Answer:
d = 0.793 g/L
Explanation:
Given data:
Density of fluorine gas = ?
Pressure of gas = 0.554 atm
Temperature of gas = 50 °C (50+273.15K = 323.15 K)
Solution:
Formula:
PM = dRT
M = molar mass of gas
P = pressure
R = general gas constant
T = temperature
d = PM/RT
d = 0.554 atm × 37.99 g/mol / 0.0821 atm.L /mol.K × 323.15 K
d = 21.05 atm.g/mol/26.53 atm.L /mol
d = 0.793 g/L
Which material has been recycled for over 3,000 years?
A. metal
B. glass
C. paper
D. cloth
Answer:
B. glass
Explanation:
I did research about the topic.
1.
What part of the human body is the wing most like? ANSWER
Help
What part of the human body is most likely the wing would proabably from your elbow joint and the rest of your arm but most likely it would be the elbow joint.
What layer is made of metals and is a solid?
A.Mesosphere
B.inner core
C.outer core
Answer:
B Inner core because it has metals and solids
What would happen to the entropy in the reaction 2O^3(9) ► 3O^2 (g)?
O A. It decreases.
O B. It increases
O c. It stays the same.
O D. It is impossible to tell.
What is the mass number of chlorine?
Answer:
Explanation:
35.453 u
15.
A mixture of carbon dioxide and hydrogen gases is maintained in a 9.62 L flask at a pressure of 3.44 atm and a temperature of 63 °C. If the gas mixture contains 12.5 grams of carbon dioxide, the number of grams of hydrogen in the mixture is _____
g.
Answer:
Mass = 1.84 g
Explanation:
Given data:
Total pressure = 3.44 atm
Volume of flask = 9.62 L
Temperature = 63°C = 63+273.15K = 336.15 K
Mass of CO₂ = 12.5 g
Mass of hydrogen = ?
Solution:
Number of moles of CO₂:
Number of moles = mass/molar mass
Number of moles = 12.5 g/ 44 g/mol
Number of moles = 0.28 mol
Pressure of CO₂:
PV = nRT
R = general gas constant = 0.0821 atm.L/mol.K
P = 0.28 mol × 0.0821 atm.L/mol.K × 336.15 K / 9.62 L
P = 7.73 atm.L/ 9.62 L
P = 0.8 atm
Total pressure = Partial pressure of CO₂ + Partial pressure of H₂
3.44 atm = 0.8 atm + P(H₂)
P(H₂) = 3.44 atm - 0.8 atm
P(H₂) = 2.64 atm
Number of moles of hydrogen:
PV = nRT
2.64 atm × 9.62 L = n × 0.0821 atm.L/mol.K × 336.15 K
25.39 atm.L = n × 27.59atm.L/mol
n = 25.39 atm.L / 27.59atm.L/mol
n = 0.92 mol
Mass of hydrogen:
Mass = number of moles × molar mass
Mass = 0.92 mol × 2 g/mol
Mass = 1.84 g
Determine the empirical formula of a
compound containing 2.6444g of gold
and 0.476g of chlorine.
Answer:
AuCl
Explanation:
Given parameters:
Mass of Gold = 2.6444g
Mass of Chlorine = 0.476g
Unknown:
Empirical formula = ?
Solution:
Empirical formula is the simplest formula of a compound. Here is the way of determining this formula.
Elements Au Cl
Mass 2.6444 0.476
Molar mass 197 35.5
Number of moles 2.6444/197 0.476/35.5
0.013 0.013
Divide by the
smallest 0.013/0.013 0.013/0.013
1 1
The empirical formula of the compound is AuCl
Which subatomic particle has no electric charge?
1) Electron
2) Neutron
3) Proton
4) Positron
Answer:
neutrons are uncharged and electrons are negatively charged
does a white dwarf have a red shell
Answer:
I have no idea but I'ma guess no
How many molecules are in 2.0 moles of oxygen gas
Answer:
6.02 X 1023 molecules
Explanation:
Explain the following terms Sublimation
Answer:
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... The reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase.
Please help!!
What is most of the atom made of?
Answer:We now know that atoms are made up of three particles: protons, neutrons and electrons — which are composed of even smaller particles, such as quarks. Atoms were created after the Big Bang 13.7 billion years ago.
Explanation:
HELP PLS 50 POINTSSSS
Listed in the Item Bank are some key terms and expressions associated with the categories seen in the Venn Diagram. To find out more
information about items, some have more details available when you click on them. Drag and drop each item onto the proper area of the
diagram. If an item describes more than one category, be sure to place it in the overlapping space.
ITEM BANK: Move to Bottom
Carbon dioxide is a product. Carbon dioxide is a reactant. Carried out in animals.
Carried out in plants
Chemical Reaction
Oxygen is a product
Oxygen is reactant Produces usable energy sourc
Cellular Respiration
Both
Photosynthesis
Answer:
Carbon dioxide is a product (cellular respiration)
Carbon dioxide is a reactant(photosynthesis)
Carried out in animals(cellular respiration)
Carried out in plants(both)
Chemical reaction(cellular respiration)
Oxygen is a product(photosynthesis)
Oxygen is a reactant(cellular respiration)
Produces usable energy source(photosynthesis)
Your welcome!!! Plz mark brainliest.
Answer:attached is the correct answer
Explanation:
Photosynthesis and Respiration
How did Wegener use similar mountain ranges and areas made of certain types of rock found in Africa and South American as evidence that these 2 continents were once connected?
Answer:
the Germany scientist Alfred Wagner describes fold mountains that are found in The world are the same also geological similarity that occur between this continent are the same for example the rock that are found in brazil are the same of that of south africa.
A 3.78 g sample of a blue-colored powder contains 1.52 g of chromium, 0.88 g of sulfur and 1.38 g of oxygen.
What is the Empirical formula of the compound?
Answer:
CrSO₃
Explanation:
Given parameters:
Mass of sample = 3.78g
Mass of chromium = 1.52g
Mass of sulfur = 0.88g
Mass of oxygen = 1.38g
Unknown:
Empirical formula of the compound = ?
Solution:
The empirical formula of a compound is the simplest formula of such a compound.
To solve this problem, follow the chart below:
Elements Cr S O
Mass 1.52 0.88 1.38
Molar mass 52 32 16
Number of moles 1.52/52 0.88/32 1.38/16
0.029 0.028 0.086
Divide through by
the smallest 0.029/0.028 0.028/0.028 0.086/0.028
1 1 3
So,
The empirical formula is CrSO₃
A rectangular block of copper metal has a mass of 1896 grams. The volume of the block is 2cm^3. From this data, what is the density of the copper?(Please show how you got this answer)
What amount if force need to be applied to a 20 kg bowling ball to give it an acceleration of 5m/s
Answer:
100N
Explanation:
Given parameters:
Mass of the bowling ball = 20kg
Acceleration = 5m/s²
Unknown:
Amount of force applied = ?
Solution:
To solve this problem, we apply newton's second law of motion.
Force = mass x acceleration
Now insert the parameters and solve;
Force = 20 x 5 = 100N
What does it mean when there is a coefficient placed before a molecule?
Provide two examples to explain your understanding.
Answer:
Coefficients are used in all chemical equations to show the relative amounts of each substance present. This amount can represent either the relative number of molecules, or the relative number of moles (described below). If no coefficient is shown, a one (1) is assumed.
Explanation:
100 PIONTS!!!! HELLLLPP MEEEE PLEASSSE ITS MY FINALLLLL AND ITS DUE TODAYYYYY
Answer:
The liquid Iodine may bubble as you boil it.
Explanation:
Answer:
i did the test The liquid Iodine may bubble as you boil it.
What function does this cytoplasm perform in a plant and animal cells
Answer:
It helps shape, while holding and keeping organelles in their place.
Explanation:
Answer:
it holds the cell organelles
Explanation:
You are welcome
What is a paleontologist?
Why is it important to know the properties of both solutes and solvents when preparing a solution that is expected to meet a certain need?
Answer:
property referring to the ability for a given substance the solute to dissolve in a solvent
Which element creates an ion who is LARGER in size than the original atom? Rb Rn S Ca
Answer:
The element S creates an ion which is larger in size than the original atom.
Explanation:
The atomic radius of elements is a measure of the size of atoms of elements. The atomic radius is defined as one-half the distance between the nuclei of identical atoms that are bonded together. Atomic radius increases on going down the group in the period table but decreases on going rom left to right across a period in the periodic able. The increase in atomic radius on going down the group is due to the addition of an extra electron shell to successive atoms of elements in a group. However, atomic radius decreases across a period due to increase in the positive charge of the nucleus of elements in the same period.
When atoms of elements form ions, the ionic radius of the resulting ion can either increase or decrease. For positive ions, the ionic radii decreases due to loss of electron increasing the attraction of the positive nucleus or even a complete loss of an electron shell. For anions, ionic radii increases due to gain of electrons which results in greater repulsion among neighboring electrons.
Among the elements given, rubidium (Rb), and calcium (Ca) for cations, hence, their size becomes smaller. Radon, Rn, being a noble gas is relatively inert, but forms positive ions when it does take part in reactions. Sulphur, S, however forms an anion, S²⁻, hence, its size increases.
How has the way humans communicate changed over time?
What are the uses of tritium?
Answer:
biochemical research, animal metabolism studies, and ground water transport measurements.
Explanation:
Many disciplines are involved in environmental science, including chemistry and biology which ___ and economics and political science which __. Multiple choice question.
Answer:
Contribute evidence; help us understand how people use resources.
Explanation:
Environmental science can be defined as an interdisciplinary field of science that comprises of chemistry, economics, engineering, zoology, geography, geology, biology, ecology, physics, etc., used for the study and understanding of various environmental factors, issues in relation to human life.
Many disciplines are involved in environmental science, including chemistry and biology which contribute evidence and economics and political science which help us understand how people use resources in the production of goods and services to meet the need or requirements of consumer. These resources include land, labor, entrepreneurship and capital.
What is a disadvantage of using solar energy?
I didn’t mean to click on a answer but help
Answer:
the cost is high..it uses alot of space...associated with pollution
Is this an element?
Cu20
O Yes, it's made of 1 type of atoms
O No it's made of more than 1 type of atoms
Answer:
Yes, its made of 1 types of atoms
Explanation:
Cu20 is Copper(I) oxide or cuprous oxide
Calculate the volume of hydrogen produced during the electrolysis of dilute sulphuric acid if you use a current of 1A for 15minutes?
Answer:
The volume of hydrogen gas produced is 0.104 L or 104 mL
Explanation:
In the electrolysis of dilute sulphuric acid, hydrogen gas is produced at the cathode while oxygen gas is given off at the anode in a ratio of 2:1.
At the cathode, the half reaction occurring is given as: 4H⁺(aq) + 4e⁻ ---> 2H₂(g)
From the equation of reaction, four moles of electrons are required to produce 2 moles of hydrogen gas at the cathode. Therefore, 2 moles of electrons will produce 1 mole of hydrogen gas.
1 mole of electron = 1 F = 96500 C
2 moles of electron = 193000 C
During the electrolysis experiment above, quantity of charged used, q = current(A) * time (s)
Q = 1 * 15 * 60 = 900 C
193000 C (2 moles of electron)of electricity produces 1 mole of hydrogen gas
900 C of electricity will produce 900 * 1 mole /193000 of hydrogen = 0.00466 moles of hydrogen
Molar volume of a gas at STP = 22.4 L
0.00466 moles of hydrogen occupies a volume of 0.00466 * 22.4 L = 0.104 L or 104 mL
Therefore, volume of hydrogen gas produced is 0.104 L or 104 mL
What is the volume of 0.05 mol of neon gas
Answer:
1.12L
Explanation:
multiply 0.05 ×22.4