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Kipish [7]
3 years ago
12

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
Chemistry
2 answers:
svp [43]3 years ago
6 0

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.  

Karolina [17]3 years ago
5 0
1. D)
2. I think the correct answer from the choices listed above is option C. The tools that <span>should be used to record the most complete data about a gas are a manometer and a thermometer. Pressure and temperature are important measurements for a gas since from these data we can calculate any other properties of the gas.</span>
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A 2.4 L balloon holds 3.7 mol He. If 1.6 mol He are added to the balloon, what is the new volume?
Elanso [62]
For this question, lets apply Avagadro's law
when Pressure and temperature are constant, the volume occupied is directly proportional to the number of moles of gases.
\frac{V}{n} = k
where V-volume, n-number of moles and k - constant 
Therefore at 2 instances 
\frac{V1}{n1} =  \frac{V2}{n2}
where V1 and n1 are for 1st instance 
and V2 and n2 are for 2nd instance 
therefore 
\frac{V1}{n1} = \frac{V2}{n2}
V1 = 2.4 L
n1 = 3.7 mol
n2 = 3.7 + 1.6 = 5.3 mol
since more He moles are added at the 2nd instance its the sum of the moles.
V2 needs to be calculated \frac{2.4}{3.7}  = \frac{V2}{5.3}
V2 = 2.4 x 5.3 / 3.7
     = 3.4 L
Answer is 1st option 3.4 L


6 0
3 years ago
What are the physical states in which water can exist in the atmosphere? Give an example of how we can sense each state.
Sliva [168]
Liquid - rain
Solid - snow
Gas - water vapour (when it evapourates from the lithosphere)
3 0
2 years ago
Which element has the highest standard reduction potential? fluorine hydrogen lead lithium
Stolb23 [73]
I think the correct answer from the choices listed above is the first option. The element that has the highest standard reduction potential would be fluorine. Hope this answers the question. Have a nice day. Feel free to ask more questions.
3 0
3 years ago
Read 2 more answers
What heat is liberated in the formation of 10.0 grams of sulfur hexafluoride, SF6, from the elements sulfur and fluorine?
tensa zangetsu [6.8K]

Answer:

Q=-76.7kJ

Explanation:

Hello,

In this case, for such formation of sulfur hexafluoride, the standard enthalpy of formation is -1220.47 kJ/mol (data extracted from NIST database). Next, we compute the moles in 10.0 grams of sulfur hexafluoride as shown below:

n_{SF_6}=10.0gSF_6*\frac{1molSF_6}{146.06 gSF_6}=0.0685mol

Next, for the given energy, we compute the total heat that is liberated:

Q=-1220.47\frac{kJ}{mol}*0.0685 mol\\\\Q=-76.7kJ

Finally, we conclude such symbol has sense since negative heat is related with liberated heat.

Best regards.

8 0
3 years ago
A compounds empirical formula is H.O. If the formula mass is 34 amu what is the molecular formula?
BigorU [14]

Answer:

C

Explanation:

1. The molecule has to have a ratio of 1 hydrogen to 1 oxygen.

2. Hydrogen = 1amu, Oxygen = 16amu. (2*2)+(16*2) = 34amu

7 0
2 years ago
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