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AURORKA [14]
4 years ago
8

Tick the correct choice and give reason why you have selected the particular choice. [20] 1. A cup of hot tea is left in the sam

e room as a bowl of ice-cream. What is likely to happen to both after some time, if both are placed on the dining table? A. The tea becomes as cold as ice cream B. The ice cream becomes warmer than the tea C. The tea cools to room temperature, the ice cream melts and warms to room temperature D. The tea becomes colder than before but not as cool as the air in the room
Chemistry
1 answer:
Stells [14]4 years ago
4 0

Answer:

C. The tea cools to room temperature, the ice cream melts and warms to room temperature.

Explanation:

The tea's temperature was higher than room temperature. The ice cream's temperature was lower than room temperature. After some time, both items will become room temperature, which results in cooling and melting.

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Determine the oxidation number of the element "J" in H3JO2-
igor_vitrenko [27]

Answer:

Oxidation number:

3*1+ oxidation number of J+2*-2= -1

Oxidation number of J = 0

5 0
3 years ago
An iron ore contains 39% Fe2O3 by mass. What is the maximum mass of iron that can be recovered from 13.2 kg of this ore?
Mars2501 [29]

Answer:

3.6036

Explanation:

0.39 * 13.2 = 5.148

5.148 * 0.7 = 3.6036

Fe2O3 = 0.7

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nalin [4]
Because they don't care and think the ozone layer is fine.
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3 years ago
Suppose you needed a 0.0250 M sodium thiosulfate solution to conduct 6 titrations. Explain how you would make up this solution u
AysviL [449]

Explanation:

According to the law of dilution,

       M_{1}V_{1} = M_{2}V_{2}

The given data is as follows.

   M_{1} = 0.4782,     V_{1} = ?

    M_{2} = 0.025 ,    V_{2} = 250 mL

Hence, we will calculate the value of V_{1} as follows.

              V_{1} = \frac{M_{2} \times V_{2}}{M_{1}}

                          = \frac{0.025 \times 250}{0.4782}

                          = 13.07

Thus, we can conclude that we need 13.07 mL 0.4782 M sodium thiosulfate solution using pipette.

4 0
3 years ago
True or false. it is safe to heat flammable liquids with a bunsen burner as long as it’s done in a fume hood.
Alborosie
I believe the answer is false. It is not safe <span>to heat flammable liquids with a bunsen burner even when it’s done in a fume hood. It is never recommendable to heat liquids that are flammable since it has a very high risk. Hope this answers the question.</span>
4 0
4 years ago
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