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
Tcecarenko [31]
2 years ago
10

How many moles are in 15.3 grams of KNO3?

Chemistry
1 answer:
Vedmedyk [2.9K]2 years ago
4 0

Answer:

0.151 mol

Explanation:

molar mass of KNO3 = (39.1 + 14 + 3×16) g/mol = 101.1 g/mol

number of moles = mass/molar mass

n = m/M = 15.3 g/(101.1 g/mol) = 0.151 mol

You might be interested in
the diagram below shows DNA molecules. What do the broken lines connected to hydrogen atoms represent in this diagram?
uranmaximum [27]

Answer is: hydrogen bonds.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

According to the principle of base pairing hydrogen bonds could form between adenine and thymine (two hydrogen bonds between this nucleobases) and guanine and cytosine (three hydrogen bonds between this nucleobases).

Adenine and guanine are purine derivatives and thymine and cytosine are pyrimidine derivates.

5 0
2 years ago
Read 2 more answers
PLS HELP STOICHIOMETRY/CHEM!!!
Mariulka [41]

The molecular formula of the compound that we are required to find is the compound C4H8O8

<h3>What is empirical formula?</h3>

The empirical formula of a compound is a formula that shows the ratio of each atom present in the compound. We will start by dividing each mass with the relative atomic mass of the atom.

Carbon -  48.38 g/12   Hydrogen - 6.74 g/1    Oxygen -  53.5 g/16

Carbon - 4                    Hydrogen - 6.74         Oxygen -  8.9

Dividing through by the lowest ratio;

Carbon - 4/4            Hydrogen -  6.74/4           Oxygen 8.9/4

Carbon   1               Hydrogen    2                     Oxygen  2

The empirical formula is CH2O2.

To obtain the molecular formula; brainly.com/question/11588623

[12 + 2 + 32]n = 180

n = 180/[12 + 2 + 32]

n =4

The compound C4H8O8

Learn more about empirical formula:

7 0
2 years ago
How many grams are in 3.14 x 1015 molecules of CO?
Vesnalui [34]

Answer:

Explanation:

Not Many

1 mol of CO has a mass of

C = 12

O = 16

1 mol = 28 grams.

1 mol of molecules = 6.02 * 10^23

x mol of molecules = 3.14 * 10^15        Cross multiply

6.02*10^23 x = 1 * 3.14 * 10^15             Divide by 6.02*10^23

x = 3.14*10^15 / 6.02*10^23

x = 0.000000005 mols

x = 5*10^-9

1 mol of CO has a mass of 28

5*10^-9 mol of CO has a mass of x                        Cross Multiply

x = 5 * 10^-9 * 28

x = 1.46 * 10^-7 grams

Answer: there are 1.46 * 10-7 grams of CO if only 3.14 * 10^15 molecules are in the sample

5 0
2 years ago
During dry weather, the water level in a small pond drops because of
Sophie [7]

Water levels tend to drop in dry weather because of evaporation. The hot temperatures will cause the water to achieve its gaseous state and go up into the atmosphere.
6 0
3 years ago
PLEASE ANSWER...........WILL MARK BRAINLIEST!!!!!!!
ANTONII [103]

Answer:

<h2>The Alkali metal halide may precipitate or there may be no change at all</h2>

Explanation:

       Alkali metal cations are positively charged. Halogen anions are negatively charged. When a solution of Alkali metal cations is added to a solution of Halogen anions, there are two possibilities :

  • The alkali metal halide( salt formed from reation of the two ions) may precipitate if the Ionic product is higher than the Solubility product.
  • However, if it can remain in the solution, it will remain so. No chemical changes happen with respect to these both ions. Nothing willl happen.

   There is no reaction happening in either of the cases because both species are already in ionic form before addition, hence they continue to be in this form.

3 0
3 years ago
Other questions:
  • What is the body systems main job
    10·1 answer
  • 30 POINTS!!!!!! PLEASE HURRY!!!! Four boxes of increasing size and weight must be pushed up a ramp. To push the boxes at the sam
    9·2 answers
  • Which human body resembles mitochondria
    15·1 answer
  • Why is carbon considered tetravalent?
    12·1 answer
  • How many moles are in 100 grams of NaCl
    12·2 answers
  • You are making a map of your state in your map scale 1 cm equals 10 km if two cities are 200 km apart how many centimeters apart
    13·1 answer
  • Bombardier beetles inject boiling hydrogen peroxide, or H2O2, into their victims. It then decomposes into hydrogen and oxygen ga
    6·1 answer
  • Help plssss no linkkkkk
    11·2 answers
  • An object has a gravitational potential energy that is 800 Joules. Its
    6·1 answer
  • What is the solution and solvent in Kool-Aid?​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!