When one metal mixes into the crystalline lattice of another it is called a(n)

A. Alloy
B. Compound
C. Chemical reaction
DHeterogeneous soulution

it would be an alloy

Explanation:

 It is a type of substance that is made by the melting of two or more elements together.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.