What is the molarity of the stock solution
Luminol is a reagent used to detect blood at crime scenes. A technician prepares a stock solution by adding 6.0 g of luminol (molar mass=177 g/mol) to 50.0 mL of H2O. What is the molarity of the stock solution?
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What is the entropy change for a particle in this system if the final number of microstates is 0.617 times that of the initial number of microstates?
How do the unshared pairs of electrons in water and nitrogen, affect the bond angles between the central atom and the attached atoms
A box is sliding up an incline that makes an angle of 11.8 ° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.147. The initial speed of the box at the bottom of the incline
what is the pH of the mixture when 25 mL of 0.200 M KOH has been added to 25.00 mL of 0.200 M acetic acid
A mass of 2.50 g of hydrated copper(II) sulfate is placed in a crucible and heated. On heating, 1.59 g of whiteanhydrous copper(II) sulfate is left behind. Determine the ratio of water to copper(II) sulfate.
If the 58-N backpack in Figure 6-22 of the text begins to slide when the spring (k=105 N/m) stretches by 1.2 cm, what is the coefficient of static friction between the backpack and the table?
A student collects 22.4 mL of a gas by the process of water displacement at a temperature of 0 °C. If the barometric pressure is 764.6 torr and the vapor pressure of water at 0 °C is 4.6 mmHg, how many moles of gas did the student collect?
A volume of saline solution weighted 26.5g at 4 degrees Celsius. The same volume of water at 4 degrees Celsius weighed 25.4g. What is the density of the saline solution?
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