Answer:
36 grams
Explanation:
Write word equation as a chemical equation:
When chlorine gas is added to an aqueous solution of potassium iodide, the reaction yields solid iodine and an aqueous solution of potassium chloride
Answer:
Here's the chemical equation:
Cl2 + KI → KCl + I2
Cl2(g)+2KI(aq)→I2(s)+2KCl(aq)
1
2
3
6
8
g
10
Which two pieces of fossil evidence support the idea of continental drift?
bacteria and petrified wood
O Glossopteris and bacteria
O Lystrosaurus and Glossopteris
O petrified wood and Tyrannosaurus
Lystrosaurus and Glossopteris are two pieces of fossil evidence support the idea of continental drift.
One of the geologist's first theories about how continents moved over time was continental drift. The science of plate tectonics has been largely supplanted the hypothesis of the continental drift. Alfred Wegener has been most closely associated with the continental drift idea. Wegener released a paper in the early twentieth century describing his notion that continental landmasses were "drifting" across the Earth, occasionally ploughing through seas and into one other. He developed the term "continental drift" to describe this process.
Wegener found similarities in the coasts of eastern South America as western Africa and hypothesised that those countries had originally been part of a supercontinent called Pangaea, which had separated and travelled many kilometres away over geologic time. He also mentioned nearly comparable fossil creatures and rock layers that happened on vastly different continents. Colbert discovered Lystrosaurus fossils in the Transantarctic Mountains of Antarctica. Such fossils belonged to something like a species previously discovered in Africa, proving that the world's two most distant continents were formerly linked.
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Answer: C. Lystrosaurus and Glossopteris
Explanation:
Name the following alkyne. Be sure to use hyphens (-) not endashes (-).
2,2-Dimethylbut-1-yne .The alkyne name is formed using the IUPAC nomenclature system.
First, the length of the longest continuous carbon chain (containing the triple bond) must be identified. In this case, it is a four-carbon chain (but-).
Second, the location of the triple bond must be determined. In this case, it is located on the first carbon atom so the prefix 1- is used.
Third, the substituents must be listed in alphabetical order. In this case, there are two methyl groups (2,2-dimethyl).
The final name is 2,2-Dimethylbut-1-yne.
2,2-Dimethylbut-1-yne .The alkyne name is formed using the IUPAC nomenclature system.
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a sample of lithium goes through a temperature change of +44.1°C while absorbing 713.5 joules of heat. the specific heat capacity of lithium is 3.58J/(g°C). What is the mass of this sample
Answer choices:
4.52 g
199 g
0.22 g
16.2 g
Answer:
Mass of lithium = 0.22 gram (Approx.)
Explanation:
Given:
Change in temperature Δt = 44.1 °c
Absorbing heat Q = 713.5 joules
Specific heat capacity of lithium c = 3.58 J/(g°C)
Find:
Mass of lithium
Computation:
We know that;
Q = mcΔt
m = cΔt / Q
Mass of lithium = (3.58)(44.1) / (713.5)
Mass of lithium = (157.878) / (713.5)
Mass of lithium = 0.2212
Mass of lithium = 0.22 gram (Approx.)
why the bond between hydrogen and oxygen in a water molecule is more polar than the bond between hydrogen and nitrogen in an ammonia molecule.
Since oxygen has a higher electronegative charge than hydrogen, the two bonds that are created will be polar covalent, which means that oxygen.
which has a higher electronegative charge, will have a partial negative charge, and hydrogen, which has a partial positive charge. Each water molecule has a small hydrogen charge that attracts neighboring oxygen atoms and negatively charged areas of other molecules. While holding water together and giving it intriguing features, the hydrogen bond between the hydrogen of one water molecule and the oxygen of another... For water, this is how it functions. Due to the molecule's bent structure, water (H 2 O) is polar. Most of the negative charge from the oxygen is indicated by the shape.
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Which of the following is a physical property of minerals?
Answer:
Below
Explanation:
You didn't list any choices but stuff life color, density, texture,hardness, luster are PHYSICAL properties
Benzene (C6H6) burns in air to produce carbon dioxide and liquid water. How much heat is released per mole of benzene combusted? The standard enthalpy of formation of benzene is 49.04 kJ/mol
Benzene (C6H6) burns in air to produce carbon dioxide and liquid water.The heat released in KJ per gram of the compound reacted with oxygen is -41.83 KJ.
What is heat ?
Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.
The movement of minuscule atoms, molecules, or ions in solids, liquids, and gases produces heat energy. From one thing to another, heat energy can be exchanged. Heat is the flow or transfer that occurs as a result of the temperature differential between two objects.
Reaction as follows;
2C6H6 + 15O2 → 12CO2 + 6H2O
2x49.04 2x10 12x-393.5 6x-285.8
= [ 12(-393.5 )+6(-285.8) ] - [ 2(49.04)+(2x10) ]
= - 6936.8 - 98
= - 6534.8 KJ/mole
Per gram of benzene
= ( -6534.8 KJ / 2 mole of C6H6) (1 mole of C6H6 / 78.108g )
= -41.83 KJ / mole
Thus, The heat released in KJ per gram of the compound reacted with oxygen is -41.83 KJ.
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You just created the equality 1 fluid oz = 29. 7 mL. Use this equality to determine how many ounces of water will be measured using the measuring cup introduced before Part A when making the cake.
Express your answer numerically in ounces to two significant figures
2 ounces of water will be measured using the measuring cup introducing before part A when making the cake.
Both units (that is, ml and ounces) are equal, meaning they measure the same quantity and can be converted to each other.
Given that:
1fluid oz = 29.7ml
Part A measurements are not shown. Therefore, we will explain using hypothetical values.
Let the amount of water measured with the measuring cup in part A be 10 ml.
The equivalent number of ounces (x) is calculated as follows:
1 fluid oz = 29.7ml
x = 10ml
By using equality
x * 29.7ml = 1 fluid oz * 10ml
By canceling common units
x * 29.7 = 10 fluid oz
Divide both sides by 29.7.
x = 0.3367 fluid oz
Approximate to the nearest half.
x = 0.5 fluid oz
This means that the equivalent amount of water is 0.5 ounces.
What if the measurement is 55mL.
We apply the same steps here also:
x fluid oz = 55ml
x *29.7 = 1 fluid oz * 55 ml
Divide both sides by 29.7
x = 2 fluid oz
This means that the equivalent amount of water is 2 ounces.
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What is the mass of a sample of NH3 containing 6.3 x 1024 molecules of NH3?
O 157 grams
O 178 grams
O 182 grams
198 grams
Answer:
178 grams
Explanation:
Took Test
The mass of a sample of NH3 containing 6.3× 10²⁴ molecules of NH₃ is 178 gm , i.e. Option B
What is a mole ?A mole is defined as 6.022 × 10²³ atoms, molecules, ions, or other chemical units.
and the molar mass of a substance is defined as the mass of 1 mole of that substance, expressed in grams per mole.
It is equal to the mass of 6.022 × 10²³ atoms, molecules, or formula units of that substance.
6.022× 10²³ molecules are present in 1 mole
6.3× 10²⁴ molecules will be present in
[tex]\rm =\dfrac{6.3\times 10^{24}}{6.022\times 10^{23} } \;moles[/tex]
= 10.46 moles
Molar mass(1 mole) of NH₃ is 17 gm
10.46 moles will have mass of 10.46* 17 = 178 gm
The mass of a sample of NH₃ containing 6.3× 10²⁴ molecules of NH₃ is 178 gm , i.e. Option B.
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What do i do if i smell gas inside of the house?
Answer:
open the windows, turn off all electronics (take out all of the plugs), then find where the gas is coming from.
Explanation:
What do these two changes have in common?
a slice of banana turning brown
acid rain weathering a marble statue
Select all that apply.
Both are only physical changes
Both are only chemical changes
Both are caused by heating
Both are caused by cooling
Answer:
both are only physical changes
Answer:both are only chemical
Explanation:
A beautyberry is a type of shrub that grows well in the southern United States. Some students have a small beautyberry shrub that is growing near their school. They record the number of berries, ripe or unripe, and the number of flowers at different times throughout the year.
Table. Column headings. Month, ripe berries, unripe berries, flowers. September, 9, 4, 2. October, 5, 10, 4. November, 5, 7, 3. December, 2, 3, 1. February, 3, 2, 0. March, 6, 11, 5. April, 12, 5, flowers 9. June, 3, 8, 2.
Which statement best explains what is shown in their data?
Choose the correct answer.
Responses
A.The beautyberry relies on wind to spread its seeds.
B..The beautyberry relies on one type of animal to eat the berries.
C.The beautyberry uses asexual reproduction to make new plants.
D.The beautyberry increases its chances of reproduction because its berries do not all become ripe at the same time.
Note that statement best explains what is shown in the above-tabularized data is: "The beautyberry increases its chances of reproduction because its berries do not all become ripe at the same time. (Option D)
What is the rationale for the above answer?The statistics in the above table appear to reflect the ripening of berries and the number of blossoms of a plant, presumably called beautyberry. It can be noticed that the amount of ripe berries and blossoms varies each month.
This implies that the beautyberry does not produce all of its berries at once, but rather over the course of several months. This might boost the odds of reproduction by providing a food supply for animals and birds for a longer length of time.
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What is the relationship between the enthalpy (AH) and entropy (AS) of a
reaction that is never spontaneous?
OA. +AH,-AS
OB. -AH, +AS
OC. -AH-AS
OD. +AH, +AS
SUBMIT
The relationship between the enthalpy (ΔH) and entropy (ΔS) of a reaction that is never spontaneous is -ΔH, +ΔS option - B is correct answer.
A spontaneous reaction is what?When a reaction occurs spontaneously, the system doesn't require any additional energy input because the change in free energy is negative.
When the enthalpy change is negative and the entropy change is positive, the reaction is always spontaneous.
The free energy change is always positive and the reaction is never spontaneous if the reaction is endothermic (H positive) and the entropy change S is negative (less disorder).
Although a spontaneous reaction may result in an increase or decrease in entropy or enthalpy, it will always result in a decrease in free energy, which is a negative G.
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Do you multiply grams to moles?
How does oxygen affect orcas?
The orcas will compensate the lack of the oxygen that being respired for the minute at time and with the high amount of the hemoglobin in the blood.
The orcas will be able to slow down their heart beat when they are diving . this will decrease the amount of the oxygen demand but this not good for them it will be very stressful on their body.
The hemoglobin will increase the efficiency of their respiration. The orcas are the sea mammals . the orcas will be dive for the long period of the time in to the water. They will easily breathe through blowhole.
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A compound is composed of carbon and hydrogen and has an empirical
formula of CH. The molar mass of the compound is experimentally
determined to be 78.12 g/mol. What is the molecular formula for the
compound?
The empirical formula for the given compound is C6H6.
What is empirical formula?The molecular formula represents the precise digits of the atoms found in the given molecule of the compound, whereas the empirical formula represents the proportional of the atoms found in the provided compound.
How empirical formula calculated?The empirical formula defines the individual atoms that make up a species in the simplest whole number ratio possible. The
The empirical formula is always multiplied by the molecular formula.
Given the foregoing, the empirical formula for the molecular formula is n.
Because of this, the molecular formula is: 78.0 g m o l 1 = n ( 12.011 + 1.00794 ) g m o l 1
n \s= \s78 \s12.011 \s+ \s1.00794 =6 \s .
And the chemical formula is C 6 H 6.
Molecular formula, although not always.≡
empirical formula, which includes the multiple n=1 \s .
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What volume (in L) of nitrogen will be produced from the reaction of 6. 8 L of carbon monoxide?
2CO(g)+2NO(g)>N2(g)+2CO2(g)
The volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide is 3.7 L
In order to determine the volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide, we need to use the balanced equation for the reaction:
2CO(g) + 2NO(g) -> N2(g) + 2CO2(g)
From the equation, we can see that for every 2 moles of CO that react, 1 mole of N2 is produced. The volume of a gas is directly proportional to the number of moles of the gas present.
If the initial volume of CO is 6.8 L, we can assume that the number of moles of CO is
6.8 L / 24.45 L/mol = 0.278 mol.
Therefore, the number of moles of N2 produced would be
0.278 mol CO * (1 mol N2 / 2 mol CO) = 0.139 mol N2.
Finally, using the ideal gas law PV = nRT (where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature), we can calculate the volume of N2 produced:
V = nRT / P
V = 0.139 mol N2 * (8.314 J/mol*K) * (273 K) / (1 atm) = 3.7 L
So, the volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide is 3.7 L.
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according to the department of transportation hazardous materials are defined as
Hazardous materials are substances or chemicals that pose a health hazard, a physical hazard, or harm to the environment.
What is hazardous materials?Weapons of mass destruction, as well as other matter or energy that have the potential to do harm to people, the environment, and property, when discharged.The EPA divides hazardous waste into three categories: listed, characteristic, and mixed radiological waste. Although there are numerous subclasses within each of these groups, the following are the broad groupings.Any cause of potential danger, harm, or negative health impacts on something or someone is a hazard. Basically, a risk is the potential for harm or a negative outcome (for example, to people as health effects, to organisations as property or equipment losses, or to the environment).A hazard is a potential source or circumstance that could cause harm to people or their health, damage to property, or harm to the environment.
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What is the concentration of the hydroxide ion? Given that the concentration of the hydronium ion is 2.3 X 10^-7 M
Answer:
4.35 * 10^-8 M
Explanation:
Since the concentration of the hydronium ion= 2.3 X 10^-7 M
And we know that;
[H3O^+] [OH^-] = 1 * 10^-14
[H3O^+] = concentration of the hydronium ion
[OH^-] = concentration of the hydroxide ion
So;
[OH^-] =1 * 10^-14/[ H3O^+]
But [H3O^+] = 2.3 X 10^-7 M
[OH^-] = 1 * 10^-14/2.3 X 10^-7
[OH^-] = 4.35 * 10^-8 M
Which statement best describes an electron going from shell 1 to shell 3 as shown in the picture below?
1. The electron is changing into a neutron
2. The electron is moving from one atom to another atom
3. The electron is moving from an excited state to its ground state
4. The electron is moving from its ground state to an excited state
Answer:
the electron is moving from one atom to another
the safety air bag in automobiles are inflated by nitrogen gas by the rapid decomposition of sodium azide:
sodium azide (NaN3) is used to inflate the safety airbags in automobiles (g) This airbag should be filled with N2 at a pressure of 1.15 atm and temperature of 26.0°C. It has a volume of 36 L.
Modern automobiles use numerous technical components and subsystems, each of which performs a specific design function. Some of these have thousands of individual pieces and were made possible by new or improved technologies, such as electronic computers, high-strength polymers, and novel alloys of steel and nonferrous metals. Air pollution, safety regulations, and global manufacturer competition, among other things, have all contributed to the development of some subsystems.
With an estimated 1.4 billion in use worldwide, passenger vehicles have become the main form of family transportation. In the United States, where more than three trillion miles (almost five trillion kilometers) are traveled annually, roughly one-fourth of these are located.
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. Which one is formed by the combination of many tissues?
Answer:
organs is the right answer
Explanation:
An organ is a structure that is composed of at least two or more tissue types and performs a specific set of functions for the body. Many organs working together to accomplish a common purpose is called an organ system.
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For which d orbital(s) do the lobes point directly at the ligands in a square-planar crystal field? Check all that apply.
O dzy
O dz2
O dzz
O dzy y^2
O dyz
submit
The dz2 and the dx2-y2 orbitals have lobes that point directly at the ligands in a square-planar crystal field in d orbitals.
The d orbitals are a set of atomic orbitals found in the second energy level (n = 2) of an atom. They have a higher energy than the s and p orbitals in the first energy level (n = 1), and are represented by the letters d, dx, dy, dz and dxy, dxz and dyz.The d orbitals are composed of four orbitals which are degenerate (having the same energy) in an isolated atom. But when an atom is in a compound, the d-orbitals split into different energy levels due to the influence of the electrostatic forces of the neighboring atoms. This is called the crystal field splitting, which depends on the symmetry of the crystal and the coordination number of the central atom.
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8. What is the kinetic energy of a 0.02 kg bullet that is traveling 300 m/s? Express your answer in joules.
Which action characterized Earth's earliest atmosphere (atmosphere I) ?
Helium and hydrogen gases escaped earth's gravity.
Increased oxygen allowed reptiles to thrive.
Heat energy was retained and water vapor condensed.
Ultraviolet light split water vapor into hydrogen and oxygen
The action "Heat energy was retained and water vapor condensed." characterized Earth's earliest atmosphere (atmosphere I)
Earth's earliest atmosphere, also known as atmosphere I, was primarily composed of methane, ammonia, and water vapor. The heat energy from the young Earth's molten surface caused these gases to rise and cool, leading to the condensation of water vapor and the formation of oceans. This process is known as the "greenhouse effect," as the retained heat energy allowed for the formation of a hospitable environment for the emergence of life. Ultraviolet light from the sun also played a role in the formation of the atmosphere by breaking down water vapor into hydrogen and oxygen, but this was not the primary process that characterized atmosphere I.
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different between ionic and metallic bond
Answer:
Whereas ionic bonds join metals to non-metals, metallic bonding joins a bulk of metal atoms.
Explanation:
hope this helps
Chlorine dioxide, ClO2, si a reddish-yellow gas that is soluble in water. In basic solution it gives ClO3- and ClO2- ions. 2ClO2(aq) + 2OH-(aq) ?
ClO3-(aq) + ClO2- (aq) + H2O. To obtain the rate law for this reaction, the following experiments were run and, for each, the initial rate of the reaction of ClO2 as determined. Obtain the rate law and the value of the rate constant
Chlorine dioxide is a powerful oxidizing agent and disinfectant used to sanitize and disinfect water, air, surfaces, and medical equipment.
What is Chlorine?
Chlorine is a chemical element found in the halogen group on the periodic table. It has the atomic symbol Cl, and its atomic number is 17. Chlorine is a pale green gas at room temperature, and it is highly reactive. Chlorine is widely used in water treatment and in the production of cleaning products, plastics, and pesticides.
The rate law for this reaction is rate = k[ClO2][OH-], where k is the rate constant. To calculate the rate constant, we can use the following equation:
k = (rate2 - rate1)/([ClO2]2 - [ClO2]1)([OH-]2 - [OH-]1)
Substituting the values for experiments 1 and 2, we get:
k = (0.00276 - 0.0248)/((0.020 - 0.060)(0.030 - 0.030)) = -0.142
The value of the rate constant is k = -0.142 mol/((L s)mol2).
To calculate the initial rate of reaction in experiment 4, we can use the following equation:
rate = k[ClO2][OH-]
Substituting the values for experiment 4, we get:
rate = -0.142(0.040)(0.060) = -0.0043 (mol/((L s))
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What are the composite units of each type of solid? What types of forces hold each type of solid together? Match the items in the left column to the appropriate blanks in the sentences on the right. Reset Help nonbonding Molecular solids are those solids whose composite units are together by the following kinds of intermolecular forces: Molecular solids are held bonding coulombic forces and hydrogen lonic solids are those solids whose composite units are Ionic solids are held together Individual atoms by dispersion forces network covalent dispersion forces, dipole- dipole forces Atomic solids are those solids whose composite units are Atomic solids can themselves bo divided into three following categories, where each is held together by a different kind of force. The first category, which includes only the noble gases in their solid form and is held together by relatively weak atomic solids. The second category, which is held together by bonds and includes such examples as copper or silver, is atomic solids. The last category, which is hold together by and includes such examples as diamond, graphito, and silicon dioxide, is atomic solids ions metallic molecules covalent bonds lon-dipole forces
Solids known as molecular solids are made up of molecules. Intermolecular forces such as hydrogen bonds, dipole-dipole forces, and dispersion forces hold together molecular solids. Solids with ions as their constituent parts are known as ionic solids. Ion-dipole forces keep ionic solids together.
Atomic solids are those whose constituent atoms make up their entire structure. Atomic solids can be broken down into the three categories below, each of which is held together by a distinct set of forces. Dispersion forces atomic solids is the first category, which only consists of noble gases in their solid states and is held together by coulombic forces that are comparatively weak. Metallic atomic solids fall under the second category, which is held together by nonbonding bonds and contains substances like copper and silver as examples. Network covalent atomic solids are the final group of materials that are held together by covalent bonds and include materials like silicon dioxide, graphite, and diamond.
What five intermolecular forces exist?Intermolecular forces can be divided into three categories: hydrogen bonds, dipole-dipole interactions, and London dispersion forces (LDF). Despite the fact that molecules can have any combination of these three types of intermolecular forces, all substances at least have LDF.
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PLEASE HELP! 50 PTS! WILL GIVE BRAINIEST!!!
Answer:
Explanation:
C ADBBECDEAAnswer:
1 - C
2 - A
3 - D
4 - B
5 - B
6 - E
7 - C
8 - D
9 - E
10 - A
Explanation:
Write the expression for the solubility product constant for:Ca3(PO4)2 (s) 3Ca2+ (aq) + 2PO43- (aq)
The solubility product constant (Ksp) for a substance is the equilibrium constant for the reaction between the dissolved ions of the substance and its solid form. In the case of Ca3(PO4)2, the equation for the reaction in water is: Ca3(PO4)2 (s) ↔ 3Ca2+ (aq) + 2PO43- (aq)
The solubility product constant, Ksp, for this reaction is represented by the equation:
Ksp = [Ca2+]^3 * [PO43-]^2Where [Ca2+] represents the concentration of calcium ions in molarity and [PO43-] represents the concentration of phosphate ions in molarity.
Solubility refers to the maximum amount of a substance that can dissolve in a given solvent at a given temperature and pressure. For example, the solubility of sugar in water is the maximum amount of sugar that can dissolve in water at a given temperature and pressure. The solubility of a substance can be influenced by temperature, pressure, and the presence of other dissolved substances.
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