Answer:
carbon nuclei...........
A voltaic cell differs from an electrolytic cell in that in a voltaic cell.
Answer:
they are opposite in function
Explanation:
voltaic cell converts chemical energy to electrical energy through redox reactions i.e reduction-oxidation reaction while the electrolytic cell converts chemical energy to electrical energy.
Which type of chemical reaction is represented by this equation
Answer:
2
Explanation:
2 balances out the equation
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
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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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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You have a solution of silver nitrate with an unknown concentration. To determine the concentration, you devise a method of adding an excess of calcium metal to 100.0 cm3 of solution and collecting the silver by filtration.
2AgNO3(aq)+Ca(s)→Ca(NO3)2(aq)+2Ag(s)
If 0.201 g of silver was collected, calculate the concentration of the silver nitrate solution in
mol dm−3.
Answer with the numerical value of the concentration to three significant figures, but do not include the units.
The concentration of the silver nitrate solution is 1.86 moles/dm³ .
What do you mean by concentration ?The concentration of a substance is the quantity of solute present in a given quantity of solution.
2AgNO₃(aq)+Ca(s)→Ca(NO₃)₂(aq)+2Ag(s)
0.201 g of Silver = 0.201/107.8 = 0.00186 moles
From the equation we can see that for 2 moles of Silver to form we need 2 moles of silver nitrate .
For 0.00186 moles we will need 0.00186 moles of Silver nitrate
The concentration of the solution can be determined as
Molarity = moles / L of solution = 0.00186 moles/l
or 0.00186 moles/cu.cm = 1.86 moles/dm³
Therefore the concentration of the silver nitrate solution is 1.86 moles/dm³ .
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The molar mass of hydrogen (H) is 1 g/mol, the molar mass of chlorine (Cl) is 35 g/mol, and the molar mass of zinc (Zn) is 65 g/mol. When 130 grams of zinc react completely in hydrochloric acid (HCl), how much is the total mass of the products
The total mass of the product will be 137 grams.
Stoichiometric calculationsFrom the equation of the reaction:
[tex]Zn + 2HCl --- > ZnCl_2 + H_2[/tex]
Mole of 130 grams of Zn = 130/65 = 2 moles
Equivalent mole of [tex]ZnCl_2[/tex] = 1 mole = 1 x135 = 135 grams
Equivalent mole of [tex]H_2[/tex] = 1 mole = 1 x 2 = 2 grams
Total mass of the products = 135 + 2 = 137 grams.
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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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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
What is the ph of a solution with [h3o ] = 2. 3 x 10-4 m
The pH of a solution with [H₃O⁺] = 2.3 × 10⁻⁴M is 3.64 means the solution is acidic in nature.
How do we define pH?pH of any solution is define as the negative logarithm of the concentration of hydronium ion as:
pH = -log[H⁺]
Given that concentration of H₃O⁺ or H⁺ = 2.3 × 10⁻⁴M
On putting values, we get
pH = -log(2.3 × 10⁻⁴)
pH = -(-3.64) = 3.64
Hence required pH value is 3.64.
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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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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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A gas has a volume of 29.3 L at 28.8 atm. What will its volume be if the pressure is changed to 16.5 atm?
Answer:
P₁V₁=P₂V₂
29.3 * 28.8 = 16.5* V₂
V₂ = 51.14 L
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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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!!!!!!!!
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
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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Sara wants to see if a new brand of hair dye lasts longer than the brand she currently uses. She puts the new hair dye on the left side of her head and the old brand on her right side. After 2 weeks she observes which side of her head has more gray hair showing through.
a. Independent Variable =
b. Dependent Variable =
c. Constant =
Answer:
a: the hair dye
b: the change in color of her hair
c: the same amount of hair for both dyes and the same amount of dye
Explanation:
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 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
If you have 20 grams of carbon-14 and it goes through 2 half lives, how much carbon-14 is left?
Answer:
it would be 25% sorry if I'm wrong
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 .
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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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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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
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.
is dissolving a physical energy
Answer:
Yes
Explanation:
Dissolving makes what is being dissolved and makes it mix with the water no longer holding its original shape. Dissolving may also change the color or texture of the liquid it is dissolved in. These are all physical changes.
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.
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:
29. Molecule H-F has a polar covalent bond because: (1 point)
a. lonisation energy of fluorine is greater than Hydrogen.
b. Hydrogen is a smaller Atom.
c. Electronegativity of Fluorine is greater than Hydrogen.
d. Fluorine has a greater tendency to pull the shared pair of electrons towards itself
Answer:
D
Explanation:
This question is a little strange. C and D are very similar, but I would pick D.
Fluorine actually has the highest electronegativity of all the elements. This allows it to pull more electrons towards itself. Since electrons have a negative charge, this causes the fluorine end of the molecule to be more negative while the hydrogen is left striped of electrons and has it positively charged necleus exposed. This means that one end of the molecule is positive while the other is negative, which makes this molecule polar. The only reason I would pick D over C is that D addresses the second part of the question about the covalent bond. A covalent bond is simply when two atoms share electrons.
Let me know if this was right and I hope it helps.