chemistry review: extra credit
what is the chemical formula for magnesium nitride?
Mg3N2
what type of substance changes red litmus paper blue?
a base
what is the name for the covalent bond Se2F10?
disilicon decaflouride
What type of reaction is AB + CD = AD + CB?
double displacement
what is an isotope?
element with different number of neutrons and different mass
what is a pure substance?
elements and compounds
when energy goes out of a reaction, it is known as what?
exothermic
give 3 examples of a chemical change.
fire, baking a cake, and mixing chemicals
what does 'g' stand for?
gas
What are four properties of ionic compounds?
high melting/boiling point, solid, dissolves easy, conductor
what is the process with water as the solvent called?
hydration
What are ionic compounds made up of?
metals and nonmetals
what is the charge of a neutron?
neutral
which state of matter is the most common in the universe?
plasma
What charge does an anion have?
positive
what is the charge of a proton?
positive
what is plasma?
positive and negative charged ions
what is a solution that contains as much solute that can possibly be dissolved called?
saturated
do covalent bonds take or share electrons?
share
what are covalent bonds made up of?
shared electrons
what is name for the chemical formula Al(OH)3?
aluminum hydroxide
what type of substance contains no oxygen?
an acid
what type of substance turned blue litmus paper red?
an acid
what is a hypothesis?
an educated guess: if/then
what is matter?
anything with mass and volume
what does 'aq' stand for?
aqueous
what is the octet rule?
atoms want 8 electrons
what does hydrophilic mean?
attracts water
what is name for the chemical formula CaO?
calcium oxide
what is the name for the covalent bond CO4?
carbon tetroxide
give an example of a homogeneous mixture.
coffee
what are six indicators that a chemical change has occurred?
color, precipitate, temp change, mass change, smell, bubbles
What type of reaction is hydrocarbon +O2 = CO2 + H2O?
combustion
what is formula for density?
d=m/v
What type of reaction is AB = A + B?`
decomposition
define a solid
definite shape and volume
define a liquid
definite volume, indefinite shape
when energy goes into a reaction, it is known as what?
endothermic
what makes an isotope stable or unstable?
equal number of protons and neutrons
give 2 examples of a pure substance.
gold and CO2
what are the prefixes for 6-10?
heck, heat, octave, nona, deca
what is the name for the covalent bond P6O7?
hexaphosphorous heptoxide
what are the two types of mixtures?
homogeneous and heterogeneous
give 3 examples of a physical change.
ice melting, cutting a log, and tearing paper
define a gas
indefinite shape and volume
what does 'l' stand for?
liquid
what is name for the chemical formula Li2SO4?
lithium sulfate
what is name for the chemical formula Mg3(PO4)2?
magnesium phosphate
how do you find the number of neutrons?
mass - atomic number = neutrons
what are the prefixes for 1-5?
mono, di, tri, tetra, penta
what charge does a cation have?
negative
what is the charge of an electron?
negative
what is the name for the covalent bond NO3?
nitrogen pentoxide
what is fission?
nucleus splits into two nuclei
what does the atomic number tell you?
number of protons and electrons
what does the mass number tell you?
protons + neutrons
what are the three subatomic substances?
protons, neutrons, and electrons
what does hydrophobic mean?
rebels water
What type of reaction is AB + C = A + CB?
single displacement
what is name for the chemical formula NaCl?
sodium chloride
what are two properties of covalent compounds?
soft, brittle
what does 's' stand for?
solid
what are the four states of matter?
solid, gas, liquid, and plasma
What two things make a solution?
solvent and solute
what are three elements of the fire triangle for combustion to occur?
spark, fuel, oxygen
what is a solution that contains a greater than the maximum amount of solute called?
supersaturated
What type of reaction is A + B = AB?
synthesis
do ionic compounds take or share electrons?
take
what is the conservation of mass?
the mass of reactants is equal to the mass of products
how many sig figs is in 134?
three
what is half life?
time for half of a sample to decay
give an example of a heterogeneous mixture.
trail mix
what is the name for the covalent bond Si3Br9?
tricilicon nonobromide
what is fusion?
two nuclei combine into one nucleus
what is a mixture?
two or more substances mixed together
what is a solution with less than the maximum amount of solute called?
unsaturated
what does cohesion mean?
water is attracted to water
what does adhesion mean?
water sticks to other objects
what is the formula for the compound sulfur dioxide?
SO2
what is the formula for the compound tetra silicon nonabromide?
Si4Br9
what is the mass of 3.01 x 10^21 atoms of Cobalt (Co)?
0.295g
how many molecules is in 6.00 grams of Fe(NO3)3?
1.49 x 10^22 mc
How many atoms is in 10.0 g of sulfur?
1.88 x 10^23 atoms
how long is three half lives?
17,190 years
what is the molar mass of Cu(NO3)2?
188g/mol
what is the number of molecules in 0.345 moles of NaNO2?
2.08 x 10^23
how many grams are present in 80.0 mol of zirconium?
7280g
what is the mass of 3.92 x 10^23 molecules of FePO4?
98.3g
What is a coefficient?
A number placed in front of a chemical formula in an equation
what is the chemical formula for potassium phosphide?
K3P
what is the chemical formula for lithium oxide?
Li2O
what is the chemical formula for beryllium nitrate?
Be3(NO3)2
what is the formula for the compound carbon hexafluoride?
CF6
what is the chemical formula for calcium hydroxide?
Ca(OH)2
what are the products of a combustion reaction?
H2O & CO2
what is the formula for the compound dinitrogen heptoxide?
N2O7
what is the formula for the compound tetra nitrogen oxide?
N4O
what is the formula for the compound hydroxide?
OH
what is the formula for the compound diphosphorous hexoxide?
P2O6
what is the formula for the compound triphosphorous pentachloride?
P3Cl5