Answer: The porpoise would hear its echo first because sound travels faster in the water than in air.
Explanation:
Answer: 1,4,1 for the reactants
3,1,4,1 for the products
Explanation:
The products are equal to the reactants because of the conservation of matter.
Galactic recycling is a natural phenomenon in which the stars expel some gas into the space so that it would mix with the interstellar medium. As a result, this would produce new younger stars. So, basically, the concept done here is the mass and energy conservation. In order to create new species, the energy must come from another source.
Answer:
k+
Ba2+
Al3+
K+
S2-
you may think that if it has a + it would be bigger, but it is actually the opposite.
The drawing is correct because there are 12 atoms of each type on each side of the arrow.
