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
worty [1.4K]
3 years ago
13

What is 3.311 x 10^24 in 2 sig figs?

Chemistry
1 answer:
Hunter-Best [27]3 years ago
7 0

Answer:

D. 3.3 x 10^24

Explanation:

In a number representing a measurement, the significant figure are those digits that have a meaningful contribution to specify the resolution of the measurement.

When a number is written in scientific notation, it is written as:

N=m \cdot 10^n

where

m is the base

n is the exponent

When a number is written in this form, the number of significant figures is the number of digits contained in m.

In this problem, our number is initially written as

3.311\cdot 10^{24}

We see that here "m" contains 4 digits, so here we have 4 significant figures.

In order to reduce it to 2 significant figures, we have to rewrite 3.311 as 3.3, therefore the new number will be:

3.3\cdot 10^{24}

Which is option D.

You might be interested in
An aqueous solution of iron(II) iodide has a concentration of 0.215 molal. The percent by mass of iron(II) iodide in the solutio
Basile [38]

Answer:

6.24%

Explanation:

Molality by definition means a measurement of the number of moles of solute in solution with 1000 gm or 1Kg solvent. Notice the difference that Molarity is defined on the volume of solution and Molality on the mass of solvent.

So, An aqueous solution of iron(II) iodide has a concentration of 0.215 molal.

means 0.215 moles are present in 1 Kg of solvent.

The molar mass of Fe2I = 309.65 g / mole

mass of FeI2 = moles x molar mass

= 0.215 x 309.65

=66.57 gm

mass % of FeI2 = mass of FeI2 x 100 / total mass

= 66.57x 100 / (1000 +66.57)

= 6.24%

                           

8 0
3 years ago
Express in scientific notation. Make sure your answer has the same number of significant figures as the starting value. (6.0 x 1
Greeley [361]
I believe the correct answer from the choices listed above is the second option. The expression (6.0 x 104) (3.1 x 10-1) is equal to 1.9 x 10^4. We only have two significant figures from the starting expression that is why we rounded of the product from 1.86 to 1.9.
3 0
3 years ago
How many moles of na contain 7.88x1021 atoms of na
labwork [276]

Answer:

the answer to the qustion is 0.013089701 na

Explanation:

n/a

7 0
2 years ago
Which of the following gases experience the greatest degree of deviation from ideal behavior under high pressures and low temper
xz_007 [3.2K]

A) CH4

In general, methane reactions are difficult to control. Partial oxidation to methanol, for example, is a rather difficult reaction because the chemical reactions that occur continue to form carbon dioxide and water even though the amount of oxygen available is insufficient.

<h2>Further explanation </h2>

Methane is the simplest hydrocarbon in the form of gas with the chemical formula CH4. Pure methane does not smell, but if used for commercial purposes, a bit of sulfur is usually added to detect leaks that might occur.

Methane is a greenhouse gas. Methane is used in chemical industrial processes and can be transported as frozen liquids (liquefied natural gas, or LNG).

Methane is a major component of natural gas, around 87% of volume.

Methane is not toxic, but is highly flammable and can cause explosions when mixed with air.

Learn More

CH4 / Methane brainly.com/question/9473007

Benefits of methane brainly.com/question/10818009

Details

Class: college

Subject: chemistry

Keywords: ch4, methane, chemicals

8 0
3 years ago
Flat vs. Fizzy Soda (If you have the answers for the rest of the questions 9-17 please let me know) thankyou!
pashok25 [27]

When the concentrations of CO2 and H2CO3 are both horizontal lines then the rate of the forward reaction is the same as the rate of the reverse reaction.

<h3>What is rate of reaction?</h3>

The term rate of reaction refers to how fast or slow a reaction proceeds. Recall that the rate  of reaction is measured from the rate of disappearance of reactants or the rate of appearance of products.

When the [CO2] and [H2CO3 ] are both horizontal lines, the rate of the forward reaction is the same as the rate of the reverse reaction.

Let us recall that the reaction is reversible hence addition of H2CO3  will increase the concentration of H2CO3, the reverse reaction would be favored.

Learn more about rate of reaction: brainly.com/question/8592296

4 0
3 years ago
Other questions:
  • The following observations are made about two hypothetical elements A and B: The A?A and B?Bbond lengths in elemental A and B ar
    6·1 answer
  • 3 point different between fundamental units and derived units<br>​
    13·2 answers
  • As a result of the transfer of an electron from a less electronegative atom to a more electronegative atom,
    11·1 answer
  • Can someone please help me?
    8·1 answer
  • In a chemical reaction, an iron atom became the ion Fe2+. What happened to the iron atom?
    12·2 answers
  • The rate constant of an SN1 reaction depends on the nucleophile b. The rate constant of an SN2 reaction does not depend on the n
    11·1 answer
  • If the pOH of a solution is 9.1, what is the concentration of OH- ions in that solution?
    7·1 answer
  • For each pair circle the neutral element with the largest atomic radius K or Cs ,Ti or As ,Br or F
    5·1 answer
  • What species has an atom with an oxidation number of 3
    14·1 answer
  • The radius of a single atom of a generic element X is 169 picometers (pm) and a crystal of X has a unit cell that is body-center
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!