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
vredina [299]
2 years ago
14

How many molecules are im 4.9 moles of h2o?​

Chemistry
1 answer:
svet-max [94.6K]2 years ago
3 0

The number of units in one mole of a substance is 6.022140857 × 10^23. This is irregardless of whether the particle is an atom, a molecule or an ion.

Therefore, we multiply the number of moles by the Avogadro's number

4.9×6.022140857 × 10^23= 2.95084902×10^24 molecules

You might be interested in
What is the osmotic pressure of a 100 ml of toluene solution that contains a total of 0.005 moles of a polymer dissolved in it a
allsm [11]

Osmotic pressure is the pressure that would have to be applied to a pure solvent to prevent it from passing into a given solution by osmosis.

That can be mathematical computed from the expression:

Osmotic pressure=C×R×T

Where,

C= Concentration

R=Gas constant

T=Temperature

Concentration=Number of moles of solute/Volume(L)

=0.005*1000/100

=0.05

R= 0.08206 atm L/mol K

T=25+273

=298

Osmotic pressure= 0.05×0.08206×298

=1.2 atm

4 0
3 years ago
What devices will you use to measure the mass and the volume in this experiment? (density)
bekas [8.4K]

Answer:

Methods for determining or delivering precise volumes include volumetric pipets and pycnometers; less precise methods include burets, graduated cylinders, and graduated pipets. In this experiment, you will measure masses and volumes to determine density. Four different metal cylinders are investigated.

Explanation:

8 0
2 years ago
True or false: The Earth's rotation causes the winds to curve.
Rashid [163]

Answer:

true

Explanation:

3 0
2 years ago
Classify the four reactions that your group analyzed today as being either endothermic or exothermic
ArbitrLikvidat [17]
Chemical reactions are basically divided into two major classes depending on whether the reaction lose energy or gain energy from the environment during the course of the reaction. The two classes of reaction are exothermic and endothermic reaction.
An exothermic reaction is a type of reaction in which the reaction system lose energy to the environment and thus, the energy content of the reactants is more than that of the product formed. Because of this, the enthapyl change of an exothermic reaction is always negative. 
An endothermic reaction is a type of reaction in which the reaction system absorb energy from the environment. Thus, the energy contents of the products is always higher than that of the reactants and the enthapyl change of the reaction is always positive. During the course of the reaction, the reaction container is usually cold to the touch because energy is been absorbed from the environment.
4 0
3 years ago
1. How many moles of oxygen are made if 12.0 moles of potassium chlorate react?
Alex787 [66]

Answer:

18

Explanation:

12*3=36

36/2=18

567890

3 0
3 years ago
Other questions:
  • A<br> In 25 words or fewer, what is the scientific question for the boiling<br> water experiment?
    14·1 answer
  • Write the balanced molecular, ionic, and net ionic equations for the reaction when a solution of lithium phosphate is mixed with
    6·1 answer
  • Sulfuric acid is formed when sulfur dioxide reacts with oxygen and water. Write a balanced chemical equation for the reaction. (
    14·1 answer
  • The sodium atom loses an electron to form a sodium Ion (Na+). Which statement is correct with respect to its atomic radius?
    8·1 answer
  • ZnSO4 +<br> +<br> LINO, → ---- Zn(NO3)2<br> +<br> Li,SO4<br> Balanced equation
    5·1 answer
  • Balance the equation for <br> __Ca+__Pb(NO3)2—__Pb+__Ca(NO3)2
    13·1 answer
  • Which organism is able to form organized patterns of behavior through the process of integration because it has ganglia?
    9·2 answers
  • Anybody know chemistry Grahams law ?
    8·1 answer
  • Differentiate between homogenous and heterogeneous catalysis​
    13·1 answer
  • Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier know as the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!