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
Maksim231197 [3]
3 years ago
6

How many grams of H2O is 4.5 x 10 15 molecules? *

Chemistry
1 answer:
IgorLugansk [536]3 years ago
7 0

Answer:

It is b, 1.3 × 10 ⁻⁷

Explanation:

We know that 1 mol of H₂O is ≈ 18g

We need to get out of molecules and into moles so that we can figure out how many grams of H₂O it would be.

Starting with what we're given, let's set up our equation:

4.5×10¹⁵ molecules × (1 mol / 6.02 × 10²³molecules) × (18gH₂O / 1 mol H₂O) = 1.345 × 10⁻⁷g H₂O

This is kept to 2 significant figures and ∴ 1.3 × 10⁻⁷

Further explanation:

We start out with molecules. We cancel it out using Avagadro's number which is 6.02 × 10²³ = 1 mol. Then, we want to get into grams which means that for 1 mol of H₂O, it is equivalent to 18g using the atomic mass units ( 2(1.008) + 15.999).

Hopefully, this helps you!

You might be interested in
Identify the dominant intermolecular attraction in bh3.
k0ka [10]
The molecule BH3 is trigonal planar, with B in the center and H in the three vertices. Ther are no free electrons. All the valence electrons are paired in and forming bonds.

There are four kind of intermolecular attractions: ionic, hydrogen bonds, polar and dispersion forces.

B and H have very similar electronegativities, Boron's electronegativity is 2.0 and Hydrogen's electronegativity is 2.0.

The basis of ionic compounds are ions and the basis of polar compounds are dipoles.

The very similar electronegativities means that B and H will not form either ions or dipoles. So, that discards the possibility of finding ionic or polar interactions.

 Regarding, hydrogen bonds, that only happens when hydrogen bonds to O, N or F atoms. This is not the case, so you are sure that there are not hydrogen bonds.

When this is the case, the only intermolecular force is dispersion interaction, which present in all molecules.

Then, the answer is dispersion interaction.
6 0
2 years ago
Determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 40.00 mL of 0.00150 M calcium hydroxide.
a_sh-v [17]

The volume of H₃PO₄ : 13.33 ml

<h3>Further explanation</h3>

Given

0.003 M  Phosphoric acid-H₃PO₄

40 ml of 0.00150 M Calcium hydroxide-Ca(OH)₂

Required

Volume of H₃PO₄

Solution

Acid-base titration formula  

Ma. Va. na = Mb. Vb. nb  

Ma, Mb = acid base concentration  

Va, Vb = acid base volume  

na, nb = acid base valence  (amount of H⁺/OH⁻)

H₃PO₄⇒3H⁺ + PO₄³⁻ ⇒ 3 H⁺ = valence = 3

Ca(OH)₂⇒Ca²⁺ + 2OH⁻⇒ 2 OH⁻ = valence = 2

Input the value :

a = H₃PO₄, b = Ca(OH)₂

0.003 x Va x 3 = 0.0015 x 40 x 2

Va = 13.33 ml

8 0
2 years ago
When a force is applied to an object, its _____, the object _________________________________________________________.
Arada [10]
......................

7 0
3 years ago
What would be the greatest difference in using an open ceramic coffee mug rather than an insulated mug with a lid as a calorimet
STALIN [3.7K]

Answer:

Hi. Increased evaporation would be the greatest difference.

Explanation:

Have you ever had a drink in a mug with a lid? When you would remove the lid, all of the liquid on the lid is the liquid that would evaporate if there was no lid.

6 0
2 years ago
Read 2 more answers
Write the difference between isomerism and allotropy with one example each.
fredd [130]

Answer:

hope it helps ..

Explanation:

Allotropes can be defined as different types of compounds made out of the same single element but in different chemical formulas and different arrangements. Isomers can be defined as the chemical compounds that have a similar molecular formula but with different structural formulae. Graphite and Diamond.

7 0
2 years ago
Other questions:
  • QUICK!
    13·2 answers
  • Which is more metallic<br> a) Gold<br><br> b) Bismuth
    11·1 answer
  • What is the most important role that water plays for living organisms
    12·2 answers
  • Two solid samples each contain sulfur, oxygen, and sodium, only. These samples have the same color, melting point, density, and
    10·1 answer
  • What is the average kinetic energy of 1 mole of a gas that is at 100 degrees Celsius?
    6·1 answer
  • YO SOMEONE ANSWER DIS ASAP I GOT 2 MINUTES
    12·1 answer
  • Okay so I am working on polyatomic ions and need help what is the name of this element KCH3COO
    12·2 answers
  • Choose two ways carbon returns to nature from animals
    11·1 answer
  • Which of the following gas samples would have the largest volume, if all samples are at the same temperature and pressure?
    14·1 answer
  • 15. What type of energy changes the physical states of matter?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!