Answer: 800 mL of methyl alcohol should be added to 200 ml of water to make this solution.
Explanation:
Volume of the methyl alcohol = x
Volume of water = y = 200 mL
Volume of the solution ,V = x + y
Volume percentage of solution = 80%
x = 800 mL
800 mL of methyl alcohol should be added to 200 ml of water to make this solution.
Fill in the left side of this equilibrium constant equation for the reaction of ammonia , a weak base, with water
The equilibrium constant equation for the reaction of ammonia , a weak base, with water is K=[NH₄⁺][OH⁻] / [NH₃].
What is equilibrium constant?Equilibrium constant is a number that expresses the connection between the quantity of products and reactants present at equilibrium in a reversible chemical reaction.
Given chemical reaction is:
NH₃(aq) + H₂O(l) ⇄ NH₄⁺(aq) + OH⁻(aq)
Equilibrium constant equation for the above reaction will be represent as:
K = [NH₄⁺][OH⁻] / [NH₃]
As value of pure water is 1 for the above equation.
Hence equilibrium constant equation for the reaction of ammonia is K=[NH₄⁺][OH⁻] / [NH₃].
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ASAP!!!!!!!!!!
difference between a commercial and natural indicator
Answer:
When a substance is added into a solution then its color will change with different kind of solution then such type of substance can be considered as indicator. . They can be synthetic as well as an olfactory indicator
Explanation:
Hope this helps!!!!!!!!
Be safe!!!!!!!!
Lightning is caused by
a. water droplets losing electrons when they collide in a cloud
b. the high temperatures in the atmosphere during summer
c. charged particles colliding with earth’s magnetic field
d. a shockwave caused by thunder
Answer:
C
Explanation:
These particles are attracted to the ground with opposite charges that they form lightning (That's the best way I could explain it )
Answer:
c. charged particles colliding with earth’s magnetic field
Explanation:
Lightning is caused by
charged particles colliding with earth’s magnetic field
its not ,b or a, nor ,c &,d
Lightning is an electrical discharge caused by imbalances between storm clouds and the ground, or within the clouds themselves. Most lightning occurs within the clouds. What causes lightning?
So, do thunderclouds have rubber shoes? Not exactly, but there is a lot of shuffling going on inside the cloud and there's alot on the lighting that tower .
A sample of carbon dioxide gas occupies a volume of 2.50 l at 140 kpa. what pressure would the gas exert if the volume was decreased to 1.25 l?
Answer:
280 kPa
Explanation:
P1V1 = P2V2
140 * 2.5 = P2 * 1.25
P2 = 280 kPa
calculate the molarity when 28.91 grams of nacl is dissolved in 352 ml of water
Answer:
divide the number of moles of NaCl by the volume of the solution. In this case that is 0.32 moles, NaCl split by 3.4 L gives 0.094 M NaCl.
Can someone help me with this problem.
Answer:
c. a small amount
Explanation:
Trace elements (or trace metals) are minerals present in living tissues in small amounts.
To completely convert 9. 0 moles of hydrogen gas (h2) to ammonia gas, how many moles of nitrogen gas (n2) are required?
To completely convert 9. 0 moles of hydrogen gas (h2) to ammonia gas, 3.0 moles of nitrogen gas (n2) are required.
What are moles?The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
The given reaction is [tex]\rm N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)[/tex]
By the stoichiometry rule of ratio hydrogen: nitrogen
3 : 1
The reacted moles of nitrogen is equals to H/3 moles of reacted hydrogen
So, moles of nitrogen
[tex]\rm Moles\; of\; nitrogen = \dfrac{9.0 }{3} =3.0\;mol[/tex]
Thus, 3.0 moles of nitrogen gas (n2) are required.
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If the [oh-] of a solution is 2.7 x 10-4 mol/l the poh of the solution is
a
-4.43
b
1.00
c
10.44
d
3.56
Answer:
The correct answer is 547
Identify the generic outer electron configuration for the noble gases
The generic outer electron configuration for the noble gases is ns₂ np₆. All noble gases have fully completely shell.
What are noble gases?Noble gases are all monatomic gases, which all are odorless and colorless with very less reactivity.
All noble gases have completely filled s and p orbitals.
Generally, S orbital contain 5 electrons and p orbital contain 6 electrons
Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn) are all noble gases.
Thus, the generic outer electron configuration for the noble gases is ns₂ np₆.
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9 Ethanedioic acid, HO₂CCO₂H, can be oxidised by KMnO4 in dilute sulfuric acid. The products of this reaction are carbon dioxide, water, potassium sulfate and manganese(II) sulfate. In this reaction each ethanedioic acid molecule loses two electrons as it is oxidised. A half-equation for this process is shown. HO₂CCO₂H →→ 2CO₂ + 2H+ + 2e™ How many water molecules are produced when five ethanedioic acid molecules are oxidised by KMnO4 in dilute sulfuric acid? A 5 B 8 C 10 D 16
The oxidation reaction is the chemical reaction in which the species loses electrons. The five oxidized ethanedioic acid molecules will produce 8 water molecules. Thus, option B is correct.
What is the half-reaction equation?Half reaction equations are the representation of the reduction and the oxidation half of the whole reaction that denotes the gaining and losing of electrons differently.
The oxidation half of the reaction is given as:
HO₂CCO₂H → 2CO₂ + 2H⁺ + 2e⁻
The reduction half of the reaction will be given as:
MnO₄ + H⁺ → Mn²⁺ + H₂O
The overall reaction is written as:
C₂O₄ ⁻² + MnO₄⁻ + H⁺ → CO₂ + H₂O + Mn²⁺
Here electrons are lost in the formation of carbon dioxide and electrons are gained when manganese is produced.
The total reaction is given as:
5 C₂O₄ ²⁻ + 2MnO₄ ⁻ + 16H⁺ → 10CO₂ + 8 H₂O + 2 Mn²⁺
Therefore, option B. five ethanedioic acid molecules produce 8 water molecules.
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Describe what causes two atoms to bond together to forms a molecule . Your description should include force , potential energy and electrons
Due to its position, an object has the ability to store energy. For instance, when a demolition machine's heavy ball is held in an elevated position, it is storing energy.
What is Potential energy?Potential energy is the name for this positional energy that has been stored. Similar to how a drawn bow can store energy due to its posture. There is no energy in the bow while it is in its normal position, or when not drawn.
The bow can yet store energy when its position is changed from its normal equilibrium position because of its position.
Potential energy is the name for this positional energy that has been stored. Potential energy is the energy of position that a thing has stored inside it.
Therefore, Due to its position, an object has the ability to store energy. For instance, when a demolition machine's heavy ball is held in an elevated position, it is storing energy.
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How does breaking up a sugar cube that sits on the bottom of the glass affect its ability to dissolve in your iced tea?
Answer:
yeah.. u cant only if heated the iced tea, breaking the sugar cube up has no effect on the dissolving process.
Explain the impact that changing concentrations has on a system in a state of dynamic equilibrium. What will happen when reactants are added to a reversible reaction mixture at equilibrium?
if pressure is increased, equilibrium will shift toward the side that has the last amount of moles in order to alleviate the sudden change and bring the pressure back down.
What is an alkene?
A. A hydrocarbon containing all single bonds
B. A hydrocarbon containing a carbon-carbon triple bond
C. A hydrocarbon containing a carbon-carbon double bond
O D. A hydrocarbon containing an aromatic ring
The answer is B. It’s b.
Answer:
A hydrocarbon containing a carbon - carbon double bond.
Explanation:
Alkene is hydrocarbon containing a
carbon - carbon double bond.
( Refer the attachment to understand more clearly )
An alkene is a hydrocarbon containing a carbon-carbon double bond and the correct option is option C.
What is a Hydrocarbon?Hydrocarbons are organic compounds that are entirely made up of only two kinds of atoms – carbon and hydrogen.
The carbon atoms join together to form the framework of the compound, and the hydrogen atoms attach to them in many different configurations.
Aliphatic hydrocarbons are divided into three main groups according to the types of bonds they contain: alkanes, alkenes, and alkynes.
Alkanes have only single bonds, alkenes contain a carbon-carbon double bond, and alkynes contain a carbon-carbon triple bond.
Therefore, An alkene is a hydrocarbon containing a carbon-carbon double bond and the correct option is option C.
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Why is knowing density important to us? Give a reasonable answer please don’t copy what the internet has I already tried doing that I can’t
Answer:
without density, we wont be able to determine what substance will float
Mg(s) + 2 HCl (aq) _MGCL2 (Aq) + H2 (g) the total pressure of gas collected over water is 740.0 mmhg and the temperature is 21.5 ‘c what is the pressures of hydrogen gas formed in mmhg?
The pressure of hydrogen gas formed is 720.8 mmHg.
What is Partial Pressure ?The pressure exerted by a (specified) component in a mixture of gases.
We have to understand one thing that the Hydrogen, which is collected over water, will be mixed with water vapor.
This means that the total pressure of the mixture will have two components.
the partial pressure of Hydrogenthe vapor pressure of water at 21.5 CThe vapor pressure of water at that temperature is approximately
19.231 mmHg.
This means that
[tex]\rm P_{total} = P_{hydrogen} + \; P_{water vapor}[/tex]
740 = [tex]\rm P_{hydrogen}[/tex] + 19.231
[tex]\rm P_{hydrogen}[/tex] = 740-19.231
[tex]\rm P_{hydrogen}[/tex] = 720.8 mmHg
Therefore the pressure of hydrogen gas formed is 720.8 mmHg.
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2 C4H10 + 13 O2--> 8 CO2 + 10 H2O
How many molecules of CO2 are produced from the combustion of 100 grams of butane (C4H10)?
Answer:
4.14 x 10²⁴ molecules CO₂
Explanation:
2 C₄H₁₀ + 13 O₂ --> 8 CO₂ + 10 H₂O
To find the number of CO₂ molecules, you need to start with 100 grams of butane (C₄H₁₀), convert to moles (using the molar mass), convert to moles of CO₂ (using coefficients from equation), then convert to molecules (using Avagadro's number). The molar mass of C₄H₁₀ is calculated using the quantity of each element (subscript) multiplied by the number on the periodic table. The ratios should be arranged in a way that allows for units to be cancelled.
4(12.011g/mol) + 10(1.008 g/mol) = 58.124 g/mol C₄H₁₀
100 grams C₄H₁₀ 1 mol C₄H₁₀ 8 mol CO₂
-------------------------- x ---------------------- x ---------------------
58.124 g 2 mol C₄H₁₀
6.022 x 10²³ molecules
x ------------------------------------ = 4.14 x 10²⁴ molecules CO₂
1 mol CO₂
What happens after the digestive system breaks down food?
If the digestive system breaks down you would have no ability to get the nutrients.
What is the digestive system?The digestive system includes the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus.
If you had no digestive system, you would have no ability to get the nutrients and sugars in food, and you would die.
The digestive system is very long, however. Some people have gotten into car accidents and damaged their intestines, and had to have part of them removed.
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How many kg of water are needed to prepare a 0.2 m NaOH with 6 mol?
Answer:
2.05 i think sorry if im wrong
Explanation:
How many moles are equal to 8.44 x 1023 atoms of sulfur?
Round your answer to three decimal places.
Hurry please.
Answer:moles or atom. The SI base unit for amount of substance is the mole. 1 mole is equal to 6.0221415E+23 atom. Note that rounding errors may occur, so always check the results.
Explanation:
What is the molarity of a solution containing 56 grams of LiF in 959 mL of solution?
O 1.5 M
O 4.4 M
O 0.0022 M
O 22 M
Answer:
2.25 M <========= I do not see this in your selection of answers !
Explanation:
Mole weight of Li F
( from periodic table ) = 6.94 + 18.998 = 25.938 gm/mole
56 gm / ( 25.938 gm /mole) = 2.15899 moles
2.15899 mole / (.959) L = 2.25 M
Lab: Half-Life Claim, Evidence, Reasoning: Lab Prompt Write 3 total sentences establishing your claim, giving your evidence from the lab, and giving your reasoning. Using the data collected from your lab, and the objective questions, create a CLAIM: based on evidence collected in the lab EVIDENCE: Pulled directly from the lab REASONING: Based on principles, rules, universal laws, definitions.
The question is not found here but the results of a lab experiment can be used to draw discussions and conclusions.
What is an experimental procedure?An experimental procedure in the lab refers to the process to validate (or reject) our working hypothesis from a given question of the natural world.
Within the laboratory, we need to collect data through experimental procedures that help us as evidence to answer the hypothesis.
In conclusion, the question is not found but the results of a lab experiment can be used to draw discussions and conclusions.
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a. which letter represents the products in the chemical reaction?
b. which letter represents the reactant’s in the chemical reaction?
c. what was added to letter D
d. Does the graph represent an endothermic or exothermic reaction? Explain how
you know. (2 points)
What is the molality of the solute in a 25. 5 percent by mass aqueous solution of formic acid (hcooh)?
Molality is the ratio of the moles of the solute and the mass of the solvent. The molality of the solute is 7.38 m.
What is molality?Molality is the moles of the solute present in a kilogram of the solvent in a solution of the substance.
Given,
Percent by mass = 25.5 %
In 100 gm of solution = 25.5 gm of formic acid
Mass of solution = 100 gm
Mass of solute = 25.5 gm
Mass of solvent = 74.5 gm
Moles of solute are calculated as:
[tex]\dfrac{25.5}{46} = 0.55 \;\rm moles[/tex]
Moles of solvent are calculated as:
[tex]\dfrac{74.5}{18} = 4.13\;\rm moles[/tex]
Molality is calculated as:
[tex]\begin{aligned} \rm Molality &= \rm \dfrac{moles}{\text{mass in kg}}\\\\&= \dfrac{0.55}{0.0745}\\\\&= 7.38 \;\rm m\end{aligned}[/tex]
Therefore, 7.38 m is the molality of the solute.
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Name these compounds according to IUPAC. (ASAPP)
Answer:
but-1-ene
Explanation:
Solving :
⇒ 4 carbon atoms (but-)
⇒ One double bond (-ene)
⇒ Bond is present on the 1st carbon atom
Hence, the IUPAC name is :
but-1-ene
More than one-third of all accidental fires in food-service operations are caused by
Fire is a risk in all commercial kitchens. Open flames, grease, poor house-keeping practices, electrical hazards and flammable materials are common causes of restaurant fires.
What is an accidental fire?
Accidental fires are those in which the proven cause does not involve any deliberate human act to ignite or spread the fire.
Open flames, grease, poor house-keeping practices, electrical hazards and flammable materials are common causes of restaurant fires. Employers must implement effective administrative controls to protect employees and the business from the dangers of fire.
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how can a change to another population could affect births and deaths in the parrot population.
Answer:
read it first
Explanation:
Population change is governed by the balance between birth rates and death rates. If the birth rate stays the same and the death rate decreases, then population numbers will grow. If the birth rate increases and the death rate stays the same, then population will also grow.
hope it helps
Balance this reaction.
__CO +__ H₂ —> __CH3OH
options for blanks: (blank,2,3,4)
Answer:
1CO + 2H₂ —> 1CH3OH
Explanation:
When balancing any chemical equation given, you identify the amount of reactants and amount of products.
From our given equation;
__CO +__ H₂ —> __CH3OH
Reactants
C = 1
O = 1
H = 2
Products
C = 1
O = 1
H = 3 + 1 = 4
This shows that Hydrogen is not balanced we require 2 to balance it. Thus giving us;
1CO + 2H₂ —> 1CH3OH,
Which is balanced.
Select the correct answer.
in a grassland, the number of antelopes increased from 200 to 400. Antelopes are grass-eating animals. How will this change directly affect the
ecosystem?
O A. There will be fewer producers in the area.
• B. There will be an increase of other grass-eating animals.
O C. There will be no decomposers in the area.
O D. There will be fewer predators in the area.
Answer: A. There will be fewer producers in that area.
Explanation: Answer A is correct because all plants, including grass, is a producer. Since there is an increase in grass eating animals (Antelope), more grass will be consumed, decreasing the amount of grass aka producer.
A rigid cylinder with a movable piston contains 50.0 liters of a gas at 30.0° C with a pressure of 1.00 atmosphere. What is the volume of the gas in the cylinder at STP?
**I NEED ANSWERS STEP BY STEP PLEASE**
The volume of a gas at STP is 45.6L in the given conditions.
How to calculate the volume of the gas at given conditions?This is an example of a combined gas law equation.
P₁V₁/T₁=P₂V₂/T₂
V₂=V₁×P₁/P₂×T₂/T₁
Convert STP in bar
P₁=1atm=1.013 bar, V₁=50L, T₁=303K, P₂=1bar, V₂=?, T₂=273K
V₂=50×1.013/1×273/303
V2=45.6L
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