<span>These values also increase from the
bottom to the top of a group because the size of the atom decreases, resulting
in a smaller distance between the nucleus and the valence electron shell, which
increases the attraction between the protons and electrons.</span>
Answer:- 3. and
Explanations:- An empirical formula is the simplest whole number ratio of atoms of each element present in the molecule/compound.
For example, the molecular formula of benzene is . The ratio of C to H in it is 6:6 that could be simplified to 1:1. So, an empirical formula of benzene is CH.
In the first pair, the ratio of C to H in first molecule is 2:4 that could be simplified to 1:2 and the empirical formula is . In second molecule the ratio of C to H is 6:6 and it could be simplified to 1:1. and the empirical formula is CH. Empirical formulas are different for both the molecules of first pair and so it is not the right choice.
In second pair, C to H ratio in first molecule is 1:2, so the empirical formula is . The C to H ratio for second molecule is 1:4, so the empirical formula is . Here also, the empirical formulas are not same and hence it is also not the right choice.
In third pair, C to H ratio in first molecule is 1:3, so the empirical formula is . In second molecule the C to H ratio is 2:6 and it is simplified to 1:3. So, the empirical formula for this one is also . Hence. this is the correct choice.
In fourth pair, first molecule empirical formula is CH. Second molecule has 2:4 that is 1:2 mole ratio of C to H and so its empirical formula is . As the empirical formulas are different, it is not the right choice.
So, the only and only correct pair is the third one. 3. and
The sample of smoke described above can be described as a heterogeneous mixture. This type of mixture do not have uniform properties and composition. So, getting a certain small sample would not represent the whole mixture since it does not have uniform composition.
The reaction that has been, following the law of conservation of mass has been .
The law of conservation has been given in the chemical reaction that there has been no loss or gain of the mass and energy.
The law of conservation has been evident when there has been an equal number of atoms of each element on the product and the reactant side.
<h3 /><h3>Conservation of mass in Cellular respiration</h3>
The following reactions have been identified as:
Carbon atoms
Reactant = 3
Product = 18
Oxygen atoms
Reactant = 9
Product = 18
Hydrogen atoms
Reactant = 6
Product = 36
The number of atoms is not equal on the product and reactant side, thus not follows the law of conservation of mass.
Carbon atoms
Reactant = 6
Product = 6
Oxygen atoms
Reactant = 24
Product = 18
Hydrogen atoms
Reactant = 12
Product = 12
The number of atoms is not equal on the product and reactant side, thus not follows the law of conservation of mass.
Carbon atoms
Reactant = 6
Product = 6
Oxygen atoms
Reactant = 18
Product = 18
Hydrogen atoms
Reactant = 12
Product = 12
The number of atoms is equal on the product and reactant side, thus follows the law of conservation of mass.
Carbon atoms
Reactant = 6
Product = 0
Oxygen atoms
Reactant = 12
Product = 12
Hydrogen atoms
Reactant = 24
Product = 0
The number of atoms is not equal on the product and reactant side, thus not follows the law of conservation of mass.
Thus, the reaction that has been following the law of conservation of mass has been .
Learn more about law of conservation, here:
brainly.com/question/2175724
Answer:
Explanation:
All of above except carbon dioxide