1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mojhsa [17]
2 years ago
7

For a concentration technique, Stotal is given as 19.31 ± 0.035, Smb is 0.22 ± 0.008, and kA is 0.154 ± 0.007 ppm–1, where Stota

l is the signal, kA is the method’s sensitivity for the analyte and Smb is the signal from the method blank. If we want the overall percent uncertainty to be 2.6%, which statement is false below?
Group of answer choices:
A. Improving the signal’s uncertainty will improve the overall uncertainty
B. Uncertainty in the method’s sensitivity dominates the overall uncertainty
C. We must improve the uncertainty in kA to ±0.004 ppm–1
D. None of the above
Chemistry
1 answer:
professor190 [17]2 years ago
8 0

Answer:

B

Explanation:

You might be interested in
Question 5 (5 points)
Dima020 [189]

Answer:

They Are all O's/oberavtions, because inference is using facts and reasoning, which is not the case here.

Explanation:

6 0
2 years ago
Read 2 more answers
5 points
Orlov [11]

Answer:

The correct option is (a).

Explanation:

We need to find the product of given numbers.

First number = 29.5

Second number = 240

Product of two numbers = 29.5 × 240

= \dfrac{295}{10}\times 240

Zeroes from numerator and denominator get cancelled.

So,

=295\times 24\\\\=7080

Hence, the correct option is (a).

7 0
3 years ago
The lewis dot notation for two atoms is shown. What is represented by this notation? K loses one portion to CI, K gains one port
telo118 [61]

Answer:

K loses one electron to CI

Explanation:

The lewis electron dot notation shows only the chemical symbol of the element surrounded by dots to represent the valence electrons.

  We have atom of K with one valence electrons

   Cl with 7 valence electrons

For an electrostatic attraction to occur, both particles must be charged. To do this, one of the species must lose an electron, and the other gains it.

This will make both species attain a stable octet;

   Hence, K will lose 1 electron and Cl will gain the electrons.

6 0
3 years ago
The Earth's moon is unusually large. Two popular theories of the moon's origin include the "sister world" hypothesis, which stat
Verizon [17]

Answer: D. They show that neither theory is complete and entirely correct.

Explanation:

Theory is the set of rules and principles that describe and explain a particular phenomenon (the existence of the moon in this case) and is subject to changes as new evidence emerges that gives meaning to it.

In this sense, there are many theories about the Earth's moon formation and two of the "accepted" theories are described before the question. In addition, both theories explain in a certain way the reason why the Moon is predominantly composed of elements similar to those found on Earth.

However, both theories seem to be incomplete when trying to explain our Moon's origin.

8 0
3 years ago
Read 2 more answers
How many moles of oxygen are present in 33.6l of the gas at 1atm and 0c
andreev551 [17]

The answer is: 1.5 moles of oxygen are present.

V(O₂) = 33.6 L; volume of oxygen.

p(O₂) = 1.0 atm; pressure of oxygen.

T = 0°C; temperature.

Vm = 22.4 L/mol; molar volume at STP (Standard Temperature and Pressure).

At STP one mole of gas occupies 22.4 liters of volume.

n(O₂) = V(O₂) ÷ Vm.

n(O₂) = 33.6 L ÷ 22.4 L/mol.

n(O₂) = 1.50 mol; amount of oxygen.

5 0
3 years ago
Other questions:
  • In examining an organic compound, you discover that it contains the following functional group. What class of organic compound i
    9·2 answers
  • What is the product of ( 2.324 cm x 1.11 cm) expressed to the correct number of significant figures?
    10·1 answer
  • Water has a density 1.0 g/cm3. What is the mass of 10.0 cm3 of water?
    12·1 answer
  • The heats of combustion of ethane (C2H6) and butane (C4H10) are 52 kJ/g and 49 kJ/g, respectively. We need to produce 1.000 x 10
    8·1 answer
  • Answer Quick
    15·2 answers
  • Help me plz plz bbbbb
    13·2 answers
  • Can a hype Glow in the dark ?
    15·1 answer
  • Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16)
    11·1 answer
  • 2. I take and absorb the nutrients that your body needs from your
    8·1 answer
  • Determine the molar mass of a 0.458-gram sample of gas having a volume of 1.20 l at 287 k and 0.980 atm. group of answer choices
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!