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
Irina-Kira [14]
3 years ago
9

WORTH 100 POINTS PLEASE HURRY!!!!!!!!

Chemistry
2 answers:
neonofarm [45]3 years ago
5 0

Answer:

The answer is B

Explanation:

Less air means less air pressure. At a certain point, there is very little air pressure to push against the outward pressure of the helium inside the balloon. It will then expand until the rubber breaks, and the balloon bursts

Anastasy [175]3 years ago
4 0
The answer is actual b
Explanation
It is what is isssssss
You might be interested in
The molar heat of vaporization of water is 40.7kJ/mol. How much heat must be absorbed to convert 50.0 grams of liquid water at 1
EleoNora [17]
During a phase change the temperature does not change since all of the heat is being absorbed in order to break the intermolecular forces.  Due to that, the formula will not need to have T in it and is actually q=nΔH(v).
n=the number of moles (in this case 2.778mol of water since you divide 50g by 18g/mol).
ΔH(v)=the molar heat of vaporization (in this case 40.7kJ/mol).
q=the heat that must be absorbed
q=2.778mol×40.7kJ/mol
q=113.1kJ
Therefore the water needs to absorb 1.13×10²kJ.

I hope this helps.  Let me know if anything is unclear.

4 0
3 years ago
I need help with the blanks
Damm [24]

Answer:

photo is blurred plese send photo clearly

3 0
2 years ago
Part 1: Name the type of chemical reaction that occurs when calcium hydroxide (Ca(OH)2) reacts with nitric acid (HNO3).
liberstina [14]

<u>Answer:</u>

<u>For 1:</u> Neutralization reaction

<u>For 2: </u>Zinc is more reactive than lead and less reactive than calcium.

<u>Explanation:</u>

  • <u>For (1):</u>

When a base reacts with an acid to form a salt and water molecule, it is known as a neutralization reaction. The general equation follows:

HX+BOH\rightarrow BX+H_2O

The chemical equation for the reaction of calcium hydroxide and nitric acid follows:

Ca(OH)_2(aq)+2HNO_3(aq)\rightarrow Ca(NO_3)_2(aq)+2H_2O(l)

  • <u>For (2):</u>

A single displacement reaction is defined as the reaction in which a more reactive metal displaces a less reactive metal from its salt solution. The general chemical equation follows:

A+BX\rightarrow AX+B

where,

Metal A is more reactive than metal B

The reactivity of metals is judged by the reactivity series where a metal lying above in the series is more reactive than the metal lying below it.

From the reactivity series below,

Zinc lies above in the series than lead thus is more reactive and will easily replace lead from its aqueous solution.

While zinc lies below in the series than calcium thus is less reactive and will not easily replace calcium from its aqueous solution.

Zn(s)+Pb(NO_3)_2(aq)\rightarrow Zn(NO_3)_2(aq)+Pb(s)

Zn(s)+CaCl_2(aq)\rightarrow \text{No reaction}

5 0
3 years ago
What is the chemical formula for methane?
aleksandr82 [10.1K]
The chemical formula for methane is CH4

6 0
3 years ago
A commercial airplane typically flies at a height of 37,000 feet. If an average cell phone was dropped from an airplane, about h
saul85 [17]

Answer:

its b i just did it .

6 0
2 years ago
Read 2 more answers
Other questions:
  • Using the Law of Conservation of Matter, determine the number of grams of iron sulfide (FeS) that will be produced in this react
    7·2 answers
  • Naturally occuring boron is 80.20% boron-11 (atomic mass 11.01 amu) and 19.80% of some other isotope. What must the atomic mass
    8·1 answer
  • Which factors would negatively impact the bodies digestive system
    6·1 answer
  • Which of the following statements is true with regard to transverse and longitudinal waves?
    15·2 answers
  • Plz help with number 4
    6·1 answer
  • How does the matter and (solar) energy move through the sphere? (Atmosphere)
    14·1 answer
  • The pH scale from 7 to 14 is for a(n) What .
    5·1 answer
  • Help plz 39 points!!!!!!
    15·2 answers
  • Write the net ionic equation for the reaction that takes places between aqueous copper and nitrate.
    7·1 answer
  • 2. Show the molecular formula and electron structure of the simplest compound that forms with only carbon and hydrogen atoms. (1
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!