Please hurry! *URGENT* *URGENT*
Best answer gets Brainliest!!

Please answer the question ASAP

Please help me!

which of the following is always altered when a substance undergoes a chemical change?

A) mass of the substance

B) arrangement of the atoms composing the substance

C) color of the substance

D) state of matter of the substance

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

0.09 moles of sodium sulfate in 12 ml of solution

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?