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
Ratling [72]
3 years ago
8

Determine the volume occupied by 2.5 mol of a gas at 18 °C if the pressure is 81.8 kPa?

Chemistry
1 answer:
mars1129 [50]3 years ago
3 0

Answer:

74 litre

Explanation:

using ideal gas eqation PV=nRT

here P(pressure)=81.8 kPa =81.8×10^3 Pa

moles=2.5

temperature=273.15+18=291.15K

Gas constant R=8.314m^3-Pa/K-mol

now, V=nRT/P = 8.314×2.5×291.5/81.8×10^3 ≈74litre

✌️;)

You might be interested in
What is true for a substance that releases energy
hammer [34]

The sun is a true substance that gives off energy.

6 0
3 years ago
We are trying to build a good model of the _____________ that are happening on the tectonic plates under us.
Arturiano [62]

Answer:

scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years.

Explanation:

i'm in the 7th grade

8 0
3 years ago
Though alchemists were often superstitious, they left a rich legacy for modern chemists. What was their main contribution?
topjm [15]

though alchemists were often superstitious, they left a rich legacy of modern chemists. what was their main contribution-

Explanation:

they were the first to preform experiments.

5 0
3 years ago
In going across a row of the periodic table, protons and electrons are added and ionization energy generally increases. In going
RoseWind [281]

Answer:

Explanation:

Ionization energy:

It is the minimum amount of energy required to remove the electron from isolated gaseous atom to make the ion.

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell.

When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.  Where as,

When we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

As the size of atom increases the ionization energy from top to bottom also  decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.

4 0
3 years ago
Which statement about the organisms whose fossils are found in the rock is correct?
o-na [289]

Answer:

a?

Explanation:cause if organism w is a fossil and organism y is a rock the rock is way older than a fossil so a

7 0
2 years ago
Other questions:
  • Summarize how the solar system was devolved and what keeps it in place today
    11·1 answer
  • What are fragments of dust, soil, salt, smoke and ash upon which water vapor condenses to make clouds
    15·2 answers
  • Which of the following states that an orbital can obtain two electrons only if all other orbitals at that sublevel contain at le
    6·1 answer
  • What are the products of this chemical equation? HCl(aq) + NaOH(aq) → NaCl(aq) + H2(g) + O2(g) NaH(aq) + Cl2(aq) + H2(g) + O2(g)
    11·2 answers
  • What is the boiling point of a solution that contains 3 moles of KBr in 2000 g of water? (Kb = 0.512 C/m)
    6·1 answer
  • Calculate these volumes.
    9·2 answers
  • 16.78 A buffer is prepared by mixing 525 mL of 0.50 M formic acid, HCHO2, and 475 mL of 0.50 M sodium for- mate, NaCHO2. Calcula
    11·1 answer
  • A bird building a nest for its young is a reproductive strategy. Based on this example, what do you think the term “reproductive
    6·2 answers
  • Oil and fat containing food items are flushed with nitrogen. Why?
    12·2 answers
  • According to the CDC, influenza is a respiratory illness caused by the flu virus. Some of the symptoms include cough, sore throa
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!