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1. The following program is written in Visual Basic, however it has an error. Rewrite this program to work in PHP to work correctly. Include comments and the program execution output. Option Implicit Public Sub cmdReverse_Click() Dim phrase as String, position As Integer TxtOutput.Text = " " Phrase = txtInput.Text For position = Len(integer) To 1 Step -1 TxtOutput.Text = txtOutput.Text & _ Mid$(phrase, position, 1) Next End Sub
A solution composed of 20.00 g C2H5OH in 60.00 g CCl4 has a density of 1.280 g/mL. Calculate the molarity of C2H5OH in the solution.
the reaction of dinitrogen pentoxide with ammonia to form water vapor and nitrogen is hypothetical in the gas phase
an aqueous solution is 36 by mass silver nitrate agno3 and has a density of 1.41 gml. what is the molality of silver
in the experiment sodium bisulfite solution is added at the end in order tonbsp destroy the unreacted bromine. what
Consider a solution of 0.1 M Zn2+ and 0.1 M Cu2+ that is saturated with H2S. Explain the solubility product constants for ZnS and CuS are 1.1e-21 and 6e-36 respectively. Demonstrate that both ZnS and CuS will precipitate at a pH of 8.
Construct a three-step synthesis of 3-bromocyclopentene from cyclopentane. Drag the appropriate items into the bins. Note that each bin should hold only one item, and not all reagents and structures will be used.
When using the Cahn-Ingold-Prelog rules for prioritizing groups on a stereogenic carbon, priority is first assigned on the basis of
What is the volume occupied by 0.265mol of helium gas at a pressure of 1.28atm and a temperature of 307K
A gas is expanded in a cylinder from 2.00 L to 12.0 L against an external pressure of 1.80 atm. At the same time, it absorbs 2.56 x 103 J of heat from the surroundings. Calculate ?E of the gas in J. (1 L•atm = 101.3J)
Calculate the molarity of chloride ions when HCl is added to Co(NO3)2 ? (this is the cobalt complex and chloride experiment)
The 1H-NMR spectrum of compound A, C5H10O, consists of the following signals: ? 9.72 (triplet, 1H), 2.40 (quartet, 2H), 1.58 (quintet, 2H), 1.31
Consider the reaction: CaCO3(s)===CaO(s)+CO2(g) An equilibrium mixture of this reaction at a certain temperature was found to have [CO2] = 0.478M. What is the value of the equilibrium constant at this temperature
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