Answers
The container's building bricks are a type of material known as a mixture since it consists of two different components.
What is being displayed?A mixture of two chemicals would be the kind of substance represented in the diagram. This is so because the first brick is made of two separate elements, one of which is yellow and the other of which is black. The other block has a red and blue color scheme to indicate that it is also a composite made up of two separate elements.
What are combinations and substances?Chemical reactions between two or more elements can result in the formation of compounds. Physical mixing of two or more substances results in the formation of mixtures. 2. Types. Three categories of compounds are possible.
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Related Questions
Calculate the concentration for the following pH: pH = 13.8
A) [H3O+] = 1.0 x 10-4 M
B ) [H3O+] = 1.0 x 10-14 M
C) [H3O+] = 1.6 x 10-4 M
D) [H3O+] = 1.6 x 10-14 M
Answers
To calculate the concentration for a given pH, we can reverse the process and use the exponential function:
[H3O+] = 10^(-pH) = 10^(-13.8) = 1.0 x 10^(-14) M
So, the concentration for a pH of 13.8 is [H3O+] = 1.0 x 10^(-14) M.
Answer: D) [H3O+] = 1.6 x 10-14 M
A+B _ 2c find Kc and initial concentration
Answers
the lattice constant of gaas is 5.65 a, determine the number of ga atoms and as atoms per c m 3 . (b) determine the volume density of germanium atoms in a germanium semiconductor. the lattice constant of germanium is 5.65 a..
Answers
The Number of atoms per unit cell for Ga = 4 atoms per unit cell. Number of atoms per unit cell for As = 4 atoms per unit cell. Volume density of Germanium in its unit cell = 4.35 × 10²² /cm³
According to published data, GaAs has a number density of 4.42 x 10²²atoms/cm³.
Because it is well known that Ga and As are essentially equally distributed throughout GaAs.
Ga's number density is equal to As's number density (2.21 x 10²² atoms/cm³).
Volume of the unit cell = (lattice parameter)³ = (5.65 × 10⁻⁸)³ = 1.804 × 10⁻²² cm³
a) Number of atoms per unit cell for Ga and As = number density × volume of unit cell = 2.21 × 10²² × 1.804 × 10⁻²² = 4 atoms/unit cell
b) Volume density = Number of atoms per unit cell/volume of unit cell
A germanium unit cell contains 8 atoms (from literature)
Volume of unit cell = (lattice parameter)³ = (5.65 × 10⁻⁸)³ = 1.804 × 10⁻²² cm³
Volume density = 8/(1.804 × 10⁻²²) = 4.35 × 10²² /cm³
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Approximately 12 billion kilograms of phosphoric acid (H3PO4) are produced annually for fertilizers, detergents, and agents for water
treatment. Phosphoric acid can be prepared by heating the mineral fluoroapatite (Cas(PO4)3F) with sulphuric acid in the presence of
water.
Cas(PO4)3F+5H₂SO4 + 10H₂0-3H3PO4 + 5CaSO42H₂O + HF
If every kilogram of fluoroapatite yields 386 g of phosphoric acid, what is the percent yield?
Answers
The actual yield divided by the hypothetical yield multiplied by 100 is known as percent yield. The percent yield is 68.04 %.
What is the yield in percentage?The percent yield is the difference between the actual yield and the hypothetical yield multiplied by 100.
A number of factors, which will be discussed in more detail in later chapters of the course, can cause a chemical reaction's actual yield to be lower than its theoretical yield.
The percentage yield of a chemical reaction indicates the efficiency of that reaction.
It provides us with information about the percentage of our reactants that successfully transformed into a product in terms of percentages.
[tex]Ca_5(PO_4)_3F + 5H_2SO_4 + 10H_2O $\rightarrow$ 3H_3PO_4 + 5CaSO_4.2H_2O + HF[/tex]
504.3 g 294 g
1 x 103 g ??
[tex](504.3 g ) Ca5(PO_4)_3F \rightarrow H_3PO_4 (294 g)[/tex]
1000 g [tex]Ca5(PO_4)3F \rightarrow[/tex] ??
theoretical yield of H2PO4 = "[tex]1000\ \times \frac{294}{504.3}[/tex]
= 582.986 g
actual yield = 396 g
percent yield = [tex]"\frac{396}{582}\times 100"[/tex]
="percent yield = 68.04 %"
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what is answer number 23 please
Answers
The compounds that are listed on the table are molecular compounds.
What is molecular compounds?A molecular compound is made up of molecules with formulas that represent the number of atoms bonded together in the molecule. The atoms are joined to form a definite shape that is defined by the angles between the bonds and the lengths of the bonds.At room temperature, most molecular compounds are gases or liquids, and those that are solids are soft and pliable. They have low melting and boiling points, are poorly soluble, and are poor electrical conductors.Molecular compounds are created by combining two or more nonmetals and sharing their electrons to form an octet. Covalent bonds allowed nonmetals to share electrons.To learn more about molecular compounds refer to :
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which of the following statements describes a lewis acid-base reaction correctly?multiple choice question.the base removes a h from the acid.the acid donates an electron pair to the base.the acid donates a h to the base.the base donates an electron pair to the acid.
Answers
The following statement that correctly describes a Lewis acid-base reaction is that the base donates an electron pair to the acid.
What is the acid-base?Acid-base is a chemical reaction involving acid and base reactants. It can be used in determining the pH.
According to Lewis, an acid is a substance that accepts an electron pair. While a base is a substance that donates or donates electron pairs. The electron transport causes acids and bases to react, resulting in a coordinated covalent bond.
Lewis's acid-base theory is able to explain the acid-base properties of molecules or ions that have lone pairs of electrons or that can accept lone pairs of electrons, such as in the formation of complex compounds.
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A soft gel capsule contains 700 mcg of vitamin A.
If a capsule weighs 1.1 g, what percent of the capsule is vitamin A?
Express your answer using two significant figures.
Answers
Answer:
To find the percent of the capsule that is vitamin A, we need to divide the weight of the vitamin A (700 mcg) by the total weight of the capsule (1.1 g) and multiply by 100.
First, we need to convert the weight of the vitamin A from micrograms to grams:
700 mcg = 0.0007 g
Then we can use the following formula:
(Weight of Vitamin A / Total weight of capsule) x 100 = % of capsule that is Vitamin A
(0.0007 / 1.1) x 100 = 0.63 x 100 = 63%
So, 63% of the capsule is vitamin A, rounded to two significant figures.
Explanation:
Hope this helps!
Find the Compound Formula
Cation: Cu+
Anion: S2-
Formula =
Cation: Ni2+
Anion: F-
Formula =
Cation: Cr3+
Anion: Cl-
Formula=
I'm struggling so much with understanding how to get the compound formula. Please leave and explanation and thank you
Answers
Answer:
Explanation:
Cu⁺ and S²⁻
You know the charge on copper is +1 and the charge on sulfur is -2. Use the "swap and drop" method to write the formula.
Swap the numbers and then drop them as the subscript for each element. Place the 2 as the subscript on copper and 1 as the subscript on sulfur.
Cu¹⁺ S²⁻
Cu₂S₁
Since we do not write the subscript when it is 1, do not use S₁. Use the formula shown below.
Formula = Cu₂S
You will use the same method to answer the other questions.
Ni²⁺ F¹⁻
Formula = NiF₂
Cr³⁺ Cl¹⁻
Formula = CrCl₃
Classify each statement as an observation, a law, or a theory. Drag the appropriate items to their respective bins.: (A): Neon does not react with sodium at room temperature and pressure. (B): Chlorine reacts violently with sodium at room temperature and pressure. (C): If elements are listed in order of increasing mass of their atoms, their chemical reactivity follows a repeating pattern. (D): The reactivity of elements depends on the arrangement of their electrons. Observation: (A), (B) Law: (C) Theory: (D)
Answers
Observation, theory, and law all play significant roles in the philosophy of science. The statement the reactivity of elements depends on the arrangement of their electrons is a theory.
Chlorine reacts violently with sodium at room temperature and pressure and Neon does not react with sodium at room temperature and pressure are observations.
The statement, If elements are listed in order of the increasing mass of their atoms, their chemical reactivity follows a repeating pattern = law.
In most contexts, the act of sensing the exterior real objects that surround us is known as observation. Observation relies heavily on the use of many sensory organs.
A scientific explanation of a witnessed action or occurrence is an example of what we mean when we talk about theory. It provides an explanation for the observations or events that are based upon any hypothesis that has been demonstrated to be correct. A phenomenon or behavior that has been observed can be described using the term "law." It is widely accepted in most circles as a statement of fact.
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Match the following pairs of substances with the IMF that exists between them.1. Dipole-induced dipolesodium ion and water HCl and CH3F ammonia and water oxygen gas and water2. Hydrogen bondingsodium ion and water HCl and CH3F ammonia and water oxygen gas and water3. ion-dipolesodium ion and water HCl and CH3F ammonia and water oxygen gas and water4. dipole-dipole interactionsodium ion and water HCl and CH3F ammonia and water oxygen gas and water
Answers
The various interactions for the substances in question are listed below.
1) Oxygen gas (O₂) and water have dipole - induce dipole interaction.
2) Sodium ion and water have ion - dipole force.
3) HCl and CH₃F have dipole - dipole force.
4) Ammonia and water have hydrogen bonding.
Intermolecular forces (IMF) are defined as that of the attractive as well as repulsive forces which thus arise between the molecules in a substance.
Hydrogen bonding would be defined as that of the interaction of a hydrogen atom among both two other atoms with a high affinity for electrons; this bond is relatively weak than that of an ionic bond as well as covalent bond and even though powerful than van der Waals forces.
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element compounds and mixtures
Answers
Answer:
1.) The smallest unit of an element that maintains the properties of the element is an atom.
2.) All compounds are molecules, but not all molecules are compounds.
A compound is a substance formed by the chemical combination of two or more elements in fixed proportions. Compounds have distinct properties that are different from those of their constituent elements.
A molecule is a group of two or more atoms held together by chemical bonds. Molecules can be made up of a single type of atom (such as O2 or N2) or a combination of different elements (such as H2O or CO2). Not all molecules are compounds, as some can be made up of a single type of atom.
3.) Mixtures that look the same throughout and have the same composition and properties in all parts of the mixture are called homogeneous mixtures. An example of a homogeneous mixture is salt water, where the salt is evenly dispersed in the water and cannot be seen or felt as separate particles. Other examples of homogeneous mixtures include air, sugar in water, and gasoline.
4.) A heterogeneous mixture that has particles that will mix but slowly settle out is called a suspension. In a suspension, the particles are large enough to scatter light, making the mixture appear cloudy or murky. The particles in a suspension are not evenly distributed throughout the mixture and will eventually settle to the bottom if left undisturbed for a period of time. Examples of suspensions include muddy water, orange juice with pulp, and paint.
5.) Mixtures that look different throughout and have varying composition and properties in different parts of the mixture are called heterogeneous mixtures. An example of a heterogeneous mixture is fruit salad, where different types of fruit are physically combined but remain distinct and can be separated from each other. Other examples of heterogeneous mixtures include granola, a pile of mixed rocks, and a glass of ice water with ice cubes floating in it.
6.) A heterogeneous mixture that has large particles that do not stay mixed is called a colloid. In a colloid, the particles are larger than those in a solution, but smaller than those in a suspension, and are evenly dispersed throughout the mixture. Colloids often appear homogeneous, but the particles will separate if the mixture is left undisturbed for a period of time. Examples of colloids include milk, fog, and whipped cream.
7.) A chemical change is a process in which a substance undergoes a transformation to produce one or more new substances with different chemical properties. In a chemical change, the original substances are broken down and rearranged into new substances, resulting in a permanent change. The substances produced in a chemical change cannot be easily reversed to their original form. Examples of chemical changes include burning, rusting, digestion, and rotting.
8.) A molecule is a group of two or more atoms held together by chemical bonds. When atoms bond together to form molecules, they create new substances with unique chemical and physical properties. Examples of molecules include water (H2O), carbon dioxide (CO2), and glucose (C6H12O6). These molecules are composed of chemically combined particles (atoms) that can no longer be separated into individual atoms by physical means.
9.) A substance made up of different kinds of atoms chemically combined is called a compound.
10.) Yes, mixtures can be classified based on particle size.
In general, mixtures can be classified into three categories based on particle size: solutions, suspensions, and colloids.
A solution is a homogeneous mixture of two or more substances, where the particles are small enough to be evenly dispersed throughout the mixture, giving it a uniform appearance.
A suspension is a heterogeneous mixture of larger particles that will eventually settle out if left undisturbed.
A colloid is a heterogeneous mixture with particles that are larger than those in a solution, but smaller than those in a suspension. Colloids appear homogeneous, but the particles will separate over time if left undisturbed.
This classification based on particle size is useful for understanding the behavior and properties of mixtures, as well as for separating and purifying substances.
11.) Physical changes.
12.) The substance that is dissolved to make a solution is called the solute.
13.) Homogeneous mixtures that have small particles that completely dissolve in one another are called solutions.
14.) The substance that does the dissolving in a solution is called the solvent.
15.) The substance made of elements and compounds that are not chemically combined is called a mixture.
16.) A technique used to separate a mixture of different liquids with different solubilities is called liquid-liquid extraction.
17.) A type of mixture that does have a uniform composition is called a homogeneous mixture.
18.) Elements and compounds are examples of pure substances.
P.S. I hope you learned something!
A certain substance, X, decomposes. 75 % % of X remains after 100 minutes. How much X remains after 200 minutes if the reaction order with respect to X is the following order: zero, first, second
Answers
A certain substance, X, decomposes. 75 % % of X remains after 100 minutes. How much X remains after 200 minutes if the reaction order with respect to X is zero order.
What is zero order reaction ?The term zero order reaction is defined as those in which the concentration of the reactants does not change over time and the concentration rates remain constant.
Zero Order: t(1/2) = [A]o/(2*k),
Therefore, k = [A]o/(2 * t(1/2)), where t(1/2) = 100 min. and [A]o=100% So incorporate condition.
A= - .0005 x 200 mins+1 of introductory fixation approaches zero percent.
Initially Order: Half-life condition k=.00693 remaining with 100 mins half life
Coordinate condition lnx= - .00693x200mins + ln 1 squares with lnx= - 1.386.
Take to the e to counteract ln so x=.25 or 25%
Second Order Initial Concentration of 1, half-existence of 100 mins.
K= .01.
Coordinate condition 1/x = .01 x 200 +1. X
= 33.3%
Thus, A certain substance, X, decomposes. 75 % % of X remains after 100 minutes. How much X remains after 200 minutes if the reaction order with respect to X is zero order.
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the fact that oxygen is an atom that is strongly electronegative means that group of answer choices the bond formed will always be ionic since there is unequal sharing it more strongly pulls shared electrons toward itself when forming a covalent bond with a less electronegative atom it equally pulls shared electrons toward itself when forming a covalent bond with a less electronegative atom the less electronegative atom will pull the electrons more strongly than oxygen will
Answers
The fact that oxygen is an atom that is strongly electronegative means that when forming a covalent bond with a less electronegative atom, it will pull the electrons more strongly than the less electronegative atom will, resulting in unequal sharing of electrons.
This unequal sharing of electrons means that the bond formed will always be ionic. Additionally, the ionic bond is usually the strongest type of bond, and it can be difficult to break the bond. This makes ionic bonds ideal for holding molecules together or for creating strong materials.
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Please answer my question.
Answers
When chlorine react in ionic form, it gain one electron as its electronegativity is very high. chlorine form mostly ionic compound.
What is ion?An atom or molecule is said to be an ion if a number of its electron pairs have been acquired or lost, giving it a net negative or positive electrical charge.
In other terms, a chemical species has an unbalanced ratio of proton (positively charged particles) to electrons (negatively charged particles). When chlorine react in ionic form, it gain one electron as its electronegativity is very high. chlorine form mostly ionic compound.
Therefore, when chlorine react in ionic form, it gain one electron as its electronegativity is very high.
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What is the work associated with decomposition of trinitrotoluene (TNT) upon detonation according to the following reaction at 279.65 K ?
C7H5N3O6(s)⟶32N2(g)+52H2(g)+3O2(g)+7C(s)
Answers
The work associated with the decomposition of TNT upon detonation can be determined by using the First Law of Thermodynamics.
What is the first law of thermodynamics?According to the First Law, the change in internal energy (ΔU) of a system is equal to the heat added to the system (q) minus the work done by the system (w).
In this case, the reaction is exothermic and heat is released, meaning that q is negative. The work done by the system can be calculated using the equation:
w = -PΔV
where P is the pressure and ΔV is the change in volume is used to calculate the work done by the system.
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"What is the mass of a gold bar that is 7.379 × 10–4 m3 in volume? The density of gold is 19.3 g/cm3."
Write your answer to 3 significant figures
Answers
Answer:
The volume of an object is the amount of space it takes up. In this question, we know that the volume of the gold bar is 7.379 x 10^-4 m^3. We also know that the density of gold is 19.3 g/cm^3. To calculate the mass of the bar, we need to multiply the density of gold by the volume of the bar. The mass will be in grams.
Density = mass / volume
mass = density * volume
mass = (19.3 g/cm^3) * (7.379 x 10^-4 m^3)
mass = (19.3 g/cm^3) * (7.379 x 10^-4 m^3) * (10^6 cm^3/m^3)
mass = 140.4 g
So the mass of the gold bar is 140.4 g (rounded to 3 significant figures)
Ethanol is a common laboratory solvent and has a density of 0.789 g/ml. What is the mass, in grams, of 143 ml of ethanol?
Answers
143 millilitres of ethanol have a mass of 113.397 grammes.
What is ethanol?The volatile, transparent liquid ethanol, usually referred to as ethyl alcohol, is frequently employed as a solvent in lab settings. It has a density of 0.789 grammes per millilitre and the chemical formula C2H5OH, making it an organic substance.
How do you determine it?We can determine the mass of a given volume of a substance since its density is defined as its mass per unit volume.
We only need to multiply the density by the volume of the ethanol to determine its mass, which is 143 millilitres. This calculation's formula is:
Volume times Density = Mass
When we enter the ethanol values, we obtain:
mass = 143 ml x 0.789 g/ml = 113.397 g
Therefore, 143 millilitres of ethanol have a mass of 113.397 grams.
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D) All atoms of a given element must 3. Which statement concerning elements is true? A) electron and neutron B) electron and positron C) proton and electron D) proton and neutro nir mass unit?c
Answers
'Protons and neutrons' is the true statement concerning elements.
What is proton and neutron ?
Protons are positively charged particles with a mass of approximately 1 amu. These positively charged particles are present in the Centre of the atom in the nucleus. Neutrons are electrically neutral particles which have the same mass as a proton.
Protons: Positively charged subatomic particles that reside in the nucleus. Neutrons: Neutrally charged subatomic particles that reside in the nucleus. Electrons: Negatively charged subatomic particles found in the electron shells surrounding the nucleus.
A neutron is a subatomic particle found in the nucleus of every atom except that of simple hydrogen. The particle derives its name from the fact that it has no electrical charge; it is neutral.
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How many moles of CaSO4 are required to produce 128 g of SO2? 3CaSO4 + CaS → 4CaO + 4SO2
Answers
2 moles of CaSO4 are required to produce 128 g of SO2 in 3CaSO4 + CaS → 4CaO + 4SO2 in this equation.
What do you mean by mole ?The term mole is defined as a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.
1 mole = 6.023 × 10²³ molecules
The balance equation is as follows:
3CaSO4 + CaS → 4CaO + 4SO2
1 mole = 6.023 × 10²³ molecules
1 mole SO₂ = 6.023 × 10²³ molecules
128 mole = ?
Molar mass of SO₂ = 64 gram
The numbers of moles in 128 gram SO₂ = 1 / 64 ×128
= 2 moles
Thus, 2 moles of CaSO4 are required to produce 128 g of SO2.
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A chemist must prepare 775.mL of 140.mM aqueous silver nitrate AgNO3 working solution. She'll do this by pouring out some 0.386M aqueous silver nitrate stock solution into a graduated cylinder and diluting it with distilled water.Calculate the volume in mL of the silver nitrate stock solution that the chemist should pour out. Round your answer to 3 significant digits.
Answers
The volume in mL of the silver nitrate (AgNO₃) stock solution that the chemist should pour out is 281 mL.
Volume (V₁) = 775 mL
Molarity (M₁) = 140 mM = 140 / 1000 = 0.140 M
Molarity (M₂) = 0.386 M
Volume (V₂) = ?
By the formula,
M₁V₁ = M₂V₂
V₂ = (M₁V₁)/M₂
Substitute the values to obtain volume (V₂),
V₂ = (0.140 M × 775 mL)/0.386 M
⇒ V₂ = 108.5/0.386
⇒ V₂ = 281.0 mL
Hence, the volume in mL of the silver nitrate (AgNO₃) stock solution that the chemist should pour out is 281 mL.
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What is the density of copper if 4.80 cm³ has a mass of 43.0 g? Please report your answer to the correct
amount of significant figures.
g/cm³
Answers
Answer: d = 0.958 g/cm³
Explanation:
Density = mass/volume
d = g/cm³ or d = g/mL
Note: cm³ = mL
d = 43.0 g/4.80 cm³
d = 8.96 g/cm³
Three significant figures are in the final answer since there are three significant figures in 4.80 cm³ and 43.0 g.
determining the exact age of a fossil by using carbon dating and half-life
Answers
Answer:
you need to multiply your number of half-lives by how many years are in one half-life. This gives you an age of 2 x 5730 = 11,460 years. Your fossil is of an organism (maybe human) that died 11,460 years ago
Explanation:
Calculate and record the following data in the table. Name Propane Butane Methane
Molar volume (L/mol) _____ _____ _____
Average molar volume (L/mol) _______________________
Propane molar volume: ______ L/mol butane molar volume: ______ L/mol
Answers
The molar volume and average molar volume of propane, butane, and methane at STP are 24.45 L/mol , 24.93 L/mol ; 28.02 L/mol , 24.93 L/mol and 22.41 L/mol , 24.93 L/mol respectively.
The molar volume of a gas is defined as the volume occupied by one mole of gas at standard temperature and pressure (STP), which is defined as 0°C and 1 atm.
The molar volume of a gas can be calculated using the ideal gas law,
PV = nRT,
where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature in kelvins.The molar volumes of propane, butane, and methane at STP can be calculated as follows:
Propane: C₃H₈
At STP (0°C and 1 atm), the molar volume of propane can be calculated as:
V = (nRT) / P
V = (n x 0.0821 x (273.15 + 0) / 1) / 1
V = 24.45 L/mol
Butane: C₄H₁₀
At STP (0°C and 1 atm), the molar volume of butane can be calculated as:
V = (nRT) / P
V = (n x 0.0821 x (273.15 + 0) / 1) / 1
V = 28.02 L/mol
Methane: CH₄
At STP (0°C and 1 atm), the molar volume of methane can be calculated as:
V = (nRT) / P
V = (n x 0.0821 x (273.15 + 0) / 1) / 1
V = 22.41 L/mol
The average molar volume is the sum of the molar volumes divided by the number of gases:
Average molar volume = (24.45 + 28.02 + 22.41) / 3
Average molar volume = 24.93 L/mol
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choose the word that matches each definition. : a chip that executes the instructions within a device, sometimes referred to as the brains of the computer : broke the enigma code in world war ii : a glass tube containing electrodes used as a switch to produce on or off signals for the computer
Answers
The definitive word for each of the given sentences is as follows:
A chip that executes the instructions within a device sometimes referred to as the brains of the computer: MicroprocessorBroke the enigma code in World War II: Alan TuringA glass tube containing electrodes is used as a switch to produce on or off signals for the computer: Vacuum Tube.A microprocessor is a compact and integrated chip that contains the central processing unit (CPU) of a computer. Alan Turing was a British mathematician and computer scientist who played a crucial role in breaking the German Enigma code during World War II. A vacuum tube, also known as a valve, is an electronic component consisting of a glass or metal tube with electrodes sealed inside.
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Answer:
cpu , al , vaccum tube
Explanation:
100% on edge
How many MOLES of carbon tetrachloride are present in 3.70 grams of this compound ?
Answers
Answer: there are 0.024 moles of CCl4 present in 3.70 grams of this compound
Explanation: To determine the number of moles of a compound present in a given mass, we can use the formula:
moles = mass / molar mass
where molar mass is the mass of one mole of the compound and is measured in g/mol.
The molar mass of carbon tetrachloride (CCl4) is 153.82 g/mol.
So to find the number of moles of CCl4 present in 3.70 grams, we can plug in the values into the formula:
moles = 3.70 g / 153.82 g/mol
moles = 0.024 mol
Therefore, there are 0.024 moles of CCl4 present in 3.70 grams of this compound.
Which of the following is the strongest intermolecular force? - hydrogen bonding
- dipole-dipole attractions
- dispersion forces
- covalent bonding
Answers
The strongest intermolecular force is hydrogen bonding.
Ionic bonds and covalent bonds are atomic bonds, meaning they are intramolecular. They are generally stable and relatively irreversible.
Hydrogen bonds, dipole-dipole interactions, and van der Waals forces (London dispersion forces) are some common examples of intermolecular forces. Intermolecular forces will never change the identity of the molecule and cannot be used to add atoms to a compound.
The strongest intermolecular force is hydrogen bonding, which is a particular subset of dipole-dipole interactions that occur when hydrogen is in close proximity to a highly electronegative element. The hydrogen takes on a partial positive charge and the electronegative atoms take on a partial negative charge.
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A marshmallow has an initial volume of 0.068 L at standard pressure (1.0
atm). If the marshmallow is placed in a vacuum chamber and the final
volume is 0.296L, what is the pressure inside the chamber?
Answers
Answer: 0.232 atm
Explanation:
The pressure inside the chamber can be calculated using the Ideal Gas Law, which states that PV = nRT.
P = pressure (atm)
V = volume (L)
n = number of moles (assumed to be constant)
R = gas constant (0.0821 L·atm/mol·K)
T = temperature (K)
Since we know the initial and final volume of the marshmallow, we can use the equation:
(P1)(V1) = (P2)(V2)
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
We can plug in the given information:
(1.0 atm)(0.068 L) = (P2)(0.296 L)
Solving for P2, we get:
P2 = (1.0 atm)(0.068 L) / (0.296 L) = 0.232 atm
So the pressure inside the chamber is 0.232 atm.
Construct a response below where you answer the following questions and explain the photosynthesis process. a. What special structures within a plant help it during photosynthesis? b. What energy conversion occur during photosynthesis? Make sure to use the following words in your explanation: water, light energy, glucose, carbon dioxide and oxygen
Answers
Photosynthesis is a process by which plants produce their own food using light energy, carbon dioxide, and water. The special structures within a plant that help it during photosynthesis are called chloroplasts. These chloroplasts are found within the mesophyll cells of leaves and contain chlorophyll, which absorbs light energy from the sun.
What is photosynthesis?Generally, During photosynthesis, light energy is converted into chemical energy by the chlorophyll within the chloroplasts. Water is taken in by the roots and transported to the leaves where it is used in the process. Carbon dioxide from the air is also taken in through tiny pores called stomata on the leaves.
The light energy from the sun is used to split the water molecules into hydrogen and oxygen, releasing oxygen into the air as a byproduct. The hydrogen ions are then combined with carbon dioxide to form glucose, which is the plant's food source.
In summary, the photosynthesis process converts light energy, water, and carbon dioxide into glucose and oxygen. This process is essential for the survival of plants and also provides the basis of the food chain for all living things.
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given two variables ival and fval, containing respectively an integer and a float value, write a statement that writes both of their values to standard output in the following format: i
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To write both values of ival and fval to standard output in the specified format, you can use the following code snippet:
#include <iostream>
int main() {
int ival = 5;
float fval = 2.4;
std::cout << "i: " << ival << ", f: " << fval << std::endl;
return 0;
}
This code snippet will output the following:
i: 5, f: 2.4The code snippet provided above is a simple example of how to write two values to standard output in the specified format. However, there are many other ways to achieve the same result. For example, you could use the C++ iomanip library to control the formatting of the output. Additionally, the same code can be written in other programming languages such as Python, Java, and JavaScript.
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How many significant figures are in the following 1,266.9-4,633.1
