Answer:
4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (l)
This is an oxidation-reduction (redox) reaction:
4 N-III - 20 e- → 4 NII
(oxidation)
10 O0 + 20 e- → 10 O-II
(reduction)
NH3 is a reducing agent, O2 is an oxidizing agent.
Explanation:
good luck
How fossils are made
What is true of a solution of 2.0 M NaCl(aq)? (3 points)
Question 1 options:
1)
It contains 2.0 grams of NaCl per 100 grams of water.
2)
It contains 2.0 grams of NaCl per 1 liter of solution.
3)
It contains 2.0 moles of NaCl per 100 grams of water.
4)
It contains 2.0 moles of NaCl per 1 liter of solution.
Answer:
4.) It contains 2.0 moles of NaCl per 1 liter of solution
Explanation:
I took the test
It is true of a 2.0M NaCl solution that it contains 2.0 moles of NaCl per 1 liter of solution.
What is molarity?The molarity of a solution refers to the no of moles of a solute in terms of the volume of the solution.
This means that the molarity of a solution can be calculated by dividing the number of moles of the solute by the volume of a solution.
Therefore, it is true of a 2.0M NaCl solution that it contains 2.0 moles of NaCl per 1 liter of solution.
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which of the following is not a property of waves?
A. amplitude
B. frequency
C. period
D weight
Answer: D. Weight
Explanation:
A wave is simply referred to as a disturbance which travels through a particular medium from one particular location to another location.
The properties of wavelength include:
• amplitude
• wavelength
• frequency
• period
• velocity
It should be noted that weight isn't a property of wave. Therefore, the correct option is D.
Answer:
D. Weight
Explanation:
I took the test
Calculate the decrease in temperature when 7.00 L at 21.5 °C is compressed to 4.00 L. The pressure remains constant at 101.3 kPa.
Explanation:
[tex] \frac{P _{1} V _{1} }{T _{2}} = \frac{P _{2} V _{2}}{T _{1}} \\ \frac{(101300 \times 7)}{(21.5 + 273)} = \frac{(101300 \times 4)}{T _{2}} \\ T _{2} = \frac{(405200 \times 294.5)}{(709100)} \\ T _{2} = 168.3 \: kelvin \\ decrease \: in \: temperature = (294.5 - 168.3) \\ = 126.2 \: kelvin[/tex]
2
Phosphorus trioxide (P302) and
phosphorus pontoxide (P20s) are
examples where phosphorus atoms
may bond in different ratios with
oxygen and thus have different
valencies. Give the valency of
phosphorus in P20, and P2Os. As
usual, take the valency of oxygen
as -2
Answer:
Check the answer from QUIZLET!
Taking medicine can cause driving problems
such as
intense or unexpected reactions
heightened mental and physical abilities
shortened reaction time
All of the above.
PLEASE I NEED TO ANSWER THIS
Answer:
shorten reaction time
...........
what is the cation called?
Answer:
Explanation:
HYDRONIUM
Answer:
hydronium
Explanation:
:0
what has changed in the atmosphere that give the rock strata the appearance of rust?(red/orange color).
Answer:
Explained below.
Explanation:
What has changed in the atmosphere is that oxidation has occurred where an oxidizing chemical specie has reacted with an oxygen containing compound.
Now these chemicals when they react with rain and fall on rocks react with the rocks to weaken them in a process known as chemical weathering.
Now when this weathering from the oxidizing chemicals from the rain react with rocks that contain iron, it leads to the rock having an appearance of rust.
Please help no links
Ms. Daly had Hydrogen gas that was cooled from 100 °C to 50.5°C. The new volume was 20 L. What was its original volume?
20.
50.
Answer:
23 L
Explanation:
We'll begin by converting celsius temperature to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T₁) = 100 °C
Initial temperature (T₁) = 100 °C + 273
Initial temperature (T₁) = 373 K
Final temperature (T₂) = 50.5 °C
Final temperature (T₂) = 50.5 °C + 273
Final temperature (T₂) = 323.5 K
Finally, we shall determine the initial volume of gas. This can be obtained as follow:
Initial temperature (T₁) = 373 K
Final temperature (T₂) = 323.5 K
Final volume (V₂) = 20 L
Initial volume (V₁) =?
V₁/T₁ = V₂/T₂
V₁ / 373 = 20 / 323.5
Cross multiply
V₁ × 323.5 = 373 × 20
V₁ × 323.5 = 7460
Divide both side by 323.5
V₁ = 7460 / 323.5
V₁ = 23 L
Thus, the original volume of the gas is 23 L
Two beakers each contain 200 mL of water. Into one beaker, a student adds 5.0 g NaI. Into the other, she adds 5.0 g of KI. What is the expected effect on the boiling points of the solutions?A) the NaI solution will have a higher boiling point than the KI solutionB) the KI solution will have a higher boiling point than the NaI solutionC) the boiling points of both solutions will be elevated to the same temperature, above 100 degrees CelsiusD) the boiling points of both solutions will remain at 100 degrees Celsius
Answer:
A) the NaI solution will have a higher boiling point than the KI solution
Explanation:
We must have it behind our minds that the addition of a solute to water elevates the boiling point of water.
Boiling point elevation is a colligative property. It depends on the amount of solute present.
We know that;
ΔTb = Kb m i
Where;
ΔTb = boiling point elevation
Kb = boiling point constant
m = molality
i = Van't Hoff factor
Since KI and NaI has the same number of particles(two particles each), the boiling point elevation (ΔTb) depends on the molality of each solution. The molality also depends on the molar mass of each substance. The molality of NaI is greater than the molality of KI hence the boiling point NaI is greater than the boiling point of KI.
So;
200mL of water = 200g of water
Mass of solvent = 200g/1000 = 0.2 Kg
Molality of NaI = 5g/150 g/mol * 1/0.2 = 0.167 m
molality of KI = 5g/166 * 1/0.2 = 0.151 m
Kb for water = 0.512 oC m-1
Boiling point of water = 100 oC
Let the boiling point of NaI be A
A - 100 = 0.512 * 0.167 * 2
A = (0.512 * 0.167 * 2) + 100
A = 100.171 oC
Let the boiling point of KI be B
B - 100 = 0.512 * 0.151 * 2
B = (0.512 * 0.151 * 2) + 100
B = 100.154 oC
Hence;
Boiling point of NaI > Boiling point of KI
what is the pH of the 1.0 M KOH solution?
Answer:
So... pH of the 1.0" 10-2 mol-1 KOH is.. = 12So3+H2o→H2 So4
identify the nature of this reaction
helpp please i'm such a failure
THE REACTION IS COMBINATION REACTION!
16) What is the acceleration of an object with a mass of 31.5 kg when an unbalanced force
of 223 N is applied to it?
Answer:
a= 7.07 m/s^2
Explanation:
Newton's second law of motion states that the acceleration of an object is produced by the net force.
the formula to calculate the force: F=ma
you just rearrange it to solve for a
a= F/m a=223/31.5
=7.07
If 20. milliliters of 1.0 M HCl was used to completely neutralize 40. milliliters of an NaOH solution, what was the molarity of the NaOH solution?
A) 0.50 M B) 2.0 M C) 1.5 M D) 4.0 M
Answer:
a)0.50
Explanation:
took one for the team :
What is the difference between light photons and infrared photons?
Answer:
Light Photons: Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. The energy of a photon depends on its wavelength: longer wavelength photons have less energy and shorter wavelength photons have more.
Infrared photons: Infrared waves, or infrared light, are part of the electromagnetic spectrum. People encounter Infrared waves every day; the human eye cannot see it, but humans can detect it as heat. A remote control uses light waves just beyond the visible spectrum of light—infrared light waves—to change channels on your TV.
On the electromagnetic spectrum, visible light has a wavelength that falls between 380 nm and 750 nm, whereas infrared light, which marks the beginning of the non-visible spectrum, has a wavelength that falls between 700 nm and 1 mm. Because of this, infrared can only be viewed with specialized tools like security cameras.
What is infrared light ?A type of radiant energy that we experience as heat, but that is invisible to human eyes is infrared radiation (IR), often known as infrared light. The sun and fire are two of the most prominent sources of IR radiation, however all objects in the cosmos release some of it.
The energy of the photons determines the various types of radiation, starting with radio waves with low energies. In comparison to visible, ultraviolet, X-ray, and gamma ray photons, which are the most energetic of all, microwave photons have somewhat higher energy. Infrared photons have even more energy.
Cooler objects produce lower energy, longer wavelength photons, while hotter ones release higher energy, shorter wavelength photons.
Thus, On the electromagnetic spectrum, visible light has a wavelength that falls between 380 nm and 750 nm, whereas infrared light.
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What happens to a catalyst used in a reaction?
O A. It is unchanged by the reaction.
OB. It is bonded to the products.
O c. It is broken up by the reactants.
O D. It is used up in the reaction.
help asap very appreciated
A catalyst used in a reaction remains unchanged
When patterns of stars appear to move across the sky, it provides evidence that ________.
A. Earth and stars move together
B. Earth rotates in space
C. patterns of stars can change
D. stars actually move
Answer:
Answered B
Explanation:
The earth moves which makes the stars and everything in space seem like its moving
A few Critical Thinking questions/creativity on the topic 'Particles of matter are very small'
Answer:
Any substance which occupies space and has mass is known as matter. States of matter: Matter exist in three different states that are Solid, Liquid and Gas. Matter is made up of very small particles
Explanation:
A gas has a volume of 465. mL at 725 mmHg of pressure. What
will be the pressure if the volume increases to 841 mL?
Answer:688
Explanation:
Find the hydroxide ion concentration [OH-] of an HCl solution with a pH of 6.93.
Answer:
[OH-] = 1.8 x 10^-7
Explanation:
pH + pOH = 14 --> 6.93 + pOH = 14 *subtract 6.93 from both sides
pOH = 7.07
-->
10^pH => 10^-6.93 => 1e - 6.93 [H+]
-->
H+ x OH- = 1 x 10^-6.93 *divide H+ from both sides
-->
[OH-] = 1.17 x 10^-7 or 1.8 x 10^-7
Which solenoid would be likely to pick up more paperclips? Use what you have learned about electromagnets and solenoids to explain your reasoning.
Answer:
Solenoid having iron core.
Explanation:
Solenoid having iron core will pick up more paperclips because this solenoid will produce more electromagnetism. Solenoid having no iron core produces lower magnetic field as compared to solenoid having iron core. The presence of iron in the core of solenoid increases magnetic field which leads to increase in electromagnetism so that's why the solenoid with iron core attract more paperclips as compared to no iron core solenoid.
What two things combine with oxygen to form ground-level ozone?
A) NOx and ODS
B) CFCs and halons
C) NOx and VOC
D) HFCs and HCFCs
Answer:
c) NOx and VOC
oxides of nitrogen (NOx) and volatile organic compounds (VOC)
Explanation:
-
Pressure is a direct result of collisions between gas particles and the walls of their container.
False
True
(True is correct)
Answer:
Yes, True is correct heheh :)
The given statement is true as pressure is a direct result of the collisions between gas particles and the walls of their container.
What is pressure?Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.
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Name the planet: Until recently, this stormy, blue-colored planet had a great dark spot on it, which was a high pressure cyclone.
Answer:
Explanation:
THE PLANET NAME IS NEPTUNE
So3+H2o→H2 So4
identify the nature of this reaction
helpp please i'm such a failure
THIS IS AN COMBINATION REACTION SO3 Combined with H2O to form Sulfuric acid.
When two or more reactants combine to form a single product such reactions are called as combination reaction.
Calcular la presión final de un gas que inicialmente está a 21°C y 0,98 atm. Sabiendo que su temperatura aumenta a 37°C.
Answer:
1.03 atm
Explanation:
Primero convertimos 21 °C y 37 °C a K:
21 °C + 273.16 = 294.16 K37 °C + 273.16 = 310.16 KUna vez tenemos las temperaturas absolutas, podemos resolver este problema usando la ley de Gay-Lussac:
T₁P₂ = T₂P₁En este caso:
T₁ = 294.16 KP₂ = ?T₂ = 310.16 KP₁ = 0.98 atmColocando los datos:
294.16 K * P₂ = 310.16 K * 0.98 atmY despejando P₂:
P₂ = 1.03 atm
What causes water to change state? Select the most correct answer.
A. Water changes state when it gains energy. B. Water changes state when it loses energy. C. Water changes state when it neither loses or gains energy.
D. Water changes state when it loses or gains energy.
Answer:
D. Water changes state when it loses or gains energy.
Explanation:
When water gains energy, it turns from ice to water, or water to gas. When water loses energy, it turns from gas to water, or water to ice.
Particles in the water move faster and create more energy when heated, and this causes them to spread wider apart and change. Particles slow down and move closer together when they get cold.
What is the percent yield of oxygen in this chemical reaction?
73.40%
To express the efficiency of a reaction, you can calculate the percent yield using this formula: %yield = (actual yield/theoretical yield) x 100.
2AgNO3 (aq) + BaCl2 (aq)
-->
2AgCl (s) + Ba(NO3)2 (aq)
2AgCl (s) + Ba(NO3)2 (aq)
How does the equilibrium change to counter the removal of A in this reaction? A + B ⇌ AB The equilibrium shifts left. Simultaneously, there's an increase in the reverse reaction.
Answer:
The increase in the reverse reaction
Explanation:
Based on the LeCh's principle, a change in the concentration of a species in the equilibrium will shift the concentrations of the other species in order to counteract the effect of this change.
For example, for the reaction:
A + B ⇌ AB
Remove A in this reaction will produce the increase in the reverse reaction in order to increase the concentration of A.