A binary covalent bond exists between 2 nonmetals.
These compounds are termed similarly to binary ionic compounds even though they don't contain ions.
These guidelines apply to the nomenclature of binary covalent compounds:
The complete name of the first element in the formula is given first.
The name of the second element refers to it as an anion.
Prefixes are employed to indicate the number of atoms in a compound. The prefix mono- is dropped if the first element only has one atom.
For instance, carbon monoxide is the name given to CO rather than monocarbon monoxide.
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Human population growth in 2018 was 1. 7%. If this rate of growth remains constant, in what year will the human population double?
Human population growth will Double time and that will be 41.17 years
Human growth can be defined as;
The growth and development are positively influenced by factors, like parental health and genetic composition.
Population growth is the increase in the number of humans on Earth.
Human population has grown exponentially over the past century. It has done so largely by producing large amounts of food, and learning how to control disease.
We can find what year the human population would double using the rule of 70. This is given as;
Double time = 70 / rate(r)
Double time = ?
Rate = 1.7%
Inserting into the equation;
Double time = 70 / 1.7
Double time =41.17 years
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2CH4O + 3o2 = 2CO2+ 4H20 (1)
ΔΗ =-726 kj
How many kilojoules are released when 75 g of CH4O Reacts?
The amount of heat released when 75 g of CH4O reacts is -1705.64 kJ.
The equation given is the balanced equation for the combustion of methanol (CH4O) with oxygen to form carbon dioxide (CO2) and water (H20). The value of ΔΗ given (-726 kJ) is the enthalpy change for the reaction, which represents the amount of heat released or absorbed when the reaction occurs.
To calculate the amount of heat released when 75 g of CH4O reacts, we need to use the equation: q = n x ΔΗ where,
q is the heat releasedn is the number of moles of CH4O reacting ΔΗ is the enthalpy change for the reaction.We know that the molar mass of CH4O is 32.04 g/mol, so we can convert 75 g to moles using the following formula: n = m/M where,
n is the number of molesm is the mass of CH4O M is the molar mass of CH4O.So, n = 75 / 32.04 = 2.34 moles
Using this value of n in the equation above, we can calculate the heat released as q = 2.34 x -726 = -1705.64 kJ
Therefore, -1705.64 kJ of heat is released when 75 g of CH4O reacts.
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4. Markeith found several fossils and decided to use Carbon-14,
which has a half-life of 5,730 years, to measure the age. How old is
each rock? Please help
b. A fossil that has 6. 25 % of its carbon atoms still
unstable?
C. A fossil that has 75% of its atoms STABLE?
A fossil that has 6.25% of its carbon atoms is still unstable.
Carbon-14 dating is a method of determining the age of organic material. Measures the amount of carbon-14 (a radioactive isotope of carbon) present in the sample. The half-life of carbon-14 is 5,730 years. This means that after 5,730 years, half of the carbon-14 atoms in the sample have decayed to nitrogen.
If 6.25% of the fossil carbon atoms are unstable, this means that 93.75% of the carbon-14 atoms in the sample have already decayed. To determine the age of a fossil, the following formula can be used:
Age = (half-life x ln(1-(fraction of decayed carbon-14/100))) / ln(2)
Age = ( 5,730 x ln(1 - (93.75/100))) / ln(2)
age = 11,460 years old
c. A fossil in which 75% of the atoms are STABLE.
If 75% of the fossil atoms are STABLE, this means that 25% of the carbon-14 atoms in the sample have decayed. The same formula as above can be used to determine the fossil age. 75 )) / ln(2)
Age = 23,120 years
Please note that these are approximate values, as the actual age of the fossils may be affected by various factors such as contamination, preservation, and measurement error.
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200. 00 grams of an organic compound is known to contain 83. 884 grams of carbon, 10. 486
grams of hydrogen, 18. 640 grams of oxygen and the rest is nitrogen. What is the
empirical formula of the compound?
An empirical formula is a type of chemical formula that shows the simplest ratio of elements present in a compound, rather than the total number of atoms.
What are Atoms?
Atoms are the smallest indivisible particles that make up all matter in the universe. They consist of a nucleus containing protons and neutrons, surrounded by a cloud of electrons. Atoms make up all elements, which are the building blocks for all other forms of matter.
Step 1: Calculate the atomic mass of carbon, hydrogen, oxygen, and nitrogen.
Carbon: 12.011 g/mol
Hydrogen: 1.008 g/mol
Oxygen: 15.999 g/mol
Nitrogen: 14.007 g/mol
Step 2: Convert the mass of each element to moles.
Carbon: 83.884 g / 12.011 g/mol = 6.983 mol
Hydrogen: 10.486 g / 1.008 g/mol = 10.381 mol
Oxygen: 18.640 g / 15.999 g/mol = 1.164 mol
Nitrogen: (200.00 g - (83.884 g + 10.486 g + 18.640 g)) / 14.007 g/mol = 6.871 mol
Step 3: Divide each mole value by the smallest mole value to obtain the simplest whole number ratio.
Carbon: 6.983 mol / 6.983 mol = 1
Hydrogen: 10.381 mol / 6.983 mol = 1.485
Oxygen: 1.164 mol / 6.983 mol = 0.167
Nitrogen: 6.871 mol / 6.983 mol = 0.985
The empirical formula of the compound is CHNO.
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Which one of the following compounds behaves as an acid when dissolved in water?
O CH3OCH3
O KOH
O H2SO3
O CH4
H2SO3, or sulfuric acid, is a compound that behaves as an acid when dissolved in water. The other compounds listed are either bases, alkanes, or ethers and are not acidic when dissolved in water.
H2SO3, or sulfuric acid, is a compound that behaves as an acid when dissolved in water. Acids are compounds that donate protons when dissolved in aqueous solutions, and sulfuric acid is one of the most common acids used in aqueous solutions. Other compounds listed, such as CH3OCH3, KOH, and CH4, are not acids when dissolved in water. CH3OCH3 is an ether, KOH is a base, and CH4 is an alkane. Acids will typically have a pH value less than 7, while bases have a pH greater than 7. H2SO3 is a strong acid with a pH value of around 1, making it the only compound listed that behaves as an acid when dissolved in water.
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A bleaching solution requires 6. 55 g of sodium hypochlorite. How many grams of a 21. 5% by mass solution of sodium hypochlorite should be used
A bleaching solution requires 6. 55 g of sodium hypochlorite. 30.47 grams of a 21. 5% by mass solution of sodium hypochlorite should be used
Mass of sodium hypochlorite = 6.55 g
percent composition = 21. 5%
This indicates that there are 21.5 grams of sodium hypochlorite present in every one hundred grams of solution.
Now calculate the number of grams of solution for 6.55 g of solution.
(6.55 g x 100) / 21.5 g = 30.47 g
Therefore, you will need 30.47 grams of a sodium hypochlorite solution that has a mass concentration of 21.5% in order to obtain 6.55 grams of sodium hypochlorite.
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How does reactivity vary when moving from left to right in third period of modern periodic table?
In the modern periodic table, reactivity increases when moving from left to right in the third period because metallic character decreases along a period.
The elements in the modern periodic table are arranged in 7 periods and 18 groups in a certain manner such that along a period , the metallic character of the element decreases and non-metallic character increases while on moving from top to bottom in a group, the metallic character increases and non-metallic character decreases.
The metallic character of elements depends upon its ability to lose electrons. Along a group, the size of atom increases and gradually the nuclear pull decreases so they can readily lose electrons but across a period, atomic size decreases and nuclear pull increases so they cannot lose electrons easily.
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Propane gas (C3H8) is ignited. Type of reaction ________ ignition ___________________ Balanced chemical equation:
Propane gas (C3H8) is ignited. Type of reaction combustion ignition.
[tex]C_3H_8(g)+5O_2(g) < = > 3CO_2(g)+4H_2O(l)[/tex] Balanced chemical equation.
A balanced chemical reaction is what?A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.
Propene is an alkene because why?The parent chain is the longest chain of carbon atoms that contains the double bond. Its name has the same stem as an alkane with the same number of carbon atoms, but it is designated as an alkene by adding the suffix -ene. Propene is the resultant chemical, CH2=CHCH3.
What does a balanced chemical equation entail?In accordance with the Law of Conservation of Mass, mass cannot be generated or destroyed in a chemical reaction. A balanced chemical equation has an equal number of atoms of each element on the left and right sides of the reaction.
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Compare a nuclear reaction, such as uranium’s alpha particle emission, with a nonnuclear reaction, such as the reaction of sodium with chlorine. What’s the fundamental difference between these two types of reactions?
Be sure to discuss electrons vs nuclear changes and fundamental differences.
A nuclear reaction like α decay takes place in the nucleus of an atom.An element becomes a different element. A chemical reaction like the formation of NaCl involves rearranging the electrons, which are outside the nucleus. The elements are not change. Salt is consists of sodium and chlorine.
What is nuclear reaction ?The splitting of the uranium-235 nucleus when it is blasted with neutrons is a crucial illustration of nuclear fission. This nuclear reaction can result in a number of different compounds.
Nuclear vs Chemical reactions
1. Alpha decay
U₉₂²³⁸ ⇒ He₂⁴ + Th₉₀²³⁴
A nuclear reaction like α decay takes place in the nucleus of an atom.
An element becomes a different element.
2. Chemical reaction
Na· + ·Cl ⟶ Na⁺ + Cl⁻
A chemical reaction like the formation of NaCl involves rearranging the electrons, which are outside the nucleus.
The elements are not change. Salt is consists of sodium and chlorine.
Thus, A nuclear reaction like α decay takes place in the nucleus of an atom.
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Ethanol (C2H5OH) melts a - 144 oC and boils at 78 °C. The enthalpy of fusion of ethanol is 5. 02 kj/mol, and its enthalpy of vaporization is 38. 56 kj/mol. The specific heats of solid and liquid ethanol are 0. 97j/g - k and 2. 3 j/g - K, respectively.
(a) How much heat is required to convert 42. 0 g of ethanol at 35 °C to the vapor phase at 78 °C?
(b) How much heat is required to convert the same amount of ethanol at - 155 oC to the vapor phase at 78 °C?
According to the given statement a) 39.367kJ heat is required AND b) 62.3kJ heat is required.
What are a molar mass and a mole?One mole of a chemical is equal to 6.022 x 1023 particles (or formula units) (ionic compound). The molar mass of a reagent is the amount of 1 mole of that chemical. In put it another way, it gives you the amount of grams per molecule of a material.
Heat required to convert 42.0 g of ethanol at 35 °C to the vapor phase at 78 °C can be calculated by;
H = mcθ + mL
m = mass of ethanol
c = specific heat capacity of ethanol
θ = temperature change
L = Latent heat of vaporization of ethanol
Adding values;
H = (42 × 2.3 × (78 - 35)) + (42/46 × 38.56 × 10^3)
H = 4154 + 35207
H = 39.367 kJ
b) Heat required to convert the same amount of ethanol at - 155°C to the vapor phase at 78 °C;
H = mLfus + mcθ + mLvap
H = (42/46 × 5.02 × 10^3) + (42 × 2.3 × 78 - (- 155)) + (42/46 × 38.56 × 10^3)
H = 4583 + 22508 + 35207
H = 62.3 kJ
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When a hydrogen atom is part of a molecular structure, it is always a ___________ atom. Group of answer choices /-1 Central Terminal
When a hydrogen atom is part of a molecular structure, it is always a terminal atom.
On the periodic table, hydrogen belongs to the group 1 element. Consequently, a hydrogen molecule contains two valence electrons. There are two identical atoms in the H2 molecule. As a result, any atom can be regarded as a centre atom. An atom attached to a central atom is referred to as a terminal atom if it is not H. Here are two illustrations of this differentiation. Add bonding electrons to the total number of electrons. The end of hydrogen will never come. The centre will often contain the least electronegative element. Since hydrogen can only have two electrons in its valence shell and hence can only make one bond, it can never be the centre atom.
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The broad bands or regions located around the nucleus where the electrons are found are called energy rings.
True
False
It is false that the broad bands or regions located around the nucleus where the electrons are found are called energy rings.
The nucleus is the centre of an atom. Protons and neutrons are particles that make up the nucleus. Shells of electrons rotate around the nucleus. The atom is made up of a small nucleus surrounded by electrons that move. The nucleus includes protons, with a positive charge equivalent to the negative charge of an electron. Neutrons, which have almost the same mass but still no charge as protons, may also be found in the nucleus.
The nuclear powerful force extends long enough from each baryon to bind protons and neutrons together while repelling the repelling electrical force between positively charged protons. The nuclear force acting has a relatively narrow range and practically vanishes just beyond the nucleus's border.
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What is the identify of an element with 14 protons 14 neutrons and 14 electrons?
The element with 14 protons 14 neutrons and 14 electrons is Silicon
Protons and neutrons can both be found in the nucleus of an atom of any chemical element. These subatomic particles add up to give the atom's atomic mass. The characteristic that distinguishes isotopes of different elements from one another is their atomic mass.
Z, the atomic number, is 14 if there are 14 protons. Z being the quantity of large positively charged nuclear particles by definition. And Z establishes the atom's identity; if Z = 14,we can find on periodic table element that have atomic number 14 is silicon,
Therefore element with 14 protons 14 neutrons and 14 electrons is Silicon
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Why do different substances have different properties?
Different substances have different properties because of the differences in their atomic and molecular structure, bonding types, and strength of their chemical bonds. These differences can be due to the number of atoms, the arrangement of atoms, and the types of electrons involved in the bonding.
The properties of elements and compounds are determined by the types and arrangements of the atoms that make up the substance. For example, water (H2O) and hydrogen peroxide (H2O2) have different properties due to their different molecular structures. Water is made up of two hydrogen atoms and one oxygen atom, while hydrogen peroxide is made up of two hydrogen atoms and two oxygen atoms. may have different characteristics. The strength of chemical bonds between atoms or molecules can be affected by the number and type of electrons involved in the bond. Because of this, some substances are more stable than others and have higher melting and boiling points.
In addition, some properties are also affected by the physical state of the material, such as solubility, density, and conductivity. These properties are determined by the strength of the intermolecular forces between the particles of the substance.
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Ribose is an important sugar with a molar mass of 150.15 g/mol and an empirical formula of CH2O. What is the molecular formula
Ribose is an important sugar with a molar mass of 150.15 g/mol and an empirical formula of CH₂O . Its molecular formula is C₅H₁₀O₅
A molecular formula is defined as the exact number of different atoms present in the molecule of a compound. On the other hand, an empirical formula is defined as the simplest whole number ratio of the different atoms present in a molecule of a compound.
Given here,
molar mass of ribose sugar = 150.15 g/mol
empirical formula = CH₂O
To find: molecular formula
empirical formula mass of ribose sugar
= (12+ 1×2+ 16) g/mol
= 30 g/mol
molar mass/ empirical formula mass
= 150.15 gmol⁻¹ / 30 gmol⁻¹
=5.005
≈5
we know that
molecular formula
= molar mass/ empirical formula mass × empirical formula
=5 ×CH₂O
= C₅H₁₀O₅
Thus, the molecular formula is C₅H₁₀O₅
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why was the bohr model replaced
Answer:
The Bohr model of the atom was replaced by the quantum mechanical model because it was unable to explain the behavior of electrons in atoms. The quantum mechanical model was able to explain the behavior of electrons in atoms more accurately.
Explanation:
Leandra is learning about chemical reactions and she wants to examine the information that is included in a chemical equation. Which pieces of information does a chemical equation include
The pieces of information a chemical equation includes are:
The kind of molecules that are involved in the process. The several constituents that form a molecule.Whether or not the products are heavier than the reactants.A chemical equation is a graphical representation of a chemical process that employs symbols and chemical formulas. Reactant entities appear on the left, as well as product entities appear on the right, with a plus sign connecting the entities in both the reactants and the products and an arrow pointing towards the products to show the direction of the reaction.
Chemical formulae can be symbolic, structural (pictorial diagrams), or a combination of the two. The absolute values of the stoichiometric numbers are represented by the coefficients adjacent to the symbols and formulae of entities. Jean Beguin drew the very first chemical equation in 1615.
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Substances that can be dissolved in water are Group of answer choices rare. soluble. thermal. molecular.
Why does the arrangement of the particles affect the properties of the substance?
The arrangement of the particles in a substance affects its properties because the arrangement of the particles determines the interactions between the particles.
The arrangement of the particles affects the properties of a substance because the interactions between the particles determine the overall characteristics of the substance.
For example, if the particles in a substance are arranged in an orderly, crystalline structure, the inter-particle forces are strong, making the material harder and more rigid. On the other hand, if the particles are arranged in a disordered, amorphous structure, the inter-particle forces are weaker, making the material softer and more malleable.
The arrangement of the particles also affects the physical and chemical properties of the substance. If the particles are arranged in a crystalline structure, the substance will have a higher melting point, boiling point, and hardness than if the particles were arranged in an amorphous structure.
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If an engineer is designing a building in an area that has an occasional
supersonic flight pass over it, the engineer should:
A. Design the building with extra stores of oxygen for the workers in
case of emergencies caused by sonic booms.
B. Build the structure using materials that are heat resistant because
of the sonic booms.
C. Design extra reinforcements in the building's windows so that they
can withstand the vibrations from sonic booms.
D. Design the building with solar panels that can provide energy in
case of electrical outages due to sonic booms.
Design extra reinforcements in the building's windows so that they can withstand the vibrations from sonic booms.
What are Sonic booms?
Sonic booms are shock waves created when an object, such as an aircraft or spacecraft, travels through the air at a speed faster than the speed of sound (approximately 767 mph). Sonic booms generate a loud noise that can be heard over long distances. Sonic booms can cause property damage and are hazardous to people's hearing.
Extra reinforcements in the building's windows can help to absorb the shock of sonic booms. This is done by adding additional layers of materials such as glass, plastic, rubber, or metal to the window frame. These materials will help to dampen the vibrations from sonic booms, reducing the noise and preventing damage to the windows. Additionally, window seals can be installed to reduce air infiltration, further helping to protect the windows from the vibrations of sonic booms.
Hence, Option C is correct.
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Calculate the amounts of p-acetamidophenol (in grams) and bromoethane (in milli- liters) that are used in this reaction. 5. What is activated carbon? What is it used for, either in the lab or other applications?
the amount of bromoethane (in milli- liters) that are used in this reaction is 74.13ml.
Mol wt of P-Acetamido phenol = 151.16. Mol wt of Bromoethane = 108.97. Mol wt of Acetophenetidin (product) = 179.22. Paraacetamido phenol, mol wt=151.16. Bromoethane= 108.97. By the law of mass action, 151.16 g P-Acetamido phenol will react 108.97g Bromoethane to get 179.22 g Acetophenetidin (product) and 80.91 g Hydrobromic acid as a bye product. Since the density of Bromoethane = 1.47g/cc, the quantity of Bromoethane in milliliters = 108.97/1.47 = 74.13 ml. Activated carbon, also known as activated charcoal, is a form of carbon that has been processed to have small, low-volume pores that increase the surface area available for adsorption or chemical reactions. Activated carbon is used for a wide range of industrial and environmental applications, including purifying air and water, removing impurities from liquids and gases, and recovering valuable chemicals. In the laboratory, activated carbon is commonly used to purify organic compounds, remove dissolved gases from liquids, and purify water.
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If 1 gram (g) of glycogen is split into maltose (no maltotriose or dextrins are produced),
what is the total mass of the product?
If 1 gram (g) of glycogen is split into maltose: The total mass of the product would be 2 grams (g).
Mass of Maltose Resulting from the Breakdown of 1 Gram of GlycogenWhen 1 gram of glycogen is broken down into maltose, the result is two molecules of maltose, each having a molecular weight of 342.29 g/mol. Therefore, the total mass of the product is equal to 2 x 342.29 g/mol, or 684.58 g/mol, which is equal to 2 grams (g).
This is because each molecule of maltose is composed of two molecules of glucose, which have a mass of 342.29 g/mol each. Therefore, when the 1 gram of glycogen is split into maltose, the total mass of the product is 2 grams (g).
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A beaker was filled with a mixture of 40 liters of water and a liquid chemical in the ratio of 3 : 5, respectively. If 2 percent of the initial quantity of water and 5 percent of the initial quantity of liquid chemical evaporated each day during a 10-day period, what percent of the original amount of mixture evaporated during this period
30% of the original amount of mixture evaporated during the 10-day period.
In order to determine the percentage of the original amount of mixture that evaporated during the 10-day period, we need to first determine how much water and how much liquid chemical were present in the beaker initially.
Given that the ratio of water to liquid chemical is 3:5, we can assume that the total number of parts is 8 (3+5).
So, the original amount of water is 3 parts / 8 parts = 0.375
And the original amount of liquid chemical is 5 parts / 8 parts = 0.625
We can then use this information to determine how much of each substance evaporated each day:
2% of 40 L of water = 0.02 x 40 L = 0.8 L
5% of 40 L of liquid chemical = 0.05 x 40 L = 2 L
We can then add up the total amount of each substance that evaporated over the 10 days to find the total amount that evaporated from the beaker:
0.8 L of water evaporated/day x 10 days = 8 L
2 L of liquid chemical evaporated/day x 10 days = 20 L
Finally, we can add up the total amount of each substance that evaporated and divide by the total amount of the original mixture to find the percentage of the original amount that evaporated:
(8 L + 20 L) / (40 L + 40 L) = 0.3 or 30%
So 30% of the original amount of mixture evaporated during the 10-day period.
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how many grams of KNO3 that should be placed in the airbag to fully react with the Na.
10 Na + 2KNO: > 1K20 + 5Naz0 + 1 N2 (g)
NaN3→ Na + 32N2 1 mole of sodium azide gives 32 moles of N2
How much nitrogen is in an airbag?
37 gallons
The amount of nitrogen gas produced by a handful (130 grammes) of sodium azide is 67 litres, which is sufficient to inflate a typical air bag. An air bag can be inflated in as little as 0.03 SECOND. There is another chemistry at play.
Even though we don't typically link chemistry with cars, a lot of chemistry happens in a functioning car, such as the chemical processes that take place in the battery to produce electricity and the burning of gasoline to power the engine. Another reaction includes the air bag, which is one that most drivers would much rather not experience firsthand.
Instead of using compressed gas, air bags are inflated using the byproducts of a chemical reaction. Sodium azide, often known as NaN3, is the principal chemical involved in the air bag reaction
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How many moles are in 1gm?
The mole is the fundamental unit of substance quantity in the SI. 0.041143797572516 moles make up 1 gram of magnesium. The grams to moles formula Use the grams to moles formula to calculate the number of moles, n, of a substance with a given mass, m, (in grams) accurately. n = m / M.
Depending on the substance, yes. As a reminder, a mole is equal to 6.02 1023 atoms and is used to measure quantities. Therefore, it stands to reason that lead and hydrogen would weigh differently. Less moles would be required because it would take a lot fewer lead atoms to make up 1 gram. However, one hydrogen atom has far less mass than one lead atom, therefore more atoms (and moles) would be required to create one gram.
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PLEASE HELP : A dead alkaline battery is found to contain a compound of manganese and oxygen. Its percentage composition is 70. 0% Mn and 30. 0% O. What is the empirical formula of this substance?
The empirical formula of the compound is MnO2.
The empirical formula of a substance is the simplest whole-number ratio of atoms in a compound. To find the empirical formula of a compound, you first need to determine the number of moles of each element present in the compound.
Given that the percent composition of the compound is 70% Mn and 30% O, we can assume that 100g of the compound contains 70g Mn and 30g O.
To convert mass to moles, we need to know the molar mass of each element. The molar mass of Mn is 54.9380 g/mol, and the molar mass of O is 16.00 g/mol.
So, we have:
70g Mn / 54.9380 g/mol = 1.27 moles Mn30g O / 16.00 g/mol = 1.87 moles OThe simplest whole number ratio of Mn and O that gives 1.27 moles Mn and 1.87 moles O is 1:2.
Therefore, the empirical formula of the compound is MnO2.
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The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 1.000-mg sample remain after 7.55 years
Cobalt-60 has a half-life of 5.20 years, which means that half the sample will be present after that time.
What is cobalt?The chemical element cobalt has the atomic number 27 and the symbol Co. It is a naturally occurring hard, glossy, silver-gray metal that is found in rocks and soils. Cobalt is magnetic when it is pure, and it can be used to make alloys, magnets, and colours. Additionally, it is employed in the manufacture of batteries, catalysis, and pharmaceuticals. The production of vitamins and proteins depends on cobalt, a trace mineral that is crucial for maintaining human health.
After 7.55 years, about 0.78 of the original 1.000 mg sample will remain.
Therefore, 0.78 x 1.000 mg = 0.780 mg will remain after 7.55 years.
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If the mass of the products (AlCl3 and Cu) are 146g total and the mass of CuCl2 on the reactant side is 126 grams, what is the mass of Al
Your limiting reagent will be copper (II) chloride. The mole ratio is the most crucial tool you'll have to tackle this problem, or any other stoichiometry problem, for that matter.
Keep in mind that in order to make 3 moles of copper from 3 moles of copper (II) chloride, you need 2 moles of aluminum. Unbalanced reaction: Al(s)+HCl(aq) AlCl3(aq)+H2(g). Cl. Balance On the product side there are three Cl atoms and on the reactant side there is one. There is only one hydrogen atom on the reactant side and two on the product side of the reaction Mg + HCl MgCl 2 + H 2. The equation is therefore unbalanced.
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statement about isomers is true?
Isomers contain the same number of electrons and neutrons, but different numbers of protons.
Isomers contain the same number of protons, but different numbers of neutrons.
Isomers have the same chemical formula, but different structures.
Isomers have the same formula weight, but different nuclear distributions.
Statement about isomers which is true is that isomers have the same chemical formula, but different structures.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
There are four types of chemical formula:
1)empirical formula
2) structural formula
3)condensed formula
4)molecular formula
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A compound is found to contain 43.64 % phosphorus and 56.36 % oxygen by weight The molecular weight for this compound is 283.88 g/mol. What is the molecular formula for this compound
A compound is found to contain 43.64 % phosphorus and 56.36 % oxygen by weight The molecular weight for this compound is 283.88 g/mol. is the molecular formula for this compound is P₂O₅.
Given that :
mass of the oxygen = 56.36 %
molar mass of the oxygen = 16 g /mol
moles of the oxygen= mass / molar mass
= 56.36 / 16
= 3.52 mol
mass of the phosphorus = 43.64 %
molar mass of the phosphorus = 31 g/mol
moles of the phosphorus = 43.64 / 31
= 1.41 mol
dividing by the smallest one :
moles of the phosphorus = 1 = 2
moles of the oxygen = 2.5 = 5
The molecular formula is P₂O₅.
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