [45]

Answer:

3.052 × 10^24 particles

Explanation:

To get the number of particles (nA) in a substance, we multiply the number of moles of the substance by Avogadro's number (6.02 × 10^23)

The mass of Li2O given in this question is as follows: 151grams.

To convert this mass value to moles, we use;

moles = mass/molar mass

Molar mass of Li2O = 6.9(2) + 16

= 13.8 + 16

= 29.8g/mol

Mole = 151/29.8g

mole = 5.07moles

number of particles (nA) of Li2O = 5.07 × 6.02 × 10^23

= 30.52 × 10^23

= 3.052 × 10^24 particles.

4 0
2 years ago
Is a mixture of toys a substance or homogeneous and heterogeneous mixture
Aleonysh [2.5K]

Answer:

homogeneous

Explanation:

one type of molecules

6 0
3 years ago
9. The “power plant” of the cell is the
Daniel [21]

Answer:

D. Mitochondria

Explanation:

The mitochondria, labeled the powerhouse of the cell, are the organelle responsible for energy production within the cell

8 0
2 years ago
Read 2 more answers
Help with this question for chemistry!!
wel
Emperic formula is SO subscript 2. Molecular formula would be SO subscript 2 multiply 1 so it's the same answer.
7 0
3 years ago
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