Answer:
To solve this problem, we can use the equation for the ideal gas law:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
First, we need to find the total number of moles of gas in the bottle. We know that the bottle contains 0.270 mol of N2, and we can find the number of moles of CO2 by using the partial pressure and the total pressure:
P(CO2) / P(total) = n(CO2) / n(total)
0.250 atm / 4.90 atm = n(CO2) / n(total)
n(CO2) = 0.0128 mol
The total number of moles is then:
n(total) = n(O2) + n(N2) + n(CO2) = n(N2) + n(CO2) + n(O2) = 0.270 mol + 0.0128 mol + n(O2)
n(total) = 0.2828 mol + n(O2)
Next, we can use the ideal gas law to find the number of moles of O2:
PV = nRT
n(O2) = PV / RT
We can rearrange this equation to solve for P(O2):
P(O2) = n(O2)RT / V
We know that R = 0.08206 L·atm/mol·K and T = 273 K. We also know that P(total) = 4.90 atm, and we can find the volume of the bottle by using the given information that it contains 3.00 L:
n(O2) = P(O2) V / RT
0.2828 mol + n(O2) = P(O2) (3.00 L) / (0.08206 L·atm/mol·K) (273 K)
0.2828 mol + n(O2) = 35.75 P(O2)
We can use the information that the partial pressure of CO2 is 0.250 atm to find the partial pressure of N2:
P(N2) = P(total) - P(O2) - P(CO2) = 4.90 atm - P(O2) - 0.250 atm
P(N2) = 4.65 atm - P(O2)
Finally, we can use the fact that the total pressure is the sum of the partial pressures to find P(O2):
P(total) = P(O2) + P(N2) + P(CO2)
4.90 atm = P(O2) + (4.65 atm - P(O2)) + 0.250 atm
4.90 atm = 4.90 atm
Solving for P(O2), we get:
P(O2) = 0.990 atm
Therefore, the partial pressure of O2 is 0.990 atm.
Answer the following:
IV. a. C₂H₂
b. C₂H₄
V. a. C₅H₄
b. C₆H₆
VI.
a. Reactants: Na₂SO₄(aq) + Ca(NO₃)₂(aq) Products: CaSO₄(s) + 2NaNO₃(aq). Type of reaction: Double displacement or precipitation reaction.
b. Reactants: Mg(s) + N₂(g) Products: Mg₃N₂(s). Type of reaction: Synthesis reaction.
VII.
a. 2Hg(NO₃)₂(s) → 2Hg(l) + 2NO₂(g) + O₂(g)
b. Ca₃(PO₄)2(aq) + 6H₃PO₄(aq) → 3Ca(H₃PO₄)₂(aq)
c. 3NaOH(aq) + FeCl₃(aq) → Fe(OH)₃(s) + 3NaCl(aq)
What is the chemical equation about?In part IV, we were asked to write the molecular formula of given compounds based on the given elemental components. For example, acetylene is composed of 2 carbon atoms and 2 hydrogen atoms, so its molecular formula is C₂H₂. Similarly, ethylene has 2 carbon atoms and 4 hydrogen atoms, so its molecular formula is C₂H₄.
Lastly, In part VII, we were asked to balance given chemical reactions. Balancing a chemical equation involves adjusting the coefficients in front of the reactants and products to ensure that the number of atoms of each element is equal on both sides of the equation. For example, in the reaction where solid mercury (II) nitrate is heated to produce liquid mercury, nitrogen gas, and oxygen gas, the balanced equation is 2Hg(NO₃)₂(s) → 2Hg(l) + 2NO₂(g) + O₂(g). Also, we can balance the other two equations given in part VII by adjusting the coefficients.
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2. When administering an oral liquid to a patient what PPE is required?
Single chemo-therapy gloves
Double chemo-therapy gloves
Protective gown
Respiratory protection
Double chemo-therapy gloves and Protective gown
Answer:
Among the options you provided, the correct answer would be Double chemo-therapy gloves and Protective gown, as administering oral liquid to a patient carries a risk of splashing or splattering, and healthcare workers may want to avoid any contact with the patient's body fluids or the medication. However, it is important to note that this may depend on the specific policies and regulations in the healthcare setting, and healthcare workers should always follow the appropriate protocols and guidelines. Respiratory protection is not typically necessary for administering oral liquid. Single chemo-therapy gloves may be used for standard precautions, but the use of double gloves may provide additional protection.
Explanation:
URGENT (will give brainliest)
The overall energy change for the combustion of one mole of methane according to given chemical equation is 2648 kJ/mole.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The combustion involves reactants that is 413×4 +498×2=2648 kJ.
Thus, overall energy change for the combustion of one mole of methane according to given chemical equation is 2648 kJ/mole.
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Which is made by weathering?
Question 5 options:
sediments
ash
magma
minerals
Answer: sediments
Explanation: Weathering of volcanic ash and pumice is unique regarding minerals formed and mineral formation. These minerals include allophane, imogolite, opaline silica, and some halloysites, and have distinctive structures and properties. Mar 10, 1987
Erosion and weathering transform boulders and even mountains into sediments, such as sand or mud. A dissolution is a form of weathering—chemical weathering. With this process, water that is slightly acidic slowly wears away the stone. These three processes create the raw materials for new, sedimentary rocks.
If a solid dissolves in a liquid. Sedimentation and decantation method cannot be used. Why?
Explanation:
Sedimentation and decantation are separation techniques that rely on the differences in densities of the solid and liquid components. In the case of a solid dissolving in a liquid, the solid particles become uniformly dispersed throughout the liquid, forming a homogeneous mixture.
Since the solid particles are not settling down due to gravity and instead are evenly distributed throughout the liquid, sedimentation cannot be used to separate the solid from the liquid. Similarly, decantation, which involves pouring off the liquid while leaving the settled solid behind, is not applicable because there is no settled solid.
To separate a dissolved solid from a liquid, other separation techniques such as filtration or evaporation may be used. Filtration involves passing the mixture through a filter medium that retains the solid particles while allowing the liquid to pass through. Evaporation involves heating the mixture to vaporize the liquid component, leaving the solid behind.
Which statement is completely accurate?
Responses
Atoms of the same element always have different atomic weights.
Atoms of the same element always have different atomic weights.
Atoms of the same element can have neutrons but exist without protons.
Atoms of the same element can have neutrons but exist without protons.
Atoms of the same element always have different numbers of neutrons.
Atoms of the same element always have different numbers of neutrons.
Atoms of the same element can have different numbers of neutrons.
Answer:
Atoms of the same element can have different numbers of neutrons.
Explanation:
This statement is true because atoms of the same element have the same number of protons, which determines the element's atomic number. However, they can have different numbers of neutrons, which gives rise to different isotopes of that element. These isotopes have the same number of protons, but different numbers of neutrons, leading to different atomic weights. So, while the number of protons is fixed for a particular element, the number of neutrons can vary.