From one drop of H2O (molecular weight: 18) weighing 0.032g, calculate the following: a. Moles of water b. Number of water molecules c. Number of hydrogen atoms How do you calculate the molar mass of water? How would you calculate the molar mass of water?
We can prepare the reagent by weighing out the amount equal to the number of moles required for a substance multiplied to its molar mass.Answer and Explanation: Determine the mass, m, of the given amount of water. We do this by simply multiplying the given number of moles, n = 0.85 mol...
Say you need to make a solution of 1M NaCl for a reaction you are running. How would you know how much salt to weigh out and then add to a given volume of water? To do this, you need to find a way to relate the mass of a compound (salt) to the number of moles of that comp...
This requires use of the molar heat capacity formula. That means you need the specific heat of water and the molar mass of water. The molar mass of water is 18.0 g/mol. molarheatcapacity=(4.18Jmol∗K)(18.0g1mol) Multiplying that together you get: molarheatcapacity=75.2J/mol∗K...
To calculate the molal depression constant (Kf) of water using the given latent heat of fusion of ice, we can follow these steps:Step 1: Identify the given values - Latent heat of fusion of ice (L) = 1436.3 cal/mol - Molar mass
To calculate the heat capacity of 20 kg of water, we can follow these steps: Step 1: Understand the given data- Specific heat capacity of water (S) = 4.2 J/g°C- Mass of water (m) = 20 kg Step 2: Convert mass from kilograms to gramsSince the specific heat capacity is given in...
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Divide the mass of the substance in grams by its molecular weight. This will give you the number of moles of that substance that are in the specified mass. For 12 g of water, (25 g)/(18.015 g/mol) = 0.666 moles. When dividing by two units that both use grams in their measurement...
Express this as moles per kilogram solution. Now, you have 250 ml of water, which is about 250 g of water (assuming a density of 1 g/ml), but you also have 3 grams of solute, so the total mass of the solution is closer to 253 grams than 250. Using 2 significant figures, it's...
This example has neither the moles nor liters needed tofind molarity, so you must find the number ofmolesof thesolutefirst. To convert grams to moles, the molar mass of the solute is needed, which can be found on certainperiodic tables. ...