How many additional grams of solute must be added
when you have a solution of potassium chlorate containing 4g at 65 degress celcius. How many additional grams of solute must be added to it to make the solution saturated?
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In the formula sodium phosphate (Na3PO4) how many moles of sodium are represented? How many moles of phosphorus? How many moles of oxygen?
The most common source of copper is the mineral chalcopyrite. How many kilograms of chalcopyrite must be mined to obtain 320. of pure copper?
A sample of gas is collected over water at a temperature of 35.0C when the barometer pressure reading is 742.) torr. What is the partial pressure of oxygen?
A solution of ammonia and water contains 2.00×10^25 water molecules and 5.30×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
A 4.22g sample of CuS was added to excess HCl, and the resulting H2S was collected over water. What volume of H2S was collected at 32 degrees celsius when the atmospheric pressure was 749 torr (1atm=760torr)? The vapor pressure of water at this t
Translate the following word equations into unbalanced chemical equations and explain how the equations represent what happens,
How many of joules of heat are needed to raise the temperature of 10.0g of aluminum from 22 degrees C, if the specific heat of aluminum is 0.90 j/g degrees c.
0.2 M HCl is used to neutralize 20 mL of 0.35 M NaOH. How many moles of H+ are needed to neutralize the OH-?
The reactant concentration in a zero-order reaction was 7.00×10-2 M after 155 s and 1.50×10-2 M after 370 s. What is the rate constant for this reaction?
A sample of helium effuses through a porous container 6.5 times faster than does unknown gas X? what is the molar mass of the unknown gas?
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Using Javascript and html, Create array with 3 "best times" (numbers). Write the array so the times in order, from lowest to highest.
Identify students with internalizing behaviors because they often happen within the student and do not cause disruptions in the classroom environment.
Open a PHP scope; - You should a regular function that that divides two numbers (num1, num2) passes num1 by value, while passes num2 by reference;
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Perform a quick internet search of your favorite movement represented in this module and find a work of art that we haven't studied that belongs to that style.