What volume is occupied by 18.4 g oxygen at 28.0°C and a pressure of 0.998 torr? (round to sig figs)
Answers
Answer:
11.0 dm³
Explanation:
From the question,
Applying
PV= nRT............... Equation 1
Where P = pressure of oxygen gas, V = volume of oxygen gas, n = number of moles of oxygen, R = molar constant, T = Temperature.
make V the subeject of the equation
V = nRT/P............. Equation 2
But,
Number of mole (n) = Mass of oxygen(m)/Molar mass of oxygen(m')
n = m/m'....................... Equation 3
Substitute equation 3 into equation 2
V = mRT/Pm'............. Equation 4
Given: T = 28°C = (28+273) = 301 K, P = 0.998 torr = (0.998×0.00131579) = 1.3132 atm, m = 18.4 g
Constant: R = 0.082 atm.dm³/K.mol, m' = 32 g/mol.
Substitute these values into equation 4
V = (301×18.4×0.082)/(32×1.3132)
V = 454.1488/42.0224
V = 10.81 dm³
V = 11.0 dm³
Related Questions
Write the atomic symbols for isotopes with the following characteristics? 1)an oxygen atom with 10 neutrons 2)a neon atom with twelve neutrons 3)25 electrons and 28 neutrons 4)a mass number of 24 and 13 neutrons 5)a titanium atom with 25 neutrons
A sample of hydrogen gas is collected over water at 25°C. The vapor pressure of water at 25°C is 23.8 mmHg. If the total pressure is 523.8 mmHg, what is the partial pressure of the hydrogen?
The study of all chemicals containing carbon1. Applied Chemistry 2. Bio Chemistry 3. Organic Chemistry 4. Inorganic Chemistry
Nuclei with ______ numbers of neutrons and protons are more stable.
40
20Ca
Answers
In AZX notation
A - Represents the mass number of atom.
Mass number = number ofprotons + number of neutrons.
It is shown atthe above of the left side of theatom.
Here it is 42.
Z - Represents the atomic number.
Atomic number = number of protons.
It is shown at the bottom line of the left side of the atom.
Here it is 20.
X - Represents the symbol of the atom.
Here X is Ca.
The symbol for an isotope of Calcium-42 corresponding to the isotope notation is
Isotopes are atoms of the same element that have the same number of protons (atomic number) but different numbers of neutrons (mass number).
In case of Calcium-42,
- The chemical symbol for calcium (X) is Ca.
- The mass number (A) of the isotope is 42, which is the sum of the number of protons and neutrons in the nucleus of the atom.
- The atomic number (Z) of calcium is 20, which is the number of protons in the nucleus of the atom.
Therefore, the chemical symbol for the isotope Calcium-42 is
Learn more about isotopes here:
#SPJ6
Answers
Answer:
The answer to your question is 2 moles of Carbon
Explanation:
Carbon-12 means it has a molecular mass of 12g / mol. Mol is defined as the number of grams of an atom in one mol.
To solve this problem, we use proportions
12 g of Carbon ---------------- 1 mol of Carbon
24 g of Carbon -------------- x
x = ( 24 g x 1 mol ) / 12 g
x = 24 / 12
x = 2 mol of Carbon
Answer:
2 moles
Explanation:
just took the test :D
have a miraculous day!!! <3
Answers
30 +273 = 303 K
P₁* V₁ / T₁ = P₂*V₂/ T₂
1.00 * 50.0 = 1 * V₂ / 273
V₂ = 1.00 * 50.0 * 273 / 303 * 1 = V₂
V₂ =13650 / 303
V₂ = 45.0 L
hope this helps!
Answers
Answer: False
Explanation:
Metal oxides that dissolve in water, react with water to form basic solutions.
Nonmetal oxides react with water to form acidic solutions.
Final answer:
False. The nature of the solution actually depends on the type of metal oxide. Not all metal oxides will make water acidic when mixed.
Explanation:
The statement that mixing metal oxide with water will result in an acidic solution is generally false.
Actually, the nature of the solution (acidic, basic, or neutral) after mixing metal oxide with water depends on the type of metal oxide. Some metal oxides, particularly those of alkali metals and alkaline earth metals (Group 1 and 2 in the Periodic Table), form basic solutions when dissolved in water. For instance, sodium oxide or magnesium oxide will react with water to form their respective hydroxides, which are basic in nature.
However, certain metal oxides like aluminum oxide or zinc oxide may react with water to form amphoteric solutions (can behave as both acids and bases).
Thus, not all metal oxides will make the water acidic when mixed.
Learn more about Metal Oxides and Water here:
#SPJ11
(3) The first ionization energy decreases and the electronegativity increases.
(4) The first ionization energy increases and the electronegativity decreases.
Answers
Reason:
As we move from top to bottom in a periodic table, atomic radius increases. Also, effective nuclear charge decreases. Due to this, energy required to remove the electron form valance shell decreases. Hence, ionization energy decreases from top to bottom.
In addition to this, metallic character increases from top to bottom. Metals have low electronegativity as compared to non-metals. Hence, electronegativilty value decreases from top to bottom.
The correct statement regarding the first ionization energy and electronegativity values in group 15 is as follows:
Further Explanation:
The amount of energy needed for the removal of the most loosely bound electron from a neutral isolated gaseous atom is termed as ionization energy, represented by IE. It depends on the ease of electron removal from the neutral atoms. If the electrons are removed easily, ionization energy will be less and vice-versa.
Ionization energy is called the first ionization energy when the first electron is removed from the atom. It is shown by . Similarly, if the second electron is removed, ionization energy becomes the second ionization energy
.
The tendency of any element for electron attraction towards itself in a chemical bond is known as electronegativity. More the attracting tendency of the atom for electron, higher will be its electronegativity and vice-versa.
Atomic number and number of shells increase while going down group 15. Due to this, atomic size increases in the group from top to bottom. This increase in size results in weaker attractions between the outermost electrons and the atomic nucleus. So electrons are removed easily and therefore the first ionization energy decreases down this group.
Since atomic size increases from top to bottom of group 15, the attraction between the atomic nucleus and the electrons decreases. Therefore electronegativity also decreases down this group.
Therefore both the first ionization energy and electronegativity decrease down group 15.
Learn more:
- Rank the elements according to first ionization energy: brainly.com/question/1550767
- Arrange the following elements from greatest to least tendency to accept an electron: brainly.com/question/2107660
Answer details:
Grade: Senior School
Chapter: Periodic classification of elements
Subject: Chemistry
Keywords: ionization energy, first ionization energy, electronegativity, attraction, group 15, decrease.
Water droplets begin to fall back to Earth from clouds.
B
Water vapor transfers back to water droplets or ice crystals.
Small particles form and bump into each other to form clouds.
D
The sun turns water into water vapor as it heats Earth's surface.
Answers
Answer:
B. Water vapor transfers back to water droplets or ice crystals.
Explanation:
Its What I know ehe sorry in advance if its wrong :))