Question

Hey can someone help me with a couple questions

Answer 1

@Zale101 @thephysicsman

Answer 2

Someone please????

Answer 3

What's your question? Can't answer a question we can't see, just post it and someone will answer if they know.

Answer 4

ok thank you...ill post it now

Answer 5

ok so we did a lab in my class about physical and chemical changes and so we have to answer questions now and the first one says...

Answer 6

Although all of the chemical reactions (chemical changes) done in the
experiment obey the law of conservation of mass, it can’t be verified with the
equipment that was used to perform the reactions. Why is this statement
true? HINT: Do not answer this by stating that there were no scales.

Answer 7

Don't think we can answer that without knowing what the lab was. The answer most likely has to do with the fact that atoms are so tiny it's nearly impossible to measure them with any kind of equipment.

Answer 8

the lab was just mixing iron and sulfur and seeing what happens.... combining sodium chloride,sand and water.....and then putting sugar in a test tube and burning it

Answer 9

but the hint says do not answer this by stating that there were no scales.

Answer 10

@SapphireMoon

Answer 11

if u still dont know we can do question 2....How are chemical and physical properties related to chemical and physical changes?

Answer 12

@SapphireMoon

Answer 13

Hello can someone help me

Answer 14

Sorry, was at dinner. Chemical and physical changes are related to chemical and physical properties by the fact that the changes usually take advantage of the properties. The physical change of melting iron has to do with the physical property of the melting point of iron. The chemical change of reacting sodium and chlorine to make table salt has to do with the fact that sodium and chlorine each has what the other needs to be happy (enough atoms to fill their valence shell). I don't know the answer to the first question, sorry.

Answer 15

ok no thats fine thank you so much!

Answer 16

well can you answer the question of how can the law of conservation of mass not be verified in an experiment with the certain equitment (other than scales)?

Answer 17

@SapphireMoon

Answer 18

@SapphireMoon

Answer 19

That's the one I mentioned I can't answer, @pflori1234_pop! I think I answered the second question to the best of my ability... Lol maybe someone else can help.