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
rewona [7]
3 years ago
6

PLEASE HELP ME!!!!!

Chemistry
2 answers:
ANTONII [103]3 years ago
8 0

According to Boyle's law:

Pressure of given mass of ideal gas is inversely proportional to its volume at a constant temperature.

That can be represented as:

PV=Constant

Where P represents pressure, V represents volume.

Here as the volume increases that is from 20 L to 27 L, So pressure must decreases, so the original pressure must be greater than 120 kPa.

So the answer is "The original pressure must be more than 120kPa because when P increases, V decreases".

Oxana [17]3 years ago
3 0
The second one is correct im pretty sure
You might be interested in
Prepare a project report on various samples of
san4es73 [151]
<h2>Project Reports</h2>

<h3>A) Mixture</h3>

This refers to the material that is made when different substances mix up physically and causes a reaction.

You can make on the project of Mixture -

  • 1) Alloys
  • 2)Colloids
  • 3) Suspension
  • 4) Solution

<h3>B) Compound</h3>

This refers to the chemical bond that holds different atoms tightly

You can make on the project of Compound -

  • 1)Water
  • 2)Methane
  • 3)Carbon Dioxide
  • 4) Sulfuric Acid

<h3>C) Elements</h3>

Based on the fact that the atom is the smallest indivisible part of an element, elements like phosphorous cannot be further broken down.

You can make on the project of Elements -

  • 1) Mercury
  • 2) Iron
  • 3) Copper
  • 4)Carbon

Read more about mixtures and compounds here:

brainly.com/question/491220

#SPJ1

8 0
1 year ago
Calculate the mole fraction of each component in a solution with 6.87 g of sodium chloride (NaCl) dissolved in 65.2 g of water.
zheka24 [161]

Answer:

mole fraction of NaCl = 0.03145.

mole fraction of water = 0.9686.

Explanation:

  • Mole fraction is an expression of the concentration of a solution or mixture.
  • It is equal to the moles of one component divided by the total moles in the solution or mixture.
  • The summation of mole fraction of all mixture components = 1.

mole fraction of NaCl = (no. of moles of NaCl) / (total no. of moles).

<em>no. of moles of NaCl = mass/molar mass </em>= (6.87 g)/(58.44 g/mol) = 0.1176 mol.

<em>no. of moles of water = mass/molar mass</em> = (65.2 g)/(18.0 g/mol) = <em>3.622 mol.</em>

<em></em>

∴ mole fraction of NaCl = (no. of moles of NaCl) / (total no. of moles) = (0.1176 mol)/(0.1176 mol + 3.622 mol) = 0.03145.

<em>∵ mole fraction of NaCl + mole fraction of water = 1.0.</em>

∴ mole fraction of water = 1.0 - mole fraction of NaCl = 1.0 - 0.03145 = 0.9686.

7 0
3 years ago
What is the total number of protons in an h2o atom?
NISA [10]
The atomic number of H2O is 18 hence it contains 18 protons. Hope this helps.
5 0
3 years ago
What carries information to the brain?
Vika [28.1K]
I believe the medulla is the answer.
3 0
2 years ago
Read 2 more answers
How many oxygen molecules are needed to make 10 carbon dioxide molecules according to the following balanced chemical equation?
11Alexandr11 [23.1K]
<h2 /><h2 /><h2>answer.</h2>

five oxygen molecules

step by step explanation.

according to the equation,one molecule of oxygen is enough to react with two carbon molecules thus 10 carbon molecules need 5oxygen molecules

6 0
3 years ago
Other questions:
  • A student made the Lewis dot diagram of a compound as shown.
    11·2 answers
  • All living things use energy. This is why living things must eat to continue living. Which of the following demonstrates a way i
    5·1 answer
  • What are two household appliances that use an electric motor? What does the motor make happen in each appliance.
    9·2 answers
  • True or false: Tectonic Plates move quickly so it is difficult to notice.
    8·1 answer
  • What are some or the characteristics of Wisconsin fast plants and zebra fish that make them ideal for use as model organisms?
    13·1 answer
  • Which of the following systems in not directly involved in the body's regulation of water?
    9·1 answer
  • Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm Ar, and 0.15 atm He. W
    10·1 answer
  • A 30. mL sample of distilled water at 10ºC is added to a 50. mL sample of the same water at 50ºC in a coffee-cup calorimeter. Th
    5·1 answer
  • Spring and autumn both have a certain day where the amount of daytime hours
    15·1 answer
  • Help me out ? I'm not sure of my answer.<br>​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!