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What’s a Molecule?
group of atoms with no charge
What’s a Compound?
make up of 2 or more different atoms held 2gether by bonds
What are Ions?
Atoms with a charge
What is the Chemical Law Mass Conservation?
mass is conserved in a chem reaction
What is Definite proportions law?
Compound always contain same proportion of their components
What is the Constant composition law?
same element commotion no matter the source it’s come from.
What are intensive properties & some examples?
independent of the amount of a substance
Color, odor, malleability & density
What are extensive properties & some examples?
Dependent on the amount of substance
mass
volume
length
size
What are examples of Physical Properties?
Density
Color
Metal
Squid & room temp
Dissolving
Precipitation
What are some examples of Chemical Properties?
Reactions that occur with O2 or H2O
Rust
Corroding
Burning
Decomposing
What makes something a mixture?
can be separated by physical means
Homogenous VS. Heterogenous Mixture?
mixed in a uniformed fashion VS. mixed in a un-uniformed fashion
From left to right what would the states of matter be?
Solid —> Liquid —> Gas
Precision VS Accuracy
Closeness of taken/measured values
VS.
Closeness to a true definite value
What makes the Bolded #s sig figs & what’s the last s.f.?
129
All Non-zero digits
9
What makes the Bolded #s sig figs & what’s the last s.f.?
5007
Zeros between non-zero digits
7
What makes the Bolded #s sig figs & what’s the last s.f.?
1000.0
Trailing zeros that contain a decimal point
0 (after the point)
What makes the Bolded #s sig figs & what’s the last s.f.?
0.000470
zeros infant of non-zero digits don’t count & there is a zero after a decimal point that would count
0
What makes the Bolded #s sig figs & what’s the last s.f.?
0.0025
zeros before the non-zero digits not counting. Starting of non-zero digits.
5
What makes the Bolded #s sig figs & what’s the last s.f.?
100
trailing zeros in a number that isn’t a decimal
1
What makes the Bolded #s sig figs & what’s the last s.f.?
9.8 × 10^6
10 & exponent in scientific notation do not count as sig.figs
.8
What is the # of Sig figs in each #?
250.7
0.00077
4.7 × 10^-5
500.0
0.034000
220
220.
4
2
2
4
5
2
3
What is mega a multiple for & it’s symbol?
10 ^ 6
M
What is kilo a multiple for & it’s symbol?
10³
k
What is deci a multiple for & it’s symbol?
10^-1
d
What is centi a multiple for & it’s symbol?
10^-2
c
What is milli a multiple for & it’s symbol?
10^- 3
c
What is micro a multiple for & it’s symbol?
10^-6
μ
What is nano a multiple for & it’s symbol?
10^-9
n
What is pico a multiple for & it’s symbol?
10^-12
p
What is bigger a nanogram or gram?
gram
how many ng are in 8.9?
8.9 × 10^-9 ng
how many km is 1.6 m?
1.6×10³km
as proton number increases what will be required to get a stable nucleus?
more neutrons
one mole of atoms is equivalent to?
the molar mass
What is Molarity? or M
mol of solute/ liter of solution