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
lutik1710 [3]
3 years ago
7

Select all that apply. Which of the following statements are true? Significant figures are an indicator of the certainty in meas

urements Significant figures communicate the level of precision in measurements Significant figures in a measurement are all measured digits, and one estimated digit None of the above
Chemistry
2 answers:
Kitty [74]3 years ago
3 0

Significant figures are an indicator of the certainty in measurements

Significant figures communicate the level of precision in measurements

otez555 [7]3 years ago
3 0

Explanation :

Significant figures : It is defined as the figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy (precision).

Significant figures in a measurement are all measured digits, and one estimated digit. That means, for example: 784 in this digit, the digit '78' are the certain digits but the digit '4' is an uncertain digit.

Hence, The correct options are,

Significant figures are an indicator of the certainty in measurements.

Significant figures communicate the level of precision in measurements.

Significant figures in a measurement are all measured digits, and one estimated digit.

You might be interested in
A student pushes on a crate with a force of 100N directed to the right. What force does the crate exert on the student?
Kamila [148]
Hello!

The force on the student is equal to the force the student exerts, so 100N is your answer. 

Hope this helped :))
6 0
3 years ago
The following five beakers, each containing a solution of sodium chloride (NaCl, also known as table salt), were found on a lab
mixas84 [53]

Answer:

See the answers below

Explanation:

1)  100. mL of solution containing 19.5 g of NaCl  (3.3M)

2)  100. mL of 3.00 M NaCl solution (3 M)

3) 150. mL of solution containing 19.5 g of NaCl  (2.2 M)

4)  Number 1 and 5 have the same concentration (1.5M)

MW of NaCl = 23 + 36 = 59 g

For number 3

          59 g ------------------- 1 mol

           19,5 g -----------------   x

  x = 19.5 x 1/59 = 0.33 mol

Molarity (M) = 0.33 mol/0.150 l = 2.2 M

For number 4,

Molarity (M) = 0.33mol/0.10 l = 3.3 M

For number 5

Molarity (M) = 0.450/0.3 = 1.5 M

4 0
3 years ago
Read 2 more answers
1. Ethanol and 2,6-dimethylphenol both have hydroxyl groups that can be deprotonated by a base. Why does ethanol act as a solven
Volgvan

Anions are solvated in protic hydrogen-bonding solvents (such as ethanol). Consequently, nucleophiles are less reactive. Since soft nucleophiles are less strongly solvated than hard nucleophiles, these solvents boost the relative reactivity of soft anions.

<h3>Ethanol is either a nucleophile or a base.</h3>

The ethanol is a base  Because carbocation is an extremely reactive species, a base or nucleophile as weak as ethanol can replace or remove it. SN1 and E1 would not be conceivable without the carbocation or a strong departing group.

<h3>How do solvents impact anionic nucleophile's reactivity?</h3>

In polar aprotic solvents, nucleophilic substitution reactions of anionic nucleophiles often proceed more quickly. The normal relative reactivity order in such solvents (like DMSO)is Anions are solvated in protic hydrogen-bonding solvents (such as ethanol). Consequently, nucleophiles are less reactive.

Learn more about nucleophiles here:-

brainly.com/question/27127109

#SPJ4

3 0
2 years ago
Match the following descriptions with the correct polysaccharide, note if you answer any part of this question incorrectly a sig
Ad libitum [116K]

Answer:

Glycogen. Cellulose. Amylose. Cellulose. Amylopetin and Glycogen. Amylopetin and Cellulose.

Explanation:

Glycogen is the form that glucose is stored in human body.

Cellulose is the structural part of plant cell walls and human cannot digest it.

Amylose is the polysaccharide linked mainly by the the bonds of \alpha 1,4 glycosidic.

Cellulose is an unbranched polysaccharide linked mainly by the bonds of  \beta 1,4 glycosidic.

Amylopetin and Glycogen are branched polysaccharides linked by the bonds of \alpha 1,4 glycosidic and \alpha 1,6 glycosidic.

Amylopetin and Cellulose are mainly stored in plants.

4 0
4 years ago
PLEASE ANSWER
zhuklara [117]
D) light is reflecting in the direction indicated by T.
6 0
4 years ago
Read 2 more answers
Other questions:
  • Which pair of elements is both malleable and able to conduct heat?
    7·1 answer
  • 1) How many grams of CO are needed to react with an excess of Fe2O3 to produce 209.7g Fe? Show your work.
    8·2 answers
  • Which part of a plant cell is responsible for converting light energy into chemical energy?
    6·2 answers
  • You are following a recipe that calls for 1 egg and 1/3 cup of oil for every cup of flour. In the refrigerator you find only 4 e
    7·1 answer
  • Predict which of the following transition metal ions has a color Cr3+, Cd2+, Hg2+, V2+
    14·2 answers
  • A 125 mL bubble of hot gases at 213 ∘C and 1.77 atm is emitted from an active volcano. Part A What is the final temperature, in
    6·1 answer
  • Susan needs to simplify the expression shown below what should be her first step
    10·1 answer
  • Define respiration in plants:
    14·2 answers
  • Find the mass of 3.66 moles of nitrogen.
    13·2 answers
  • What is khasra record? What it tells?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!