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
VikaD [51]
3 years ago
13

Determine the number of moles in 4.50 g of H2O

Chemistry
1 answer:
Irina18 [472]3 years ago
7 0

0.25 moles of water (H₂O)

Explanation:

To calculate the number of moles of a particular substance we use the following formula:

number of moles = mass / molecular weight

molecular wight of water (H₂O) = number of H atoms × atomic weight of H + number of O atoms × atomic weight of O

molecular wight of water (H₂O) = 2 × 1 + 1 × 16 = 18 g/mol

number of moles of water (H₂O) = 4.5 / 18

number of moles of water (H₂O) = 0.25 moles

Learn more about:

number of moles

brainly.com/question/10165629

brainly.com/question/9081560

#learnwithBrainly

You might be interested in
Which is true about a chemical reaction
victus00 [196]
I think A. is the answer
8 0
3 years ago
Read 2 more answers
Realiza los cálculos para determinar la cantidad de KOH 90%, que se necesita para preparar 100 ml de solución 1N.
attashe74 [19]

Answer:

6.23 KOH 90% son necesarios

Explanation:

Una solución 1N de KOH requiere 1equivalente (En KOH, 1eq = 1mol) por cada litro de solución.

Para responder esta pregunta se requiere hallar los equivalentes = Moles de KOH para preparar 100mL = 0.100L de una solución 1N. Haciendo uso de la masa molar de KOH y del porcentaje de pureza del KOH se pueden calcular los gramos requeridos para preparar la solución así:

<em>Equivalentes KOH:</em>

0.100L * (1eq / L) = 0.100eq = 0.100moles

<em>Gramos KOH -Masa molar: 56.1056g/mol-:</em>

0.100moles * (56.1056g/mol) = 5.61 KOH se requieren

<em>KOH 90%:</em>

5.61g KOH * (100g KOH 90% / 90g KOH) =

<h3>6.23 KOH 90% son necesarios</h3>
8 0
2 years ago
How many significant figures are there in the measurement 64,000 mg?
DedPeter [7]
For sig figs, you count the total number of numbers that aren’t 0, you only count 0 if they are after a decimal point. since there is not a decimal point, there are 2 significant figures, answer A
3 0
2 years ago
Read 2 more answers
How is rock candy formed
Readme [11.4K]

Answer:

A supersaturated solution made out of sugar and oil is crystallized on a surface suitable for crystal nucleation such as a stick.

I hope this helps.

3 0
3 years ago
Why are salt and sugar both able to dissolve in water, even though the solutes have different types of chemical bonding?
Rama09 [41]

Answer:

ions are surrounded by hydrogen ends with positive partial charge. In this way the salt is dissolved in water. Sugar is a molecular compound formed by covalent bonds. In a polar covalent bond, electrons are shared unevenly

Explanation:

5 0
3 years ago
Other questions:
  • Question 6(Multiple Choice Worth 3 points)
    14·2 answers
  • Jamal wants to make a model of a hill near his house to test the way the slope affects how rain runs down the hill. Which type o
    11·2 answers
  • What is standard volume
    6·1 answer
  • How many grams of oxygen would be produced by the electrolysis of 72.0 grams of water ? 2H2O--&gt; O2+2H2 (Must be made to fit i
    9·1 answer
  • What percentage of boys Chose walking
    12·1 answer
  • 32. Calculate How many kilojoules of heat are re-
    7·1 answer
  • Uhu khanay sai kia hota hai
    9·1 answer
  • What is public property​
    11·2 answers
  • Help! Quicklyyyy! Easy science thing.
    11·1 answer
  • some regions of a polypeptide may coil or fold back on themselves. this is called , and the coils or folds are held in place by
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!