Question

Which physical properties can be used to identify an unknown substance?

Choose all answers that are correct.

A.
length

B.
volume

C.
density

D.
boiling point

Answer 1

Normally density, boiling and melting point, but since you probably can only choose one, the best choice should probably be C.

Answer 2

no u can choose more than 1!

Answer 3

Then C and D

Answer 4

Sorry I read that wrong Dx

Answer 5

soooo yeah prolly jus' c and d..... i would've went w/ that anyway!

Answer 6

Yep :3

Answer 7

i got 75% correct

Answer 8

on the test

Answer 9

What question was wrong?

Answer 10

thats good though right?????

Answer 11

it's a regular C, which is a passing grade.

Answer 12

nah really i knew that....... just wonderin if she good w/ it and if i got any wrong

Answer 13

1, 11, 13, and 15

Answer 14

Which part of the atom forms chemical bonds?

A.
the inner electrons

B.
the outermost electrons

C.
the nucleus

D.
the outermost protons

Answer 15

it was b

Answer 16

im soooo sorry ughhhhhhhhhhh!!!!!!!!!

Answer 17

its ok

Answer 18

Okies D:

Answer 19

Which is a chemical property of iron?

A.
density

B.
conductivity

C.
reactivity

D.
boiling point

this was my bad

Answer 20

it was c

Answer 21

How does a nonmoving brick from a building resemble the atoms in a solid?

A.
The brick has a fixed shape as do the atoms in any solid.

B.
The brick and the atoms of a solid share the same structure.

C.
The brick's components are the same as those of the atoms in a solid.

D.
The brick is nonmoving, just as the atoms in a solid are nonmoving.

Answer 22

You chose C or C is the answer?

Answer 23

a

Answer 24

the answer

Answer 25

That doesn't make much sense but ok >_>

Answer 26

Which best describes why a physical change differs from a chemical change?

A.
A physical change predicts the behavior of a substance when in a reaction, whereas a chemical change is used to identify characteristics of a substance.

B.
A physical change results in a new substance being formed, and a chemical change results in a different state of matter.

C.
A physical change happens spontaneously, and a chemical change is used by scientists to create new substances.

D.
A physical change will result in a different state of matter, whereas a chemical change results in a new substance being formed.

this was d i chose b

Answer 27

The answer is D.