Chemistry, 22.04.2020 03:59 jamayeah02

Which of the following descriptions about standard addition and internal standards are NOT correct?

a) Internal standard is useful when the matrix in the unknown is complicated.
b) Standard addition could be a single standard addition or multiple standard additions to an unknown solution.
c) Standard addition is useful when the matrix in the unknown is complicated.
d) Internal standard is used when instrument response varies from run to run.

Answers: 2

Show answers

Answers

Answer from: rosehayden21

a) Internal standard is useful when the matrix in the unknown is complicated.

b) Standard addition could be a single standard addition or multiple standard additions to an unknown solution.

d) Internal standard is used when instrument response varies from run to run.

Explanation:

(a) Internal standard is useful when the matrix in the unknown is complicated.This statement is not correct as only Standard addition is used in case when the matrix of the unknown is complicated.

b) Standard addition could be a single standard addition or multiple standard additions to an unknown solution. This statement is not correct.

d) d) Internal standard is used when instrument response varies from run to run. This statement is not correct. If the instrument response varies from run to run then. it can be mistake of various other manual and instrumental parameters. This statement is not correct

Answer from: Quest

- "the acute form of diverticulitis can manifest itself with one or more severe attacks of infection and inflammation.

the inflammation of diverticulitis can eventually result in a bowel obstruction, which may cause constipation, thin stools, diarrhea, abdominal swelling or bloating, and abdominal pain."

Answer from: Quest

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

Another question on Chemistry

Chemistry, 22.06.2019 07:20

Describing intermolecular forces use the drop down menus to match the type of intermolecular force to its name dipole dipole interactions dipole induced dipole interactions london dispersion forces hydrogen bond van der waals forces done

Answers: 1

Answer

Chemistry, 22.06.2019 07:30

Compare and contrast the bohr model and the electron cloud models of the atom.

Answers: 1

Answer

Chemistry, 22.06.2019 10:10

What shape would a molecule with two bound groups and two lone pairs have?

Answers: 1

Answer

Chemistry, 22.06.2019 16:00

1. an experiment in your science class lists the materials needed for the lab. it is your job, as a lab partner, to measure out 25 ml of distilled water and 2.5 grams of magnesium. what lab measuring tools would you choose to measure each substance and how would you use each tool to get the correct amounts? be sure to describe the process you would follow step-by-step. (5 points) 2.which of the following is an si base unit for measuring mass? (2 points) ampere gram meter pound 3.which of the following is an si base unit for time? (2 points) decades hours minutes seconds 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer. 5.a pencil beside a metric ruler. the ruler is scaled from 1 centimeter to 10 centimeters, with markings for millimeters between each number. one end of the pencil is beside the 0 on the ruler, and the pencil point is beside the 5. which of the following measurements is accurate but not precise? (2 points) 5 mm 5 cm 50 mm 50 cm 6. which of the following prefixes represents the largest value? (2 points) giga hector kilo milli 7. which of the following types of graphs is best for plotting the percentages of a whole value in a data set? (2 points) bar graph circle graph histogram line graph

Answers: 1

Answer

You know the right answer?

Which of the following descriptions about standard addition and internal standards are NOT correct?<...

Questions

Chemistry, 01.07.2021 15:50

Rank each of the following gases in order of increasing urms assuming equivalent amounts and all gases are at the same temperature and pressure where...