how do you calculate the number of millilliters of 1 M required for an amount of moles?
and how would i find out what remains in the beaker when distilled water is evaporated from a beaker?
sorry i didn't mean to post this twice!
Distilled water, we assume, is pure H2O. When that is evaporated, all we have left is the bottom of the beaker which held the water.
To calculate the number of milliliters of 1 M (1 molar) solution required for a specific number of moles, you can use the formula:
Volume (in liters) = Number of moles / Concentration (in moles per liter)
To convert this volume into milliliters, you can multiply the volume in liters by 1000.
For example, if you have 0.5 moles of a substance and you want to prepare a 1 M solution, the calculation would be:
Volume (in liters) = 0.5 moles / 1 M = 0.5 liters
To convert this to milliliters, multiply by 1000:
Volume (in milliliters) = 0.5 liters × 1000 = 500 milliliters
Therefore, you would require 500 milliliters of the 1 M solution for 0.5 moles.
Regarding your second question, when distilled water is evaporated from a beaker, only the water molecules will evaporate, leaving behind any dissolved impurities or solid substances that were initially present in the water. These impurities can take various forms, such as salts, minerals, or other dissolved substances, depending on the composition of the water. The exact nature of what remains in the beaker after evaporation will depend on the source of the water and any additional solutes or contaminants it may contain. To determine what remains in the beaker, you would need to examine the solid residue or analyze it further using appropriate laboratory techniques or testing methods.