1.)which of these statements correctly compares probeware (such as an electronic temperature probe) to traditional analog tools (such as a liquid-based thermometer)

a) measurements by traditional analog tools are good to a larger number of significant figures.
b) measurements by traditional analog tools are less prone to experimental error
c) probeware is typically very difficult to transport
d) probeware is useful for obtaining many meaurements in rapid succession.

2.) which tools should be used to record the most complete data about a gas?

a) a gas-collecting bottle and an electronic balance
b) a graduated cylinder and a thermometer
c) a syringe and a manometer

1. The correct answer is option D, that is, probeware is useful for obtaining many measurements in rapid succession.  

Probewares are usually used to gather precise information, with less amount of error in real time, and evaluate the outcome with the help of powerful tools. The probewares are easy to handle and at the same time are cost-effective. Thus, the correct statement is that probeware is useful for attaining many measurements in quick succession.  

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

the answer is na (sodium)