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Alenkasestr [34]
3 years ago
9

What is the effect of tap water, sea water, and rainwater on the rusting rate of iron?

Chemistry
1 answer:
UkoKoshka [18]3 years ago
4 0

Answer:

The more acidic the solution the faster it rusts. More Na = more rust

Explanation:

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Calculate the amount of heat gained when one 250 gram bottle is heated from 25oC to 30oC. The specific heat of water is 4.18 J/g
Fed [463]

Answer:

5230J

Explanation:

Mass (m) = 250g

Initial temperature (T1) = 25°C

Final temperature (T2) = 30°C

Specific heat capacity (c) = 4.184J/g°C

Heat energy (Q) = ?

Heat energy (Q) = Mc∇T

Q = heat energy

M = mass of the substance

C = specific heat capacity

∇T = change in temperature = T2 - T1

Q = 250 × 4.184 × (30 - 25)

Q = 1046 ×5

Q = 5230J

The heat energy required to raise the temperature of 250g of water from 25°C to 30°C is 5230J

7 0
3 years ago
Read 2 more answers
Why is water a polar molecule but a fluorine molecule is not?
yKpoI14uk [10]

Answer:

The electrons in H2O are not shared equally, making it a polar molecule. The molecules in flourine, F2, are shared equally, making it not a polar molecule.

Explanation:

8 0
3 years ago
If it takes 100 N to move a box 5 meters, what is the work done on the box?
JulijaS [17]
<h3>Answer:</h3>

500 Joules

<h3>Explanation:</h3>

<u>We are given;</u>

  • Force is 100 N
  • Distance is 5 m

We are required to calculate the work done;

  1. Work done is the product of force and distance.
  2. That is, work done = Force × distance
  3. Work is measured in Joules

Thus, in this case;

Work done = 100 N × 5 m

                  = 500 Joules

Thus, the work done in moving the box is 500 joules

8 0
3 years ago
Water flows through the body of the sponge in the direction the arrow points in this illustration. How does water move through a
adoni [48]

The correct answer is (C) in through the pores and out through the osculum

7 0
3 years ago
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How does the ratio of h to o atoms in starch compared with the ratio in water?
ohaa [14]
<span>the same The formula for starch is C6H10O5 which has a ratio of 10 to 5 which reduces to 2 to 1 for the hydrogen to oxygen ratio. The formula for water is H2O which also has the ratio of 2 to 1 for hydrogen. Since the ratios are the same, the answer to the question is "the same". The name used for the category of nutrient that starch falls under should give a strong clue to the chemical formula. It's carbohydrate.</span>
8 0
3 years ago
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