A chemist measures the mass of an unknown substance. The mass is 2.53 g. Which statement best describes the chemist measurement a : it’s is a qualitative inference
b : it is a quantitative inference
c : it is a qualitative observation
d : it is quantitative observation

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.

the ratio of the conjugate base to the acid required to attain the desired ph.

give me abc and i will get it for u.

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.