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For direct detection of fungal element, how much 40% KOH solution needed to make 50ML of 10% КОН?
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- What volume of 0.250 M NaOH is required to react completely with 0.0100 moles of H2SO4? (a) 80.0 mL (b) 60.0 mL (c) 40.0 mL (d) 125 mL63 gallons of a 26% acid solution are mixed with 44 gallons of a 80% acid solution. What is the acid concentration of the resulting mixture? Round to the nearest percent.170.0 mL of 0.12 M C2 H5NH2 with 285.0 mL of 0.20 M C2 H5 NH3 Cl
- you have 10mL of a 60% stock dye solution. what is the maximum amount of a 12% dye solution you could prepare? how would you go about preparing the 12% dye solution?How to prepare 1 mM to 5 mM AgNO3 solution in 50 mL water?How much Na2SO4 is required to precipitate 2.50 g of Ba(NO3)2 in the form of BaSO4? AW: Ba = 137.33, Na = 22.99, S= 32.07, N = 14.01, O = 16.00 O 2.50 g O 0.0176 mole O 0.0191 mole O 1.36 g
- What volume of 3.00 M CH3NH2 solution is needed to provide 0.370 mol of CH3NH2?Group of answer choices 0.901 mL 1110 mL 123 mL1a) 0.1% = ? ug/ml? Only include the number and not any units b) What is the concentration of your stock in ug/ml? Only include the number and not any units c`The molecular weight of tartrazine is 534.4 g/mole. What is the concentration of your stock solution in mM? Be sure to give your answer in milliMolar to TWO decimal places. d)What dilution of your stock do you need to get the first standard (100 ug/ml)? Express as 1:x, where x is the fold dilution needed.30 20 10 From the procedure 2. Assemble the simple distillation apparatus as generally shown in Figure SD.1 in the lab manual, ensuring that the thermometer bulb is aligned at, or slightly below, the Y in the distillation head. Each ground joint is greased by putting three or four stripes of grease lengthwise around the male joint and pressing the joint firmly into the other without twisting. 3. Attach a water condenser to the distillation head. 4. Remember, water goes in the bottom and out the top. Attach a clamp holder to the end of the drain tube to keep it weighted in the drain. Turn water to a trickle. If it is slowly draining, it is high enough. Begin a low flow of water through the condenser. 5. Place the set up on a heating/stir plate. 6. Turn on the hot plate to start heating the solution. Monitor the temperature and the boiling of the solution throughout the distillation process. 7. Record the temperature of the distillate when the first drops are recovered. 30.0 8. Adjust…
- What is the molarity of an aqueous solution that contains 0.0720 g C2H6O2 per gram of solution . The density of the solution is 1.04 g/mL X STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 1.04 62.08 6.022 x 1023 0.0720 1.21 x 10-3 4650 1.12 1000 1.21 1 0.001 g C2H.O2 mol C2H6O2 g C2H&Oz/mol g solution/mL mL solution g C2H6O2/g solution M C2H6O2 L solution g solutionIf 45.0 mL of solvent is added to 85.0 mL of an 80.0% solution, what would the new concentration be? Group of answer choices 80.0% 1.63% 61.5% 90.3% 52.3%1) 0.1% w/v = ? mg/100 ml? 2) 0.1% = ? ug/ml? 3)What is the concentration of your stock in ug/ml? 4)The molecular weight of tartrazine is 534.4 g/mole. What is the concentration of your stock solution in mM? Be sure to give your answer in milliMolar to TWO decimal places.
