Answer :
Double replacement reaction : It is a type of reaction in which a positive cation and a negative anion of the reactants react to give a new compound as a product.
[tex]AB+CD\rightarrow AD+CB[/tex]
In this, A and C are the cations and B and D are the anions.
When one mole of potassium hydroxide react with the one mole of zinc chloride to give one mole of zinc hydroxide and 2 moles of potassium chloride.
The balanced chemical reaction is,
[tex]KOH+ZnCl_2\rightarrow Zn(OH)_2+2KCl[/tex]
draw a diagram explaining the relationship between atoms, moles, and molecules
This diagram explains the relationship between atoms,moles and molecules.
moles ↔ molecules ↔ atoms
Atoms are the building blocks of substances, and molecules are formed by distinct arrangements of atoms. A mole is a unit that enables us to express very large quantities of atoms or molecules. Models like the ball-and-stick aid in visualizing these relationships.
Explanation:The relationship between atoms, moles and molecules can be seen in how each unit of matter interacts with each other. Atoms are the building blocks of substances, and molecules are formed by distinct arrangements of these atoms, typically of more than one element. In the model of an organic molecule, for example, atoms of carbon, hydrogen, nitrogen, oxygen, and sulfur are shown in proportional atomic size, and the chemical bonds indicated by silver rods demonstrate the connections between these atoms (Figure 2.1).
The molecular formula uses chemical symbols and subscripts to indicate the exact numbers of different atoms in a molecule or compound. An empirical formula, meanwhile, gives the simplest, whole-number ratio of atoms forming a compound (molecular orbital theory). When we talk about moles, this is a convenient unit for expressing very large numbers of atoms or molecules. The mass in grams of 1 mole of substance is known as its molar mass. Moreover, you have probably heard about Avogadro's number, which amounts to 6.022 x 10^23, the number of entities composing 1 mole of substance.
A concept that can help visualize these relationships is the ball-and-stick model, which shows the geometric arrangement of atoms within a molecule. This model also illustrates how molecules are three-dimensional, and can describe molecular bonds in terms of their distances, angles, and relative arrangements in space, providing a more in-depth understanding of molecular structure (molecular orbital diagram).
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An element's atomic number is 44. How many electrons would an atom of this element have?
Atomic number is the number of protons in an atom and is equal to the number of electrons also.
Atomic number = 44.
Hence number of electrons in an atom of this element (with atomic number 44) = 44 electrons.
What type of energy is present in lightning?
A.) Electrical energy
B.) Chemical energy
C.) Nuclear energy
D.) Potential energy
A.) Electrical energy
is your answer
A.) Electrical
This was proven by Benjamin Franklin with his kite experiment.
What is the number of moles in 432g Ba(NO3)2
First there is a need to calculate the molar mass of Ba(NO₃)₂:
137.3 + 2 (14.0) + 6 (16) = 261.3 grams/mole
The molar mass, denoted by M in chemistry refers to a physical characteristic illustrated as the mass of a given component divided by the amount of the component. The molar masses are always denoted in grams/mole.
After finding the molar mass, the number of moles can be identified as:
432 grams / 261.3 g/mol = 1.65 moles of Ba(NO₃)₂.
The number of moles in 432g of Ba(NO₃)₂, is 1.653.
To calculate the number of moles in 432g of Ba(NO₃)₂, we first need to find its molar mass. The molar mass of Ba(NO₃)₂ is calculated as follows:
Ba: 137.3 g/molN: 2 x 14.0 g/mol = 28.0 g/molO: 6 x 16.0 g/mol = 96.0 g/molTherefore, the molar mass of Ba(NO₃)₂ is 261.3 g/mol.
Next, we use the formula for the number of moles:
Number of moles = mass / molar massSo, the number of moles of Ba(NO₃)₂ in 432g is:
Number of moles = 432g / 261.3 g/mol = 1.653 molesAn individual with an excellent sense of smell is handed a bottle of perfume. After smelling the perfume, he reports that the perfume contains a predominant smell of roses with a faint touch of vanilla. If the perfume is made from water, rose essence, and a splash of vanilla, it is most likely A. a mixture. B. a gas. C. an element. D. a compound.
Answer:
A. a mixture.
Step-by-step explanation:
If the perfume is made from water and anything else, it is a mixture.
B. is wrong, because water is a liquid at room temperature.
C. is wrong, because water is a compound.
D. is wrong, because the perfume is a mixture of water and other compounds.
Answer: A. a mixture.
Explanation:
Element is a pure substance which is composed of atoms of similar elements. It can not be decomposed into simpler constituents using chemical reactions.Example: Copper [tex]Cu[/tex]
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water [tex]H_2O[/tex]
Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present.The components do not combine chemically and hence retain their original properties. Example: perfume made from water, rose essence, and a splash of vanilla.
Thus the perfume is most likely a mixture as different components retain their original properties.
Which answer choice is an example of a correct chemical name?
Al2O3
aluminum oxygen
O3Al2
aluminum oxide
im very postive it is aluminum oxide (;
Hello There,
The answer is:
aluminum oxygen
Hope this help have a great day :)
What happens to the particles of an object as temperature is added to it or taken away from it
Answer:
If temperature added
If temperature is added to the object, the particles of the object vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the space of matter of the object. This results in increased molecular motion, object expands and takes up more space
If temperature taken away
If temperature is taken away from object, the particles vibrate slower. The atoms can get closer result in the matter contracts.
In both cases the mass is not changes. and it happens in all solids, liquids and gases
arsenic-80 alpha decay
Chelation. Dimercaprol and dimercaptosuccinic acid are chelating agents that sequester the arsenic away from blood proteins and are used in treating acute arsenic poisoning. The most important side effect is hypertension. Dimercaprol is considerably more toxic than succimer.
Elements located in the vertical column of the periodic table are of the same and have____chemical properties.
Answer:
Similar
Explanation:
Elements that are located in the same vertical colomn or group of the periodic table have similar chemical properties. This is because they have the same amount of valence electrons in the outermost shell.
What is the total anion concentration (in mEq/L ) of a solution that contains 6.0 mEq/L Na + , 11.0 mEq/L Ca 2+ , and 1.0 mEq/L Li + ?
24
Ddddd
Hope I helped
which describes the composition of the ocean floor?
The composition of the ocean floor can be described as option A. Basalt covered in sediment
which describes the composition of the ocean floor?Basaltic rocks are the main type of rock on the ocean floor. They are made from cooled lava. Basalt is a kind of rock that has a lot of iron and magnesium. It looks dark and smooth. It forms most of the bottom layer of the ocean.
The ocean floor has different types of stuff called sediments covering it. These sediments can come from land, like rocks breaking down and being carried away, or from sea creatures, like shells and skeletons collecting on the ocean floor.
Hence option a is correct.
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see full text below
Which describes the composition of the ocean floor?
A. Basalt covered in sediment
B. Sediment covered in basalt
C. Granite covered in sediment
D. Basalt covered in granite
Which of the following is NOT needed in air for water condensation to occur?
A. Temperature at the dew point
B. Condensation nuclei
C. Temperature inversion
D. Water vapor
Answer:
option C)
Explanation:
correct option is option C)
in troposphere when we move up the temperature goes on decreasing and the hot air from the earth surface comes into contact with the cold air of the troposphere then air gets condensed.
but in temperature inversion when moves up temperature increases and this leads the gases to not to condense.
How is the atomic mass of an element calculated? A. by determining the number of electrons in the outer orbital B.by determining the number of protons in the nucleus C. by taking the weighted averages of naturally occurring isotopes of that element D. by dividing its mass by that of the carbon-12 atom
By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom.
The atomic mass of an element is calculated by taking the weighted averages of naturally occurring isotopes of that element. C is the correct option among the given options.
Atomic mass, also known as atomic weight, refers to the average mass of atoms of an element. It is a relative measure that compares the mass of an atom to the mass of a reference atom. The atomic mass is typically expressed in atomic mass units [tex](amu)[/tex] or unified atomic mass units [tex](u).[/tex]
This means that, the atomic mass of an element is calculated by taking into account the abundance of each isotope of the element and its atomic mass. A weighted average is an average in which each value to be averaged is multiplied by a factor reflecting its importance, and the resulting products are added together and then divided by the sum of the factors.
Therefore, the weighted averages of naturally occurring isotopes of that element is referred as atomic mass. Option C is the correct option.
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lewis structures cannot
Answer:
Show the strength of bonds.
Explanation:
Lewis structures just show the bonding but not the strength.
Answer:
Show the strength of bonds
Explanation:
What is the geometry name for CH2S? Is it polar or non-polar?
The molecular geometry of CH₂S is trigonal planar and the molecule is polar .
What is molecular geometry?Molecular geometry can be defined as a three -dimensional arrangement of atoms which constitute the molecule.It includes parameters like bond length,bond angle and torsional angles.
It influences many properties of molecules like reactivity,polarity color,magnetism .The molecular geometry can be determined by various spectroscopic methods and diffraction methods , some of which are infrared,microwave and Raman spectroscopy.
They provide information about geometry by taking into considerations the vibrational and rotational absorbance of a substance.Neutron and electron diffraction techniques provide information about the distance between nuclei and electron density.
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How many grams of carbon monoxide are needed to react with an excess of iron (III) oxide to produce 198.5 grams of iron? Fe2O3(s) + 3CO(g) -----à 3CO2(g) + 2Fe(s)
Answer : The grams of carbon monoxide needed are 148.89 g
Solution : Given,
Mass of iron, Fe = 198.5 g
Molar mass of iron, Fe = 56 g/mole
Molar mass of carbon monoxide, CO = 28 g/mole
First we have to calculate the moles of iron, Fe.
[tex]\text{ Moles of Fe}=\frac{\text{ Mass of Fe}}{\text{ Molar mass of Fe}}=\frac{198.5g}{56g/mole}=3.545moles[/tex]
The balanced chemical reaction is,
[tex]Fe_2O_3(s)+3CO(g)\rightarrow 3CO_2(g)+2Fe(s)[/tex]
From the balanced reaction, we conclude that
2 moles of iron produces from the 3 moles of carbon monoxide
3.545 moles of iron produces from the [tex]\frac{3}{2}\times 3.545=5.3175[/tex] moles of carbon monoxide
Now we have to calculate the mass of carbon monoxide, CO.
[tex]\text{ Mass of CO}=\text{ Moles of CO}\times \text{ Molar mass of CO}[/tex]
[tex]\text{ Mass of CO}=(5.3175moles)\times (28g/mole)=148.89g[/tex]
Therefore, the grams of carbon monoxide needed are 148.89 g
why is water a good solvent
Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. ... This allows the water molecule to become attracted to many other different types of molecules.
Helppppp what are the atomic mass neutrons and nuclear charge to these elements? For 15 POINTS
In these atoms, the positive and negative charges cancel each other out, leading to an atom with no net charge.
(Protons, neutrons, and electrons)
If molarity = moles liter , then how many grams of NaCl are needed to make 1 liter of a 0.1 M solution? A) 0.0584 g NaCl B) 3.246 g NaCl C) 5.844 g NaCl D) 58.44 g NaCl
The grams of NaCl that needed to make 1L of a 0.1 M solution is
5.845 g (answer C)
calculation
Step 1: find the moles of NaCl
moles = molarity x volume in liters
molarity = 0.1 M =0.1 mol/l
= 1 L x 0.1 Mol/L = 0.1 moles
Step 2: find the mass NaCl
mass = moles x molar mass
From periodic table the molar mass of NaCl = 23 +35.45 =58.45 g/mol
mass= 0.1 moles x 58.45 g/mol =5.845 g appropriate ( answer C)
To calculate the number of grams of NaCl that would be needed to make 0.1 M of solution we have to calculate;
The molecular weight of sodium chloride (NaCl) which is 58.44 g, so one gram molecular weight will be= 1 mole which is 58.44 g.By dissolving 58.44 g of NaCl upto the final volume of 1 litre, one can get 1 M NaCl solution.So, to make 0.1 M NaCl solution we have to dilute the mass of salt to 1000 ml of solution as follows;0.1 M NaCl solution will require 0.1 x 58.44 g of NaCl = 5.844 g. of NaCl.ch4+o2 > CO2+H2O
what's the balance
the balanced equation is:
CH4 +2O2 -> CO2+2H2O
Answer:
[tex]\huge \boxed{\mathrm{CH_4+ 2O_2 \Rightarrow CO_2 +2 H_2O}}[/tex]
[tex]\rule[225]{225}{2}[/tex]
Explanation:
[tex]\sf CH_4+ O_2 \Rightarrow CO_2 + H_2O[/tex]
Balancing the Hydrogen atoms on the right side,
[tex]\sf CH_4+ O_2 \Rightarrow CO_2 +2 H_2O[/tex]
Balancing the Oxygen atoms on the left side,
[tex]\sf CH_4+ 2O_2 \Rightarrow CO_2 +2 H_2O[/tex]
[tex]\rule[225]{225}{2}[/tex]
I need help with #26
Radioactive substances decay and emit alpha, beta, positron, and gamma particles in the process of converting to stable nuclei. An alpha particle has two protons and two neutrons, is relatively heavy and deflected by electrical and magnetic fields. Beta particles are fast moving electrons which are greatly deflected by electrical and magnetic fields. Gamma particles (highly energetic) are neutral and not deflected electrical and magnetic fields. Positron is positively charged beta particle. Opposite charges attract each other. So we can say that alpha particle and positron being positively charged are attracted towards the negative plate. Alpha particle is heavy, so it is slightly deflected towards the negative plate. Beta particle being negatively charged is deflected towards the positive plate and gamma particle is neutral and not deflected in the electrical field.
Therefore, the correct answer is,
A. Beta particle
B. Gamma particle
C. Alpha particle
D. Positron
The correct answer indicating the particle deflected towards the positive plate is option A, the Beta particle. Options B (Gamma particle), C (Alpha particle), and D (Positron) are not deflected towards the positive plate in an electric field.
In the context of radioactive decay, the behavior of particles in electric and magnetic fields provides clues to their charge and mass.
Beta particles, being fast-moving electrons, are negatively charged and deflect towards the positive plate.
Gamma particles, being neutral, remain unaffected by electric and magnetic fields.
Alpha particles, although positively charged, are heavy and only slightly deflected towards the negative plate.
Positrons, being positively charged, would be attracted towards the negative plate.
Therefore, the correct answer indicating the particle deflected towards the positive plate is option A, the Beta particle. Options B (Gamma particle), C (Alpha particle), and D (Positron) are not deflected towards the positive plate in an electric field.
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How many significant figures are in the following number? 5.67 x 10^6
there are three sientific figures
exponents decimal multiplication
Significant figures are the digits in a number that carry meaningful information about its precision. The number 5.67 x 10⁶ has three significant figures.
Significant figures are the digits in a number that carry meaningful information about its precision. In this case, the digits 5, 6, and 7 are significant because they represent specific values.
The exponential notation (scientific notation) 10⁶ indicates that the number is multiplied by 10 to the power of 6, which means it is 5.67 million. The zeros at the end of the number are not considered significant; they are used to denote the scale of the value but do not add any additional precision.
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How do u do this ??? I need help1
so for shortest it would be x-rays, middle would be red visible light and longest would be infrared
the one with most energy would be gamma rays and the least would be radio waves i think.
What do you, a complex, multicellular organism, have in common with this single-celled algae that lives in the ocean? A) We have nothing in common. B) We have similar cell structure. C) We have the exact same cell parts. D) We both need salt water to survive.
Answer:
The answer is "B". We have similar cell structure.
Explanation:
We have similar cell structure. The algae is made of one cell. We are made of many, many cells. The cells that make up complex living things are different from each other.
The thing that a complex, multicellular organism, has in common with single-celled algae that live in the ocean is B. We have a similar cell structure.
Cells are referred to as the building blocks of life. Cells are important for every organism. It should be noted that while a unicellular organism and one cell, the multicellular organisms have two or more cells. It should be noted that the unicellular organisms and the multicellular organisms have the same cell structure. In this case, the unicellular organisms and the multicellular organisms both have cytoplasm and plasma membranes. They also contain DNA and ribosomes which are important for gene expression.In conclusion, the correct option is B
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What is the weight, on earth, if a book with a mass of 1.5kg 1.5N 6.5 N 11.3 N 14.7
Consider the equation for weight:
W=mg
W is the weight, m is the mass, and g is the acceleration due to gravity.
Therefore, to calculate the weight of an object, just multiply its mass by the acc. due to gravity of the location.
The acc. due to gravity on Earth is approximately 9.81 ms^-2, note that this number may change from place to place, for example, the acc. due to gravity on moon is only 1/6 of Earth's. (Sometimes the question provides g as 10, so make sure you check the instructions before!)
W = 1.5 x 9.81
= 14.715N (≈14.7N)
Therefore, the answer to this question is the last option (or D), 14.7N.
think about putting a glass of water on the counter, in the freezer, and on a hot stove how does the temperature of the water affect the kinetic energy and physical state?
The kinetic energy and the physical state of water depend strongly on the temperature;
Firstly, The kinetic energy of water on a hot stove is higher than that on the counter in the freezer; that the kinetic energy is directly proportional to the temperature according to the relation: [tex]K = \frac{3RT}{2NA}[/tex] ; where R is the universal gas constant, T is the temperature and NA is Avogadro number.As the temperature increases, the speed of colliding molecules increases and the kinetic energy increases.
Secondly, The physical state of water depends on the temperature; water has three states (gas, liquid and solid) depends on the temperature.If a glass of water is putt on the counter in the freezer, it will be converted to the solid state (ice).And, as if it is putt on a hot stove, it will be vapor (gaseous state).The equation that describes the process of photosynthesis
the last choice is the equation for photosynthesis
what is the empirical formula for h2so4
The empirical formula is [tex]H_2SO_4[/tex] .
Empirical formula:-It is the simplest ratio of atoms of elements in a compound. So, the empirical formula is [tex]H_2SO_4[/tex] . The given formula is already in its simpler form.
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Final answer:
The empirical formula for sulfuric acid (H₂SO₄) is H₂SO₄ because the formula is already at its simplest whole-number ratio which cannot be reduced further.
Explanation:
The empirical formula for sulfuric acid (H₂SO₄) is simply its simplest formula, which defines the relative proportions of each type of atom in the substance. An empirical formula is based on the smallest whole-number ratios of atoms in a compound. In the case of H₂SO₄, the empirical formula is the same as its molecular formula because it cannot be reduced to smaller whole-number ratios. Sulfuric acid consists of two hydrogen (H) atoms, one sulfur (S) atom, and four oxygen (O) atoms.
The empirical formula shows the simplest ratio of elements in a compound. In most cases, this is not necessarily the actual number of atoms present in a molecule of the compound, but for H₂SO₄, the empirical formula and molecular formula are identical. To derive an empirical formula, you would normally divide the moles of each element by the smallest number of moles to get a whole-number ratio, but with sulfuric acid, no division is necessary as it is already in the lowest terms.
whats a chemical and what does it do?
Answer
Chemical refers both chemical substances and mixtures.Chemical is a substance, it is in the form of matter having chemical composition and characteristic propertiesChemical substances exists in liquids, solids and gases.Chemicals processes the reactions to obtain various useful things.The continuous release of nuclear energy caused when on fission reaction triggers more nuclear reactions is a _
Answer: These are called as nuclear chain reactions.
Explanation: Nuclear Fission reactions are the reactions in which one heavier nuclei produces two lighter daughter nuclei.
Nuclear chain reactions are defined as the chemical reactions when one neutron released in a fission reaction produces another fission reactions in other nucleus. The other nucleus again releases neutrons and a chain of reactions is formed.
These reactions are generally uncontrollable.
Hence, The continuous release of nuclear energy caused when on fission reaction triggers more nuclear reactions is a nuclear chain reaction.