I believe the correct answer would be that b<span>oiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid. Boiling and melting are phase changes that can happen to a substance however they differ in the process that happens.</span>
Answer:
<em>number of moles of gas increases the volume also increases.</em>
Answer 6
Explanation: That means a carbon atom has 6 protons, 6 neutrons, and 6 electrons.
The given equation is:
<span>N2H4(l) + O2(g) → N2(g) + 2H2O(g)
From the periodic table:
mass of nitrogen = 14 grams
mass of hydrogen = 1 gram
mass of oxygen = 16 grams
Therefore:
molar mass of N2H4 = 2(14) + 4(1) = 32 grams
mass of water = 2(1) + 16 = 18 grams
From the balanced equation:
1 moles of N2H4 produces 2 moles of H2O.
32 grams of N2H4 produce 18*2=36 grams of water
To know the mass of N2H4 needed to produce 96 grams of water, all you need to do is cross multiplication as follows:
mass of N2H4 = (96*32) / 36 = 85.3334 grams</span>
<span>Every
chemical is made up of atoms and each atom has one or more electrons
surrounded its nucleus. The electron emits light after changing from
a high energy state o to a lower energy state which is known as
transition. The color of this light is unique to each element because
each atom of a particular element has a different transition energy.</span>
