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
masha68 [24]
2 years ago
6

14. A gas in a 400 ml flask exerts pressure of 81.0 kPa at 25.0°C. If the gas

Chemistry
1 answer:
sammy [17]2 years ago
7 0

Answer: B would be the correct answer

Explanation: You will need to use P1V1/T1=P2V2/T2

So

P1= 81.0kPa /101 =0.799atm

V1=0.4L

T1=25.0C +273.15K= 298.15K

P2= 101kPa /101 = 1atm

V2=0.25L

T2= ?

T2=P2V2T1/P1V1

(1.0atm)(0.25L)(298.15K)/(0.799atm)(0.4L) =233.22K-273.15=-39.92C

You might be interested in
What is unique about the size and location of this exoplanet?
swat32

Answer:

It is the smallest planet found in the habitable zone.

Explanation:

3 0
3 years ago
What is the one variable that is changed in the experimental group called? the placebo the independent variable the control grou
BlackZzzverrR [31]

Answer:

the independant variable

Explanation:

4 0
3 years ago
Alchemists were medieval scholars and philosophers who were the forerunners of modern-day chemists. many tried repeatedly to tra
AlladinOne [14]

Answer is: because they were using simple chemical reactions to transform elements, but that is possible only with nuclear reactions, which in that time were not possible to conduct.

Nuclear reactions can produce new elements, because number of protons and neutrons is changed, lead and gold have different atomic and mass numbers.

The electrons of an atom participates in a chemical reaction, chemical reactions involve the rearrangement of electrons, because there is transfer, loss, gain and sharing of electrons in chemical reactions, new elements are not formed.


8 0
2 years ago
How many grams are in 1.946 moles of nacl
Ilia_Sergeevich [38]

Answer:

113.8g

Explanation:

Statement of problem: mass of 1.946mole of NaCl

Given parameters:

Number of moles of NaCl = 1.946mole

Unknown: mass of NaCl

Solution

To find the mass of NaCl, we apply the concept of moles which expresses the relationship between number of moles and mass according to the equation below:

                        Number of moles = \frac{mass}{molar mass}

To find the molar mass of NaCl:

                         the atomic mass of Na = 23g

                                atomic mass of Cl = 35.5g

                Molar mass of NaCl = (23 + 35.5) = 58.5gmol⁻¹

Mass of NaCl = Number of moles x molar mass of NaCl

Mass of NaCl = 1.946 x 58.5 = 113.8g

7 0
3 years ago
What gas is measured in an ICE CORE and what is the correlation between that gas and temperature?
PSYCHO15rus [73]

Answer:

Explanation By looking at past concentrations of greenhouse gasses in layers in ice cores, scientists can calculate how modern amounts of carbon dioxide and methane compare to those of the past, and, essentially, compare past concentrations of greenhouse gasses to temperature. Ice coring has been around since the 1950s.n:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Consider the following numbered processes: 1. A → 2B 2. B → C + D 3. E → 2D ΔH for the process A → 2C + E is
    12·1 answer
  • A girl throws a rock into a pond. A leaf floating on the pond bobs up and down but does not change location on the pond's surfac
    14·1 answer
  • Write to explain trenus un pr
    15·1 answer
  • Another metal phosphate is cobalt phosphate. It will behave similar to calcium phosphate in an acid solution. What is the net io
    5·2 answers
  • In an isotope, which subatomic particle varies in number ?
    11·1 answer
  • Assign oxidation numbers to the element in each of the following compounds. Remember an oxidation number is for one atom of the
    13·1 answer
  • To make 4.25 L of 3.0 M NaOH solution how much of a 9.0 M NaOH solution would be needed?
    11·1 answer
  • Match the following family of elements to its group.
    8·1 answer
  • Calculate 5.1234 + 0.033÷ 1.650 and report to the correct number of significant figures.
    8·1 answer
  • Lewis dot structure of PSI3 with minimized formal charges
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!