When 8.00 × 1022 molecules of ammonia react with 7.00 × 1022 molecules of oxygen according to the chemical equation shown below, how many grams of nitrogen gas are produced?4 NH3(g) + 3 O2(g) → 2 N2(g) + 6 H2O(g)
Answers
Answer: 1.848 g
Explanation: To calculate the moles, we use the equation:
....(1)
For ammonia:
Putting values in above equation, we get:
For the reaction:
By Stoichiometry of the reaction,
4 moles of ammonia combine with 3 moles of Oxygen
Thus 0.132 moles of ammonia will combine with= of oxygen
Thus ammonia is the limiting reagent as it limits the formation of product.
4 moles of ammonia produces 2 moles of nitrogen
0.132 moles of ammonia will produce= of nitrogen
Molar mass of nitrogen = 28 g/mol
Amount of nitrogen produced=
Final answer:
In the given chemical reaction, 8.00 x 10²² molecules of ammonia would produce 37.3 grams of nitrogen gas.
Explanation:
In this chemical reaction, every 4 molecules of ammonia (NH₃) produce 2 molecules of nitrogen gas (N₂). Given you have 8.00 x 10²² molecules of ammonia, this would produce (8.00 x 10²² / 2) x 2 = 8.00 x 10²² molecules of nitrogen gas, according to the reaction stoichiometry.
One molecule of nitrogen gas (N₂) has a molar mass of 28 g/mol. To convert molecules to moles, we need Avogadro's number (6.022 x 10²³ molecules = 1 mol). So, the number of moles of nitrogen gas is (8.00 x 10²² molecules / 6.022 x 10²³ molecules/mol) = 1.33 mole.
Now, by using the molar mass of nitrogen gas, we can find the mass. So, the mass of nitrogen gas = molar mass x moles = 28 g/mol x 1.33 mol = 37.3 grams.
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The process of ionic bonding is not the same as the process of metallic bonding. Which of the following statements is trueabout these processes?1. In ionic bonding, only ions of the same element combine to form a compound.2. In metallic bonding, valence electrons can move freely between atoms.3. Substances formed through ionic bonding are not considered compounds.4. In metallic bonding, electrons are transferred between elements in fixed ratios.
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Answers
Answer:
The atomic mass is the weighted average of all the naturally occurring isotopes of the element.
Explanation:
A. The atomic mass is the weighted average of all the naturally occurring isotopes of the element. YES. Since there can be several different isotopes of the same element, the weighted average is used in the periodic table to reflect the likely composition of a random sample.
B. The atomic mass is determined by the number of protons in the nucleus. NO
C. The atomic mass is a whole number, but it appears as a fraction due to rounding in the periodic table. NO.
D. The atomic mass is a decimal number because it represents the total number of electrons in the atom. NO.
A molecule always has three types of elements present
b.
Compounds always include the elements hydrogen and sodium
c.
Compounds include things we use in our everyday lives
d.
All elements prefer to hang out with other elements and form molecules
Answers
The true statement among the following options is c. As the substances which we use are compounds.
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.
Compounds include things we use in our everyday lives.Compounds are substances composed of two or more different elements chemically combined in a fixed ratio by weight. They are everywhere in our daily life, from food to electronics. For example, table salt is a compound that we use to enhance the flavor of our food.
Thus, the correct option is C.
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Answers
Final answer:
Protons and neutrons are found in the nucleus of an atom while electrons are found in orbitals surrounding the nucleus. The number of protons determines the type of element the atom is.
Explanation:
In an atom, protons and neutrons are located in the nucleus, which is the central part of the atom. The electrons on the other hand, are situated in the areas around the nucleus called electron shells or orbits. Protons carry a positive charge, neutrons are neutral, and electrons carry a negative charge. The number of protons in an atom is what determines the atomic number and thus, the type of element it is.
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A) markings on the gun's exterior
B) markings on the casing
C) markings on the bullet
D) powder residues
Answers
One that is can associate a suspect and the firing of a gun is powder residues. The correct option is D.
What is gun power residue?
GSR is made up of unburned or partially burned gunpowder particles, soot, nitrates, and nitrites from powder combustion, primer particles (oxides of lead, antimony, and barium), and bullet or bullet jacket particles that are vaporized when a firearm is discharged.
Gunshotresidue (GSR) is a speck of vital trace evidence that assists forensic scientists in solving a wide range of firearm-related incidents.
The identification of the shooter, as well as bullet identification from a gunshot wound, aid in the reconstruction of a crime scene.
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Thus, the correct option is D.
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sodium, nickel, carbon, or oxygen
Answers
Answer : Option A) Sodium
Explanation : Sodium is the element which is most reactive tin the given options.
Sodium has the atomic number as 11, which is distributed in the atomic shells as 2-8-1.
So, it is clear that the outermost valence shell contains only one electron in sodium. To give away one electron and attain the octet state is easy for sodium. If it donates the electron it becomes a cation which is very reactive, as it gets a positive charge on itself.
Compared to the valency of the other atoms given here, Nickel has 2 valence electrons so it will be less reactive than Sodium.
Carbon has 4 valence electrons which is less than sodium and oxygen needs 2 electrons to be an octet which is also less.