When an atom X of an element in Group 1 reacts to become X+
Answers
When an atom X of an element in Group 1 reacts to become X+, number of filled energy levels decreases. The correct option is D.
What are energy levels and how to explain this?An atom's electrons typically fill all of the lowest energy levels first, followed by the higher ones. The electrons are in the lowest energy state possible thanks to this filling order.
Atom X will lose an electron to become atom \(X^{+1}\), since the atom is neutral and the electron is unit negatively charged. While the nonmetal picks up one or more electrons, the metal loses one or more. The amount of electrons lost is a function of the metal's position in the periodic table. Elements in group 1 lose one electron, while those in group 2 lose two. When one electron is lost, a positive charge results because there are more protons than electrons. With the negative charge, the opposite occurs.
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The complete question is:
When an atom X of an element in Group 1 reacts to become X+ -
A mass number of X increases.
B atomic number of X decreases.
C charge of the nucleus increases.
D number of filled energy levels decreases.
Related Questions
Gravitational forces exerted on any two____in the universe
Answers
Answer:-
Gravitational forces exerted on any two bodies in the universe
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What is the relationship between the height of the activation energy barrier and reaction rate?
a. The higher the activation barrier the slower is the reaction
b. The higher the activation barrier the faster is the reaction
c. There’s no relationship between the height of activation barrier and reaction rate
d. Activation barrier is only relevant to reaction rate when a catalyst, such as an enzyme, is involved
Answers
The relationship between the height of the activation energy barrier and reaction rate is a. The higher the activation barrier the slower is the reaction.
The activation energy barrier is the amount of energy that must be overcome for a reaction to occur. The higher the activation energy barrier, the more energy is required for the reaction to take place, and therefore the slower the reaction rate will be. Conversely, the lower the activation energy barrier, the less energy is required for the reaction to take place, and therefore the faster the reaction rate will be.
The relationship between the height of the activation energy barrier and reaction rate is described by the Arrhenius equation, which shows that the rate constant for a reaction is inversely proportional to the activation energy barrier. Therefore, the higher the activation energy barrier, the slower the reaction rate, and the lower the activation energy barrier, the faster the reaction rate.
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What is an example of a hydraulic device?
barber’s chair
levers
wheels
car
Answers
Answer:
car
Explanation:
Cars have hydraulic brake circuit that operates a car's brake's on four wheels.
Answer:
barbers chair
Explanation:
Please try and help me understand what the answer would be and how to get the answer for specifically what is S for silicon tetrachloride, SiCI4?
Answers
Answer
Explanation
In the Lewis Dot structure, S = N - A is used to calculate the total number of shared and unshared electrons in a molecule.
S represents the TOTAL number of valence shared electrons in a molecule to achieve an octet, N represents the sum of the number of valence electrons of all the atoms of the molecule, and A is the number of valence electrons in an electron pot.
For SiCl₄, the valence electron on each atom coming together to form the molecule is:
Valence electron on Si = 4
Valence Electron on Cl = 7
Total valence electron on SiCl₄ = 4 + (4 x 7) = 32
The least electronegative Si atom is placed at the center, and four Cl atoms are connected with a single bond.
A single bond takes up 2 valence electrons, so for four bonds, 8 valence electrons have been occupied, and we are left with 32 - 8 = 24 valence electrons.
Thus, in the Lewis Dot structure S = N - A , the TOTAL number of valence electrons in a molecule to achieve an octet of SiCl₄ to achieve an octet is
A runner travels at a constant speed of 4 m/s. What happens to the velocity of the runner when the runner changes direction?
Answers
Answer:
4m/s in the direction of the turn
Explanation:
The velocity of an object is the rate of change of its position with respect to a frame of reference.
Assuming the runner stays the same speed as he turns, his velocity will be 4m/s in the speed he turns.
true or false: Halogens are very stable because they have a full outer shell of 8
Answers
Answer:
True
Explanation:
Halogens are very stable because they have a full outer shell of 8
true or false?
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It's true!
Which element does the "X" in
the isotope notation
represent?
14X
6
A. C
B. O
C. Si
D. N
Answers
The element whose isotope is represented as \(_{6}^{14}X\) is carbon -14. The atomic number of carbon is 6 and the mass number for the given isotope is 14 amu.
What are isotopes?Isotopes are atoms of same element with different mass numbers. Isotopes slightly changes in chemical and physical properties between each other.
Almost elements in the periodic table are having isotopes. However not all of them are stable. Some of them for heavy metals are radioactive isotopes and are not stable.
The isotope is represented by showing mass number in top of the symbol and atomic number at the bottom. The atomic number 6 corresponds to carbon. Hence, option A is correct. Carbon -14 isotope is given here.
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A hypothetical metal is Body Centered Cubic (BCC with one atom per lattice point) with an atomic mass of 52 and lattice parameter a=0.288 nm. Its mass density is A) 5.86 g/cc B) 14.4 g/cc C) 7.22 g/cc D) 6.39 g/cc Assuming one atom per lattice point, the planar density of {100} planes in a Face Centered Cubic (FCC) crystal structure is A) 59% B) 79% C) 91% D) 83%
Answers
The hypothetical metal is a Body Centered Cubic (BCC) crystal with one atom per lattice point. The atomic mass of the metal is 52, and the lattice parameter (a) is 0.288 nm. The correct answer is option C. 7.22 g/cc and B. 79% .
The mass density (p) can be calculated using the formula p = (m / N_A) * (1 / V_c), where m is the atomic mass, N_A is Avogadro's number, and V_c is the volume of the unit cell. Plugging in the given values, we find that the mass density of the hypothetical metal is 7.22 g/cc. The correct answer is option C. 7.22 g/cc.
Next, we need to determine the planar density of {100} planes in a Face Centered Cubic (FCC) crystal structure.
The {100} plane intersects the x-axis at 1/2 of the edge length of the square face, which is a/2. In an FCC unit cell, there is one {100} plane per unit cell, and the atoms are located only at the corners of the plane.
Thus, the number of atoms per unit cell is 4. The area of the {100} plane is (a/2)². By dividing the number of atoms by the area, we find that the planar density of {100} planes in an FCC crystal structure is 79%.
Therefore, the correct option is (B) 79%.
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Elements in which the d-sublevel is being filled have the properties of
Answers
Answer:
Elements in which the d-sublevel is being filled have the properties of metals
Elements in which the d-sublevel is being filled have the properties of;
transition metals.
In quantum theory the sublevel is an energy level. Now, the d-sublevel in atomic configuration has 5 orbitals and as such can contain a maximum of 10 electrons.
Now, this d-sublevel is used primarily by elements called "transition elements" as they are also called d-block elements.
However, these transition elements are also called transition metals because all the transition elements possess properties of metals generally.
In conclusion, elements in which the d-sublevel is being filled have the properties of transition metals.
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Calculate the cost of gasoline for a 320 mile trip from Boston to New
York City.
Your car averages 20 miles/gal of gas, and
gas costs a bargain $3.58/gallon.
Answers
What does the reducing agent do in a redox reaction? (A.P.E.X)
Answers
Answer:
The reducing agent donates electron to the oxidizing agent and gets oxidized itself
Explanation:
In an oxidation-reduction reaction, also known as REDOX reaction, one of the reactants is called OXIDIZING AGENT while the other is called REDUCING AGENT. The reducing agent is called so because it reduces another substance in the reaction.
It reduces another atom/ion by donating electrons to that atom, hence, getting oxidized itself in the process. For example, in the following reaction:
H2 + F2 → 2HF
Fluorine is getting oxidized from -2 to 0 by donating electrons to H and reducing it from +2 to 0.
Answer:
Reduces another atom
Explanation:
:)
what is not consider a property of substance
Answers
Answer:
f
Explanation:
9. Use the simulation to build a system with 5 domains. This is called a trigonal bipyramidal structure. There are two different sites in a trigonal bipyramid as labeled: axial and equatorial. a. Each axial atom is adjacent to equatorial atoms. b. Each equatorial atom is adjacent to 2 axial atoms and 2 equatorial atoms. c. In a system with 4 atoms and 1 lone pair, predict whether the lone pair will be in an axial site or an equatorial site? Explain.
Answers
Answer:
Equatorial sites
Explanation:
The choice of the location of bond pairs or lone pairs depends on the difference between the Xax-E-Xeq and Xeq-E-Xeq bond angles. Where X is a bonding group and E is a lone pair.
It follows that if we place the lone pair in an equatorial site, the structure is less crowded and there is less repulsion than when we place the lone pairs in an axial site.
Summarily, a lone pair occupies more space around the centeral atom than a bond pair hence it needs to be placed at an equatorial site where it experiences less repulsion than when it is placed in an axial site.
would transition a represent emission or absorption of light? how would the wavelength of the emitted or absorbed photon compare to that of the photon involved in transition c? explain.
Answers
Transition A represents emission of light. This is shown by the downward facing arrow. This photon compares to transition C in the simple fact that A gave up 12.1 eV (therefore it is more intense), whereas C only gave up 10.2 eV (less intense).
The photon A and photon B frequencies were not specified in this case. It is impossible to determine which photon has more energy than the other as a result. It should be noted that the wavelength and electromagnetic frequency of the photon are inversely correlated with the quantity of energy. The corresponding wavelengths were described, but this description is insufficient to estimate the energy of each photon. In conclusion, the wavelength reduces the energy of the photon whereas the frequency controls its amount of energy.
would transition a represent emission or absorption of light? how would the wavelength of the emitted or absorbed photon compare to that of the photon involved in transition c? explain.
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8. Which of the following symmetries are consistent with a two-dimensional crystal? O Translation; 1-, 2-,3- 4-, 5- and 6-fold rotations; reflection and glide. O Translation; 1-, 2-, 3-, 4- and 6-fold rotations; reflection; glide and screw. O Translation; 1-, 2-, 3-,4- and 6-fold rotations; reflection and glide. O Translation, 2-, 3, 4-, and 5 -fold rotations, reflection, glide.
Answers
The symmetries that are consistent with a two-dimensional crystal include translation; 1-, 2-, 3-, 4-, and 6-fold rotations; reflection and glide.
Therefore, the answer is option C: Translation; 1-, 2-, 3-, 4- and 6-fold rotations; reflection and glide.
Two-dimensional crystals consist of two-dimensional lattices that can be defined by their symmetries.
They have five fold and higher rotation axes prohibited by the crystallographic restriction theorem.
The seven crystal systems and the fourteen Bravais lattices can be used to classify two-dimensional lattices based on their symmetries. All seven crystal systems have been found in two-dimensional lattices.
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Question 5 (Mandatory) (1 point) For the reaction shown, how many grams of oxygen will be required to react with 15.5 grams of chromium?4 Cr + 3 O2 --------> 2 Cr2O3Question 5 options:A) 12.7 g O2B) 21.5 g O2C) 14.3 g O2D) 7.15 g O2Question 6 (Mandatory) (1 point) Consider the following combustion reaction: 2 C4H10 + 13 O2 ------------> 8 CO2 + 10 H2OIf 5.05 grams of C4H10 reacts with more than enough of O2, what is the maximum amount of CO2 that can be formed?Question 6 options:A) 122 g CO2B) 15.3 g CO2C) 0.956 g CO2D) 61.2 g CO2Question 7 (Mandatory) (1 point) Consider the reaction between HCl and O2: 4 HCl + O2 ---------------> 2 H2O + 2 Cl2Calculate the theoretical yield of H2O when 64 grams of HCl react with 19 grams of O2.Question 7 options:A) 16 g H2OB) 21 g H2OC) 32 g H2OD) 43 g H2OQuestion 8 (Mandatory) (1 point) Consider the following chemical reaction: 4 Al + 3 O2 ---------------> 2 Al2O3If 12.85 g of Al reacts completely with oxygen and 18.42 g of aluminum oxide is obtained, what is the percent yield of the reaction?Question 8 options:A) 24.28%B) 75.86%C) 65.91%D) 69.76%Question 9 (Mandatory) (1 point) When a mole of gaseous propane (C3H8) reacts completely with oxygen gas, 2044 kJ of energy is formed, along with gaseous carbon dioxide and water vapor. Which of the following equations is a correct representation of this thermochemical reaction?Question 9 options:A) C3H8(g) + O2(g) -----------> CO2(g) + H2O(g) ΔH = -2044 kJB) C3H8(g) + O2(g) -----------> CO2(g) + H2O(g) + 2044 kJC) C3H8(g) + 5 O2(g) + 2044 kJ -----------> 3 CO2(g) + 4 H2O(g) D) C3H8(g) + 5 O2(g) -----------> 3 CO2(g) + 4 H2O(g) + 2044 kJQuestion 10 (Mandatory) (1 point) The evaporation of water is endothermic: H2O(l) + 44.01 kJ --------> H2O(g) If 275 kJ of heat is absorbed, what mass of water will evaporate?Question 10 options:A) 0.347 gB) 2.18 x 105 gC) 113 gD) 6.25 gQuestion 11 (Mandatory) (1 point) Based on the following reaction: BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq) If a reaction mixture contains 4.16 g of BaCl2 and 3.30 g of Na2SO4 how many moles of the precipitate will be formed?Question 11 options:A) 0.178 molesB) 0.0200 molesC) 0.0241 molesD) 0.0278 molesQuestion 12 (Mandatory) (1 point) The following chemical equation, which is unbalanced, shows the reaction for the rusting of iron: Fe(s) + O2(g) → Fe2O3(s)How many moles of O2 are required to react completely with 1.396 g of Fe?Question 12 options:A) 0.00937 moles of O2.B) 0.0187 moles of O2.C) 0.00469 moles of O2.D) 0.0375 moles of O2.Question 13 (Mandatory) (1 point) A reaction mixture of 18.215 g Na2CO3 and 10.938 g HCl react according to the following balanced equation: Na2CO3 + 2HCl → 2NaCl + H2O + CO2What is the theoretical yield for NaCl, in moles, from this reaction mixture?Question 13 options:A) 0.300 moles of NaClB) 0.172 moles of NaClC) 0.150 moles of NaClD) 0.344 moles of NaClQuestion 14 (Mandatory) (1 point) A reaction mixture of 0.1400 g of NaOH and 0.1400 g HCl reacts according to the following equation: NaOH + HCl → NaCl + H2O ∆H = -31.0 kJWhat is the heat change, q, corresponding to this reaction mixture?Question 14 options:A) 0.109 JB) -0.119 JC) -119 JD) -109 JQuestion 15 (Mandatory) (1 point) A mass of 0.6539 g of zinc is dissolved in excess hydrochloric acid, according to the following equation: Zn(aq) + 2HCl(aq) → ZnCl2(aq) + H2(g) How many moles of Cl- ions are formed in the reaction?Question 15 options:A) 0.002 molesB) 0.02 molesC) 0.01 molesD) 0.1 moles
Answers
Question 5
Answer
D - 7.15 g O2
Explanation
Given:
Balanced chemical equation:
\(4Cr\text{ + 3O}_2\rightarrow2Cr_2O_3\)mass of Cr = 15.5 g
Required: mass of Oxygen
Solution:
Step 1: Find the moles of Cr
n = m/M where n is the number of moles, m is the mass and M is the molar mass
n = 15.5 g/51,9961g/mol
n = 0.298 mol
Step 2: Use stoichiometry to find the moles of O
The molar ratio between Cr and O is 4:3
Therefore the number of moles of O = 0.298 x (3/4) = 0.224 mol
Step 3: From the moles, we can find the mass of O
m = n x M
m = 0.224 x 31.998
m = 7.168 g which is closer to D = 7.15 g
calculate the total number of atoms contained within this unit cell. a) 14 atoms b) 4 atoms c) 2 atoms d) 1 atom
Answers
b) 4 atoms, The cube has four corners with one atom each and a fifth atom in the centre of each face. As a result, this unit cell has a total of four atoms.
The crystal structure and the atoms' placement inside the unit cell determine how many atoms are present in the unit cell. There is just one atom in each corner of a straightforward cubic lattice. Therefore, there are a total of 1 atoms present in this unit cell. One atom is present in each of the cube's four corners and a third atom is present in the cube's centre in a body-centered cubic lattice. In a face-centered cubic lattice, there is one atom at each of the cube's four corners plus an extra atom in the middle of each face. Consequently, there are four atoms in total in this unit cell.
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Eighth grade
Calculate velocity
Tisha's friend was rollerblading at 12 meters per second. To try to catch up with her friend,
Tisha ran 95 meters down the street at a constant velocity. She ran that distance in
38 seconds. What was Tisha's velocity?
Answers
Tisha's velocity was 2.5 meters per second as she ran down the street trying to catch up with her friend.
To calculate Tisha's velocity, we need to use the formula:
velocity = distance / time
In this case, Tisha ran a distance of 95 meters in 38 seconds. So her velocity can be calculated as:
velocity = 95 meters / 38 seconds
Simplifying this expression gives us:
velocity = 2.5 meters per second
Therefore, Tisha's velocity was 2.5 meters per second as she ran down the street trying to catch up with her friend who was rollerblading at 12 meters per second.
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a diatomic ideal gas is compressed adiabatically from 3 m3 to 1.4 m3. if the initial pressure is 71 kpa, calculate the final pressure in kpa.
Answers
The final pressure of the diatomic gas that is expanded adiabatically is 140 KPa.
For any adiabatic process, the relation between volume and pressure is given by,
PVⁿ = C
Where P is the pressure and V is the volume,
C is a constant and
n is adiabatic index.
It can be written,
PVⁿ = pvⁿ
The value of adiabatic index for a diatomic gas is 1.44.
P is the initial pressure which is given to be 71KPa,
V is the initial volume which is given to be 3m³.
p is the final pressure,
v is the final volume which is given to be 1.4m³.
So, now putting all the values accordingly,
(3×71000)^1.44 = (1.4×p)^1.44
p = 140KPa
So, the final pressure is 140 KPa.
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isotopes with an even number of both protons and neutrons are generally stable. true or false
Answers
The statement "Isotopes with an even number of both protons and neutrons are generally stable" is TRUE.
Isotopes with an even number of protons and neutrons are known as isotopes. A single element can have a different number of neutrons; such elements are known as isotopes. A nucleus containing a different number of neutrons will have a different mass number than the element's standard atomic number since the mass number is equal to the number of neutrons plus the number of protons in the nucleus.
There are 275 isotopes recognized for 81 stable elements, while there are 50 isotopes for elements that are radioactive and occur naturally.
Isotopes with an even number of both protons and neutrons tend to be more stable, as the strong nuclear force and the electromagnetic force in a nucleus cancel out, causing a more stable nucleus. The vast majority of stable elements have a nearly equal number of neutrons and protons, though there are some exceptions, such as beryllium-8 and helium-3.
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How many moles of calcium carbonate are in 63.8 g of calcium carbonate?
Answers
Answer:
0.638 moles in 63.8g of calcium carbonate
Explanation:
12. Label Each part of the atom:
Answers
Answer:
Atom Labeling
Explanation:
Y- neutron
Z-protron
X - electron
W- nucleus
1. One third of the elements are classified as
1) nonmetals
2) metals
3) metalliods
4) noble gases
Answers
Answer:
One third of the elements are classified as Metals.
PLEASE MARK ME BRAINLIEST.Potassium chloride dissolved in pure water is an
example of
A) an ionic compound dissolved in a polar solvent
B) an ionic compound dissolved in a nonpolar
solvent
C) a covalent compound dissolved in a polar solvent
D) a covalent compound dissolved in a nonpolar
solvent
Answers
Answer:
A) An ionic compound dissolved in a polar solvent
Explanation:
Potassium Chloride's chemical formula is KCl. Most ionic compounds are formed between a nonmetal and a metal. In this case, potassium is acting as the metal and chloride is the nonmetal. Water is a polar solvent due to the electronegativity of the oxygen in the molecule creating a partial negative pole, leaving the hydrogen atoms partially positive. Hence, A is your best answer.
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how many grams of phosphorus are in 50-gram sample of aluminum phosphate
Answers
There are approximately 12.7 grams of phosphorus in a 50-gram sample of aluminum phosphate.
To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to know the molar mass and the chemical formula of aluminum phosphate.
The chemical formula for aluminum phosphate is AlPO4. It indicates that each molecule of aluminum phosphate contains one aluminum atom (Al), one phosphorus atom (P), and four oxygen atoms (O).
To calculate the molar mass of aluminum phosphate, we can add up the atomic masses of its constituent elements based on their stoichiometric ratios:
Molar mass of AlPO4 = (molar mass of Al) + (molar mass of P) + (4 * molar mass of O)
Using the periodic table, we can find the atomic masses of the elements:
Molar mass of Al = 26.98 g/mol
Molar mass of P = 30.97 g/mol
Molar mass of O = 16.00 g/mol
Now, let's calculate the molar mass of aluminum phosphate:
Molar mass of AlPO4 = (26.98 g/mol) + (30.97 g/mol) + (4 * 16.00 g/mol)
= 121.95 g/mol
The molar mass of aluminum phosphate is 121.95 g/mol.
To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to calculate the mass fraction of phosphorus in the compound. The mass fraction is the ratio of the molar mass of phosphorus to the molar mass of aluminum phosphate.
Mass fraction of phosphorus = (molar mass of P) / (molar mass of AlPO4)
= (30.97 g/mol) / (121.95 g/mol)
≈ 0.254
Multiplying the mass fraction by the mass of the sample gives us the grams of phosphorus:
Grams of phosphorus = (mass fraction of phosphorus) * (mass of the sample)
= 0.254 * 50 g
≈ 12.7 g
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why do crystals form during crystallisation
Answers
Answer: Crystallization is a technique which chemists use to purify solid compounds. Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. The process is based on the principles of solubility: compounds (solutes) tend to be more soluble in hot liquids (solvents) than they are in cold liquids. If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the growing crystals and the pure solid crystals can be separated from the dissolved impurities by filtration.
For an example the salt we get from seawater can have many impurities in it. Hence, the process of crystallization is in use to remove these impurities.
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As the solution cools, the solvent can no longer hold all of the solute molecules, and they begin to leave the solution and form solid crystals.
During this cooling, each solute molecule in turn approaches a growing crystal and rests on the crystal surface.
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Mutations occur at a rate of 1 per 1010 base pairs per generation. aureus has 2.8 × 106 base pairs in its genome. Therefore, approximately 0.0028 mutations will occur per cell in the population. At the end of 12 hours, how many mutations will be present in the population of S. aureus in the wound in your foot? What are the implications of this genetic diversity in the context of treating a possible infection?
Answers
After, after 12 hours, we would anticipate roughly 27 mutations to be present in the S. aureus population in your foot wound.
Part 1-
First, the size of the S. aureus population in the wound in your foot should be found. Let's assume that the population size is 1 million (1 x 10^6) cells.
The mutations estimated in one generation per cell are:
1 mutation per 10¹⁰base pairs
The base pairs in the genome of S. aureus are 2.8 x 10⁶
Therefore, the expected number of mutations per generation per cell is:
(2.8 x \(10^{6}\)) / (\(10^{10}\)) = 2.8 x \(10^{-4}\) mutations per cell per generation
To estimate the number of mutations in the population which occur after 12 hours the number of generations that have passed needs to be known. The generation time of S. aureus is approximately 30 minutes, so the number of generations in 12 hrs (hours) will be:
12 hrs x (60 minutes/hr) / (30 minutes/generation)
= 24x4 equals 96 generations
In 96 generations the approximate number of mutations per cell is:
96 generations x 2.8 x \(10^{-4}\) mutations per cell per generation
= 0.027 mutations per cell
If we multiply mutations per cell by the number of cells in the population, to know the total number of mutations in the population:
i.e.,0.027 mutations taking place per cell x 1 x 10⁶ cells gives 27 mutations
Therefore, after 12 hours, we can expect approximately 27 mutations to be present in the population of S. aureus inside the wound in your foot.
Estimatedly, 0.0028 mutations will take place per cell in the population. After the end of 12 hours, 0.0028 * 16,777,216 = 46,976 new mutations will exist.
Part 2-
The implications of this genetic diversity in the context of treating possible infections is that host genetic diversity is thought to reduce the possibility that the disease will widen in natural populations.
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what is the standard enthalpy of combustion of ethane? (b) what is the specifi c enthalpy of combustion of ethane? (c) is ethane a more or less effi cient fuel than methane?
Answers
Ethane gas, C2H6(g), has a combustion enthalpy of roughly -1.5*103 kJ/mol.
Compared to pure methane, gaseous blends with ethane as a component have higher thermal efficiency and shorter combustion times.
Calculate the amount of fuel that has been burned in moles?This can be accomplished by calculating the difference between the mass of the fuel before and after the water has heated. Calculate how much energy is released by one mole of the material. By dividing by 1000, you may obtain the answer in KJ. This gives you the J/mol-1.
What factors affect combustion enthalpy?The amount of H in a reaction is determined by the physical states of the reactants and products (gas, liquid,).
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Element of group 2 loses two electrons in the process of a chemical combustion. what is the ionic charge? +2 or -2
Answers
Determine the empirical formula of a compound containing 48.38 grams of carbon, 6.74 grams of hydrogen, and 53.5 grams of oxygen.
in an experiment, the molar mass of the compound was determined to be 180.15 g/mol. what is the molecular formula of the compound?
do not send links as an answer
Answers
Answer:
First, I will convert from grams to moles. This will give me approximately 4.032 moles of carbon, 6.740 moles of hydrogen, and 3.344 moles of oxygen. Then, I will calculate the mole ratio, using whole numbers. I must also identify the least amount of moles in an element for this step, which is oxygen at 3.344 moles.
Oxygen = 3.344/3.344 = 1
Carbon = 4.032/3.344 = 1
Hydrogen = 6.740/3.344 = 2
The empirical formula will be COH2.
Now that we have the molar mass of the molecular formula, we can calculate for the molecular formula. First, we will begin by discovering the molar mass of the empirical formula, which will be C molar mass x 1 + O molar mass x 1 + H molar mass x 2. That will be equal to 60.949. After that, we can divide the molecular mass by the empirical formula molar mass, giving us approximately 3. Now we will multiply the empirical formula by 3, giving us our molecular formula, which will be equal to C3O3H6.