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Using the values for the heat of fusion, specific heat of water, and or heat vaporization, calculate the amount of heat energy in each of the following: a) joules to condense 125 g of steam at 100 degrees celsius and to cool the liquid to 15.0 degrees celsius; b) joules needed to melt a 525-g ice sculpture at 0 degrees celsius and to warm the liquid to 15.0 degrees celsius; c) kilojoules released when 85.0 g of steam condenses at 100 degrees C, cool the liquid, and freeze it at 0 degrees C; d) joules to warm 55.0 mL of water (density=1.00 g/mL) from 10.0 degrees C and vaporize it at 100 degrees C.
Diamond is the hardest known substance. Fe metal is soft sunstance. Using your knowledge of bonding, explain why diamond is hard
how many atoms of hydrogen are contained in 35 molecules are butric acid?
The reaction between bromate ions and bromide ions is acidic solutions is given by the following equation BrO3-(aq) + 5Br-(aq) + 6H+(aq) -> 3Br2(l) + 3H2O(l)
When M2S3 is heated in air, it is converted to MO2. A 4.000g sample of M2S3 shows a decrease in mass of .277 g when it is heated in air.
Describe how you can use titration to determine the molar mass of an unknown acid, by giving a specific example and showing a sample calculation.
What are the equilibrium partial pressures of CO and CO2 if CO is the only gas present initially, at a partial pressure of 0.872 atm?
The entropy of a gas is larger than that of the liquid because the specific volume of gas is greater thus implying more mutual configurations are allowed for molecules in a gas than in the corresponding liquid.
Compare the orbital electronic configuration for K and Rb (s block), Hf and Zr (d block), F and Cl (p block). For each element, which ionic configuration should be the most stable?
What mass of Fe will form when 63.0g of CO reacts with 145g of Fe2O3 according to the following equation? 3CO+Fe2O3->2Fe+3CO2.
Draw the Lewis structure of chlorous acid (HClO2). The result is that around Cl there are Fill in the Blank 01 (a number) bonding groups and Fill in the Blank 02 lone pair(s) of electrons. The number and types of structural groups aroud Cl corresp..
When the sample is submerged in ice water at T = 0.00 C, its volume decreases to 2.57 L. what was its initial temperature (in K and C)?
What is the coordination environment of F in a hypothetical relative of CaF2, in which Ca forms a hcp array and F occupies all the tetrahedral sites?
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