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Rita divides Avogadro's number (approximately 6.022 mc002-1.jpg 1023) by 2.0550 to calculate the number of atoms in a sample.
Which expression gives her result to the correct number of significant figures?
A gas cylinder with a movable piston initially contains .25 moles of neon in a 5 L. If .5 moles of helium are added to this gas cylinder, what will be the final volume
Use ICE table and henderson-hasselbach equation to calculate pH of BUFFER A after your particular volume of acid was added to achieve pH change of 1.0.
How much heat (in kJ) is required to warm 13.0g of ice, initially at -11.0?C, to steam at 110.0?C? The heat capacity of ice is 2.09 J/g??C and that of steam is 2.01 J/g??C
Write a balanced chemical equation, with integer coefficients, for the complete combustion of C7H12.
A solution is prepared by mixing 4 ml of .20 M NH3, 1 ml of .20 M HCl, and 5 ml of water. Calculate the concentration of NH3 and NH4+ in the final diluted solution.
How many moles of CF4 can be produced when 5.00 mol C react with 12.00 mol F2.
how would your calculated value for the molecular weight of your unknown been affected high low no effect if a small
Draw a stick model of a water molecule. Sketch a space filling model of a water molecule, show polarity by labeling positive and negatively charged regions of the molecule.
calculate the minimum number of grams of C3H8(g) that must be combusted to provide the energy necessary to convert 2.93 kg of H2O from its solid form at -13.0°C to its liquid form at 75.0°C.
Draw the Lewis structures for the following compounds. 1) PBr3 Using VSEPR, what is the shape about the P. 2) N2H2 3) CH3OH Using VSEPR, what is the shape about the C and about the O? 4) CO2 Using VSEPR, what is the shape about the C? 5) C2H4
Write a mechanism for the reaction that takes place when 1-butanol is refluxed with a small quantity of phosphoric acid. Include all steps, use curved arrows to show electron movements, and be sure to explain what the function of the phosphoric ac..
A 31.43 ml volume of .108M NaOH is require to reach the phenolphthalein endpoint in the titration of a 4.441g sample of vinegar. Calcute the percent acetic acid in the vinegar.
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