Answers
Related Questions
How many grams are present in 0.343 kg of substance
Answers
Answer: 343 grams
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Work: Move the decimal point three times to the right, and that provides your answer.
The reaction of hypochlorite ion with iodide ion in 1 M aqueous hydroxide solution
OCl- + I- OI- + Cl-
is first order in OCl- and first order in I-.
Complete the rate law for this reaction in the box below.
Use the form k(A)m(B)n..., where '1' is understood for m, n ... (don't enter 1) and concentrations taken to the zero power do not appear.
Rate = k(OCl)-(I)
In an experiment to determine the rate law, the rate constant was determined to be 78.6 M-1s-1. Using this value for the rate constant, the rate of the reaction when
(OCl−)=1.14×10−3 M and (I)]=2.64×10^−3
Answers
Answer: The rate of the reaction is \(2.36\times 10^{-4}Ms^{-1}\)
Explanation:
Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.
\(OCl^-+I^-\rightarrow OI^-+Cl^-\)
\(Rate=k[OCl^-]^m[I^-]^n\)
where m = n = 1
\(Rate=78.6M^{-1}s^{-1}\times [1.14\times 10^{-3}M]^1\times [2.64\times 10^{-3}M]^1=2.36\times 10^{-4}Ms^{-1}\)
The rate of the reaction is \(2.36\times 10^{-4}Ms^{-1}\)
**If you have 5.0 moles of calcium, how many moles of calcium carbonate will be produced?
Answers
5.0 moles of calcium will produce 5.0 moles of calcium carbonate.
The equation for the reaction of calcium and carbon dioxide is:Ca + CO2 → CaCO3
Therefore, for every 1 mole of calcium, 1 mole of calcium carbonate will be produced.
Given: 5.0 moles of calcium
Therefore, 5.0 moles of calcium carbonate will be produced.
The reaction of calcium and carbon dioxide produces calcium carbonate. For every 1 mole of calcium, 1 mole of calcium carbonate will be produced. In this case, 5.0 moles of calcium will result in the production of 5.0 moles of calcium carbonate.
This reaction is used in a variety of applications, such as the production of cement, lime, and mortar. Calcium carbonate is also used in the production of medicines and supplements, as well as in the food industry to increase calcium levels in foods. Calcium carbonate is also used in water treatment to remove heavy metals and other contaminants. In conclusion, 5.0 moles of calcium will produce 5.0 moles of calcium carbonate.
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Imagine that you're driving through a rainstorm. You see lights in the distance but are unable to discern what they are. In this example, the stimulus does not meet your Group of answer choices differential threshold. terminal threshold. recognition threshold. absolute threshold.
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I'd like to know that I have been about Coronavirus
Which part(s) of the molecule can form a hydrophobic interaction with a suitable partner? Check all that appluy:
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In the given diagram four number means C=O
Hydrophobic interactions describe the relations between water and hydrophobes and hydrophobes are nonpolar molecules and usually have a long chain of carbons that do not interact with water molecules and the mixing of fat and water is a good example of this particular interaction the tendency of nonpolar groups or molecules to aggregate in water solution in that given image amino acid are given and in that amino acid the NH₃⁺ are in four number and water are didn't attached to NH₃⁺ ion and attached to C=O
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What allows a variety of birds to exist together in ecosystems
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Answer:
Birds have adapted to feed on different food sources.
Explanation:
List the 4 cell structures from largest to smallest
Answers
Answer: The smallest structure is the double helix while the largest is the chromosome.
2. G2 phase is the third stage in cellular division wherein the cell prepares itself for the M phase.
3. Interphase comprises of 3 phases, namely, G1 phase, G2 phase, and S phase.
4. Metaphase is known to take less amount of time to complete.
Explanation:
1. The double helix of the DNA or deoxyribonucleic acid, nucleosome, coil, supercoil, and the chromosomes are all linked to the DNA and they vary in their sizes. The nucleosome is known to be the basic unit of the eukaryotic chromosome that is composed of DNA coiled around the histones. The supercoils and coils indicate to the structures which are derived from the folding as well as wrapping of the structure of the DNA. The chromosome refers to the thread-like structure which is made up of nucleic acid and is observed in the nucleus of the living organisms.
2. Cell cycle refers to the cellular division of the cell; it is the series of events which occurs within a cell that results in duplication of the DNA or deoxyribonucleic acid as well as division of the cytoplasm and other organelles in order to generate two daughter cells. This cycle comprises of 4 phases, namely, G1, S, G2, and M phase.
The cell enters the G1 phase wherein the cell synthesizes the proteins as well as mRNA or messenger ribonucleic acid in preparation for the next upcoming phases which lead to mitosis. Next stage is the S phase wherein the synthesis of DNA takes place.
G2 phase is the next phase wherein the cell prepares itself by allowing it to grow as well as generate new proteins needed for the next phase called M phase. Mitosis is the final stage wherein the two identical daughter cells are made from one parent cell.
3. The cell cycle is broadly segregated into 3 phases, namely, interphase, M phase, and cytokinesis. Interphase is the longest stage of the cellular cycle and it comprises of 3 phases, G1 phase, S, and G2 phase. There is a G0 phase or quiescent phase. During the G1 phase, the cell prepares itself for the next phases of cell cycle, S phase involves synthesis of DNA, and G2 is the production of new proteins needed for the M phase.
4. During the mitotic phase, the parental cell segregates and produces 2 identical daughter cells. This phase is further segregated into prophase followed by metaphase, anaphase, and finally telophase. During metaphase, the chromosomes align themselves onto the equatorial or metaphase plate and the centrosomes prepare to segregate the sister chromatids. This phase takes only about 4% of the time needed to finish the entire cell cycle.
Explanation:
If the hydronium ion concentration of a substance is 1.0 X 10-6 M, what would be the pH of that substance??
Show/Describe your work.
Answers
Drops of a clear liquid are added to a red liquid. As the drops are added, the red liquid
becomes orange, then yellow. Which of the following is an indicator that a chemical
reaction occurred?
A. Formation of a precipitate
B. Emission of light
C. Color Change
D. Gas formation
Answers
Answer:
B. Color change
3&5
hope this helps <3
have a great day/night
-Dan
What happens if the amount of energy that is absorbed by the reactance is less than the activation energy?
A) The reaction does not occur
B) The reaction occurs very quickly
C) The reaction occurs very slowly
D) The reaction occurs spontaneously
Answers
Answer:
Answer 'A' is correct
Explanation:
For any reaction to occur, 4 events must occur simultaneously. These are...
1. reacting compounds must be at concentrations that allow them to find on another. Such is concentration dependent and is referred to as Kinetic Feasibility.
2. reacting compounds must collide in very specific orientations for bonding to occur. The reacting compounds have unique molecular geometries such that bonding only occurs if the compounds collide in a required orientation.
3. The reacting compounds must have a natural tendency to react and form chemical bonds.
4. The reacting system must be at sufficient temperature (which delivers sufficient energy (ΔEₐ) such that events 1, 2 and 3 have the highest probability of occurring simultaneously. This occurs at the activation energy point (k = A·e^(-ΔEₐ/RΔT) => lnΔk = lnA - ΔEₐ/RΔT) => The Arrhenius Equation of Kinetic Reactivity.
skeltal formula of all organic compounds in chemistry
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An organic compound's skeleton formula, also known as the line-angle formula or shorthand formula, is a type of molecular structural formula that acts as a shorthand for a molecule's bonding and some specifics of its molecular geometry.
What is skeltal formula?Without taking into account atoms from other elements or distinctions between single and multiple bonds, the pattern in which the carbon atoms are bound together in a molecule is referred to as the "carbon skeleton."Equations comprising only the chemical formulas of the products and reactants, no mention of state, and no atom balancing on either side of the equation are referred to as skeletal equations.An organic compound's skeletal structure is made up of a group of atoms that are joined together to form the compound's fundamental structure. Chains, branches, and/or rings of bound atoms can make up the skeleton. Heteroatoms are skeletal atoms that are not carbon or hydrogen.A chemical equation is said to be imbalanced if the total number of each element's atoms on the reactant side does not equal the total number of that element's atoms on the product side. A skeleton equation is another name for this one.An organic compound's skeleton formula, also known as the line-angle formula or shorthand formula, is a type of molecular structural formula that acts as a shorthand for a molecule's bonding and some specifics of its molecular geometry.
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What does Newton’s first law of motion state?
Answers
Answer:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... If that velocity is zero, then the object remains at rest.
Explanation:
Answer:
Before Galileo and Newton, many people thought that objects lost speed because they had a built-in natural tendency to do so. But those people weren't taking into account the multiple forces here on Earth - for example, friction, gravity, and air resistance - that cause objects to change their speed. If we could see the motion of an object in deep interstellar space, we would be able to observe the natural tendencies of an object that is free from any external influence. In deep interstellar space we would observe that if an object had a speed, it would continue to move with that speed until there was some force causing a change in its motion. Likewise, if an object were at rest in interstellar space, it would remain at rest until there was a force causing a change in its motion.
Explanation:
Hope it helped you =)
Rocks are made of a mixture of two or more of the following
Igneous b. Sedimentary c. Diamonds d. Minerals
Answers
Answer:
I beleive its sedimentary and minerals
There are 6.02 x 10^23 atoms in 4 grams of which of the following elements?
A. 4/2He
B. 7/3Li
C. 9/4Be
D. A and C
E. All of these
Answers
The molar mass of each element can be calculated using the atomic masses from the periodic table:
- The molar mass of helium (He) is 4.0026 g/mol
- The molar mass of lithium (Li) is 6.941 g/mol
- The molar mass of beryllium (Be) is 9.0122 g/mol
Using the formula for moles (moles = mass/molar mass), we can calculate the number of moles of each element in 4 grams:
- For helium: moles = 4 g / 4.0026 g/mol = 0.9996 mol
- For lithium: moles = 4 g / 6.941 g/mol = 0.5766 mol
- For beryllium: moles = 4 g / 9.0122 g/mol = 0.4435 mol
Now, we can use Avogadro's number to determine the number of atoms:
- For helium: 0.9996 mol x 6.02 x 10^23 atoms/mol = 6.02 x 10^23 atoms
- For lithium: 0.5766 mol x 6.02 x 10^23 atoms/mol = 3.47 x 10^23 atoms
- For beryllium: 0.4435 mol x 6.02 x 10^23 atoms/mol = 2.67 x 10^23 atoms
Therefore, the only element that has exactly 6.02 x 10^23 atoms in 4 grams is helium (4/2He). The answer is A.
Question 4 of 30
Scientific research shows that Earth's climate is changing due to human
activities. How can scientific research on climate change help society?
A. It can help us stop storms before they occur.
B. It can help us find a new way to make more water.
C. It can help us track how quickly elements of the climate are
changing
D. It can help us reverse the effects of climate change.
th
Answers
C. It can help us track how quickly element of the climate are changing
How many total atoms are there in 19.3 g of hydrazine (N_{2}*H_{2})
Answers
Given the following parameters
Mass of hydrazine = 19.3 grams
Determine the moles of hydrazine
\(\begin{gathered} moles\text{ of N}_2H_2=\frac{mass}{molar\text{ mass}} \\ moles\text{ of N}_2H_2=\frac{19.3}{30.02928} \\ moles\text{ of N}_2H_2=0.6423moles \end{gathered}\)According to the Avogadro's constant
\(1mole\text{ of a substance}=6.02\times10^{23}atoms\)\(\begin{gathered} atoms\text{ of N}_2H_2=0.643\times6.02\times10^{23} \\ atoms\text{ of N}_2H_2=3.87\times10^{23}atoms \end{gathered}\)Therefore the total atoms that are there in 19.3 g of hydrazine is 3.87 * 10^23 atoms
Why do you need to remove carbon dioxide and water vapour to produce liquid air
Answers
Answer:
because these substances solidify when cooled and would clog the pipes of the air liquefaction plant.
How to find total mass of water in final solution
Answers
Answer:
Explanation:
Just like a solid, the density of a liquid equals the mass of the liquid divided by its volume; D = m/v. The density of water is 1 gram per cubic centimeter.
How many atoms of phosphorus are in 8.80
mol of copper(II) phosphate?
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By the concept of calculating moles ,it can br concluded that the no. of atoms of phosphorus in 8.80mol of copper(II) phosphate is=1.06\(x10^{25}\)
A mole is defined as amount of substance containing as many as elementary entities that are there in atoms of exactly 12 g of carbon-12.Therefore we can say,1 mole of copper(II) phosphate, Cu3(PO4)2, contains three moles of copper(II) cations and two moles of phosphate anions.
Again 1mole of phosphate anions contains one mole of phosphorus and four moles of oxygen.Considering all these informations we can conclude that:1 mole of copper(II) phosphate contains 2 moles of Phosphorus
Accordingle the sample contains=(8.80\(x\)2) moles of Phosphorus
=(17.6\(x\)Avogadro's constant) atoms of Phosphorus
=(17.6\(x\)6.022\(x\)\(10^{23}\)) atoms of Phosphorus
=1.06\(x10^{25}\) [approx] no. of Phosphorus atoms
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In 8.80 moles of copper(II) phosphate, there are approximately 1.06 x 10²⁵ atoms of phosphorus.
Explanation:The number of atoms of phosphorus in a given amount of a compound can be calculated using the concept of mole in chemistry. Copper(II) phosphate is Cu3(PO4)2, containing 2 moles of phosphorus (P) for every 1 mole of the compound. Avogadro's number (6.022 x 10²³) gives the number of atoms in one mole.
So, if there are 8.80 moles of copper(II) phosphate, there would be 2 × 8.80 moles of phosphorus. Multiplying this by Avogadro's number gives the total number of phosphorus atoms.
Therefore, the number of phosphorus atoms is 2 × 8.80 × 6.022 x 10²³ = 1.06 x 10²⁵ atoms of phosphorus.
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A precipitate will form when a freshly prepared aqueous carbonic acid solution is added to an aqueous solution of
Answers
Answer:
A precipitate will form when a freshly prepared aqueous carbonic acid solution is added to an aqueous solution of Calcium Hydroxide.
Explanation:
A precipitate will form when a freshly prepared aqueous carbonic acid
solution reacts with an aqueous solution of Calcium Hydroxide
Ca(OH)₂ + H₂CO₃ → CaCO₃ + 2 H₂O
This is an example of a neutralization reaction between the acid ( H₂CO₃)
and a base ( Ca(OH)₂ ) to form a precipitate known as Calcium
carbonate(CaCO₃).
The product which is Calcium carbonate(CaCO₃) is also referred to as calcite
or chalk.
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C4H10 + 02 ➡️ H20 + CO2
balance the equation
Answers
(Can I have Brainlist)?
Answer:
2C4H10 + 13O2 —> 8CO2 + 10H2O. Oxidation reaction
8 (4 moles CO2 per mole butane)
Explanation:
could be written C4H10 + 6 1/2 O2 —> 4CO2 + 5H2O
I need help calculating the error % in molar mass
Answers
Error % = |(experimental - actual) / actual| x 100%
For example, let's say the actual molar mass of a compound is 100 g/mol, and the experimental molar mass determined in the lab is 95 g/mol. The error percentage would be:
Error % = |(95 - 100) / 100| x 100%
Error % = |-0.05| x 100%
Error % = 5%
Therefore, the error percentage in molar mass is 5%
What is the limiting reagent for the reaction, how much of the excess reagent is left over in this reaction? CuCl2+2NaNO3=Cu(NO3)2+2NaCl15 grams of copper chloride with 20 grams of sodium nitrate 11.3 grams of sodium chloride is formed
Answers
Step 1
The reaction must be written and balanced:
CuCl2 + 2NaNO3 = Cu(NO3)2 + 2NaCl
------------
Step 2
The limiting reagent
Information needed:
The molar masses of CuCl2 (134,4 g/mol) and NaNO3 (84,9 g/mol)
By stoichiometry:
1 mole CuCl2 = 134.4 g
1 mole NaNO3 = 84.9 g
134.4 g CuCl2 ---------- 2 x 84.9 g NaNO3
15 g CuCl2 ---------- X = 18.95 g NaNO3
For 15 g CuCl2, 18.95 g of NaNO3 is needed, but there is 20 g. Therefore, The limiting reagent is CuCl2 and the excess is NaNO3
----------
Step 3
Amount of the excess reagent leftover:
20 g NaNO3 - 18.95 g NaNO3 = 1.05 g leftover
Answer:
The limiting reagent = CuCl2
The amount of excess leftover = 1.05 g NaNO3
If 0. 25 mol m o l of br2 b r 2 and 0. 55 mol m o l of cl2 c l 2 are introduced into a 3. 0- l l container at 400 k k , what will be the equilibrium concentration of br2 b r 2 ?.
Answers
The equilibrium concentration of Br2 in the container will be 0.0376 M at 400 K.
What is equilibrium concentration?Equilibrium concentration is described as a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction.
The reaction is given as :
Br2 + Cl2 ⇌ 2BrCl
The equilibrium constant expression for the above reaction is:
Kc = [BrCl]^2 / [Br2][Cl2]
Given initial moles of Br2 and Cl2, we can calculate their initial concentrations as follows:
[Br2] = 0.25 mol / 3.0 L = 0.0833 M
[Cl2] = 0.55 mol / 3.0 L = 0.1833 M
Assuming that x moles of Br2 react to form 2x moles of BrCl.
Therefore, the equilibrium concentrations of Br2, Cl2, and BrCl will be:
[Br2] = 0.0833 - x
[Cl2] = 0.1833 - x
[BrCl] = 2x
Kc = [(2x)^2] / [(0.0833 - x)(0.1833 - x)]
x = 0.0457 mol
In conclusion, the equilibrium concentration of Br2 is:
[Br2] = 0.0833 - 0.0457 = 0.0376 M
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it’s science middle school
What cell structure use energy
from
sunlight to make food molecules?
c. nucleus
a. cell wall
b. cytoskeleton
d. chloroplast
Answers
how would you expect your pkin value to be different if you did not make the corrections to a {616nm}^{green} and a {453nm}^{green}
Answers
It should be noted that pKIn is the pH at which the indicator changes colour.
What is pH?In chemistry, the pH scale is used to define the acidity or basicity of an aqueous solution. Formerly, pH stood for "potential of hydrogen." The pH values of acidic solutions are lower than those of basic or alkaline solutions.
pKIn is the pH at which the indicator changes colour. Also, you can get given the Ka value and told to work out the pH. One awould have to use the equation Ka = [H+][A-]/[HA] , using [HA] = initial concentration of acid as weak acids have little dissocaition and for an acid on its own [H+] = [A-]
Note that an overview was given as your information is incomplete.
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What waves are used to send signals because they can travel over very long distances and pass through buildings
Answers
Answer:
sound waves for used I think
How many moles of Cl in 2.6 mol CaCl2
Answers
Answer: There are 5.2 moles of Cl are present in 2.6 mol \(CaCl_{2}\).
Explanation:
Given: Moles of \(CaCl_{2}\) = 2.6 mol
In a molecule of \(CaCl_{2}\) there are 2 atoms of chlorine present. Therefore, moles of chlorine are present as follows.
\(2.6 mol CaCl_{2} \times \frac{2 mol Cl_{2}}{1 mol CaCl_{2}}\\5.2 mol Cl_{2}\)
Thus, we can conclude that there are 5.2 moles of Cl are present in 2.6 mol \(CaCl_{2}\).
Draw the structure of phosphatidylserine and discuss its components
Answers
Phosphatidylserine is a type of phospholipid that is mainly found in cell membranes. Its structure is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule.
The fatty acid chains are hydrophobic, meaning they repel water, while the phosphate group and serine molecule are hydrophilic, meaning they attract water.
The glycerol molecule acts as a bridge that connects the two fatty acid chains to the phosphate group and serine molecule.
The structure of phosphatidylserine is important for its function in the cell membrane.
Because of the hydrophobic and hydrophilic components of its structure, phosphatidylserine is able to form a lipid bilayer, which is a barrier that separates the inside of the cell from the outside environment.
The hydrophilic heads of the phosphatidylserine molecules face outward and interact with water, while the hydrophobic tails face inward and repel water.
Phosphatidylserine also plays a role in cell signaling and apoptosis, which is programmed cell death.
It acts as a signaling molecule by binding to proteins that are involved in cellular pathways.
In addition, phosphatidylserine is translocated to the outer leaflet of the cell membrane during apoptosis, which signals to immune cells that the cell is ready to be removed.
In conclusion, the structure of phosphatidylserine is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule. Its hydrophobic and hydrophilic components allow it to form a lipid bilayer in cell membranes, and it also plays a role in cell signaling and apoptosis.
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A solution of aluminum chloride has a pH of (4.5x10^0). What is the [H3O*(aq)], in mol/L?
Note: Your answer is assumed to be reduced to the highest power possible.
Answers
The concentration of H3O+ ions in the solution of aluminum chloride is \(3.16×10^-5\) mol/L.
Aluminum chloride is an acidic salt that contains a cation, Al3+, and an anion, Cl-. When aluminum chloride is dissolved in water, it dissociates into its constituent ions, and the Al3+ cations hydrolyze to produce H+ ions.
This reaction leads to the formation of an acidic solution. The pH of a solution of aluminum chloride is \(4.5×10^0\). We need to determine the concentration of H3O+ ions in this solution.
The concentration of H3O+ ions in a solution is given by the equation: pH = -log[H3O+] where pH is the negative logarithm of the concentration of H3O+ ions in the solution. The negative sign indicates that the pH is inversely proportional to the concentration of H3O+ ions. To determine the concentration of H3O+ ions, we need to rearrange the equation:
[H3O+] = \(10^-pH\) Substituting the value of pH =\(4.5×10^0\), we get: [H3O+] = \(10^-4.5\)
The value of \(10^-4.5\) can be calculated using scientific notation: \(10^-4.5\)= \(3.16×10^-5\) mol/L
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