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
marissa [1.9K]
3 years ago
6

A helium balloon contains 16.9 L of helium at STP. How many atoms of helium are in the balloon

Chemistry
1 answer:
Zepler [3.9K]3 years ago
8 0
4.54×10^(23) atoms He
You might be interested in
Which solute would be more effective at lowering the freezing point of water: MgCl2 and KNO3? Explain.
Phantasy [73]

Answer:

AlCl₃.

Explanation:

Adding solute to water causes depression of the boiling point.

The depression in freezing point (ΔTf) can be calculated using the relation:

ΔTf = i.Kf.m,

where, ΔTf is the depression in freezing point.

i is the van 't Hoff factor.

van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.

Kf is the molal depression constant of water.

m is the molality of the solution (m = 1.0 m, for all solutions).

(1) NaCl:

i for NaCl = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.

∴ ΔTb for (NaCl) = i.Kb.m = (2)(Kf)(1.0 m) = 2(Kf).

(2) MgCl₂:

i for MgCl₂ = no. of particles produced when the substance is dissolved/no. of original particle = 3/1 = 3.

∴ ΔTb for (MgCl₂) = i.Kb.m = (3)(Kf)(1.0 m) = 3(Kf).

(3) NaCl:

i for KBr = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.

∴ ΔTb for (KBr) = i.Kb.m = (2)(Kf)(1.0 m) = 2(Kf).

(4) AlCl₃:

i for AlCl₃ = no. of particles produced when the substance is dissolved/no. of original particle = 4/1 = 4.

∴ ΔTb for (CoCl₃) = i.Kb.m = (4)(Kf)(1.0 m) = 4(Kf).

So, the ionic compound will lower the freezing point the most is: AlCl₃

4 0
3 years ago
Read 2 more answers
What ionic bond occurs between what particles?
Sladkaya [172]
B positive and negative ion 
4 0
3 years ago
Complete each statement to identify the form of asexual reproduction.
Mrrafil [7]

Spore formation is a form of asexual reproduction used by mushrooms and molds.

During  budding, the offspring grows from the body of the parent.

Fragmentation is a form of asexual reproduction that must be followed by regeneration.

Explanation:

Asexual reproduction is the type of reproduction where the gamete formation and fusion have no relevance or existence. It functions on the process of somatic cell division via mitosis and the offsprings are identical to their parents.

The spore formation occurs in fungi through sporangia, bursting open to shed spores, forming into a new young ones. Budding occurs out as an outgrowth of the parent and attains maturity and separates. Fragmentation is the process where the parents fall apart into pieces and regeneration follows.

8 0
3 years ago
Read 2 more answers
How many atoms are in water is it 24 or 2.<br> Explain
Artemon [7]
There are actually three: One oxygen atom and two hydrogen atoms.
8 0
3 years ago
What is the difference between Mitosis and Meiosis?
kondor19780726 [428]
Mitosis produces two diploid (2n) somatic cells that are genetically identical to each other and the original parent cell, whereas meiosis produces four haploid (n) gametes that are genetically unique from each other and the original parent (germ) cell.
7 0
2 years ago
Other questions:
  • Im to lazy to do this.
    6·1 answer
  • What is the enthalpy for the reaction represented in the following energy diagram?
    6·1 answer
  • In the chemical reaction below, calcium (ca) and water (h2o) react to form calcium hydroxide (ca(oh)2) and hydrogen gas (h2).ca
    7·1 answer
  • Name two hormones produced by the endocrine system and describe how they work with other organ systems to maintain homeostasis
    8·2 answers
  • What happens to a glass of sugar solution when sugar is added to it?
    5·2 answers
  • Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it
    14·1 answer
  • Temperature and kinetic energy are ___________ proportional.
    9·2 answers
  • The atomic mass of an element is equal to the number of:
    15·2 answers
  • Light-dependent reactions: ​
    10·1 answer
  • Which feature of the state means absolute authority within the country?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!