Answer:
A
Explanation:
Atomics number = number of protons
Lewis structure of Hydroxide ion and it's formal charge
Answer:
Hopefully this was helpful!
In this structure, Oxygen (O) is the central atom, and it is bonded to one Hydrogen (H) atom. Oxygen also has two lone pairs of electrons.
To calculate the formal charge, we need to determine the valence electrons of each atom and compare them to the number of electrons assigned to the atom in the Lewis structure.
For Oxygen (O):
Valence electrons = 6
Number of lone pairs = 2
Number of bonding electrons = 2 (from the bond with Hydrogen)
Formal charge = Valence electrons - Lone pairs - Number of bonding electrons
= 6 - 2 - 2
= 2 - 2
= 0
For Hydrogen (H):
Valence electrons = 1
Number of bonding electrons = 2 (from the bond with Oxygen)
Formal charge = Valence electrons - Number of bonding electrons
= 1 - 2
= -1
Therefore, the formal charge of Oxygen in the hydroxide ion (OH-) is 0, and the formal charge of Hydrogen is -1.
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Write the acidic equilibrium equation for HNO₂
Answer:
h+(aq)+no−2(aq)⇌hno2(aq)2. hno2(aq)⇌h+(aq)+no−2(aq)3. hno2(aq)⇌h−(aq)+no+2(aq)4. hno2(aq)+h+(aq)⇌h2no+2(aq)5. hno2(aq)+h−(aq)⇌h2no+2(aq)b.
Explanation:
The acidic equilibrium equation for nitrous acid is shown as HNO₂ ⇄ H⁺ + NO₂⁻ in which acid is in equilibrium with its dissociate ions.
What is equilibrium state?Equilibrium state in any chemical reaction is that state in which concentration of reactant and products will attain constant value.
Acidic equilibrium equation for Nitrous acid (HNO₂) is shown as:
HNO₂ ⇄ H⁺ + NO₂⁻
From the above equation it is clear that in equilibrium state concentration of nitrous acid is in equilibrium with the H⁺ ion and NO₂⁻ ion.
Hence, HNO₂ ⇄ H⁺ + NO₂⁻ is the acidic equilibrium equation.
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Circuit
1 The flow of electricity requires a
A open
B serial
C closed
D square
Answer:
the flow of electricity requires a closed circuit
Which product (if any) will form a precipitate in the following reaction?
3KOH(aq) + Fe(NO3)3(aq) --> Fe(OH)3 + 3KNO3
a)No Precipitate formed
b)KOH
c)KNO3
d)Fe(OH)3
Answer:
Your answer should be D. Fe(OH)3.
In an investigation, explain the best way to use variables in an experiment
Answer:
An experiment is an investigation in which a hypothesis is scientifically tested. In an experiment, an independent variable (the cause) is manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. An advantage is that experiments should be objective.
Explanation:
Calcium carbonate is reacting with hydrochloric acid and water to form the products calcium chloride hexahydrate and carbonic acid(which decomposes into water and carbon dioxide). Note: water is part of this reaction! if 10.76 g of calcium reacts with 10.51 g of hydrochloric acid, calculate how many grams of the hydrate will be formed
I need the written reaction, the limiting reactant work, and lastly, the stoichiometry work
Answer:
11.5 g
Explanation:
28.0 g
−
16.5 g
=
11.5 g
what would be the effect if electrons were loosely held
Answer:
I'm pretty sure They will exhibit high conductivity, ductility, and malleability because of their atomic structure.
Explanation:
I'm not 100 percent sure
Which statement is true according to the kinetic theory? A. Only gases show random motion of particles. B. Only gases and liquids show random motion of particles. C. Solids have a fixed shape, so they do not show random motion of particles. D. All states of matter show random motion of particles. Reset
Answer:
All states of matter show random motion of particles
Explanation:
In gases the particles are bonded very weakly so randomness is mostIn liquid it decreasesIn solid it's leastWhat is the concentration of Ni2+(aq) ion in a 0.035 M Ni(NO3)2 solution that is also 1.00 M NH3? (Kf for Ni(NH3)6 ^2+ = 5.5 × 108)
a) 3.5 × 10–2 M
b) 6.4 × 10–11 M
c) None of these is correct.
d) 2.6 × 10–10 M
e) 7.9 × 10–11 M
The concentration of X2+(aq) ion is mathematically given as
X^{2+}=3*10^{-10}M
What is the concentration of X2+ ion?Question Parameters:
the concentration of X2+(aq) ion in a 0.035 M (NO3)2 solution
Generally, the equation for the Chemical Reaction is mathematically given as
X2+ + 6xH3--><--- (X(xH_3)_6)^2+
Therefore
X^{2+}=(X (xH_3) _6)^{2+}) /(x ^{2+})+(xH_3^6)
[tex]X^{2+}=\frac{0.375}{5.5*10^8*0.79^6}[/tex]
X^{2+}=3*10^{-10}M
Hence, we have that the concentration of Ni2+(aq) ion is X^{2+}=3*10^{-10}M
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Why are the waters of the North Atlantic, like the waters near coral reefs, murky green? 1. The color is caused by chlorophyll in the water.
2. The color is caused by the waste products given off by fish.
3. The color is caused by coral reefs in the area.
4. The color is caused by the lack of oxygen in the water
The waters of the North Atlantic are murky green because the color is caused by coral reefs in the area. That is option 4.
The effects of overgrowth of algaeThe excess nitrogen and phosphorus which is found in fertilizers can cause an overgrowth of algae in a short period of titme, when washed into water bodies. This is called algae blooms.
The effects of overgrowth of algae on aquatic bodies include the following:
reduce the ability of fish and other aquatic life to find food It causes thick, green muck that impacts clear water, recreation, businesses and property values.Therefore, the murky green color is caused by coral reefs in the area.
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Answer:
The waters of the North Atlantic are murky green because the color is caused by coral reefs in the area. That is option 4.
The effects of overgrowth of algae
The excess nitrogen and phosphorus which is found in fertilizers can cause an overgrowth of algae in a short period of titme, when washed into water bodies. This is called algae blooms.
The effects of overgrowth of algae on aquatic bodies include the following:
reduce the ability of fish and other aquatic life to find food
It causes thick, green muck that impacts clear water, recreation, businesses and property values.
Therefore, the murky green color is caused by coral reefs in the area.
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Explanation:
what materials you would set out in a four-surface amalgam procedure?
Answer:
in the image below
Explanation:
The collective name for the abiotic factors which include light, temperature, water, atmospheric gases and wind.
If you answer this please include the steps because I used to know how to do these problems really well I just forgot how.
Hydrogen sulfide gas, which smells like rotten eggs, burns in air to produce sulfur
dioxide and water. How many moles of oxygen gas would be needed to completely
burn 8 moles of hydrogen sulfide?
Answer:
12 moles of oxygen gas
Explanation:
2H₂S + 3O₂ => 2SO₂ + 2H₂O [balanced equation]For every 2 moles of hydrogen sulfide gas, 3 moles of oxygen is requiredTherefore, 8 moles of hydrogen sulfide requires 12 moles of oxygen gas12 moles of oxygen gas would be needed to completely burn 8 moles of hydrogen sulfide.
What is mole ratio of a reaction?The mole ratio of a reaction is a ratio showing the how moles of reactants combine to form products or the ratio of moles if products formed to the moles of reactants used up.
The balanced equation of the reaction is given below:
[tex]2H_{2}S + 3O_{2}\rightarrow 2H_{2}O + SO_{2}[/tex]
3 moles of oxygen reacts completely with 2 moles of hydrogen sulphide.
8 moles of hydrogen sulphide will require 3 × 8/2 moles of oxygen = 12 moles of oxygen.
Therefore, 12 moles of moles of oxygen gas would be needed to completely burn 8 moles of hydrogen sulfide.
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The inside of a basketball has a pressure of 0.476 atm at 25.0°C. What is the pressure inside of the ball if the temperature is decreased to 20.0°C?
Use the formula:
P1
T1
=
P2
T2
Answer:
1) 0.468 atm
Slide 4: 9.2 atm Slide 5: D B E
Slide 6:
Gas A 1.31,
Gas B 0.444
Explanation:
edge 2022
The inside of a basketball has a pressure of 0.476 atm at 25.0°C. The pressure inside the ball if the temperature is decreased to 20.0°C is 0.484 atm.
What do you mean by the pressure ?The term pressure is defined as the amount of force applied perpendicular to the surface of an object per unit area. The symbol for it is "p" or P.
There are two basic types of pressure are absolute and gauge - distinguished by what pressure they are compared to, which is called the reference pressure.
Given:
P1 = 0.476 atm
T1 = 25.0°C = 298K
P2 = ?
T2 = 20.0°C = 293 K
P1T1 = P2T2
By putting these values in above equation and we get,
P2 = P1T1/ T2
= 0.476 ×298 / 293
= 0.484 atm
Thus, the pressure inside the ball if the temperature is decreased to 20.0°C is 0.484 atm.
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I need help with Chemistry: Mole Conversion
It must be answered in complete detail
Answer :
As Per Given Information
Given volume of O₂ is 53 L
We've been asked to find the number of moles of O₂ gas contained
For finding the number of moles the following formulae is use
[tex]\\ \bullet{\boxed{\blue{\bf{Number \: of \: moles = \frac{Given \: volume}{22.4} }}}}[/tex]
Put the given value we obtain
[tex] \sf \dashrightarrow \: number \: of \: moles \: = \frac{53}{22.4} \\ \\ \sf \dashrightarrow \: number \: of \: moles \: = 2.366 [/tex]
So, the number of moles is 2.366 .
AT STP 1mol of any gas weighs 22.4L
Volume of oxygen=53L
No of moles
53/22.42.37molwhich chemical equations show an oxidation- reduction reaction
Answer:
O2 + 2H2 → 2H2O MgSO4 + CaCl2 → MgCl2 + CaSO4 2Al + 6HI → 2AlI3 + 3H2 FeCl2 + Na2CO3 → FeCO3 + 2NaCl 2AgNO3 + Na2S → Ag2S + 2NaNO3
Scientists often use controlled experiments to answer questions. Choose the three correct statements about controlled experiments. (PLEASE INCLUDE THREE ANSWERS)
A) No changes are made to a test group in an experiment.
B) A control group is used for comparison to other groups. Eliminate
C) Only one change can be made per test group in an experiment.
D) Changes can only be made to the control group in an experiment.
E) A controlled experiment must have a control group and test group(s).
If anyone could help with this that would be amazing!
Answer:
Ima go with E I'm still taking the test...
Explanation:
if not E its B but E is the only one that makes sense...
Answer:
Actually it was that is worked but only for 10 days
Explanation:
I took the science unit test
State collision theory
Collision theory states that when suitable particles of the reactant hit each other with correct orientation, only a certain amount of collisions result in a perceptible or notable change; these successful changes are called successful collisions.
Explanation:here your answer matehave a great day
The following statements are about elements in the Periodic Table.
1 Their atoms have a full outer shell of electrons.
2 They are unstable .
3 They are found in Group
4 They are present in small quantities in the air.
Which statements are correct for the noble gases? *
A) 1, 2 and 3
B) 1, 2 and 4
C) 1,3 and 4
D) 2, 3 and 4
Answer:
D) 2,3 and 4
Option A is not correct because not all elements in the periodic table have a full outer shell of electrons
Give an example of two different compounds that have a hydrogen bonding interaction when mixed together.
why do silver mecury cupper gold not react with water
Since gold and silver are the least reactive metals, they do not react with water. The surface of metallic lead is covered by a thin layer of lead oxide,. As a result, it does not react with water in normal circumstances.
Explanation:
Hope it helps you!!Answer:
why do silver mecury cupper gold not react with water
Explanation:
why do silver mecury cupper gold not react with water
How many grams are in 6.04 x 10 22 particles of AICI3
Answer:
333.415 grams
Explanation:
If you multiply and do a few calculations, this is the answer :)
333.415 grams
Your general equation is Al + 3Cl -> AlCl3
A mole of Aluminum weighs 26.98 grams.
26.98 x 2.5 = 67.45 (so that is the weight of the aluminum in your AlCl3 compound.
Now lets add the weight of the Cl.
the molar mass of chlorine is 35.45 grams/mole.
If 10 grams of Na react with 15 grams of sodium to form sodium chloride, at the end of the chemical reaction, 2 grams of Na are left.
What is the limiting reactant? Explain your answer.
Answer:
the limiting reactant is the reactant that gets used up first, so the limiting reactant is Cl2
A gas has a density of 1.57g/L at 40.0C and 2.00atm of pressure. What is the identity of the gas?
Answer:
Neon
Explanation:
K=C degrees+273.15 = 40.0+273.15=313.2 K
M=1.57g/L×0.08206 atm L/mol K×313.2 K/2.00 atm
M=20.17 g/mol
K= Kelvin
M= Molar Mass
HELP PLSSS
Why is the water cycle important for ecosystems?
A. The water cycle helps plants keep and store water. The cycle makes sure that water stays at earth's surface and is available to ecosystems.
B. The water cycle photosynthesis to make clouds. These clouds make surface water that animals drink to survive in there ecosystem.
C. The water cycle permanently removes water from the underground and from large bodies of water and transports it to terrestrial ecosystems
D. The water cycle helps recycle and transport water around the planet. The cycle replenishes the water supply of ecosystems.
Answer:
The water cycle is often taught as a simple circular cycle of evaporation, condensation, and precipitation. Although this can be a useful ...
Explanation:
Answer: Your answer will be D)
Explanation: Hope this helped
what is kinetic energy of a 155 kg object moving at speed of 20 m/s
Answer:
KE = 1/2*m*v^2
KE = 1/2*150kg*(20 m/s)^2
KE = 75kg * 400m²/s²
KE = 30,000 kg*m²/s²
KE = 30,000 N*m
KE = 30,000 J
Explanation:
Hope this helped.
A brainliest is always appreciated.
The activation energy for the reaction
1
H2(g) + 12(g) → 2 HI(9)
is 169 kJ/mol, and AE for the reaction is +27 kJ/mol. What is the activation energy for the decomposition of HI?
7
ER
kJ/mol
7
The western coast of the United States has been increasing in size for millions of years.
Which process has added material to the western coast of the United States?
Answer:
accretion at convergent boundaries
Explanation:
In the reaction between copper and silver nitrate, 95.3 g of silver and 82.9g of copper nitrate are produced. How much of each reactant was used?
Reaction
2AgNO₃ + Cu ⇒ Cu(NO₃)₂ + 2Ag
mol silver (Ag): 95.3 : 108 g/mol = 0.882
mol copper nitrate (Cu(NO₃)₂): 82.9 : 187.5 g/mol = 0.441
mol Ag = 2 x mol Cu(NO₃)₂, so 0.441 being the mole basis of the reactants
mol Cu = 0.441
mass Cu = 0.441 x 63.5 g/mol = 28 g
mol AgNO₃ = 0.882
mass AgNO₃ = 0.882 x 170 g/mol = 149.94 g
Which product (if any) will form a precipitate in the following reaction?
3CaCl2(aq) + 2Na3PO4(aq) --> Ca3(PO4)2 + 6NaCl
a)Ca3(PO4)2
b)NaCl
c)No Precipitate Formed
d)Na3PO4
Answer:
I'm pretty sure the answer is A. Ca3(PO4)2.