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Chemistry Midterm (M. version) Flashcards | StudBud
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Chemistry Midterm (M. version)
Chemistry Midterm (M. version)
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Questions
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Answers
1
how many sig figs does 349700. have?
4
6
9
2
2
if a isotope is more relatively abundant that means it is less likely to show up in nature
True
False
3
Calculate the atomic mass of this element. Ion 1: 10.0112 grams w/ 19.91% rel. ab, Ion 2: 11.009 grams w/ 80.09% rel. ab
12.56
11.0
10.81
11.29
4
What piece of equipment is this?
artistotle funnel
buret
separatory funnel
buchner flask
5
what is the electron configuration of Bromine?
[Ar] 4s^2 3d^10 4p^8
[Ar]4s 3d 4p
[Ar]4s^2 3d^10 4p^5
[Ar] 4s^2 3d^10 4p^4
6
What piece of equipment is this?
florence flask
filter flask
volumetric flask
erlenmeyer flask
7
what is this element?
radon
rubidium
ruthenium
rhodium
8
where are electrons located in a atom?
in a cloud outside the nuceus
inside the nucleus
floating around with protons
9
groups are vertical
True
False
10
what is NOT a type of element?
non-metals
carbon
carbon monoxide
metals
11
how much neutrons does this element have?
87
86
135
136
12
What two parts of Dalton's Atomic Theory is inaccurate? (2 right answers)
All atoms of the same element are identical
Atoms of different elements can make whole number ratios called compounds
Atoms are small indivisible particles
Atoms cannot be created or destroyed
13
a + bx -> ab + x is a example of
single replacement
decomposition
composition
double placement
14
what is the charge of phosphate?
-3
-1
+3
-2
15
which has a larger atomic radius?
nitrogen
boron
carbon
oxygen
16
How was the atom's structure founded? (IN ORDER)
Dalton, Thompson, Rutherford, Gold
Gold, Thompson, Rutherford, Dalton
Dalton, Gold, Thompson. Rutherford
Dalton, Rutherford, Thompson, Gold
17
What piece of equipment of this?
forceps
test tube holder
clamp
tongs
18
What is NOT a branch of Chemistry?
Analytical Chemistry
Molecular Chemistry
Organic Chemisty
Biochemistry
19
what are properties of metals?
good conductor of electricity and heat
brittle
dull
bad conductor of electricity
20
conservation of mass means matter can not be created/destroyed
True
False
21
exothermic reactions absorbs heat?
True
False
22
What is Chemisty?
the study of physical phenomena like the motion of matter, energy, force
the study of inanimate natural objects
the study of living organisms, divided into many specialized fields
the study of the composition, structure and properties of matter
23
which of these is not a anions?
ammonium
carbonate
nitrate
hydroxide
24
how does an electron get into an excited state after dropping levels?
it absorbs heat
the energy enters the electron
it releases heat
the energy leaves the electron
25
what is the electron configuration of bromine?
[Ar] 4s^2 3d^6
[Ar] 4s^1 3d^5
[Ar] 4s^2 3d^5
[Ar] 4s^2 3d^4
26
how to find moles from particles: Particles x Avogadro's number
False
True
27
1.23 + 175.135 + 0.0617 (answer)
176.43
176.4267
176. 427
176
28
this person is dressed appropriately for a lab (no points, just wanted to know tbh)
true
false
29
12.0 x 0.02458 (answer + sig figs)
0.2982 ; 4
0.30 ; 2
0.298 ; 3
.3 ; 1
30
which of these is NOT a physical property?
melting point
flamibility
solubility
mallaebility
31
What is the order of the scientific method?
formulate hypothesis->test hypothesis->observe/collect data->theorize/share
theorize/share->formulate hypothesis->test hypothesis->observe/collect data
test hypothesis->theorize/share->observe/collect data->formulate hypothesis
observe/collect data->formulate hypothesis->test hypothesis->theorize/share
32
which of these is not a acid?
phosphoric
hydrochloric
carbotic
nitric
33
what is the fist thing you should do if there is a injury/accident
tell your partner
scream and run
pull the fire alarm
report it to the instructor
34
where at the metals on the periodic table?
in the middle
left side
right side
35
what subatomic particle weighs the most?
proton
electron
neutron
