Answer: About 0.20 grams of copper (II) is formed, and some aluminum is left in the reaction mixture
Answer:Answer B: About 0.20 grams of copper (II) is formed, and some aluminum is left in the reaction mixture
Explanation:
(i)What happens when an aqueous solution of sodium sulphate reacts with an aqueous
solution of barium chloride ? (i) Write the balanced chemical equation for the reaction which takes place.(ii) Name the type of chemical reaction which occurs. Define.
Explanation:
2nacl+baso4
the orginal equation is
Na2so4+Bacl2
then na react with cl and ba react with so4
Which statement describes the law of conservation of energy? A. All systems will exchange matter and energy with their surroundings. B. All systems can exchange energy, but not matter, with their surroundings. C. Energy cannot be created nor destroyed, but it changes from one form to another. D. Energy is destroyed in most chemical reactions when new products are formed.
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Answer:
C, energy cannot be created nor destroyed.
Explanation:
ch3cooh number of bonding pairs and lone pairs.
Answer:
whats the question?
Explanation:
Deep sea divers can experience the bends due to an increased amount of nitrogen in the blood
with higher pressure if they dive deeper than 40 meters and come up too fast. If at 1.05 atm
(surface conditions) the solubility of nitrogen, N2, is 21.1 mg/L, what is the solubility at this 40m
depth where the pressure is 4.97 atm?
a. 21.1 mg/L
b. 42.2 mg/L
C. 49.9 mg/L
d. 99.9 mg/L
b is the correct answer
Answer: D. 99.9mg/L
Explanation:
21.1x4.97/1.05=99.9
g You are testing the adsorptive properties of a new material (with very small particles), using methylene blue. You are in a rush and decide you don't have time to centrifuge your samples before measuring the dissolved concentration. What effect might you expect to see in your data
Answer:
The data will be error free and more correct.
Explanation:
The data will show no error while testing the adsorptive properties of a new material if no centrifuge method is not used because there is no need for centrifuge method. For determining the adsorptive properties of a new material, we can measure the data after dissolving . Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface while on the other hand, Centrifugation is the process where a mixture is separated from one another through fast spinning. so for determining the adsorptive properties, no centrifugation process is required and we get the correct data without centrifugation.
what is hard water??
Answer:
Hard water is any water that does not lather easily with soap. pipe water is an example of hard water.
I hope this helps . good luck.
A 2.00 L flask is filled with propane gas (C3H8) at a pressure of 1.10 atm and a temperature of 258 K. What is the mass of propane in the flask?
Answer:
m = 4.58 g.
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to realize this problem is solved via the ideal gas equation:
[tex]PV=nRT[/tex]
As we can calculate the moles of propane given the pressure, temperature and volume as shown below:
[tex]n=\frac{PV}{RT} \\\\n=\frac{1.10atm*2.00L}{0.08206\frac{atm*L}{mol*K}*258K} \\\\n=0.104mol[/tex]
Finally, since the molar mass of propane is 44.1 g/mol, we calculate the mass by following the shown below mole-mass conversion factor:
[tex]m=0.104mol*\frac{44.1g}{1mol}\\\\m= 4.58g[/tex]
Regards!
Please hurry!!! And help!!
*URGENT*
Best answer gets marked Brainliest!
NO LINKS or question will be REPORTED!
Why is elemental zinc considered a pure substance
A) it is a metal
B) it is a mixture of different atoms
C) it must be created in a lab
D) all elements are considered pure substances
Answer:
D
Explanation:
Answer:
D
Explanation:
Because it is true
HEEELP! What are some examples of nuclear fusion? Select all the correct answers.
A: Being the power source of stars
B: Forming heavier elements from light elements
C: Generating electricity in power plants
D: Being used in thermonuclear weapons
E: Supplying the power source in nuclear submarines
Answer:
A B D
Explanation:
Answer: A: Being the power source of stars
B: Forming heavier elements from light elements
D: Being used in thermonuclear weapons
Explanation: (Edmentum)
Describe the process of making 1.0 L of a 0.03 M solution of cobalt (II) chloride from the solid state. Be sure to include all instrumentation and glassware.
Answer:
By measuring out 3.9 grams of cobalt (II) chloride up to a volume of 1.0 L of solution.
Explanation:
Hello there!
In this case, considering this question about molarity, it turns out possible for us to calculate the required mass of cobalt (II) chloride by firstly compute the moles present in 1.0L of the given 0.03-M solution:
[tex]M=\frac{n}{V} \\n=V*M\\\\n=1.0L*0.03\frac{molCoCl_2}{L}\\\\n=0.03molCoCl_2[/tex]
Next, since the molar mass of cobalt (II) chloride is 129.84 g/mol, we compute the grams we need to measure out in order to prepare this solution:
[tex]m_{CoCl_2}=0.03molCoCl_2*\frac{129.84gCoCl_2}{1molCoCl_2} \\\\m_{CoCl_2}=3.9gCoCl_2[/tex]
Regards!
In this image, which fundamental interaction is responsible for attracting the electron?
a. electromagnetism
b. nuclear weak force
c. gravitation
d. nuclear strong force
Answer:
a.
Explanation:
electromagnetism
34. Which statement describes what occurs in the
following redox reaction?
Cu(s) + 2Ag (aq) → Cu2+ (aq) + 2Ag(s)
(1) Only mass is conserved.
(2) Only charge is conserved.
3 Both mass and charge are conserved.
(4) Neither mass nor charge is conserved.
Answer:
3 Both mass and charge are conserved.
Explanation:
The equation of the reaction is;
Cu(s) + 2Ag+ (aq) → Cu2+ (aq) + 2Ag(s)
A redox reaction is an acronym for oxidation-reduction reaction. This refers to a reaction in which the oxidation number of one specie is increased while the oxidation number of the other specie is decreased.
This means that one specie looses electrons while the other specie gains electrons. Here, Cu(s) looses electrons while Ag+(aq) gains electrons from left to right in the reaction.
In a redox reaction, both mass and charge are conserved. This means that the total mass and charge on the reactants side is the same as the total mass and charge on the products side.
Is anyone good at chemistry if so Is it possible could someone help me please
NO LINKS I REPEAT NO LINKS
344.0 / 68.8 = 5 (no.of half life that have elapsed)
Mass remains = (1/2)^n × (original mass)
= (1/2)^5 × 200
= (0.5) ^5 × 200
= 0.03125 × 200
= 6.25 grams
What are the IUPAC name?
Answer:
IUPAC
Explanation:
International Union of Pure and Applied Chemistry
Name one common base that is NOT harmful to the body when ingested AND a product, or way, in which it is used.
Answer:
well when you eat some food you will get many tastes mixed with base and acid but salt from NA2CO3 can be a base if it is contained with weak acid.
Explanation:
Basically SALT can be one common base that is NOT harmful to the body when ingested AND a product, or way, in which it is used.
Magnesium hydroxide (Mg(OH)2) is not harmful to our body when ingested AND a product, or way, in which it is used. It is commonly used to get relief from acidity, that is caused when our stomach releases excessive acid. It neutrelises the acid and gives us relief. It is also called Milk of Magnesia commonly.
match the following
Of scinece chapter
from E=mc²=hv show that wavelength=h/mv
Explanation:
To show - from E=mc²=hv show that wavelength=h/mv
Proof -
Given that,
E = mc²
E = hν
By equating both the equations, we get
mc² = hν
Because real particles do not travel at the speed of light, De Broglie submitted velocity ( v ) for the speed of light ( c ).
mv² = hν
Through the equation λ , de Broglie substituted v/λ for ν and arrived at the final expression that relates wavelength and particle with speed.
mv² = hv/λ
⇒λ = hv/mv²
⇒λ = h/mv
Hence showed.
A 0.457-M aqueous solution of (CH3)2NH (dimethylamine) has a pH of 12.2. Calculate the pH of a buffer solution that is 0.457 M in (CH3)2NH and 0.280 M in (CH3)2NH2 .
Answer:
pH = 10.95
Explanation:
To solve this question we must, as first, find pKb of dimethylamine. Then, using H-H equation we can solve the pH of the buffer:
pKb dimethylamine:
Based on the equilibrium:
(CH3)2NH(aq) + H2O(l) ⇄ (CH3)2NH2⁺(aq) + OH-(aq)
Kb is defined as:
Kb = [OH-] [(CH3)2NH2⁺] / [(CH3)2NH]
Both (CH3)2NH2⁺(aq) + OH- comes from the same equilibrium, that means:
[OH-] = [(CH3)2NH2⁺]
And: [(CH3)2NH] = 0.457M
[OH-] can be obtained from pH as follows:
14 -pH = pOH
14-12.2 = 1.8 =pOH
10^-pOH = [OH-] = 0.01585M
Replacing:
Kb = [0.01585M] [(0.01585M] / [0.457M]
Kb = 5.50x10⁻⁴
pKb = -logkb = 3.26
pH of the buffer:
Using H-H equation for bases:
pOH = pKb + log [conjugate acid] / [weak base]
pOH = 3.26 + log [0.280M] / [0.457M]
pOH = 3.05
pH = 14 - pOH
pH = 10.955.40X10^2kj converted into j
Answer:
540,000 (5.4X10^5)
Explanation:
kj means Kilojoules, while we are converting to joules.
- Kilo, or k, represents our base value, Joules, multiplied by 10^3. To convert to joules, we would simply multiply by 10^3 (which is 1000)
How many grams of chlorine are required in order to consume 100g of sodium chloride?
Answer:
92.1 g
Explanation:
Answer: 92.1 grams
I hope this helped :3
I
Gggggggggggggsgstststsysgtetwtwtst
Answer:
ummm u ok?
Explanation:
What is the equation for the reaction between ethanoic acid and butanol in the presence of H2SO4?
Answer:
[tex]CH_3COOH+CH_3CH_2CH_2CH_2OH\rightarrow CH_3COOCH_2CH_2CH_2CH_3+H_2O[/tex]
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to realize this is a question about esterification, process whereby a carboxylic acid and an alcohol react to produce water an an ester, we can set it up as shown below:
[tex]CH_3COOH+CH_3CH_2CH_2CH_2OH[/tex]
For the reaction between ethanoic acid and butanol; and therefore, the products side is:
[tex]CH_3COOCH_2CH_2CH_2CH_3+H_2O[/tex]
It means that the overall equation is:
[tex]CH_3COOH+CH_3CH_2CH_2CH_2OH\rightarrow CH_3COOCH_2CH_2CH_2CH_3+H_2O[/tex]
And the ester product is butyl ethanoate.
Regards!
The minimum combined kinetic energy reactant particles must possess in order for their collision to result in a reaction is called the
Answer: Activation energy
Explanation:
In a chemical reaction, the reactants contains particles which must collide in order for a reaction to occur. The rate of reaction depends on the frequency of effective collision between the reacting particles. Effective collision are those that result in reactions, which when they occur the colliding particles become activated with increased kinetic energy.
This energy must exceed a particular energy barrier for a particular reaction if the reaction must take place. This energy barrier that must be overcome before a reaction takes place is known as the ACTIVATION ENERGY.
To explain further, when two particles or molecules A and B come in contact with each other, for a reaction to take place, they must collide with a sufficient force to break the bond that exists between them. The minimum combined kinetic energy these reactant particles must possess in order for their collision to result in a reaction is called the activation energy.
A sample of propane, C3H8, contains 17.0 moles of carbon atoms. How many total moles of atoms does the sample contain
Answer:
The answer is "62.33 mol atoms".
Explanation:
In the propane molecule, it includes 8 atoms of Hydrogen for every 3 atoms of Carbon or 8 mol Hydrogen atoms for each of the 3 mol Carbon atoms.
[tex]\text{H atoms mole}= 17.0 \ \text{mols of C atoms} \times \frac{8 \text{mol H atoms}}{3 \text{mol H atoms}} =45.33\ \text{mol H atoms}[/tex]
Total atoms = 17.0 mols of C atoms +45.33 mols of H atoms
=62.33 mol atoms
What is the density (in g/L) of hydrogen gas at 21 °C and a pressure of 1670 psi?
Express your answer in grams per liter to three significant figures.
Answer:
[tex]d=9.5g/L[/tex]
Explanation:
Hello there!
In this case, according to the given information, it i possible for us to calculate the density of this gas via the ideal gas equation, according to the following setup:
[tex]PV=nRT\\\\P=\frac{mRT}{V*MM} \\\\\frac{m}{V}=d=\frac{P*MM}{RT}[/tex]
Thus, we plug in the variables (pressure in atm and temperature in K) to obtain:
[tex]d=\frac{113.6368atm*2.02g/mol}{0.08206\frac{atm*L}{mol*K}*(21+273)K} \\\\d=9.5g/L[/tex]
Regards!
can someone please help me im stuck
Answer:
The answers to your questions are given below.
Explanation:
1. __H₂ + __O₂ —> __H₂O
The above equation can be balance as follow:
H₂ + O₂ —> H₂O
There are 2 atoms of O on the left side and 1 atom on the right side. It can be balance by writing 2 before H₂O as shown below:
H₂ + O₂ —> 2H₂O
There are 2 atoms of H on the left side and a total of 4 atoms on the right side. It can be balance by writing 2 before H₂ as shown below:
2H₂ + O₂ —> 2H₂O
Now the equation is balanced.
Elements >>> Reactants >>> Products
H >>>>>>>>> 4 >>>>>>>>>>> 4
O >>>>>>>>> 2 >>>>>>>>>>> 2
2. __ P₄ + __O₂ —> __P₂O₃
The above equation can be balance as follow:
P₄ + O₂ —> P₂O₃
There are 4 atoms of P on the left side and 2 atoms on the right side. It can be balance by writing 2 before P₂O₃ as shown below:
P₄ + O₂ —> 2P₂O₃
There are 2 atoms of O on the left side and a total of 6 atoms on the right side. It can be balance by writing 3 before O₂ as shown below:
P₄ + 3O₂ —> 2P₂O₃
Now, the equation is balanced
Elements >>> Reactants >>> Products
P >>>>>>>>> 4 >>>>>>>>>>> 4
O >>>>>>>>> 6 >>>>>>>>>>> 6
what is the definition of isomerism
Answer:
Isomerism is the phenomenon in which more than one compounds have the same chemical formula but different chemical structures. Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers. Therefore, the compounds that exhibit isomerism are known as isomers.
The word “isomer” is derived from the Greek words “isos” and “meros”, which mean “equal parts”. This term was coined by the Swedish chemist Jacob Berzelius in the year 1830.
Explanation:
One liter of a gas is in a sealed chamber containing a moveable piston. If the piston is moved so that the volume of the gas is compressed to a volume of one-half liter, what will happen to the pressure on the gas? (Assume the temperature is constant and no gas particles are lost.)
Answer:
One liter of a gas is in a sealed chamber containing a moveable piston. ... It would be impossible to move the piston since gases are not compressible. The pressure will be twice the original value.
Explanation:
Give the Shorthand Electron Configuration for the following elements:
Nickel
Group of answer choices
[Kr] 3d8 4s2
[Ne] 3d6 4s2
[Ar] 3d8 4s2
answer of this question is [Ar]3d8 4s2
Answer: [Ar] 3d8 4s2
Explanation: Wikipedia
Quais são os nomes dos planetas anões
Answer:
Can you translate it on English so we can understand