1. In your own words define the terms accuracy and precision. Accuracy- The quality or stet of being correct or precise Precision-The ,or fact of being quality, condition ex aci and acco rate. What causes parallax error and how do you avoid it? 2. Parallax error is by viewing with respect the abject appCLv to De at position ön dal scale. the meniscUs Jans an accurate measure Ment ana ava;d arilycased cased 15 Primarily the object at an oblique ang!e to the scale ,which makes the Parallan errors. 3. The mass of five 30 mL samples of DI water was measured using a buret and analytical balance. The masses were determined to be 30.0010 g, 29.9998 g, 29.8889 g, 30.0002 g and 29.9959 g respectively. What is the average volume of the samples if the temperature at the time of the experiment was 22.5 °C? How accurate is the buret? What is the standard deviation in the measurements? Use full sentences to explain your answers and show all calculations to get full credit. Avy.:29.97716 nt accuraie 25 Chemistr y Glassware and Measure ment Laboratory 2

Question

How do I solve number 3? I found the average.

1. In your own words define the terms accuracy and precision.
Accuracy-
The quality or stet of being
correct or precise
Precision-The
,or fact of being
quality, condition
ex aci
and acco rate.
What causes parallax error and how do you avoid it?
2.
Parallax error is
by viewing
with respect
the abject appCLv to
De at position ön dal scale. the meniscUs
Jans an accurate measure Ment ana ava;d
arilycased
cased
15
Primarily
the object at an oblique ang!e
to the scale ,which makes
the
Parallan errors.
3. The mass of five 30 mL samples of DI water was measured using a buret and analytical balance.
The masses were determined to be 30.0010 g, 29.9998 g, 29.8889 g, 30.0002 g and 29.9959 g
respectively. What is the average volume of the samples if the temperature at the time of
the experiment was 22.5 °C? How accurate is the buret? What is the standard deviation in
the measurements? Use full sentences to explain your answers and show all calculations to get
full credit.
Avy.:29.97716
nt accuraie
25
Chemistr y Glassware and Measure ment
Laboratory 2
View transcribed image text
Expand

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Chemistry

Related Chemistry Q&A

Find answers to questions asked by students like you.

Q: The concentration of acetylcholine (a neurotransmitter) in a sample can be determined from the pH ch...

A: Given information,The volume of acetylcholine is 11mLpH values are relate to concentration of the so...

Q: How much heat is evolved in converting 1.00 mol of steam at 135.0 ∘C to ice at -55.0 ∘C? The heat ca...

A: To determine evolved heat:The formula to calculate heat for cooling three phases where it changes fr...

Q: What is the difference between polar covalent bonds and hydrogen bonds?

A: Polar covalent bonds are formed when electrons are shared equally between the atoms.  Among the atom...

Q: 1. A metallic solid ingot has a mass of 14.7 grams. It was loaded into a graduated cylinder containi...

A: The density of ingot is calculated in step two.

Q: When chromium metal is added to nitric acid, the following reaction takes place Cr (s) + 6 HNO₃ (aq)...

A: The balanced chemical reaction is shown as follows:

Q: Propane can be turned into hydrogen by the two-step reforming process. In the first step, propane an...

A: The balanced equation can be defined as the chemical equation in which the number of atoms is presen...

Q: Naturally occurring neon exists as three isotopes. 90.51% is Ne-20 with a mass of 19.99 amu, 0.27% i...

A: Click to see the answer

Q: A chemist prepares a solution of sodium carbonate (Na2CO3) by measuring out 25.g of sodium carbonate...

A: Given:Mass of Na2CO3 = 25.0 g.Volume of Na2CO3 solution = 100 mL = 0.1 L.Molar mass of Na2CO3 = 106 ...

Q: Explain why your percent yield could be less than 100% and why it can be greater than 100% (in scien...

A: Percent yield is the ratio of actual yield to the theoretical yield or it is the ratio of experiment...

Q: The reactant concentration in a second-order reaction was 0.230 M after 230 s and 4.20×10−2 M after ...

A: The rate law for a second order reaction is given below,

Q: Consider the following equilibrium: 2NOCl(g)  2NO(g) + Cl2(g) with K = 1.6 × 10–5. 1.00 mole of pure...

A: For the given reaction, the equation for equilibrium constant can be written as below.

Q: A second analyst was attempting to determine the percent KHP in an unknown sample, similar to that i...

A: From the given molarity of NaOH, number of moles of NaOH can be calculated followed by the calculati...

Q: Which order should this go in?

A: Atomic radius is the distance between the atomic nucleus and outermost shell having electrons of an ...

Q: The equation for photon energy, E, is E=hcλ   where h = 6.626×10−34 J⋅s (Planck's constant) and c = ...

A: Given that,

Q: What is entropy? Why is entropy important in discussing the formation of solutions?

A: The degree of disorderness is referred to as entropy. Gas particles will have higher positive entrop...

Q: What type of intermolecular forces acts between molecules of water, and of HF, and of NH3 to cause t...

A: Intermolecular forces:The force of attraction that acts between two different molecules is said to b...

Q: A heat lamp produces 32.8 watts of power at a wavelength of 6.5 micro meters. How many photons are e...

A: Energy of one photon can be determined using Planck’ equation.

Q: What is the pH and pOH of a: a) 0.20M NH4CI solution? b) 0.47M NaCN solution?

A: Click to see the answer

Q: The reactant concentration in a second-order reaction was 0.230 MM after 230 s and 4.20×10−2 MM afte...

A: Click to see the answer

Q: 1. Which substance below would you predict to most readily enter the gas phase from the liquid phase...

A: The lower the boiling point of the compound, most readily enters into gas phase from liquid phase.Th...

Q: Please solve Second question

A: The given reactions are,From the above equations, it is clear equation (3) can be obtained by adding...

Q: A patient is suspected of having low stomach acid, a condition known as hypochloridia. To determine ...

A: Given:Volume of HCl (V1) =20.00 mL =0.020 LMolarity of KOH (M2) = 1.70 x 10-4 MVolume of KOH (V2) = ...

Q: Convert the following measurement. mg 0.471=1 dL

A: 0.01 g/L = 1 mg/dL0.471 g/L = 47.1 mg/dL

Q: What does it mean to say that a substance is soluble in another substance? Which units are used in r...

A: What is meant by a substance soluble in another substance is to be explained. The units that are use...

Q: Ethylene glycol has a density of 1.11 g/cm^3. What is the volume in liters of 589.02 kg of this liqu...

A: Given,Mass of ethylene glycol = 589.02kg. Density of ethylene glycol = 1.11g/cm3.

Q: I don't know where to start.

A: Using the given data, graph can be drawn by plotting pressure against volume and is given below:

Q: Why should the wavelength scale of a spectroscope be calibrated?

A: Given:The wavelength scale of a spectroscope should be calibrated.

Q: add the following masses: 465 mg, 0.000364 kg, 389 cg, and 3.40 dg. what is the total mass in grams?

A: The given values are converted into grams using appropriate conversion factors as follows:

Q: The density of palladium (Pd) is 12.0 g/mL and the cell volume is 5.89 ✕ 10−23 mL. Determine the num...

A: The relationship between the theoretical density of an element, number of atoms (n) present in the u...

Q: An unknown liquid was found to have density of 69.22 lb/ft^3. The density of ethylene glycol (the li...

A: Given information:Density of unknown liquid = 69.22 lb/ft3Density of ethylene glycol = 1.1088 g/mL

Q: Consider an electron in the  N shell. Express your answers in terms of h  and in SI units. (a) What ...

A: (a) Calculation of the smallest orbital angular momentumGiven that the electron is in N shell. The e...

Q: What is the pH of a solution made by adding 23.5 g of KC2H3O2 to 400 mL of 0.80 M HC2H3O2? (Ka for a...

A: Molarity of KC2H3O2 is calculated as follows:

Q: Which of the following is false and WHY? a) an orbital can accommodate at most 2 electrons b) orbita...

A: (a)According Pauli Exclusion Principle, no two electrons should not have same four quantum numbers i...

Q: Iron has a work function (Φ) of 4.50 eV. What is the longest wavelength of light that will cause the...

A: The longest wavelength of light that will eject an electron from a iron surface is calculated as,

Q: PLEASe provide in depth explanitons I will be using this to study

A: Molecular dipole is said to be present in a molecule if the atoms present in it has electronegativit...

Q: What conversion factor (similar to molar mass) would allow us to convert between moles of solute and...

A: The number of moles of a particular solute in the given solution is termed as molarity of the soluti...

Q: A sample consisting of 1.00 mol of the nitrogen gas is expanded isothermally and reversibly from 24....

A: Temperature can be determined using Ideal Gas Equation as follows,

Q: A chemist prepares a solution of silver nitrate (AgNO3) by measuring out 7.27g of silver nitrate int...

A: Given:Mass of AgNO3 = 7.27gVolume of AgNO3 solution = 100 mL = 0.1 LMolar mass of AgNO3 = 169.87 g/m...

Q: What is the molarity of a solution of ammonia that is 34% ammonia if the density of the solution is ...

A: Given,A bottle of concentrated aqueous ammonium is labeled 34% NH3by mass and density = 0.88 g/mLThe...

Q: 11. Add curved arrows to the following structures to show how electron pairs must be moved to interc...

A: The given ion is NO3-. The contributing structures that are used to show the bonding in the molecule...

Q: Use the electron configurations of Si and O to explain why these atoms combine chemically in a one-t...

A: The electron configuration of Si and O atoms are given below.

Q: Given the equation 2A(g)  2B(g) + C(g). At a particular temperature, K = 1.6 × 104.Addition of chemi...

A: Le Chatelier's principle:When a change is applied to a system at equilibrium, the equilibrium will s...

Q: Since different isotopes of the same element have the same chemical behavior, how can they be separa...

A: Click to see the answer

Q: Is it possible that some parts of the universe contain antimatter whose atoms have nuclei made of an...

A: The antiparticles bind with one another to form antimatter as exactly same as the ordinary particle ...

Q: 7. Now let's combine our knowledge of bond-line formulas and formal charge. How many H-atoms are on ...

A: The valency of carbon atom is 4.  Carbon forms four bonds.  Carbon gets positive charge by losing on...

Q: How much heat is evolved in converting 1.00 molmol of steam at 135.0 oC to ice at -45.0 oC? The heat...

A: Number of mol of water = 1molSo, amount of water = 18 gInitial temperature, Ti = 135 oCFinal tempera...

Q: Explain the organic  compound and functional group

A: Organic compound:A class of chemical compounds which contains one or more carbon atoms linked covale...

Q: The air in a cylinder with a piston has a volume of 220 mL and a pressure of 650 mmHg. If the pressu...

A: Given,Volume of air (V1) = 220mL.Initial Pressure of air (P1) = 650mmHg.Final Pressure of air (P2) =...

Q: Determine the molecular formula for each of the following. In other words, supply the subscripts. 3....

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...

Q: How much ice (in grams) would have to melt to lower the temperature of 355 mL of water from 24 ∘C to...

A: Given,Volume of water = 355mL.Initial temperature = 240C.Final temperature = 40C.

Transcribed Image Text

1. In your own words define the terms accuracy and precision. Accuracy- The quality or stet of being correct or precise Precision-The ,or fact of being quality, condition ex aci and acco rate. What causes parallax error and how do you avoid it? 2. Parallax error is by viewing with respect the abject appCLv to De at position ön dal scale. the meniscUs Jans an accurate measure Ment ana ava;d arilycased cased 15 Primarily the object at an oblique ang!e to the scale ,which makes the Parallan errors. 3. The mass of five 30 mL samples of DI water was measured using a buret and analytical balance. The masses were determined to be 30.0010 g, 29.9998 g, 29.8889 g, 30.0002 g and 29.9959 g respectively. What is the average volume of the samples if the temperature at the time of the experiment was 22.5 °C? How accurate is the buret? What is the standard deviation in the measurements? Use full sentences to explain your answers and show all calculations to get full credit. Avy.:29.97716 nt accuraie 25 Chemistr y Glassware and Measure ment Laboratory 2