Answer : Option B) All atoms of a single substance are identical.
Explanation : The scientist John Dalton proposed the atomic theory which had the postulates as follows.
i) All matter/substances consists of indivisible particles known as atoms.
ii) Atoms of the same element/substance are similar in mass,shape and size, but differ from the atoms of other elements.
iii) Atoms obey the law of conservation of energy which says atoms cannot be created or destroyed.
iv) Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form any compound atoms.
v) Atoms of same element can combine in ratio with more than one to form two or more compounds.
vi) The atom is considered to be the smallest unit of matter that can take part in a chemical reaction
The fumes of acetic acid go to the floor instead of ceiling.
The reason behind the answer is that the density of acetic acid fumes is higher than the density of air (almost twice) that is equal to only 1 .
Thus, the fumes of acetic acid go to the floor.
Answer:
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Explanation:
The air that is inside a ship is much less dense than water. That's what keeps it floating! The average density of the total volume of the ship and everything inside of it (including the air) must be less than the same volume of water.
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<u>molar</u><u> </u><u>mass</u><u> </u><u>of</u><u> </u><u>CCl4</u><u> </u><u>=</u><u> </u><u>1</u><u>5</u><u>4</u>
<u>density</u><u> </u><u>=</u><u> </u><u>1</u><u>.</u><u>5</u><u>9</u><u> </u><u>g</u><u>/</u><u>cm</u><u>³</u>
<u>volume</u><u> </u><u>=</u><u> </u><u>1</u><u>0</u><u> </u><u>liters</u>