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bazaltina [42]
3 years ago
7

What is a weak acid?

Chemistry
1 answer:
Helen [10]3 years ago
4 0

Answer:

B

Explanation:

strong acids ionize completely in water

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The combustion of toluene has a δerxn of −3.91 × 103kj/mol. when 1.55 g of toluene (c7h8) undergoes combustion in a bomb calorim
maw [93]

Answer: The heat capacity of the bomb calorimeter is 2.84 kJ/g^oC.

Explanation:

\Delta H_{reaction}=-3.91\times 10^3 kJ/mol=-3.91\times 10^6 J/mol(1kJ=1000J)

Given mass of toluene = 1.55 g

Number of moles of Toluene:

=\frac{\text{Given mass of toluene}}{\text{Molecular mass of toluene}}=\frac{1.55}{92.14 g/mol}=0.0168 moles

Energy required by 0.0168 moles of toluene=\Delta H_{reaction}\times 0.0168 moles=-3.91\times 10^6 J/mol\times 0.0168 mol=-0.065688\times 10^6 J

Since heat released on combustion of 0.0168 moles toluene, this heat will get absorbed by the bomb calorimeter ,then (Q) will be:

Q=0.065688\times 10^6 J

\Delta T= 37.92^oC-23.02^oC=14.9^oC

Q=mc\Delta T=0.065688\times 10^6 J=1.55 g\times c \times (14.9^oC)

c=2.84\times 10^3 J/g^oC=2.84 kJ/g^oC

The heat capacity of the bomb calorimeter is 2.84 kJ/g^oC.

8 0
3 years ago
If ice is added to a large fish tank and a small fish bowl, both at the same termperature, the large fish tank's water will cool
Nadya [2.5K]
False
because the smaller bowl of water has less volume to cool off with the ice than the large fish tank
4 0
2 years ago
Read 2 more answers
G in your own words, summarize the issue of ocean acidification: what is it and what's causing it?
AleksandrR [38]

Ocean acidification refers to a reduction in the pH of the ocean over an extended period of time, caused primarily by the uptake of carbon dioxide (CO2) from the atmosphere.

Because of human-driven increased levels of carbon dioxide in the atmosphere, there is more CO2 dissolving into the ocean. The ocean's average pH is now around 8.1, which is basic (or alkaline), but as the sea continues to absorb more CO2, the pH decreases and the ocean becomes more acidic.

How does ocean acidification affect us?

Ocean acidification can modify the abundance and chemical composition of harmful algal blooms in such a way that shellfish toxicity increases and, therefore, human health are negatively affected.

How we can reduce ocean acidification?

The most effective way to limit ocean acidification is to act on climate change, implementing solutions to dramatically reduce the use of fossil fuels. If we dramatically cut our global warming emissions, and we limit future warming, we can significantly reduce the harm to marine ecosystems.

To know more about ocean acidification:

brainly.com/question/7604502

#SPJ4

8 0
1 year ago
How many pairs of autosomal chromosomes does each person without chromosomal abnormalities have?
enot [183]
C. 23 pairs

There are a total of 46 chromosomes
6 0
2 years ago
Please help fast, I will give brainliest!
miss Akunina [59]
I think it’s 20 mol
Sorry if I’m wrong
4 0
3 years ago
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