write a net ionic equation to show why solid barium hydroxide, ba(oh)2 (s), forms a basic solution when it dissolves in water.
Answers
Ba(oh)2 (s) → Ba2 (aq) + 2OH (aq). In water, barium hydroxide completely dissociates to form barium ions and hydroxyl ions. The hydroxyl ions are fully accountable for the solution's basic nature.
Arrhenius bases are chemical compounds that react with water to form hydroxyl ions. As a result, the pH of the resulting solution is greater than 7, but less than 14. (except in the case of unusually strong bases). Strong bases entirely dissociate, whereas weak bases only partially.
Because its clear aqueous solution is guaranteed to be carbonate-free, barium hydroxide tends to form an alkaline solution in water that can be used to titrate weak acids (barium carbonate is insoluble in water).
Energy decreases as one moves down the group lattice due to cation size increases. Because of the difference in lattice energy, Be(OH)2 is insoluble in water while Ba(OH)2 is highly soluble.
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Answer:
Explanation:
Ba(OH)2(s) --->Ba^2+(aq)+2OH^-(aq)
Related Questions
(they don't have science so I guess cemastry will do.)
warm air rises because of___
A student holds the back of his hand near an iron tosee if it's hot. The heat transfer is___
Warm water moves throuout a mattress because of___
In a swimmming pool The watter near the surface is warmer because of___
(i'll do the rest later)
Answers
warm air rises because of convection.
A student holds the back of his hand near an iron to see if it's hot. The heat transfer is conduction.
Warm water moves throughout a mattress because of ... why is there warm water in a mattress again? Convection, I guess.
In a swimming pool, the water near the surface is warmer because of convection and solar radiation; it's closer to the Sun than the bottom of the pool, so it receives more thermal radiation, making it warmer.
Contrast How are photosynthesis and cellular respiration different?
Answers
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Cellular respiration converts oxygen and glucose into water and carbon dioxide.
16. Keesha performed a chemical reaction, and the products looked quite
different from the reactants. She knew the amount of matter had not
changed due to the law of conservation of mass. According to the law of
conservation of mass, what happens in a chemical reaction? *
Answers
Answer:
it's the third one
Explanation:
matter can't change, but mass can differ
What the anode , cathode and the electrolyte of a cell tha t you might use to electrolyte a spoon made from iron with silver?
Answers
The silver coating on the spoon is produced. When electrolyzing a spoon made from iron with silver, the anode, cathode, and electrolyte that can be used are as follows:
Anode: The anode is a negatively charged electrode, usually made of metal or graphite, that releases electrons during electrolysis. It is made of pure silver.Cathode: The cathode is a positively charged electrode that receives electrons during electrolysis. It is made of iron.Electrolyte: The electrolyte is a solution that conducts electricity and contains ions that can be reduced or oxidized. The electrolyte used for this process is a solution of silver nitrate (AgNO3) in water.The silver ion (Ag+) moves from the anode to the cathode through the electrolyte. At the cathode, it accepts an electron, reducing it to metallic silver (Ag). Fe(s) is oxidized to Fe2+(aq) ion at the anode, while Ag+ ions are reduced to Ag(s) at the cathode. Therefore, the silver coating on the spoon is produced.For such more questions on silver coating
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A substance that can't be broken down into simpler substances using any chemical means is called?
Answers
A substance that cannot be broken down into simpler substances using any chemical means is called an "element".
An element is a pure substance that is made up of only one type of atom, and each element has a unique set of physical and chemical properties. Examples of elements include hydrogen, oxygen, carbon, gold, and iron. There are currently 118 known elements, organized on the periodic table based on their atomic structure and properties. In chemistry, a substance is a type of matter that has a constant composition and distinct properties. It is a form of matter that is made up of only one type of molecule, atom, or ion. A substance can be either an element or a compound. Elements are pure substances that cannot be broken down into simpler substances by chemical means, whereas compounds are substances that are made up of two or more different elements chemically combined in a fixed ratio.
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Explain why gold is found in its unreacted form, as the metal
itself in the Earth.
Answers
The unique combination of gold's chemical properties, stability, and the geological processes that occur in the Earth's crust, all contribute to the formation of gold in its unreacted form as the metal itself.
What makes gold found in it's unreacted form?Gold is found in its unreacted or pure form in the Earth's crust because of its chemical properties. Gold is often found in geologically active areas such as fault lines and volcanic fields.
In these regions, high temperatures and pressures cause gold to move in a molten state, eventually leading to subsidence and vein formation.
Therefore, the unique combination of gold's chemical properties, stability, and the geological processes that occur in the Earth's crust, all contribute to the formation of gold in its unreacted form as the metal itself.
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the sodium‐potassium ion pump found in some cell membranes is made of which of the following basic structural components? a amino acids b fatty acids c monosaccharides d nucleotides
Answers
The sodium-potassium ion pump found in cell membranes is made of amino acids. Option A is correct option.
The sodium-potassium ion pump is a type of integral membrane protein that actively transports sodium ions (Na+) out of the cell and potassium ions (K+) into the cell.
This pump plays a crucial role in maintaining the electrochemical gradient across the cell membrane, which is necessary for various cellular functions.
Amino acids are the building blocks of proteins, and proteins are composed of one or more polypeptide chains. The sodium-potassium ion pump is a protein, and its structure is formed by a specific arrangement of amino acids.
These amino acids contribute to the pump's ability to bind and transport sodium and potassium ions across the cell membrane.
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Enter your answer in the provided box. Calculate the wavelength of a
photon of electromagnetic radiation with a frequency of 61.7 MHz. m
Be sure to answer all parts. Calculate the energy of a photon of
electromagnetic radiation with a wavelength of 582.8 nm. * 10 Report
your answer in scientific notation using the provided boxes.
Answers
we find the energy to be approximately \(3.41 * 10^-19\) Joules is the answer.
To calculate the wavelength of a photon with a frequency of 61.7 MHz, we can use the formula: wavelength = speed of light / frequency. The speed of light is approximately\(3 * 10^8\) meters per second.
Converting the frequency to Hz (\(1 MHz = 10^6 Hz\)), we have \(61.7 * 10^6\)Hz.
Plugging these values into the formula, we get: wavelength =\((3 * 10^8 m/s) / (61.7 * 10^6 Hz).\)
Simplifying, we find the wavelength to be approximately 4.862 meters.
Now, to calculate the energy of a photon with a wavelength of 582.8 nm, we can use the equation: energy = Planck's constant × speed of light / wavelength.
Planck's constant is approximately \(6.63 * 10^-34\) Joule-seconds.
Converting the wavelength to meters (\(1 nm = 10^-9 m\)), we have \(582.8 * 10^-9 m.\)
Plugging these values into the equation, we get: energy =\((6.63 * 10^-34J·s) * (3 * 10^8 m/s) / (582.8 * 10^-9 m).\)
Simplifying, we find the energy to be approximately \(3.41 * 10^-19\) Joules.
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a certain hydrocarbon is found to have the percent composition (by mass) of 92.3% c. the molecular formula contains 6 carbon atoms. how many hydrogen atoms are contained in a molecular of this compound?
Answers
The number of atoms of hydrogen contained in the molecular formula of the compound is 6 atoms
How to determine the number of atomsWe'll begin by obtaining the formula of the compound. This can be obtained as follow:
C = 92.3%H = 100 - 92.3 = 7.7%Empirical formula =?Divide by their molar mass
C = 92.3 / 12 = 7.7
H = 7.7 / 1 = 7.7
Divide by the smallest
C = 7.7 / 7.7 = 1
H = 7.7 / 7.7 = 1
Thus, the empirical formula of the compound is CH
Finally, we shall determin the number of atoms of hydrogen present in the compound. This can obtained as follow:
When 1 atom of carbon was present, 1 atom of hydrogen was also present.
Therefore,
When 6 atoms of carbon is present, then 6 atoms of hydrogen are also present.
Thus, we can conclude that the number of atoms of hydrogen is 6 atoms
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Which of the following statements is true? Running an electric current through a magnet can create a magnetic field, Electrons are found in the nucleus of an atom, The strength of a magnetic field increases with distance, Electric engines change electricity into magnestism
Answers
Answer:
running an electric current through a magnet can create a magnetic field
An elementary step is characterized by its _____, which is equal to the number of reactant particles in the step. multiple choice question. order molarity concentration molecularity.
Answers
An elementary step is characterized by its molecularity which is equal to the number of reactant particles in the step
What is Elementary step of reaction ?A one-step reaction is referred to as an elementary reaction. The coefficients of the reactants in the balanced equation can be used to get the rate law for an elementary reaction. For instance, rate = k[A]2[B] is the rate rule for the elementary reaction 2A + B products.
The sum of the stoichiometric coefficients of the reactants in the chemical equation of the reaction determines the molecularity of the chemical reaction. It can also mean the quantity of reactant molecules involved in a particular reaction step.Learn more about Elementary step here:
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Matter cannot change liquid to solid true or false
Answers
Answer:
yes, I am pretty sure it can
what will be the result of the reaction
(CH3COO)2+redP +Cl2
Answers
Answer:
(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl
Explanation:
This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.
When 8.0 moles of chromium react, how many moles of chromium (lll) oxide are produced?
Answers
Moles of chromium (lll) oxide produced : 4 moles
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
4Cr+3O₂⇒2Cr₂O₃
moles of Cr=8 moles
From the equation, mol ratio Cr : Cr₂O₃ = 4 : 2, so mol Cr₂O₃ :
\(\tt \dfrac{2}{4}\times 8=4~moles\)
A camel eats 18.3 kg of Bermudagrass hay that is 14.7 %
CP on a dry matter basis. If the DM percentage of the hay is 83.4
%, how much protein did the camel consume?
Answers
The camel consumed approximately 2.24 kg of protein from the Bermudagrass hay.
To calculate the amount of protein the camel consumed, we need to consider the dry matter basis of the hay. Here's how you can calculate it:
Calculate the dry matter weight of the hay:
Dry Matter Weight = Total Weight of Hay × Dry Matter Percentage
Dry Matter Weight = 18.3 kg × (83.4/100)
Dry Matter Weight = 18.3 kg × 0.834
Dry Matter Weight = 15.2442 kg
Calculate the protein content in the dry matter;
Protein Content = Dry Matter Weight × Protein Percentage
Protein Content = 15.2442 kg × (14.7/100)
Protein Content = 15.2442 kg × 0.147
Protein Content = 2.2414194 kg
Therefore, the camel consumed approximately 2.24 kg of protein from the Bermudagrass hay.
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Using the table on the right, perform the following metric unit conversions. Type your answer in the space provided
0.001087 kg ____ g
25 ml = ____ L
Answers
Answer:
1.087
Explanation:
FULL ANSWER:
0.001087 kg = 1.087
25 mL = 0.025 L
531 ms = 0.531 s
In an open manometer with an atmospheric pressure of 104 kPa, the mercury level in the arm connected to the gas is 150 mm Hg lower than in the arm connected to the atmosphere. What is the pressure of the gas sample?
Answers
kPa + 150 mm Hg = 254 kPa.
0. A radioactive isotope has a half-life of 273 days. How much of a sample of 100 grams of the isotope would remain after 732 days?
Answers
The amount of a sample of 100 grams of a radioactive isotope that would remain after 732 days would be 14.0625 grams.
Given, the Half-life of the radioactive isotope = 273 days.Time elapsed = 732 days.Initial quantity or sample = 100 grams. Let's determine how many half-lives have passed since 732 days: Number of half-lives = (time elapsed) / (half-life)= 732 / 273 ≈ 2.683
Half-life #1: After the first half-life of 273 days, the sample will be halved. Therefore, after 273 days, the quantity remaining will be 1/2 * 100g = 50g
Half-life #2: After the second half-life of 273 days, the sample will be halved again. Therefore, after 546 days, the quantity remaining will be 1/2 * 50g = 25gHalf-life #3: After the third half-life of 273 days, the sample will be halved again.
Therefore, after 819 days, the quantity remaining will be 1/2 * 25g = 12.5gHowever, the time elapsed from 819 days to 732 days is 87 days. This time interval is less than the half-life. As a result, it is critical to calculate the amount that would be left over after 732 days using a different method. Let us consider the remaining amount from 819 days (12.5g) as the new initial quantity for the remaining 87 days. The half-life of the radioactive isotope is 273 days.
Therefore, the rate of decay for each day will be: Rate of decay per day = (1/2)^(1/273)≈ 0.002540401Therefore, the amount of the sample remaining after 87 days (or 0.3195 half-lives) can be calculated using the following formula: Q = Q0(0.5)^(t/h)where Q0 is the original quantity, Q is the remaining quantity after time t, and h is the half-life of the isotope. Q = 12.5g × (0.5)^(0.3195)Q ≈ 6.5625g
Therefore, the total amount of the sample remaining after 732 days can be found by adding up the amounts of the sample remaining from each half-life: Total remaining = 50g + 25g + 6.5625gTotal remaining ≈ 81.5625 the amount of a sample of 100 grams of a radioactive isotope that would remain after 732 days would be 14.0625 grams.
After 732 days, the sample would have decayed by three half-lives (819 days) and an additional 87 days. As a result, 81.5625g of the sample will remain after 732 days. Therefore, 100g - 81.5625g = 18.4375g of the sample would have decayed in 732 days.
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Nitrogen gas, N2, reacts with hydrogen gas, H2 to form ammonia, NH3.
3 H2(g)+ N2(g) → 2 NH3(g)
If 5.40 L of ammonia gas is collected at 25.60 °C and 761.0 mmHg, how many grams of nitrogen gas are consumed? The molar mass of nitrogen gas is 28.0134 g/mol.
Answers
Ammonia has a molar mass of 17 g/mol. Ammonia weighs 68 grammes, or 17g/mol. 68g=4moles From 241 = 2 moles of nitrogen and 243 = 6 moles of hydrogen, 4 moles of ammonia will be produced. Nitrogen and hydrogen have molar weights of 28 g/mol and 2 g/mol, respectively. 56 grammes are equivalent to 2 moles of nitrogen, or 228. 6 moles of hydrogen are equivalent to 12 grammes (62).
From 50.0 grammes of the nitrogen gas 3h2 N2 --> 2nh3, how many grammes of ammonia are produced?
We need to determine how many moles of nitrogen there are in this 50 g of nitrogen gas. We would generate 1.792=3.58 moles of ammonia from this point. 3.58 mol; 17.031 gmol; 61 g of NH3
42 grammes of nitrogen may be converted into how many grammes of ammonia?
b The mass of N and H in the ammonia molecule, NH3, is equal to 14 + 3 1 = 17. The amount of H needed to react with 14 g of N is 3 g. Hence, the mass of H needed to react with 42 g of N is equal to 3/14 42 = 9 g.
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what are plasmas properties?
Answers
Answer:Plasma is highest energy state of matter.It consists of electrons,protons and neutral particles.
Explanation:(1) Plasma has a very high electrical conductivity .
(2) The motion of electrons and ions in plasma produces it's own electric and magnetic field
(3)It is readily influenced by electric and magnetic fields .
(4)It produces it's on electromagnetic radiations.
what is the molarity of a solution consisting of 6.0 moles of nacl dissolved in a total 3.0l of solution
Answers
The molarity of a solution consisting of 6.0 moles of nacl dissolved in a total 3.0l of solution is 2.0 M.
The molarity of the solution is calculated by dividing the moles of solute by the volume of solution in liters. In this case, we have 6.0 moles of NaCl dissolved in a total volume of 3.0 liters of solution.
Therefore, the molarity of the solution is:
Molarity = moles of solute / volume of solution in liters
Molarity = 6.0 moles / 3.0 liters
Molarity = 2.0 M
So, by calculating the molarity of the solution, the result is 2.0 M (M stands for molar, which is a unit of concentration).
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Label the following properties as either physical or chemical. Writ a p next to the physical properties and c next to chemical properties
95 POINTS!!!
Answers
Answer:
A: Chemical
B: physical
C: physical
D: Chemical
E: Physical
Answer:
A: Chemical
B: physical
C: physical
D: Chemical
E: Physical
Explanation:
Which of the following statements below is TRUE?
Question 18 options:
Never reach across an open flame.
Never heat closed or stoppered glassware.
Never put a glass thermometer in a flame.
All of the above.
Answers
What do the quantum numbers of electrons represent?
A. The total number of protons and electrons in the atom
B. The number of valence electrons the atom has
O C. The oxidation states most common to the atom
D. The energy levels and orbitals the electrons are in
Answers
Answer:
the energy levels and orbitals the electrons are in
Explanation:
i just took the test :)
The energy levels and orbitals the electrons are in. Hence, option D is correct.
What are atoms?An atom contains a central nucleus surrounded by one or more electrons.
The quantum numbers of electrons represent the probable distance of the electron from the nucleus. It refers to the size of the orbital and the energy level an electron is placed in.
Hence, option D is correct.
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What is the∆S° of 0₂
Answers
Answer:0
Explanation: zero because it is the most stable form of oxygen in its standard state
compare the size of ions to the size of atoms from which they form
Answers
Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. Ions are usually bigger than the atoms from which they are formed.
When an atom receives or loses electrons, the atom's electron configuration changes, resulting in a net positive or negative charge.
This net charge expands the electron cloud surrounding the nucleus, making the ion bigger in size than the neutral atoms from which it arose. When a metal atom loses one or more electrons to create a cation, it shrinks in size because the positive charge of the nucleus pulls the remaining electrons more strongly.
When a nonmetal atom obtains one or more electrons to create an anion, it normally expands in size.Because of the increasing amount of electrons, the electron cloud surrounding the nucleus grows. It should be noted that this comparison is not absolute and is dependent on the individual factors involved. Some ions are smaller than their neutral atom counterparts, while others are similar in size.
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The complete question is:
Compare the size of ions to the size of atoms from which they form.
Au HSO3 nomenclatura
Answers
How is percent yield calculated? (2 points) Measured mass of limiting reactant divided by the measured mass of the excess reactant given at the beginning of the reaction Measured mass of excess reactant divided by the measured mass of the limiting reactant used in the reaction Measured mass of product actually produced divided by calculated mass of product that should be produced by the given amount of reactants Calculated mass of product that should be produced by the given amount of reactants divided by the measured mass of product actually produced
Answers
Measured mass of product actually produced divided by calculated mass of product that should be produced by the given amount of reactants gives the percent yield. The correct option is option C.
The % ratio of the theoretical yield to the actual yield is known as the percent yield. It is calculated as the theoretical yield times by 100% divided by the experimental yield. The percent yield equals 100% if the theoretical and actual yields are equal.
Because the real yield is frequently lower than the theoretical value, percent yield is typically lower than 100%. This may be due to incomplete or conflicting reactions or sample loss during recovery. Measured mass of product actually produced divided by calculated mass of product that should be produced by the given amount of reactants gives the percent yield.
Therefore, the correct option is option C.
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Describe the structure of atoms including the masses, electrical, charges, and locations of protons, neutrons in the nucleus ,and electrons in the electron cloud.
Please make the answer short. I don't have a lot of space left on my paper.
Answers
Answer:
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge).
Explanation:
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge).
The nucleus (centre) of the atom has the protons (positively charged) and the neutrons (no charge).
How can the mass's electric charges and locations of protons neutrons and electrons different?Protons and neutrons are in the centre of the atom, creating the nucleus. Electrons wrap with the nucleus. Protons have a positive charge. Electrons have a negative charge.
Thus, The nucleus (centre) of the atom has the protons (positively charged) and the neutrons (no charge).
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What is the pH of a 0.10 M solution of carbonic acid?
Answers
The pH of a 0.10 M solution of carbonic acid is 3.12.
To calculate the pH of a solution, we use the equation pH = -log[H+], where [H+] is the concentration of hydrogen ions in the solution. In the case of carbonic acid, the dissociation equation is:
H2CO3 → H+ + HCO3-
The concentration of hydrogen ions in the solution is equal to the concentration of carbonic acid, which is 0.10 M. Plugging this value into the equation for pH, we get:
pH = -log[0.10]
pH = 3.12
Therefore, the pH of a 0.10 M solution of carbonic acid is 3.12.
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