Common units used to express mass include grams (g) and kilograms (kg), while common units used to express volume include milliliters (mL), cubic centimeters (cm³), and liters (L).įor example, if you have 100 mL of water with a mass of 100 grams, the density of water would be calculated as:ĭensity = 100 g / 100 mL density = 1 g/mL The units used to express the mass and volume will affect the resulting density measurement. In this case, the mass is the weight of the water, and the volume is the amount of space the water takes up. Water density is calculated by dividing the mass of water by its volume. This is why ice floats on top of liquid water. When water reaches 0 degrees Celsius, it expands as it freezes and becomes less dense than liquid water. This is because the density of water decreases as it approaches its freezing point, which is at 0 degrees Celsius. No, water at 20 degrees Celsius is less dense than ice. Is water at 20 degrees Celsius more dense than ice? The density of water in pounds per gallon can also be converted to other units, such as ounces per gallon or grams per milliliter, using conversion factors. For example, if you have 10 gallons of water at 21☌ and a mass of 83.57 pounds, the density of water would be:ĭensity = 83.57 pounds / 10 gallons Density = 8.357 pounds per gallon To calculate the density of water in gallons, you need to convert the mass of water to pounds and then divide it by the volume in gallons. One gallon of water is equivalent to 3.78541 liters or 0.133681 cubic feet. In some applications, it may be necessary to express the density of water in gallons instead of the standard SI units. The density of water at 22.5 degrees Celsius is approximately 997.07 kg/m3. What is the density of water at 22.5 degrees Celsius? To convert between different units of water density, you can use conversion factors or online unit converters.
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