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3 years ago

Which property of water makes it helpful to use in car radiators?

1 answer:

4 0

According to the main characteristics of water, the property of water which makes it helpful to use in car radiators is being shown in the last opton from the scale : C) Water takes long to heat and cool down than other liquids. Such property is the only one that logically suits the task.
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In a certain industrial process involving a heterogeneous catalyst, the volume of the catalyst (in the shape of a sphere) is 10.

olga nikolaevna [1]

Answer:

a. The second run will be faster.

d. The second run has twice the surface area.

Explanation:

The rate of a reaction is proportional to the surface area of a catalyst. Given the volume (V) of a sphere, we can find its surface area (A) using the following expression.

$A=\pi ^{1/3} (6V)^{2/3}$

The area of the 10.0 cm³-sphere is:

$A=\pi ^{1/3} (6.10.0)^{2/3}=22.4cm^{2}$

The area of each 1.25 cm³-sphere is:

$A=\pi ^{1/3} (6. 1.25)^{2/3}=5.61cm^{2}$

The total area of the 8 1.25cm³-spheres is 8 × 5.61 cm² = 44.9 cm²

The ratio of 8 1.25cm³-sphere to 10.0 cm³-sphere is 44.9 cm²/22.4 cm² = 2.00

Since the surface area is doubled, the second run will be faster.

6 0

3 years ago

If 500g of copper melts at 1085°C, at what temperature would 250g of copper melt?

Alex787 [66]

Answer:

the copper would melt at the same temperature no matter how much quantity there is so 1085

Explanation:

6 0

2 years ago

This type of pollution will decay naturally

butalik [34]

Withdrawal is the answer to your question.

3 0

3 years ago

Why does a red object appear red?

NeTakaya

Answer:

Objects appear different colours because they absorb some colours (wavelengths) and reflected or transmit other colours. ... For example, a red shirt looks red because the dye molecules in the fabric have absorbed the wavelengths of light from the violet/blue end of the spectrum

8 0

3 years ago

Read 2 more answers

16. The structure shown is representative of which substituted hydrocarbon?

Viktor [21]

Answer:

The answer is B. Ether

Explanation:

An atom of Oxygen between a carbon chain is called Ether

5 0

3 years ago