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
sammy [17]
3 years ago
8

Explain reasons why helium is used to fill balloon instead of hydrogen having a lighter weight​

Chemistry
1 answer:
Elis [28]3 years ago
6 0

Answer:

Explanation: hydrogen is a combustible gas. It easily explodes and can cause skin burns

You might be interested in
Hydrofluoric acid and Water react to form fluoride anion and hydronium cation, like this HF(aq) + H_2O(l) rightarrow F(aq) + H_3
maksim [4K]

Answer:

Kc = 1.09x10⁻⁴

Explanation:

<em>HF = 1.62g</em>

<em>H₂O = 516g</em>

<em>F⁻ = 0.163g</em>

<em>H₃O⁺ = 0.110g</em>

<em />

To solve this question we need to find the moles of each reactant in order to solve the molar concentration of each reactan and replacing in the Kc expression. For the reaction, the Kc is:

Kc = [H₃O⁺] [F⁻] / [HF]

<em>Because Kc is defined as the ratio between concentrations of products over reactants powered to its reaction coefficient. Pure liquids as water are not taken into account in Kc expression:</em>

<em />

[H₃O⁺] = 0.110g * (1mol /19.01g) = 0.00579moles / 5.6L = 1.03x10⁻³M

[F⁻] = 0.163g * (1mol /19.0g) = 0.00858moles / 5.6L = 1.53x10⁻³M

[HF] = 1.62g * (1mol /20g) = 0.081moles / 5.6L = 0.0145M

Kc = [1.03x10⁻³M] [1.53x10⁻³M] / [0.0145M]

<h3>Kc = 1.09x10⁻⁴</h3>
7 0
3 years ago
Which particle j j Thomson discovered
nikdorinn [45]

Sir Joseph John Thomson OM PRS (18 December 1856 – 30 August 1940) was a British physicist and Nobel Laureate in Physics, credited with the discovery of the electron, the first subatomic particle to be discovered.

5 0
3 years ago
Read 2 more answers
True or False: Dishwashing liquid cleans dirty plates because the nonpolar tail of the detergent dissolves the oily dirt particl
Ghella [55]

Answer:

true

Explanation:

sorry if wrong I hope it right

3 0
2 years ago
Hypochlorous acid is formed in situ by reaction of aq. sodium hypochlorite solution with acetic acid. Draw balanced chemical equ
vlada-n [284]

Answer:

NaClO + CH₃COOH ----> HClO + CH3CO- + Na

Explanation:

This reaction occurs between the combination of a salt and an acid, that is, an oxide-reduction reaction

4 0
3 years ago
Which expression is equal to the number of grams in 2.43 kilograms
KiRa [710]
1 kg = 1000g
2.43 kg *1000g/1kg = 2430 g
3 0
3 years ago
Other questions:
  • What is the biological significance of the temperature at which the amylase catalyzed reaction
    7·1 answer
  • Compute 214.056 + 9.3456. Round the answer appropriately
    12·1 answer
  • Why does summer receive more daylight hours than winter
    11·2 answers
  • I really need help with this before 5:10
    13·1 answer
  • Electron configurations are a shorthand form of an orbital diagram, describing which orbitals are occupied for a given element.
    11·2 answers
  • Concept 1.2 Energy for Launch
    6·1 answer
  • Can y’all help me with this question How many atoms are found in the chemical formula below Al2( SiO3)2
    11·1 answer
  • How often does the tip of and hour hand on a clock have the same velocity?
    5·1 answer
  • Coal is a very useful rock that formed over millions of years from the remains of plants. Is coal a mineral?
    12·2 answers
  • why do you use a graduated cylinder to measure out the desired volume of koh and h2so4, rather than a pipet or a buret?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!