To find the volume ratios we say m1v1=m2v2
where m1 is the initial molarity, m2 the final molarity, v1 the initial volume, v2 the final volume.in this question m1=2.00M, m2=0.40M v2=150ml
Therefore the expression becomes: 2.00M×v1=0.40M×150mL
v1=(0.40M×150mL)/2.00M
=30mL
b. Wearing goggles
c. Pushing glass tubing, thermometers, or glass thistle tubes through a rubber cork
d. Pointing the mouth of a test tube that is being heated away from you and others
e. Knowing where the fire extinguisher and eyewash stations are located
The answer is NOT 4... I took the test!
Answer:the temperature might increase because of the humidity in the room so everything gets goofy and moist
Explanation:
Answer is: 4) form an aqueous solution.
Physical property can be observed and measured without any changes in molecular composition. The same substance is present before and after the change. Making aqueous solution is physical change (solvatation).
Element reactions with acids, oxygen and chlorine are chemical change (chemical reaction combustion), because new substances are formed, the atoms are rearranged and the reaction is followed by an energy change (exothermic reaction because energy is released).