Question

Sucrose is another name for table sugar. Sucrose is a compound made from the elements carbon, hydrogen, and oxygen. Which statement best describes the properties of sucrose?

They are different from the properties of all the elements sucrose contains.
They are exactly like the properties of carbon.
They are exactly like the properties of hydrogen.
They are exactly like the properties of oxygen.

2: Which of the following is a way to gather empirical evidence?

Scientists read reports from other experiments that have some of the same variables as your experiments.
Scientists conduct research on the Internet and in textbooks.
Scientists make first-person observations during an experiment.
Scientists gather opinions from classmates, teachers, and scientists.


3:

A physical property can be observed or measured without changing the identity of a substance. Which of these choices describes a physical property?

The tendency of a substance to explode.
The temperature at which a liquid will boil.
The way the substance reacts with water.
The tendency of a metal to rust or not rust.

Answer 1

plz post 1 question at a time

Answer 2

Mass tagging is against the rules. Please don't do that again.

Answer 3

I didn't know it was. I'm sorry.

Answer 4

I saw other people do it so I thought you could. I'll delete the comment.

Answer 5

The properties of an element are unique. Hydrogen has a different set of properties than carbon which has a different set of properties than oxygen. Given that, do you think sucrose's properties will be identical to those of one of O, C, H, or completely different?

Answer 6

Would it be Hydrogen then?

Answer 7

Empirical is a nifty word, coming from Latin empīricus < Greek empeirikós, and meaning derived from experience. In other words, empirical evidence is that which you found by doing an experiment or observation of some sort.

Uh, no, it wouldn't be hydrogen. Why would it be hydrogen instead of carbon or oxygen, which are also component elements of sucrose? What's so special about hydrogen?

Answer 8

For the final question:

A physical property can be observed or measured without changing the identity of a substance. Which of these choices describes a physical property?

The tendency of a substance to explode.
The temperature at which a liquid will boil.
The way the substance reacts with water.
The tendency of a metal to rust or not rust.

if I have a stick of dynamite, and I light the fuse, causing it to explode, am I left with little bits of dynamite scattered about, or do I have something else?

if I boil some water, am I left with water (and steam), or something else

if I put a 100% iron bar in water and it rusts, do I still have a 100% iron bar or is some of it converted to iron oxides (rust)?

Answer 9

I just did the test (it's online) and I got them all correct because for you explaining this to me. Thank you very much. The medal goes to you!