Answer:
Explanation:
CH₄ + 2O₂ = CO₂ + 2H₂O
C₂H₄ + 3O₂ = 2CO₂ + 2H₂O
Let volume of CH₄ be V , so volume of C₂H₄ will be 5 - V
CH₄ + 2O₂ = CO₂ + 2H₂O
1 vol 2 vol
V 2 V
V vol of CH₄ will require 2 V of O₂
C₂H₄ + 3O₂ = 2CO₂ + 2H₂O
5 - V 3( 5 - V )
5 - V vol of C₂H₄ will require 3 ( 5 - V ) vol of oxygen .
Total oxygen required = 2 V + 3 ( 5 - V )
2 V + 3 ( 5 - V ) = 13.2
2 V + 15 - 3V = 13.2
V = 1.8 ml
vol of CH₄ = 1.8
vol of C₂H₄ = 5 - 1.8 = 3.2 ml.
At the south Texas nuclear power plant, uranium atoms are split in order to create heat. The heat is used to make steam, which turns a generator to make electricity. What energy changes takes place during this process?
A-Chemical energy to nuclear energy to electrical energy to heat energy
B-Mechanical energy to nuclear energy to heat energy to light energy
C-mechanical energy to heat energy to chemical energy to electrical energy
D-nuclear energy to heat energy to mechanical energy to electrical energy
Answer:
Inside the reactor
In a nuclear reactor the uranium fuel is assembled in such a way that a controlled fission chain reaction can be achieved. The heat created by splitting the U-235 atoms is then used to make steam which spins a turbine to drive a generator, producing electricity.
Which pair of atoms would form a polar covalent bond?
H and F is the pair of atom which ahs polar covalent bond. Thus option b is correct.
What is polar covalent bond?Polar covalent bond is defined as type of chemical bond where a pair of electrons is unequally shared between the two atoms due to the difference in their electronegativity.
HCl, H2O and HF etc. are some of the examples of polar covalent bond.
Non polar covalent bond is defined as type of chemical bond with equal sharing of the bond electron rises when the electronegativity of the two atoms are equal.
H2, N2, O2 etc. are some of the examples of non polar covalent bond.
Thus, H and F is the pair of atom which ahs polar covalent bond. Thus option b is correct.
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Your question is incomplete, but probably your complete question was
Which pair of atoms would form a polar covalent bond?
a. H and H
b. H and F
c. N and N
d. Na and F
Show that the atomic packing factor for BCC is 0.68.
Answer:
wwe are asked to prive the atomic pavking factor APF for BCC is 0.68
solution
APF is given by equation (3.3) in the form
APF =nVs/Vc
whenn is the number of atoms per unit cell and for BCC n=2.0, Vs is the volume of the atom and it is given by 43π3³ and Vc is the volume of the unit cell and for BCC Vc=a³ where a is the side of the cube. From equation 3.4
we could get a by
a=4R/√3
where R is the radius of the atom. Now let us olug the expression inyo equation (1) to get APF
APF = nVs/Vc
=2.0(4/3πR³) / (4R/√3)³
=2.0(4/3πR³) / (4/√3)³ R³
=0.68
2 plus 45 was near tyhe decimal value of h solve for 123v minus 45b
Answer:
47
Explanation:
What physical and chemical properties should braces (used to straighten teeth possess in order to attain its desired goal to straighten the teeth) while not presenting a health hazard to the individual?
Answer: Braces are used by the people to correct the alignment and position of tooth or teeth in the jaw.
Explanation:
The teeth braces must have strong tensile strength and must create a constant pressure on the teeth so as to allow the straightening of the teeth.
The strong force of attraction between the molecules of the braces material that can be steel, nickel, molybdenum, copper, titanium. This makes the bracing material rigid on the teeth.
Oxidation of 1-pentanol could produce 1-pentanal and 1-pentanoic acid
Which form of energy can be connected closely to climate change?
coal
hydroelectric
wind
solar
Answer:
COAL
Explanation:
The members of a family observed that their water
meter was showing unusually high water use. They
thought of two methods to solve this problem.
Method 1: Wash fruits and vegetables in a pan of
graywater instead of running water from the tap.
Method 2: Collect the water used for rinsing fruits
and vegetables and reuse it to water house plants.
Which of these statements is most likely correct
about the two methods of water conservation? (3
points)
Method 2 is difficult to implement.
Method 1 is not healthy for humans.
O Method 2 is not environment friendly.
SW
O Method 1 is ineffective.
Answer:
Method 1 isn't safe for humans.
Answer: Method 2 is not environment friendly, or D.
Explanation: Recycled water, or graywater, is very harmful to the fish and if used to contain them within the farm, it would make the fish overall very sick, and the fish would be refused from being sold into stores. Thus, this is the correct answer.
Need help here plz ASAP!!!!!!!!
Answer:
Three! 3
Explanation:
O2 means that there are two oxygen and I is just one
Answer:
Explanation:
First one is compound
The second one is three
The third one is so dissolving in a glass of water
Why does sodium have a lower melting point then magnesium
Answer:
Number of delocalized electrons
Explanation:
Magnesium has more delocalized electrons compared to sodium and this accounts for the higher melting point.
When magnesium atoms comes together to form a metallic bonds, they have more network of delocalized electrons. There is more pull for the localized electrons due to the nuclear charge on the nucleus. This strong intermolecular metallic bond increases the melting point of magnesium.Identify the type of sugar corresponding to each name. Sucrose Lactose Fructose Starch Glucose
Answer: Please see answers in explanation column
Explanation:
Name Type of sugars
Sucrose Disaccharide
Sucrose, also called table sugar with molecular formulae C12H22O11 is a disaccharide composed of two monosaccharides ( 50%glucose + 50% fructose.).
Lactose Disaccharide
Lactose with molecular formula C12H22O11, found in milk is a disaccharide composed of two monosaccharides (galactose and glucose).
Fructose Monosaccharide
Fructose with molecular formulae C6H12O6 is a natural sugar mostly found in fruits.
Starch Polysaccharide
Starch ,a complex carbohydrate with molecular formula (C6H10O5)n, is a Polysaccharide containing many units of glucose joined together by 1,4 linkages. Sources of starch can be found in the parts of plants( roots, tubers etc).
Glucose monosaccharides
Glucose, is a simple sugar (monosaccharides) with the molecular formula C6H12O6. It is found in parts of plants as well as in humans and known as blood sugar because of its location in the bloodstream.
James watson and francis discovers that hydrogen bond form between nitrogen bases in the dna molecule.why was the discovery important to understanding how dna replicates
Explanation:
!!!!!!!!!!!!!!!!!!!!!!!!!!!
At STP, one mole of oxygen and one mole of neon contain equal numbers of
Answer:
D) particles but the oxygen has a greater mass.
Explanation:
Just took the test and got it right
At STP, one mole of oxygen and one mole of neon contain equal numbers of particles but oxygen has greater mass.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
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how many bonding electrons pairs are in SO2
The Sulfur Dioxide which is also known as Sulphur Dioxide is the entity of a bond between Sulfur and Oxygen atoms. It is known as a formula written as SO2. Here we will provide an explanation of SO2 molecular geometry, SO2 electron geometry, SO2 bond angle, and SO2 Lewis structure.Now, if we want to check the exact molecular shape of SO2, then we should understand the positions and number of electrons distributed between Sulphur and Oxygen. In the outer level, Sulphur has six electrons, and the Oxygen has four of them among which one electron is used for each bond. So total number of ten electrons in five pairs. To make bonds, four pairs are needed, so one pair remains alone. The two double bonds use two pairs each and form as a single unit.As the single alone pair not counted in the shapes description, we can conclude that the molecular shape of SO2 is V-Shaped or Bent. So, our first perception of the original structure does not match with the original one. The electron geometry of SO2 is formed in the shape of a trigonal planner. The three pairs of bonding electrons arranged in the plane at an angle of 120-degree. As the one pair remained alone, two double pairs are bonded and form a bent shape. By analyzing the Lewis structure of SO2, we can see that the SO2 is asymmetrical because it contains a region with different. Though there are so many similarities between electron geometry and molecular geometry, there are some key differences. One of the most notable differences is that the electron geometry can be associated with one or more molecular shapes. It depends on the central atoms structure of electrons of the molecule, while the molecular geometry depends on the other atoms too which are bonded to the central atom or the free pairs of electrons.To create the Lewis structure of SO2, you need to arrange the eight valence electrons on the Sulphur. To design the best Lewis structure, you also need to calculate the formal charge of every atom too. You know that both the Sulphur and Oxygen has six valence electrons each. Here we have two Oxygen atoms, so a total number of valence electrons will be eighteen.The SO2 has a bond angle of 120-degree. One single atom of Sulphur is bonded with two atoms of Oxygen covalently. It causes a repulsion of electron pairs to form the 120-degree angle.
Other oils, such as car oil and vegetable oil, also consist largely of bonded carbon and hydrogen atoms. Would you predict that these substances are able to mix with gasoline? With water? Explain your answers.
Answer:
Car oil and vegetable oil will mix well with gasoline
Car oil and vegetable oil will not mix with water.
Explanation:
Car oil and vegetable oil will mix well with gasoline
Car oil and vegetable oil will not mix with water.
This is because of the rule of solubility. According to this rule, like substances will only dissolve like substances. In essence, a polar compound will only dissolve another polar compound. A non-polar compound will dissolve only in a non-polar solvent.
Water is polar and oil is non-polar. The cannot mix.
Gasoline is non-polar and will dissolve oil which is also non-polar .
The Sun keeps shining a) mostly by gravitation contraction b) mostly by chemical reactions c) by converting hydrogen to helium. d) by converting hydrogen to carbon. e) by E = mc2. f) by F=G M_1 M_2/R12
Answer:
C) by converting hydrogen to helium.
Explanation:
The Sun keeps shining because of nuclear fusion processes, which consists in creating helium atoms by combining hydrogen atoms, of an atomic mass less that of helium, in conditions of high core pressure and temperature. In other words, the Sun keeps shining by producing helium at the expense of its hydrogen reserves.
Therefore, the correct answer is C.
Iron react with oxygen to form Iron (III) Oxide. How many moles of iron (III) Oxide is in 138.5g?
Answer:
0.87mole
Explanation:
The reaction equation is given as;
4Fe + 3O₂ → 2Fe₂O₃
Number of moles of Fe₂O₃ in 138.5g
To solve this problem;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of Fe₂O₃ = 2(56) + 3(16) = 160g/mol
Now;
Number of moles = [tex]\frac{138.5}{160}[/tex] = 0.87mole
Based on Table S, which group on the Periodic Table has the element with the highest electronegativity ? (1) Group 1 (2) Group 2 (3) Group 17 (4) Group 18
Answer:group 17
Explanation: I don’t know I just guessed and got it right .
In comparison to other groups, Group 17 has the highest electronegativity. A further explanation is below.
The different components such as fluorine, chlorine, bromine, iodide, as well as actinides, are found throughout the periodic tables' Group number 17 elements. These would be referred to together as HALOGENS.Because these components frequently combine or interact with alkali metals as well as alkaline earth materials that can generate halide salts, this same name "halogen" implies "salt-former."
Thus the response above i.e., option (3) is right.
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What is the energy of an object because of its potential and kinetic energies?
chemical energy
electrical energy
nuclear energy
mechanical energy
Can yall plz answer fast!? 20 points if you arent sure its right dont bother
Answer:
The sum of an object's potential and kinetic energies is called the object's mechanical energy. As an object falls its potential energy decreases, while its kinetic energy increases. The decrease in potential energy is exactly equal to the increase in kinetic energy
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Select the correct answer. What inference can be drawn from the graph? a graph of reactant and product concentration vs. time; a red curve shows the reactant decreasing and a blue curve shows the product concentration increasing over time; the two curves do not intersect; the chemical equation shows A + B reacting to produce C + D A. The reaction between A and B is reactant favored. B. The amount of product is greater than the amount of reactant. C. The reaction uses all its reactants to form products. D. The reaction reaches equilibrium at 1.5 seconds. E. The amount of reactants is highest at equilibrium.
Answer:
The answer to the graph below is B
Explanation:
The graph has been depicting that there has been higher concentration of the product as compared to the reactant in the reaction mixture. Thus, option B is correct.
The graph drawn has been the concentration of the reactant and product with respect to the time. The line red has been the reactant concentration, while blue line has been the product concentration.
With the chemical reaction, there has been the decrease in the reactant concentration with the increase in the product concentration.
The graph has been depicting that there has been higher concentration of the product as compared to the reactant in the reaction mixture. Thus, option B is correct.
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Which characteristic applies to all mixtures?
Answer:
A mixture is the blending of two or more dissimilar substances. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous).
Explanation:
Answer:
A mixture is the blending of two or more dissimilar substances. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous
How would u describe the shape of a big drop of water. Thanks everyone for your help
Answer:
It is a semi circle with a triangle on top
what is used to help water wash away greasy dirt
Answer:
soap
Explanation:soap
Answer:
A molecule with polar and nonpolar ends
Explanation:
which of these zones of the ocean is most hospitable to life?
epipelagic
hadalapic
bathypelagic
abyssopelagic
Answer:
The correct answer is the epipelagic zone
What processes are involved in water cycling through the environment?
How many moles of titanium (Ti) atoms are in 85.3 g of Ti?
Answer:
1.7820210165667731 your welcome :)
Explanation:
If you mass 0.430 g of Co(NO3)2 6H2O and dissolve it in water, what further information would you need to calculate:_________.
a. the number of moles of Co(NO3)2 in the solution?
b. the molarity of the solution
Answer:
a. No information is required.
b. The volume of the solution.
Explanation:
Hello!
In this case, since hydrates are salts which have additional water in their structures, when making mole-mass calculations involving them, we need to consider the how many water molecules we find in the hydrate. In such a way, for 0.430 g of cobalt nitrate hexahydrate (six water molecules), we proceed as follows:
a. Since we have 0.430 g of hydrate, we may compute the moles of anhydrous cobalt nitrate by using the molar mass of the hydrate (291.04 g/mol) and then, by noticing that one mole hydrate has one mole of anhydrous, we are able to compute the moles of anhydrous cobalt nitrate as shown below:
[tex]0.430gCo(NO_3)_26H_2O*\frac{1molCo(NO_3)_26H_2O}{291.04gCo(NO_3)_26H_2O} *\frac{1molCo(NO_3)_2}{1molCo(NO_3)_26H_2O}\\\\=1.48x10^{-3}mol Co(NO_3)_2[/tex]
It means no further information is required.
b. Since the molarity is defined by the division of the moles of solute over liters of solution (M=mol/V), we would need the volume of the solution to successfully compute it.
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An ion that consists of 7 protons, 9 neutrons, and 10 electrons has a net charge of
Answer:
-3
General Formulas and Concepts:
Chemistry - Atomic Structure
Protons have a positive (+) chargeNeutrons have a neutral (0) chargeElectrons have a negative (-) chargeExplanation:
Step 1: Define
7 protons, 9 neutrons, 10 electrons.
+7, +0, -10
Step 2: FInd charge
7 + 0 - 10 = -3
A molecule is made up of two or more atoms bonded together. True or false
Answer:
True
Explanation:
a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.
What does the VSEPR theory describe?
A. Why a full octet of valence electrons makes an atom stable
B. Which atoms are more electronegative than others
C. Why molecules have different shapes
D. How atomic radii change during bonding
Answer: it is C, why molecules have different shapes.
Explanation:
A P E X
The VSEPR theory (Valence Shell Electron Pair Repulsion theory) describes why molecules have different shapes.
C. Why molecules have different shapes.
The VSEPR theory is a model used to predict the shapes of molecules based on the repulsion between electron pairs in the valence shell of the central atom. It states that electron pairs, whether bonding or non-bonding, repel each other and tend to position themselves as far apart as possible to minimize electron-electron repulsion. This repulsion determines the spatial arrangement and overall shape of the molecule.
By considering the number of electron pairs around the central atom and the repulsion between them, the VSEPR theory can predict molecular geometries, including linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral, among others. It explains why molecules such as water (H₂O) have a bent shape or why carbon dioxide (CO₂) is linear.
Therefore, the correct answer is C. The VSEPR theory describes why molecules have different shapes by considering the repulsion between electron pairs in the valence shell of the central atom.
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