Answers
Explanation:
hope you can see the pic
I already solved it in the pic I uploaded
Related Questions
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)
Answers
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%
label the sun. which layer of the sun is #4?
Answers
Answer:
is D I guess; photosphere
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.
Answers
Answer: i think its b
Explanation:
what did scientists mix to make the savanna cat
Answers
The process of shedding an outgrown exoskeleton.
Answers
Answer:
Mouthing is the answer to your question
What is the maximum number of bonds that can occur between two atoms?
One
Two
Three
Four
Five
Answers
it can occur 5 atoms
Explanation:
that is base on my study
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.
Answers
Answer:
D
Explanation:
Has no definite shape and no definite volume
If you have a 8.6 mol of AlCl3 in a 6.8 M solution, how many Liters does it make?
Answers
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
Pick the answer that correctly spells a layer of the atmosphere.
A. Mesosphere
B. Thermsphere
C. Mezosphere
D. Tropshere
E. Thermoshere
Answers
Good luck bye
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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how many grams are contained in 4.56 moles of krypton, Kr
Answers
Air movement can affect how quickly evaporation occurs.
O True
O False
Answers
What is the vapor pressure of CH3COOH and 90*C?
Answers
Answer:
40.kPa hope this helps....
A solution containing 1.50 mM ethanol and 2.40 mM methanol gave peak areas of 1487 and 3544, respectively. Subsequently, 2.00 mL of 3.2 mM methanol was added to a 7.00 mL unknown ethanol and diluted to 10.00 mL. The final solution gave peak areas of 6235 and 4487 for ethanol and methanol, respectively. Calculate the concentration of ethanol in the original unknown.
Answers
Answer:
8.99mM is the concentration of ethanol in the original unknown.
Explanation:
In chromatography, the peak areas of compounds are proportional to its concentration. The ratio of Area/Concentration for ethanol and methanol is:
Ethanol = 1487 / 1.50mM = 991,33 mM⁻¹
Methanol = 3544 / 2.40mM = 1476.67mM⁻¹
The concentration of ethanol in the diluted solution is:
6235 / 991.33mM⁻¹ = 6.29mM
The original solution was diluted from 7mL to 10mL, the concentration of the original solution is:
6.29mM * (10mL / 7mL) =
8.99mMDraw 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.
Answers
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.
What’s this key name !!!!!
Answers
3.15 mol of an unknown solid is placed into enough water to make 150.0 mL of solution. The solution's temperature increases by 19.21°C. Calculate ∆H, in kJ/mol, for the dissolution of the unknown solid. (The specific heat of the solution is 4.184 J/g･°C and the density of the solution is 1.20 g/mL).
Answers
Hope this helps!!!! :)
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?
Answers
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
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:
Answers
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]
Best regards!
A solution contains 6 mg isopropanol dissolved in 2 kg H2O. The isopropanol concentration is?
Answers
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.
A new substance with unique chemical and physical properties formed when two or more elements are chemically bonded during a physical reaction.
Answers
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.
What is the chemical name for OBr2?
Answers
Answer:
The answer is oxygen difluoride
Explanation:
Hope this helped Mark BRAINLEST!!!!
In the given question, the chemical name for [tex]\rm OBr_2[/tex] is oxygen dibromide.
A chemical name is a unique name given to a chemical compound that accurately describes its chemical composition.
The suffix "di-" means two, and "bromo" refers to the presence of two bromine atoms in the compound. The prefix"-oxygen" indicates that the compound contains oxygen.
Therefore, oxygen dibromide is the chemical name for [tex]\rm OBr_2[/tex]. It is a covalent compound and has oxygen as a central atom.
Learn more about chemical name here:
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What is the phase label on CI?
A. aq
B.
C. e
D. g
E. s
Answers
Answer:
Pubic hair smells bad
Explanation:
What is the purpose of striking a match the side of the match
Answers
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:
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
Answers
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.
How many MOLECULES are in 50.0 grams of lithium phosphate
Answers
Answer:
115.794361
Explanation:
this is the answer please mark me as brainleist
Answer:
115.794361
Explanation:
that would be the correct answer
Which is NOT a goal of the United Nations?
A. Maintain World Peace
B. Fight
C. Discuss Issues
D. Cooperation
Answers
Answer:
B.Fight...............
what is the difference between zinc and magnesium
Answers
can someone help with this please. i will give brainliest
Answers
Answer:
Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light.
The electromagnetic radiations consist of radio waves, microwaves, infrared ,Visible , ultraviolet, X rays and gamma rays arranged in order of increasing frequency and decreasing wavelengths.
The visible reagion contains Violet , Indigo , Blue , Green , Yellow , Orange and Red in order of increasimg wavelength and decreasing frequency.
The number of moles of carbon dioxide which contain 8g of oxygen is
Answers
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.
It is device used to measure thee temperature of food/fish