Answer:
The source of the hydrogen is coming towards us.
Explanation:
The wavelength of the hydrogen is decreasing as it goes from 486.1 nm to 486.0 nm.
<u>The wavelength of a wave is directly proportional to the distance between the observer and the object.</u>
For example, when the observer is far from the source, the observer will observe a longer wavelength which corresponds to red color if it is in the visible region.
<u>As the wavelength is decreasing that means that the hydrogen particle ( source may be a star) is coming towards the observer.</u>
Thus, we can conclude that the source of the hydrogen is coming towards us.
Answer:
d = 14.9 g/mL
Explanation:
Given data:
Mass of metal = 22.4 g
Volume of eater = 3.2 mL
Volume of water + metal = 4.7 mL
Density of metal = ?
Solution:
Volume of metal:
Volume of metal = volume of water+ metal - volume of water
Volume of metal = 4.7 mL - 3.2 mL
Volume of metal = 1.5 mL
Density of metal:
d = m/v
d = 22.4 g/ 1.5 mL
d = 14.9 g/mL
Answer:
This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.
Explanation:
Heat flows from our body to iron
Answer:
C. AlCl3 is a covalent compound.
Explanation:
It is formed by mutual sharing of electrons between two atoms each contributing equal number of electrons to the electron pair.
