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what would be the three equations that cancel correctly for hess law for the following reaction for magnesium oxide
at 25 degc the vapor pressure of acetone is 230 mmhg and the vapor pressure of toluene is 2845 mmhg what is the total
you add 1000g of water at 550c to 1000g of ice at 000c some of the ice melts and cools the water to 000c when thermal
when voyager 2 encountered the planet saturn in 1981 the planet was approximately 1 billion miles 1 x 109 mi from the
chemical cold packs contain two pouches one containing solid ammonium nitrate and the other containing water often dyed
gasohol is a mixture of gasoline and ethyl alcohol used as automobile fuel the alcohol produces energy in a combustion
normal saline solution used in ivs is usually around 090 mv or 0154 m however other saline solutions may have a higher
a 250 g sugar cube sucrose c12h22o11 is dissolved in a 350 ml teapot containing 80 c water density of water at 80 c
calcium chloride cacl2 is commonly used as an electrolyte in sports drinks and other beverages including bottled water
strontium chloride reacts with silver nitrate according to the equation srcl2 2agno3nbsprarr 2agcl srno32 what is the
sodium hydroxide naoh is a strong base that is sometimes used as a cleaning agent since it can be used to dissolve
calculate the kj of heat energy required to convert 1550 grams of ice at -440 c to all steam at 1000 c assume that no
jane wants to make an acid she has two possible compounds she could add to 2500 g of water to make this acid - either
part 1 using the following reaction aqueous lead ii nitrate reacts with aqueous lithium sulfatea predict the productsb
balance the molecular equations based on the reactions you mixed together and write the complete ionic equations and
calcium carbonate decomposes to form calcium oxide and carbon dioxide on strong heating what is the volume of carbon
pure iron can be extracted from iron ore fe203 from the reduction of carbon monoxide as shown by the following sequence
given that you know one gas in a mixture of gases has a pressure of 5 atm and has a mol fraction of 18 what volume will
compare the similarities and differences in the properties of the zn cu fe elements in their combination with water
how are zn fe cu alike and how are they different what trends do they follow on the periodic table how is their
the enthalpy change for the following reaction is -108 kjcog cl2g cocl2g estimate the co bond energy in cocl2g using
dinitrogen oxide can be produced by heating solid ammonium nitrate to 200 degrees c or more at 2000 degrees c n2o and
how many grams of oxygen are in 589times1023 formula units of nh42so4express your answer to three significant figures
if 327 cal of heat is removed from 178 g of copper the temperature decreased to 152 oc what was the initial temperature