chemistry task

Project Description:

name the three states of matter. describe the properties of each phase.

explain the difference between kinetic energy and kinetic energy.

define each of the following as a chemical or a physical change.

a match is lit ___________________

a solution of sugar is crystallized into rock candy ___________________

a bike frame rusts __________________

bleach and ammonia are mixed, toxic fumes are produced _________________

elements are defined by their

a. number of protons
b. number of electrons
c. number of neutrons
d. number of isotopes

if a neutral sodium ion loses one electron, what is the charge of the resulting ion?

a. - 1
b. + 1
c. - 2
d. + 2

what charges do the following elements have as ions?

na _______

h _______

cl _______

mg _______

give the formulas for the following ionic compounds

potassium iodide ____________________________

cobalt (ii) chloride ____________________________

chromium (iii) hydroxide ____________________________

give the formulas for the following molecular compounds

carbon tetrachloride __________________________

sulfur hexafluoride __________________________

diphosphorous pentasulfide ___________________________

give the names for the following compounds that contain polyatomic ions.

kno3 _______________________________

mgso4 _______________________________

nh4cl _______________________________

give the names for the following acids

hcl ______________________________

hno3 ______________________________

h2so4 _______________________________

which of the following are considered isotopes

a. ch4 and ch3ch3
b. p31 and p32
c. h2 and he2
d. p31 and s32

do the following conversions. show calculations. you may attach a separate sheet or include work on back if needed.

how many grams of glucose (c6h12o6) are in 3 moles of glucose?

how many atoms are in 36 g of h2o?

how many moles of h are in 5 moles nh3?

how many grams of h are in 20 grams nh3?

balance the following equations:

a. h2 + n2 nh3

b. c2h6 + o2 co2 + h2o

d. h2so4 + naoh h2o + na2so4

e. pcl3 + cl2 pcl5

reduce each of the following molecular formulas to the empirical formulas.

c2h6 ______________________

c40h22o2 ______________________

fe2cl4 ______________________

consider the following reaction and answer the following questions. show your calculations.

2 koh + mgcl2 2 kcl + mg(oh)2

how many moles of mgcl2 is needed to make 6 moles kcl?

how many grams of mg(oh)2 can be made from 10.0 g mgcl2?

how many grams of kcl can be made from 25.0 g koh?
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