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
rewona [7]
3 years ago
10

How many significant figures are in the measurement 81,140 grams

Chemistry
1 answer:
GrogVix [38]3 years ago
8 0
Answer:

5

Explanation:

In order to be able to say how many sig figs are used for the measurement 811.40 g, you need to know that

<span><span>non-zero digits are always significant</span><span>a trailing zero that follows a decimal point and a non-zero digit is always significant</span></span>

In your case, the measurement

<span>811.40</span>

has four non-zero digits and one significant trailing zero.

<span><span><span>8,1,1,4</span>→</span> non-zero digits<span><span>8,1,1,</span>0→</span> significant trailing zero</span>

Therefore, you can say that this measurement has <span>five significant figures</span>

<span>811.40→</span> <span>five significant figures</span>

You might be interested in
Suppose you want to separate a mixture of the following compounds: salicylic acid, 4-ethylphenol, p-aminoacetophenone, and napth
Elodia [21]

Answer:

The procedure you will use in this exercise exploits the difference in acidity and solubility just described.

(a) you will dissolve your unknown in ethyl acetate (an organic solvent). All of the possible compounds are soluble in ethyl acetate.

(b) you will extract with sodium bicarbonate to remove any carboxylic acid that is present.

(c) you will extract with sodium hydroxide to remove any phenol that is present.

(d) you will acidify both of the resulting aqueous solutions to cause any compounds that were extracted to precipitate.

6 0
3 years ago
What explanation accounts for the observation that the mass of the products in reaction #1 (open system) were not equal?
Anna007 [38]

Answer:

The law of conservation of mass states that matter can not be created or destroyed in a chemical reaction.

Explanation:

5 0
2 years ago
What are the weighting laws?
lora16 [44]

Answer: A comprehensive legal term for uniform standards ascribed to the quantity, capacity, volume, or dimensions of anything. Legislation that adopts and mandates the use of a uniform system of weights and measures is a valid exercise of Police Power, and such laws are constitutional.

Explanation:

8 0
3 years ago
This chart lists four elements from the periodic table.
aksik [14]
Iodine and Calcium is the correct answer
3 0
3 years ago
Read 2 more answers
Zn + 2HCI --&gt; ZnCl2 + H2
Elena-2011 [213]
Moles= mass\ relative formula mass(Ar)
moles of zinc= 7.9/30= 0.263
so we have 0.263 moles of zinc, and you need twice the amount of chlorine so therefore 0.526moles of chlorine= 0.526x 17=8.942g of chlorine
i cba to work the rest out but the most reasonable answer is 0.24 mol however if you need to use working outs, use the formula i provided earlier
8 0
3 years ago
Other questions:
  • The shielding of electrons gives rise to an effective nuclear charge, Zeff, which explains why boron is larger than oxygen. Esti
    10·1 answer
  • 6. In a hexagonal close-packed crystal, every atom (except those on the surface) has
    12·1 answer
  • True or false? a closed system interacts with the environment constanly?
    12·1 answer
  • A military jet cruising at an altitude of 12.0kmand speed of 1900./kmh burns fuel at the rate of 74.4/Lmin. How would you calcul
    5·1 answer
  • A student mixed 115 g of sugar, 350 g of water and 5 g of spices. What will be the mass of the solution?
    14·1 answer
  • How many centimeters are in 1 mile? Use the equalities 1 mile = 5280 feet; 1 foot = 12 inches; and 1 centimeter = 0.394 inches.
    9·2 answers
  • Give the percent yield when 162.8 g of CO2 are formed from the reaction of excess amount of
    5·2 answers
  • When a system is at equilibrium, ________. When a system is at equilibrium, ________. the reverse process is spontaneous but the
    7·1 answer
  • What happens when waves travel down
    12·1 answer
  • Do protons and neutrons attract?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!