Answer:
1) Element
2) Compound
3) Element
4) Mixture
5) Compound
6) Element
7) Compound
8) Mixture
9) Mixture
10) Mixture
11) Compound
12) Mixture
Explanation:
A compound refers to a combination of two or more atoms of the same or different elements Eg NH3.
A mixture refers to any combination of substances which do not chemically reavt together and are separable by physical methods.
An element refers to a substance that contains only one type of atom.
Answer:
A student mixes baking soda and vinegar in a glass. ... Yes I do belive that new substances are being formed because there is a chemical reaction between the baking soda and vinegar turning it into a bubbly substances instead of a powder and liquid.
Explanation:
#2 Earth. So far were the only planet to support live
Quantitative numerical data
Answer:
half-life=T= 36.9 years
Explanation:
As we know that
N
(
t
)
=
N
(
0
)
⋅
0.5
^(t/
T
)
N
(
0
)
=the number of atoms you start with=20 gram
and N
(
t
)= the number of atoms left=0.625 grams
after a certain time=t=184.5 years
T=half life of a nuclide=?
Putting value in above equation we get
half-life=T= 36.9 years
.