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How much water needs to be added to a 5g vial of drug powder to make a 2.5 percent solution?
Wiki User
∙ 11y ago
195 grams.
Wiki User
∙ 11y ago
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What number must you add to complete the square of x2 10x15?
The constant needs to be 25. What needs to be added depends on the sign associated with 15 which is not visible to me.The constant needs to be 25. What needs to be added depends on the sign associated with 15 which is not visible to me.The constant needs to be 25. What needs to be added depends on the sign associated with 15 which is not visible to me.The constant needs to be 25. What needs to be added depends on the sign associated with 15 which is not visible to me.
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To make a 2% solution from a 25% solution, you need to dilute it. Let x ml be the amount of water needed. Using the equation for mass balance: 0.25(40) = 0.02(40 + x), solve for x to find that x = 875 ml of water needs to be added.
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To convert the solution from m percent salty to 2m percent salty, you need to add m/2 grams of salt. This will ensure that the ratio of salt to water in the solution is doubled, resulting in a 2m percent salty solution.
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What mass of NaCl is needed to make 414 g of a 3.06 percent NaCl solution?
If your solution is a total of 414g and 3.06% of it needs to be NaCl, then you just take 414 x .0306 = grams of NaCl. The rest of the grams will be from other species in the solution.
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How many grams of calcium nitrate needs to be added to 400g of water to make a solution that is 12.5 percent by mass of calcium nitrate?
Call the unknown mass m. Then, from the problem statement, m/(400 + m) = 12.5 % = 0.125. Applying standard algebra techniques, multiply both sides of this equation by (400 + m) to result in m = 0.125(400 + m); m(1 - 0.125) = 400 X 0.125; 0.875m = 50; m = 57.1 grams, to the justified number of significant digits.
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Jorge has four liters of 30 percent acid solution how much water should he add to make 25 percent acid solution'?
Jorge needs to add 2 liters of water to the 30% acid solution to make a 25% acid solution. This can be calculated using a dilution formula: initial acid amount / final total amount = final acid concentration.
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