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When compound Y is heated, it decomposes to the element X and hydrogen gas. Decomposition of 1g of Y yields 0.0250 mol of gas. Calculate the possible molar mass values for X.
a. 10, 20 and 30g/molb. 30,40 and 50g/molc. 20, 40 and 60 g/mold. 40, 80 and 120 g/mole. 15, 30 and 45 g/molf. 30, 50 and 70g/mol
To what final volume should you dilute 60.0mL of a 5.40M KI solution so that 40.0mL of the diluted solution contains 3.75g of KI
When 0.228 g of the hydrate ZnSO4•xH2O is heated, 0.128 grams of anhydrous ZnSO4 remains. What is the value of x in the formula for the hydrate?
Assuming the final mixture has a specific heat capacity of 4.18 J/g*degrees celsius, calculate the final temperature. The enthalpy of fusion for ice is 6.02 KJ/mol.
This wavelength is in the x-ray region of the electromagnetic spectrum. The purple dot is a representation of the x-rays hitting the video camera. Change the Electric Field and Magnetic Field to determine the effect on the x-rays. Did the electric..
Calculate the decomposition for this process at constant pressure and 25o C: CaCO3(s) = CaO(s) + CO2 look up the standard enthalpy formation of the reactant and product
the standard molar enthalpy of vaporization for water is 40.79 kjmol. what mass of steam is required to release 500. kj
Compute the boiling point of this solution if Kf and Kb for H 2 O are given as 1.86°C/m and 0.512 °C/m , respectively.
Need some assistance: 2a) Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate this pH
a cylinder of compressed nitrogen gas contains 867 g n2. if the volume of the cylinder is 22.5 l what is the pressure
write structural formulas for the following condensed structures and determine the functional group in each compound.
A small cube of lithium (density = 0.535 g cm-3) measuring 1.00 mm on each edge is added to 0.500 L of water. The following reaction occurs- 2 Li(s) + 2 H2O(l) ? 2 LiOH(aq) + H2(g)
Describe an experiment using only hot and cold water that would enable you to verify that the heat capacity of your coffee-cup calorimeter is about 1.0x 10 1J/degrees C. Be specific
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