Question

List three clues that suggest a chemical change is taking place, and provide an example for each.

Answer 1

please please please help i dont get this

Answer 2

think of characteristics of chemical reactions... e.g. what happens if you burn something, what do you see?

Answer 3

smoke?

Answer 4

can you explain what a chemical can be?

Answer 5

okay do you see light? that signals a release of energy..

Answer 6

do you feel the release of heat? thats chemical bonds breaking

Answer 7

ok?

Answer 8

The process of a solid changing directly into a gas is called what

Answer 9

sublimation

Answer 10

In nature Hydrogen does not "hang around" just as a Hydrogen atom, it combines with another Hydragon atom to form H2. H2 is an example of a what

A. Compound
B. Molecule
C. Isotope
D. Mixture

Answer 11

is it a compound

Answer 12

oh sorry i ment to close the last Q but do you know?

Answer 13

I have three more Q's if you can answer them

Answer 14

it would be considered a molecule

Answer 15

what

Answer 16

suree, shoot

Answer 17

ok first one go up

Answer 18

hydrogen gas H2 is a molecule

Answer 19

although it can also be considered a compound

Answer 20

ok so can you think of what one it would be?

Answer 21

i would say molecule

Answer 22

technically it's a molecular compound haha so what question is bogus

Answer 23

that*

Answer 24

ok so what do i tell my teacher?

Answer 25

haha tell him/her that question is bogus lol but seriously, they're synonyms in chemistry

Answer 26

ok if he yells at me i can blame you hahaha

Answer 27

jk so here is my next Q

Answer 28

hahaha sure. lol ok shoot

Answer 29

Which of the following is an example of a homogenous mixture?

A. Lucky Charms in Milk
B. Chicken noodle soup
C. Air
D. All of the above

Answer 30

now this one i really dont know i missed this class

Answer 31

a homogeneous mixture is where there is one phase.. so you can't tell the difference between one substance and another...

Answer 32

ok so A or no?

Answer 33

can you tell the difference between the milk and the cereal?

Answer 34

yes

Answer 35

so thats not homogeneous because in homogeneous subtances you can't tell the diff

Answer 36

ok so A?

Answer 37

LOL nooo

Answer 38

if you can see the 2 substances separately then it's a HETEROgenous mixture

Answer 39

ok i am sorry but you lost me

Answer 40

okay, a homogeneous substance is one where there is ONE phase, meaning you can't tell the difference between the parts that make it up.

e.g. if you dissolve salt in water, you can't tell it's there, so it's homogeneous

Answer 41

now if you have cereal and milk, will you be able to tell that theres milk in the cereal?

Answer 42

oh ok so what would it be then?

Answer 43

it's called "heterogeneous" if you can tell that theres more than one subtance

in latin:
homo = same
hetero = different

Answer 44

oh that helps alot

Answer 45

yeah, mostly all of the sciences have greek or latin terminology

Answer 46

ok cool so now what would the answer be? then only two more Q's then i am doneif you rup for it

Answer 47

so in which one of these mixtures can you not tell them apart?

A. Lucky Charms in Milk
B. Chicken noodle soup
C. Air
D. All of the above

Answer 48

c and b i think

Answer 49

in chicken noodle soup, won't you see the noodles?

Answer 50

oh yes but you cant see air so is this a joke also?

Answer 51

oh never mind its c i did not read the Q so i get it now thanks

Answer 52

haha nope, air is a homogeneous mixture because (yeah while it might be colourless) there is a mixture of gases which you can't tell apart. and actually O2 is blue, why do you think the sky is blue?

Answer 53

LOL you didn' read the question?

Answer 54

i just forgot it lol

Answer 55

how old are you?

Answer 56

ask that again and i call the cops but i am in 12th grade

Answer 57

what, relax dude

Answer 58

later