Answer:
13Explanation:
be critical thinkers
Consider the balanced equation below.
PCl3 +Cl2 → PC15
What is the mole ratio of PC13 to PCIS?
1:1
2:1
3.5
5:3
A. 1:1
Explanation:
hope this helps ya :)
According to the balanced equation below.
PCl₃ +Cl₂ → PCl₅
The mole ratio of PCl₃ to PCl₅ is 1:1.
What is a balanced reaction?Balancing of a reaction is done according to the "Law of conservation of mass" and balancing helps in solving stoichiometry questions correctly as if we will not balance the reaction then the quantitative results in a particular question doesn't come correctly.
Balancing of a reaction helps in mole concept as well and it is one of the laws of chemical reactions as well.
Some examples of balanced chemical reactions are-
2Mg(s) + O₂(g) ⟶ 2MgO(g)
Given reaction is,
PCl₃ +Cl₂ → PCl₅
Therefore, The mole ratio of PCl₃ to PCl₅ is 1:1.
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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 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:
-
What is the pH of a solution with a hydronium concentration of 0.36 M?
Answer:
0.44Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log [ { H_3O}^{+}][/tex]
From the question we have
[tex]pH = - log(0.36) \\ = 0.4436...[/tex]
We have the final answer as
0.44Hope this helps you
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 atmIf 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 :
A group of 6th-grade students constructs arguments on why water conservation is important. Which student argument is correct?
A.
Student 1 argues that people need water for recreation and transportation only.
B.
Student 2 argues that as the population increases in the world, so does the need for water.
C.
Student 4 argues that we use less water for agriculture and more on personal needs.
D.
Student 3 argues that there is an unlimited supply of water for animals, ecosystems, and people to use daily.
From a chemicals standpoint, Student 2 contends that as global population grows, so does the need for water. This is the correct reasoning.
What is the purpose of chemistry?
Our basic needs of food, clothes, shelter, health, energy, and pure air, water, and soil are all met by chemistry. Chemical technologies improve our quality of life in many ways by offering fresh approaches to issues with health, resources, and energy use.
What subjects are studied in chemistry?
The study of matter, including its properties, behaviours, and structures, is known as chemistry. Chemists induce and monitor these reactions both in nature and artificially in a lab setting because they are interested in how materials behave and react in specific settings.
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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:
Which of the following is NOT a function of the muscular system
Answer:
where are the answer choices
Explanation:
how did the sociaty treated edgardo gomez accomplishments?
Explanation:
He led the world's first national-scale assessment of damage to coral reefs leading to international conservation initiatives such as the replanting of corals. He also pioneered giant clam (Tridacna gigas) breeding stationed in Bolinao and other protective areas for coastal communities of the Philippines
what is the cation called?
Answer:
Explanation:
HYDRONIUM
Answer:
hydronium
Explanation:
:0
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 rate law for this reaction? A + 2B → C + D
rate = k[A][B]2
rate = k[A]2 [B]2
rate = k[A]2 [B]
rate = k[A][B]
thanks!!
Answer: A:
K(A)(B)2
Explanation: gradpoint
Which of the following wouldn't be a good tool to use when measuring pH values of solutions?
Question 8 options:
a)
litmus paper
b)
digital pH meter
c)
electrical conductivity meter
d)
pH paper
litmus paper
Because it will just tell if the solution is acidic or basic, it won't tell the pH
What type of reaction is
Ammonia (NH3) breaking down into nitrogen gas and hydrogen gas
Answer:
Explanation:
Look at the reaction.
2NH3 ===> N2 + 3H2
It's a molecule that is breaking down to two elements on the periodic table. We used to call such a thing as a simple decomposition.
Which of these is an energy source for chemosythesis? Sunlight Moonlight Carnivores Sulfur molecules
Answer:
Sulfur molecules
Explanation:
Chemosynthesis can be defined as the process of producing the energy rich nutrients molecules from the chemicals. The chemosynthesis bacteria are those bacteria that are capable of absorbing chemicals from the ocean floor like hydrogen sulfide.
Thus it is a process of making energy rich molecules using the chemical energies.
In the context, sulfur molecules are the sources of energy for the process of chemosynthesis.
what is the pH of the 1.0 M KOH solution?
Answer:
So... pH of the 1.0" 10-2 mol-1 KOH is.. = 122AgNO3 (aq) + BaCl2 (aq)
-->
2AgCl (s) + Ba(NO3)2 (aq)
2AgCl (s) + Ba(NO3)2 (aq)
PLEASE HELP DUE SOON
Describe one piece of evidence that supports the big bang theory.
Answer: Red-Shift
Explanation:
It suggests that the universe is expanding, as distant stars/galaxies must be in motion away from us to cause the light to shift towards the red end of the spectrum (or into longer wavelengths of the EM spectrum). This agrees with the Big bang theory as that suggests the universe is expanding.
What would make a conversion not possible?
if it is already as low as it can go
Answer:
you generally can't convert between units of mass and volume (e.g., grams to gallons).
Explanation: Examples of Conversion Factors Remember, the two values must represent the same quantity as each other. For example, it's possible to convert between two units of mass (e.g., grams to pounds),
A sample of gas is held at constant temperature. The gas is in a container with a moveable piston. The gas is
compressed into a small volume. What will happen to the pressure?
Answer:
The pressure of the gas will increase.
Explanation:
This concept of change in state properties of gas, when compressed in a moveable piston-cylinder assembly, can be explained by using Boyle's law
Boyle's law states that the pressure of a given mass of gas is inversely proportional to its volume given that temperature remains constant.
Following this law, when the gas in the container is compressed to a smaller volume, the pressure will go up.
This is also because the gas is not free to move about without frequent collisions with itself and the walls of the container, due to the resulting smaller space after compression. Therefore, the force it exerts on the walls of the container and the frequency of collision are more.
All atoms of a given element must contain the same number of
A) protons
B) neutrons
C) electrons plus neutrons
D) protons plus neutrons
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.
How many molecules are in 0.87 mole of carbon dioxide?
Answer:
1 moles Carbon Dioxide = 44.0095 gram using the molecular weight calculator and the molar mass of CO2
Explanation:
The molecules in 0.87 mole of carbon dioxide are 5.2 x 10²³.
What are moles?The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
If there are 6.023 × 10²³ molecules present in one mole of carbon dioxide then for 0.87 moles
[tex]6.023 \times 10^2^3 \times 0.87 = 5.2 \times 10^2^3[/tex]
Thus, the molecules in 0.87 mole of carbon dioxide are 5.2 x 10²³
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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.
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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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.
Fossil fuels are called nonrenewable resources because
A
they were made by dinosaurs, which are extinct.
B
it is impossible for humans to make more in our lifetimes.
с
they are easy to replace whenever they run out.
D
it is possible to use them for many different purposes
Answer:
The Answer is B
Explanation:
Fossil fuels take millions of years to be made, and every other answer doesn't make sense
Four balls have the same temperature. Which ball has the most Thermal Energy? A.Golf ball(45g) B.Basket ball(625g) C.Bowling ball(5000g) D.Tennis ball(60g)
Answer:
b
Explanation:
b. ,u play with the ball, handle the ball grab the ball throw the ball exc.
A 2.8 g sample of pure metal requires 10.1 J of energy to change its temperature from 21°C to 36°C. What is this metal? Substance Specific Heat Gold 0.129 J/g °C Silver 0.237 J/g °C Copper 0.385 J/g °C Water 4.18 J/g °C
Answer:
Silver 0.237 J/g °C
Explanation:
We know that the heat required to raise the temperature of a given mass of a substance through a given temperature rise is given by;
H = mcθ
Where;
m = mass of the body
c = specific heat capacity of the body
θ = temperature rise
10.1 J = 2.8 g * c * (36°C - 21°C)
c = 10.1 J / 2.8 g * (36°C - 21°C)
c = 0.24 J/g °C