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Chemistry Cahoot
Pv=nRT is
molarity is molded of solute over liters of solution
Chemistry Cahoot
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#grade_11 #chemistry
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Answers
1
molarity is molded of solute over liters of solution
false
true
2
Pv=nRT is
gas stoichometery formula
an ideal gas law
3
The lewis structure shows the bonding of
atoms and molecules
elements
hydrogen and water
4
In mass to mass stoich, the first step is to take grams to moles
true
false
5
what is the chemical symbol for hydrogen?
H2
h2o
6
the standard unit of pressure is ATM.
false
true
7
what is a mixture?
elements with other compounds
a substance made by mixting together other substances
8
what is a photon?
particle of light energy
positive charge
9
if adams receive any type of energy from a source they become bored.
false
true
10
ionic compounds occur when a metal reacts with a non metal
true
false
11
how many sig figs are in 1.09
5
1
3
2
12
what would the pH of .0010 M HCL be?
1
3
13
if you have 20g of N2 and 5g of H2 what is the limiting reactant?
N2
H2
14
acid base reactions involve transferring electrons
false
true
15
what is the difference between the bohr model and the wave mechanical?
WM works for all elements, bohr only works for hydrogen
wave doesn’t work for any atoms and bohr does
16
what are gamma rays?
penetrating electromagnetic radiation
light bulb rays
17
the third orbital is labeled as “s”
true
false
18
To calculate mass percent divide the mass of the element by the total mass, then multiply by100
false
true
19
calculate the percent composition of CaCo3
98
100
69
21
20
acid base reactions typically produce
carbon
water
salt
21
what is on the left side of the arrow in a chemical equation?
products
elements and compounds
22
the first step in the scientific method is to analyze the data
false
true
23
formula for dilution is M1V1=M2V2
true
false
24
one way the state of matter for energy could change is through heat
false
true
25
what is the formula for hypochlorite?
HCl -1
CLO -1
HCL -2
26
initial sample has 1.52 m of At at 2.5 atm and 23.2°c is now at 5.5 atm and 29.8°c.
1.58 moles were lost
1.58 miles were added
27
H2SO4 is what acid?
hydrosulfic acid
sulfuric acid
nitric acid
28
What is the difference between molecular and empirical formulas
the moles
m= atoms of each element in substance E=simplified
29
Chemistry is the study of matter and the changes that occur to matter
true
false
30
dipole movements occur when there is
a bond breaks
water involved
a separation of charge
31
does ionization energy increase or decrease when traveling across the periodic table?
decrease
increase
32
when using Boyles law formula is important to remember to change your temperature to
kelvin
Fahrenheit
Celsius
33
bet ionic equations differ from molecular ones because
they do not contain spectator ions
they contain spectator ions
34
why is it important to have a system for naming compounds?
gives the amount of atoms in a compound
to be balanced
35
the kinetic molecular theory states all except
elements are molecular in certain states
there are no forces of attraction between gas particles
collisions between gas particles are elastic collisions
36
inches, meters, and gallons are the standard measurements in the metric system
false
true
37
the law of conservation of matter is that matter annoy be created or destroyed
true
false
38
a precipitation reaction forms an insoluble salt
true
false
39
What symbol is potassium?
K
Pa
40
a catalyst speeds up a reaction
true
false
41
what is produced in a combustion reaction?
water
CO2
all of the above
42
name a property of an ionic compound
high melting and boiling points
they bubble
43
calculate the molar mass of NaCl
58.78
67.9
58.44
44
“like dissolves like” Refers to polar and nonpolar solvent and solute
true
false
45
what is 16cm in meters?
.16
.116
46
what is 1.56 x 10^-16 in ordinary decimal form?
.000156
.00000156
.0000000000000000156
47
how is percent yield calculated?
mass/mole
experimental yield/theoretical yeild times 100
48
pV=nRT is
ideal gas law
gas stoichometry formula
49
You count atoms by weighing by totaling the weight of one item
false
true
50
The equation N2+3H2———>3NH2 is balanced
true
false
51
what is the formula for titanium hydride?
TiH2
T2H
52
what information is given by a balanced equation
mass of product
a balanced chemical equation in a specific compound
53
one part of dalton’s atomic theory is that
matter cannot be created or destroyed
all matter is made up of atoms
54
when a reaction is oxidized, does it gain or lose al electron?
gains
loses
55
the three states of matter are solid, liquid, and gas
true
false
56
convert 456 degrees celsius to kelvins
279 kelvins
729 kelvins
57
the bohr model only works for which element?
iron
hydrogen
potassium
58
electronegativity is the unequal sharing of electrons between two atoms
false
true
59
a sign that a reaction has occurred could be that bubbles have formed
false
true
60
water can be a baserunner acid and this is proven by
molarity
density
amphoteric nature of water
61
the three phases of water are ice, liquid, and water vapor
true
false
62
what does it mean if there is “multiple bonds”
two or more bonds are occurring
there is only one bond
63
what is the relative mass of water
16
32
18
64
a covenant bond is an extreme type of bond
false
true
65
what is true about an element ?
it is the most complex form of anything in chemistry
it cannot be broken down into anything simpler
66
an example of a driving force of a reaction is
water
speed
67
what is the empirical formula for C6H12?
CH
H2o
68
and acid is a chemical substance that disturbs alkalis dissolves some metals
true
false
69
the middle of the periodic table consists of
transition metals
non metals
70
the abbreviated electron configuration for xenon is Kr 4d10 5s2 5p6
true
false
71
you can calculate the levels of hydrogen by using the formula 1eV= 1.602x10^-19
true
false
72
which data gives specific numbers and measurements?
qualitative
quantitive
73
An ion is a substance made of two or more compounds
true
false
74
the electron configuration if flourine is 1s2 2s2 2p4
false
true
75
what is the electron a configuration for xenon?
5d6 10s3
Kr 4d10 5s2 5p6
76
what is the formula for sulfate?
SO3
SO2 -4
SO3 -4
77
which of the following is one of the five most abundant elements on earth?
water
silicone
78
the formula for density is
cm^3
mass/volume
79
what is the current model of the atom?
bohr
wave mechanical
80
what is the name of the current model of the atom?
bohr model
schrodinger and heisenberg model
81
dalton’s law of partial pressure states that
total pressure entered is equal to partial pressure
all pressure can be created and destroyed
82
which is a characteristic of an isotope?
they’re wet
each of the forms of same elements contain protons
83
charles law shows the relation between
pressure and volume
gassed
pressure and temperature
84
you separate a mixture by hand most of the time
false
true
85
how is one way you can write an electronic configuration?
cursive
box diagram
86
convert 10 mL into liters
.01
.1
87
the first step in gas stoichometery is to use the ideal gas law
false
true
88
what is the name of B6Si?
septaboron disilicide
hexaboron monosilicide
89
what is avogadro’s number?
6.022 x 10^-23
.08261
90
the pH scale provides a scaled down way to represent solution acidity
false
true
91
To count atoms by weighing, you must know its initial weight
true
false
92
which one is a physical property?
paper turning to ashes
color
93
A solution that has exceeded its amount of saturation is called
super saturated
unsaturated
dissolved
