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what is the molar mass of glucose if 22.5g gives a freezing point of -0.930 C when dissolved in 250 g of water?
What is the percent hydrogen (H) by weight of a solution containing 53.5 mL of CH3COCH3? The density of acetone is 0.788 g/mL.
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines
Calculate the concentrations of the protoneated and unprotonated forms of bromothymol blue in 100 mL of a pH 8.1 buffer solution to which 1.0 mL of 0.005 M solution of bromothymol blue in 80% wate/20%ethanol has been added.
a 26.0 ml sample of a liquid was found to have a mass of 13.0g. what is the density of the liquid?
how many milliliters of 0.54M HCL solution are needed to react completely with 4.6g of zinc to form zinc (II) chloride?
A flask contains a mixture of Ne(g) and Ar(g). There are 0.250 mol of Ne(g) which exerts a pressure of 205 mmHg. If the Ar(g) exerts a pressure of 492 mmHg.
what is the final concentration of NaOH when 50.0 mL of .200 M NaOH is added to 50.0 mL of 0.500 M NaOH?
Consider the following reaction: PCl5(g) -> PCl3(g) + Cl2(g) .At equilibrium, [PCl5] = 2.00 M and [PCl3] = [Cl2] = 1.00 M. If suddenly 1.00 M PCl5(g),PCl3(g), and Cl2(g) are each added.
How many moles of oxygen are combined with 4.20 moles of chlorine atoms in C2O7?
If the methane contained in 5.00L of a saturated solution at 25 ^circ rm C was extracted and placed under STP conditions, what volume would it occupy.
Determine the amount of heat given off when 1.26 x 104 g of NO2 are produced express your answer (in kJ)?
Important information about Heat of Reaction, The combustion of butane produces heat according to the equation 2C4H10(g) + 13O2(g) --> 8CO2(g) + 10H2O(l) deltaHrxn= -5314kJ
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