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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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Can yall help me with this one, thanks!
Lynna [10]

Answer:

Element   atom    molar mass     Total        % composition

Na               1            23                    40             57.5 %

O                 1            16                     40              40%

H                1               1                      40              2.5 %

The given compound is NaOH.

Na : number of atom= 1

Molar mass= 23 g/mol

Total mass of NaOH = 40 g/mol

% composition by mass = \frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{23}{40}\times 100=57.5\%

O : number of atom= 1

Molar mass= 16 g/mol

Total mass of NaOH = 40 g/mol

% composition by mass = \frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{16}{40}\times 100=40\%

H : number of atom= 1

Molar mass= 1 g/mol

Total mass of NaOH = 40 g/mol

% composition by mass = \frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{1}{40}\times 100=2.5\%

5 0
3 years ago
What does the atomic number of an element represent?
harkovskaia [24]
Hello!
Whenever you see an atomic number with an element, you know the number of protons in the nucleus of the atom, which determines the chemical of an element and its place on the periodic table.

For example, Hydrogen has only one proton, however, if you were to add say 78 more protons, you'd get gold!


5 0
3 years ago
Read 2 more answers
How many miles are in 0.062500 light seconds (s)?
MrRa [10]

Answer:

11625 miles

Explanation:

A second of light is the distance that light travels in a second. It has a value of 299792458 kilometers or if we do the unit conversion, 186,000 miles. A mile is 1.609 kilometers

Let's make a rule of three:

1 light s travels a distance of 186000 miles

0.062500 light s would travel a distance of (0.062500 . 186000) = 11625 miles

7 0
3 years ago
Which of the following WOULD NOT affect the level at which a cargo ship floats
kow [346]
Answer: D. The depth of the water does not affect the level at which a cargo ship floats.
3 0
3 years ago
During science class billy used litmus paper to determine the ph of an unknown liquid. the blue litmus paper turns red but there
denis-greek [22]
He was testing an acid. So your answer will be C.

Hope this helps!
3 0
4 years ago
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