Question

a) oil tube
b) funnel
c) beaker
d) evaporating dish

1. read the graduated cylinder depicted below. what is the volume?

watch sig figs!
a) 49.5ml
b) 49.44ml
c) 49.4ml
d) 49.95ml

1. an example of an si base unit is

a) kilogram
b) newton
c) watt
d) liter

1. convert 311.4 kpa to pascals.

a) 3 114 pa
b) 311,400 pa
c) 3,114,000 pa
d) 0.3114 pa

1. what is the name for the instrument below?

a) crucible
b) bowl
c) evaporating dish
d) beaker

Explanation:

Step1: Analyze question 23

When reading a graduated cylinder, the volume is read at the bottom of the meniscus. The markings on the cylinder suggest each small division is \(0.1\space mL\). The meniscus is at \(49.4\space mL\).

Step2: Analyze question 24

SI base units include kilogram (\(kg\)) for mass. Newton (\(N\)) is a derived unit (\(1N = 1kg\cdot m/s^{2}\)), Watt (\(W\)) is a derived unit (\(1W=1J/s = 1kg\cdot m^{2}/s^{3}\)), and liter (\(L\)) is a non - SI unit for volume.

Step3: Analyze question 25

To convert \(kPa\) to \(Pa\), use the conversion factor \(1kPa = 1000Pa\). So, \(311.4kPa\times1000=\frac{311.4}{1}\times\frac{1000}{1}=311400Pa\).

Step4: Analyze question 26

An evaporating dish is a shallow, round container used for evaporating solvents. A crucible is deeper and more often used for high - temperature reactions. A bowl is a general - purpose container not specific to laboratory use in the same way, and a beaker has a spout.

Answer:

1. c) \(49.4mL\)
2. a) kilogram
3. b) \(311400Pa\)
4. c) evaporating dish