Answer:
created nor destroyed.
calculate the percentage of sodium and carbon and oxygen in sodium carbonate
True of false
nad + and fad are also used to shuttle energy from the favourable oxidations that take place in anabolism, to the unfavourable reactions that take place in catabolism.
Answer:
true
Explanation:
If you have a 8.6 mol of AlCl3 in a 6.8 M solution, how many Liters does it make?
Answer: 1.3 L
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
To calculate the volume for given molarity, we use the equation:
[tex]\text{Molarity of the solution}=\frac{\text{moles of solute}}{\text{Volume of solution in L}}[/tex]
[tex]6.8M=\frac{8.6mol}{\text{Volume of solution in L}}[/tex]
[tex]\text{Volume of solution in L}=1.3[/tex]
Thus the volume in Liters is 1.3
What is the purpose of striking a match the side of the match
Answer:
The ridges on the side of the match and the match tip rub against each other which makes friction and that friction creates a spark and the match lights up.
Explanation:
A solution contains 6 mg isopropanol dissolved in 2 kg H2O. The isopropanol concentration is?
Answer:
the concentration of isopropanol is 3 ppm.
Explanation:
The isopropanol concentration is
As we know that
Concentration = mass isopropanol ÷mass of water
= 6 mg ÷ 2 kg
= 3 mg/Kg
Now convert 3 mg/Kg to ppm.
As we know that
1 mg/Kg = 1 ppm
So,
3 mg/Kg = 3 ppm
Hence, the concentration of isopropanol is 3 ppm.
Help please it’s due in 3 minutes
Answer:
A
Explanation:
Both students are Pushing/Pulling towards the same direction meaning if enough force is applied the object will move into that direction
A chemical plant produces ammonia using the following reaction at high
temperature and high pressure. Which issue are plant engineers and
investors most likely to see as a drawback of this method?
3H2 + N2 = 2NH3 + energy
A. This reaction system will solidify at a higher temperature and
obstruct the equipment.
B. The high temperature will increase the rate of the reactant-favored
reaction at equilibrium.
C. The high pressure will increase the rate of the reactant-favored
reaction at equilibrium.
D. Maintaining a high temperature will require burning fossil fuels or
using a great deal of electricity.
Answer:
D. Maintaining a high temperature will require burning fossil fuels or
using a great deal of electricity.
Explanation:
The chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.
What is the chemical plant?An industrial processing facility known as a "chemical plant" produces chemicals, typically on a large scale.
What are fossil fuels?The components of fossil fuels are decaying plants or animals. These fuels may be consumed to provide energy and could be discovered in the crust of the Earth. Fossil fuels include, for example, coal, oil, as well as natural gas.
Therefore, the chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.
Hence, the correct answer will be option (D)
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Dissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter at 22.4 o C causes the temperature to rise to 25.8 o C. What is the approximate amount of heat involved in the dissolution, assuming the specific heat of the resulting solution is 4.18 J/g o C? Is the reaction exothermic or endothermic?
Answer:
Explanation:
Heat involved Q = mcΔt where m is mass , c is specific heat of water and Δt is rise in temperature
= 150 x 4.18 x 25.8 J .
= 16176.6 J .
As the temperature rises , the reaction is exothermic.
what explains the bonding in a compound made from carbon and hydrogen
1) ch4 because every hydrogen gets two electrons to bond
2) ch4 because 8 electrons are shared in this molecule
Answer:
2) ch4 because 8 electrons are shared in this molecule
Explanation:
The bond between carbon and hydrogen in the molecule; CH4 is a covalent bond. This bond involves sharing of electrons. Carbon has a valency of 4 and needs four more electrons to complete it's electronic configuration. These 4 electrons are taken care of by the 4 hydrogen atoms which each have a valency of 1.
NO GO*GLE ANSWERS PLEASE!
Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal, X-ray light is transmitted through the material, and visible light is reflected off the metal. Tyrel wonders if the metal will get warm if he shines the lights on it.
Answer:
Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal. X-ray light is transmitted through the metal. ... Yes, light can cause the metal to get warm because light carries energy.
What is the maximum number of bonds that can occur between two atoms?
One
Two
Three
Four
Five
it can occur 5 atoms
Explanation:
that is base on my study
A 9.56 sample of CuS is found to contain 6.35 g of copper what is the percent by mass of the copy and sulfur in this compound? (show your work)
Answer:
%Cu = 66.4%
%S = 33.6%
Explanation:
Step 1: Given data
Mass of CuS: 9.56 gMass of Cu: 6.35 gStep 2: Calculate the mass of S
The mass of CuS is equal to the sum of the masses of Cu and S.
mCuS = mCu + mS
mS = mCuS - mCu
mS = 9.56 g - 6.35 g = 3.21 g
Step 3: Calculate the percent by mass of each element
We will use the following expression.
%Element = mElement / mCompound × 100%
%Cu = mCu / mCuS × 100% = 6.35 g / 9.56 g × 100% = 66.4%
%S = mS / mCuS × 100% = 3.21 g / 9.56 g × 100% = 33.6%
TEST QUESTION FOR CHEMISTRY GENIUSES ONLY...
Answer:
HBr has an electronegativity difference of .76 because Hydrogen's electronegativity is 2.2 and the electronegativity of Bromide is 2.96, and by the chart, it has a polar-covalent bond
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what did scientists mix to make the savanna cat
How many moles are in 3.2 x 10^25 atoms of silver?
53 mol Ag
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 3.2 × 10²⁵ atoms Ag
[Solve] moles Ag
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 3.2 \cdot 10^{25} \ atoms \ Ag(\frac{1 \ mol \ Ag}{6.022 \cdot 10^{23} \ atoms \ Ag})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 53.1385 \ mol \ Ag[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
53.1385 mol Ag ≈ 53 mol Ag
In the addition reaction of HI to 2-methyl-2-butene, the Markovnikov addition mechanism involves: Group of answer choices attack of 2-methyl-2-butene initiated by an iodine atom. formation of a carbocation at carbon two (C-2). isomerization of 2-iodo-2-methylbutene. formation of carbocation at carbon three (C-3). attack of 2-methyl-2-butene initiated by an iodide ion
Answer:
formation of a carbocation at carbon two (C-2)
Explanation:
Markovnikov rule states that; "When a protic acid HX (X = Cl, Br, I) is added to an asymmetrically substituted alkene, addition of acidic hydrogen takes place at the less substituted carbon atom of the double bond, while halide X is added to the more alkyl substituted carbon atom" (Chemistry Learner).
Hence, in the addition of HI, H is first added to the C-3(less substituted carbon atom of the double bond). This creates a tertiary carbocation at C-2 which is more stable. Addition of the iodide ion subsequently leads to a Markovnikov product.
Which statement best explains how weather is related to the water
cycle?
Answer:
Increased evaporationof water vapour from sea or land will increase rainfall
Answer:
Explanation:
increased evaporation of water vapor from sea to land will increase rainfall
Which of the following is a strong acid?
O HF
ОКОН
O HCIO4
O HCIO
O HBrO
Hydrofluoric acid and water react to form fluoride anion and hydronium cation, like this:
HF(aq) + H2O(I) rightarrow F-(aq) + H3O+(aq)
At a certain temperature, a chemist finds that a 5.6 L reaction vessel containing an aqueous solution of hydrofluoric acid, water, fluoride anion, and hydronium cation at equilibrium has the following composition:
Compound Amount
HF 1.62 g
H2O 516 g
F- 0.163 g
H3O+ 0.110 g
Calculate the value of the equilibrium constant for this reaction.
Answer: The value of the equilibrium constant is 0.000023.
Explanation:
Equilibrium concentration of [tex]HF[/tex] = [tex]\frac{1.62g}{20.01g/mol\times 5.6L}=0.014M[/tex]
Equilibrium concentration of [tex]H_2O[/tex] = [tex]\frac{516g}{18g/mol\times 5.6L}=5.12M[/tex]
Equilibrium concentration of [tex]F^-[/tex] = [tex]\frac{0.163g}{18.9g/mol\times 5.6L}=0.0015M[/tex]
Equilibrium concentration of [tex]H_3O^+[/tex] = [tex]\frac{0.110g}{18g/mol\times 5.6L}=0.0011M[/tex]
The given balanced equilibrium reaction is,
[tex]HF(aq)+H_2O(l)\rightleftharpoons F^-(aq)+H_3O^+(aq)[/tex]
The expression for equilibrium constant for this reaction will be,
[tex]K_c=\frac{[F^-]\times [H_3O^+]}{[HF]\times [H_2O]}[/tex]
[tex]K_c=\frac{(0.0015\times 0.0011}{(0.014\times 5.12)}[/tex]
[tex]K_c=0.000023[/tex]
Thus the value of the equilibrium constant is 0.000023.
The number of moles of carbon dioxide which contain 8g of oxygen is
Answer:
0.25 mole of CO₂
Explanation:
We'll begin by calculating the mass of oxygen in 1 mole of carbon dioxide (CO₂). This is illustrated below:
Molecular formula of carbon dioxide
=> CO₂
Mass of oxygen in CO₂ = 2O
= 2 × 16
= 32 g
Thus, 1 mole of CO₂ contains 32 g of oxygen.
Finally, we shall determine the number of mole of CO₂ that contains 8 g of oxygen. This can be obtained as follow:
1 mole of CO₂ contains 32 g of oxygen.
Therefore, Xmol of CO₂ will contains 8 g of oxygen i.e
Xmol of CO₂ = 8/32
Xmol of CO₂ = 0.25 mole
Thus, 0.25 mole of CO₂ contains 8 g of oxygen.
A beach ball and a bowling ball were sitting on a shelf. Someone bumped the shelf and the bowling ball and beach ball rolled off
the shelf at the same time. They both hit the ground at the same
time and had the same speed.
Which of these statements correctly compares the kinetic energy
of the two objects just before they hit the ground?
A The bowling ball had more kinetic energy because it
had less potential energy when it was on the shelf.
B The bowling ball had more kinetic energy because it
has more mass.
C Both balls had the same kinetic energy because they
had the same speed.
D Both balls had the same kinetic energy because they had the same potential energy when they were on the
shelf.
Answer: i think its b
Explanation:
What’s this key name !!!!!
A gas
A. has a definite shape but no definite volume.
B. Has both a definite shape and a definite volume.
C. Has a definite volume but no definite shape.
D. Has no definite shape and no definite volume.
Answer:
D
Explanation:
Has no definite shape and no definite volume
how many grams are contained in 4.56 moles of krypton, Kr
Pick the answer that correctly spells a layer of the atmosphere.
A. Mesosphere
B. Thermsphere
C. Mezosphere
D. Tropshere
E. Thermoshere
The correct answer is option A; Mesosphere
The mesosphere is defined as the part atmosphere found above the stratosphere but below the thermosphere.
In this layer of the atmosphere, temperature decreases with height. It covers about 50 to 85 km above the earth.
Mesosphere is the only layer of the atmosphere that was correctly spelt among the options.
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A gas occupies 5.0 cubic meters at a temperature of 600. K. If the temperature is lowered to 300. K at constant pressure, the new volume occupied by the gas will be:
Answer:
[tex]V_2=2.5m^3[/tex]
Explanation:
Hello!
In this case, according to the Charles' law as a directly proportional relationship between volume and temperature:
[tex]\frac{V_2}{T_2}=\frac{V_1}{T_1}[/tex]
Thus, in order to compute the final volume, V2, we obtain the following expression:
[tex]V_2=\frac{V_1T_2}{T_1}\\\\V_2=\frac{5m^3*300K}{600K}\\\\V_2=2.5m^3[/tex]
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A new substance with unique chemical and physical properties formed when two or more elements are chemically bonded during a physical reaction.
Answer:
A compound
Explanation:
Chemical compound can be regarded as any substance made up of identical molecules which consists atoms of two or more than two chemical elements. For example four hydrogen atoms bonds with a carbon atom to give methane molecule which is a compound. It should be noted that A compound is a new substance with unique chemical and physical properties formed when two or more elements are chemically bonded during a physical reaction.
calculate the wavelength of the first line in the lymen series of hydrogen spectrum
Draw a mechanism for this reaction. In the reaction scheme, an acyl chloride reacts with an acid to give an acid anhydride. The acyl chloride contains a central C atom that has a double bond to O, a single bond to Cl, and a single bond to a benzene ring. The acid is CH3COH with an O atom double-bonded to the second (from left to right) carbon. The produced anhydride is COCCH3 with a benzene ring attached to the first (from left to right) carbon and an O atom double-bonded to the firth and the second carbons.
Answer:
See explanation and image attached
Explanation:
The reaction shown here is the reaction between an acyl chloride and a carboxylic acid. This reaction produces an acid anhydride.
The first step in the reaction is the nucleophillic attack of the acid on the acyl carbon of the acyl chloride. This is followed by loss of HCl to yield the acid anhydride as shown in the image attached.
The product formed is PhCOOCOCH3.
Given the following balanced equation, determine the rate of reaction with respect to [SO3]. If the rate of O2 loss is 3.56 x 10-3 M/s, what is the rate of formation of SO3?
Answer:
7.12 × 10⁻³ M/s
Explanation:
Step 1: Write the balanced reaction
2 SO₂ + O₂ ⇒ 2 SO₃
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of O₂ to SO₃ is 1:2.
Step 3: Calculate the rate of formation of SO₃
The rate of loss of O₂ is 3.56 × 10⁻³ mol O₂/L.s. The rate of formation of SO₃ is:
3.56 × 10⁻³ mol O₂/L.s. × 2 mol SO₃/1 mol O₂ = 7.12 × 10⁻³ mol SO₃/L.s