prelaboratory assignment\n1. provide the key - term that corresponds to each of the following…

prelaboratory assignment\n1. provide the key - term that corresponds to each of the following definitions.\n(a) the amount of mass in a unit volume of matter; for example, 1.00 g/ml\n(b) a procedure for obtaining the mass of a sample by first weighing a container and then weighing the container with the sample\n(c) the degree of inexactness in an instrumental measurement\n(d) to rinse glassware (e.g., a pipet) with a sample liquid to avoid dilution by water on the inside surface\n(e) the clear lens at the surface of a liquid inside a graduated cylinder\n(f) determining volume of a sample by measuring the volume of water displaced\nkey terms: condition, density, meniscus, uncertainty, volume by displacement, weighing by difference\n2. a 10.0 - ml sample of liquid is pipetted into a 125 - ml flask with stopper. the mass of liquid is found to be 7.988 g. refer to example exercise 1 and calculate the density of the liquid.\n3. state the volume of liquid shown in each of the following graduated cylinders.

prelaboratory assignment\n1. provide the key - term that corresponds to each of the following definitions.\n(a) the amount of mass in a unit volume of matter; for example, 1.00 g/ml\n(b) a procedure for obtaining the mass of a sample by first weighing a container and then weighing the container with the sample\n(c) the degree of inexactness in an instrumental measurement\n(d) to rinse glassware (e.g., a pipet) with a sample liquid to avoid dilution by water on the inside surface\n(e) the clear lens at the surface of a liquid inside a graduated cylinder\n(f) determining volume of a sample by measuring the volume of water displaced\nkey terms: condition, density, meniscus, uncertainty, volume by displacement, weighing by difference\n2. a 10.0 - ml sample of liquid is pipetted into a 125 - ml flask with stopper. the mass of liquid is found to be 7.988 g. refer to example exercise 1 and calculate the density of the liquid.\n3. state the volume of liquid shown in each of the following graduated cylinders.

Answer

1.

Brief Explanations:

(a) Density is mass per unit volume. (b) Weighing by difference involves weighing container first then with sample to get sample mass. (c) Uncertainty represents inexactness in measurement. (d) Rinsing glass - ware with sample liquid is called conditioning. (e) The curved surface of liquid in cylinder is meniscus. (f) Measuring volume by water displacement is volume by displacement.

Answer:

(a) density (b) weighing by difference (c) uncertainty (d) condition (e) meniscus (f) volume by displacement

2.

Explanation:

Step1: Recall density formula

The formula for density $\rho=\frac{m}{V}$, where $m$ is mass and $V$ is volume.

Step2: Substitute given values

Given $m = 7.988\ g$ and $V=10.0\ mL$. Then $\rho=\frac{7.988\ g}{10.0\ mL}=0.7988\ g/mL$.

Answer:

$0.7988\ g/mL$

3.

Brief Explanations:

Read the volume at the bottom of the meniscus. For the first cylinder, the meniscus is at 57 mL. For the second cylinder, the meniscus is at 60 mL.

Answer:

First cylinder: 57 mL Second cylinder: 60 mL