1. Suppose you have a box of 10 marbles, a 50mL gradulated cylinder, and some water. How would you measure the volume of a marble? (Assume that all marbles are equal volume.)
2. Suppose a digital balance reads 0.15g when is placed on the balance and the balance reads 24.68g, what ia the true mass of the beaker?
3. The density of water at 25 degrees is 0.997 g/mL. What % error would you make if you used the value of 1.000g/mL at 25 degree Celcius? (Show your calculations)
1. I would fill the cylinder about half full of water, read the volume, drop in 5 marbles, read the volume. The volume of 5 marbles is the difference in the two readings and the volume of olne marble is the total volume divided by 5.
2. The beaker is 24.68g - 0.15 g = ?g
3. I don't know what you did with the numbers. Probably you calculasted the volume from volume = mass H2O/density
There is a shorter way but I would
calculate volume using 0.997 for what we'll call 1 and do it again using 1.00 for density. Call that one 2.
[(volume for 1-volume for 2)/volume 1)]*100 = %error.
a liquid has a volume of 3.70 L what is its volume in ML? IN CM3?
1. To measure the volume of a marble using the given materials, follow the steps below:
Step 1: Fill the 50mL graduated cylinder with water up to a marked scale, such as 20mL.
Step 2: Carefully drop one marble into the graduated cylinder filled with water.
Step 3: Observe the change in water level and record the new measurement.
Step 4: Subtract the initial water level (20mL) from the new measurement to obtain the volume displaced by the marble.
Step 5: Repeat steps 2-4 for all the marbles.
Step 6: Since all the marbles have the same volume, divide the total volume displaced by the number of marbles (10) to calculate the volume of a single marble.
2. To determine the true mass of the beaker, follow these steps:
Step 1: Calculate the difference between the initial reading (0.15g) and the final reading (24.68g) on the digital balance.
Step 2: The difference in readings represents the mass added to the balance, which is the mass of the beaker.
Step 3: Therefore, the true mass of the beaker is 24.68g - 0.15g = 24.53g.
3. To calculate the percentage error, use the following formula:
Percentage Error = ((Measured Value - Actual Value) / Actual Value) * 100
Given:
Density of water at 25 degrees = 0.997 g/mL
Estimated density of water at 25 degrees = 1.000 g/mL
Step 1: Calculate the absolute difference in densities:
Absolute Difference = Estimated Density - Actual Density
Absolute Difference = 1.000 g/mL - 0.997 g/mL = 0.003 g/mL
Step 2: Calculate the percentage error using the formula:
Percentage Error = (Absolute Difference / Actual Density) * 100
Percentage Error = (0.003 g/mL / 0.997 g/mL) * 100
Percentage Error = 0.301 g/mL * 100
Percentage Error = 0.301%
Therefore, the percentage error made by using the value of 1.000 g/mL instead of the actual value of 0.997 g/mL at 25 degrees Celsius is 0.301%.
1. To measure the volume of a marble using the given materials, you can use the principle of water displacement. Here are the steps:
Step 1: Fill the 50mL graduated cylinder with water so that the water level is slightly below the markings for accuracy.
Step 2: Record the initial water level and its corresponding volume (let's say it's at 10mL).
Step 3: Gently drop a marble into the graduated cylinder. Make sure the marble is fully immersed in the water without touching the sides or bottom of the cylinder.
Step 4: Observe the rise in water level. Let's say the water level rose to 15mL after adding the marble.
Step 5: Calculate the volume of the marble by subtracting the initial water level from the final water level (15mL - 10mL = 5mL). Therefore, the volume of the marble is 5mL.
By measuring the change in water level before and after adding the marble, you can determine the volume of the marble using the principle of water displacement.
2. To find the true mass of the beaker, we need to subtract the tare weight (initial reading) from the final reading.
In this case, the final reading is 24.68g, and the tare weight or initial reading is 0.15g.
True mass of the beaker = Final reading - Tare weight
= 24.68g - 0.15g
= 24.53g
Therefore, the true mass of the beaker is 24.53g.
3. To calculate the percent error, we can use the formula:
Percent Error = [(Experimental Value - Accepted Value) / Accepted Value] * 100
Given:
Experimental value = 1.000g/mL
Accepted value = 0.997g/mL
Percent Error = [(1.000g/mL - 0.997g/mL) / 0.997g/mL] * 100
Simplifying the calculation:
Percent Error = (0.003g/mL / 0.997g/mL) * 100
= 0.302 * 100
= 30.2%
Therefore, the percent error would be 30.2% if you used a value of 1.000g/mL instead of the accepted value of 0.997g/mL.