When atoms and molecules speed up or slow down, that is a physical change. When they change state from liquid to solid or from gas to liquid, that is a physical change. ... The ions or molecules can still come back together to form the original substance
Answer:
5 1 2 4and 3 this is correct way
Obsidian - extrusive igneous
granite - clastic sedimentary
conglomerate - intrusive igneous
evaporite - chemical sedimentary
coal - organic sedimentary
marble - metamorphic
Answer:
1. Source of carbon
2. Removal of cuticle
Explanation:
You may have been doing a photosynthesis lab in a biology course.
1. NaHCO₃
The purpose of creating a sodium bicarbonate solution was to provide the carbon that the plant needs for photosynthesis.
2. Soap solution
The soap solution acted as a detergent. It removed some of the waxy, water-repelling cuticle from the leaf's surface and made it easier for the sodium carbonate solution to get inside.
Answer:
a) 4NH₃ + 6NO ⇄ 6H₂O + 5N₂
b) 2H₂S + 3O₂ ⇄ 2H₂O + 2SO₂
Explanation:
Write the equation as given then modify accordingly.
a) NH3 + NO ⇄ H2O + N2
make sure that the amount of each element is equal in both side (reactants and products)
Hydrogen is the different one thus to make H egal we multiply by 2 in the reactant and by 3 in the product to make it 6. Thus the all reaction is multiply accordingly.
2NH3 + 3NO ⇄ 3H2O + 5/2N2
to remove the fraction, multiply both side by 2.
4NH3 + 6NO ⇄ 6H2O + 5N2
b) O2 + H2S ⇄ H2O + SO2
The Oxygen are not the same, so we make them equal to 6 in both side. in the reactant we have to multiply by 3. In the product we have to get 2 for water and 2 for SO2 to have a total of 6 O.
we modify the reaction accordingly to equal elements in both side.
2H2S + 3O2 ⇄ 2H2O + 2SO2
