Answers
Answer:
6.8 mole of O₂
Explanation:
Given expression:
2H₂ + O₂ → 2H₂O
Number of moles of H₂ = 13.6moles
Unknown:
Number of moles of O₂ = ?
Solution:
In the given problem, we are to find the number of moles of oxygen gas that will use up 13.6mole of hydrogen gas;
From the reaction equation;
2 mole of H₂ will completely react with 1 mole of O₂
13.6 moles of H₂ will completely be used up by [tex]\frac{13.6}{2}[/tex] mole of O₂
= 6.8 mole of O₂
Related Questions
10 g of copper is heated and the mass increases to 12.5 g. What is the mass of the copper in the new substances?
Answers
Answer:
10g
Explanation:
The amount of copper in the heated mass of the new substance produced is still 10g because in any chemical action, mass is always conserved.
According to the law of conservation of matter "matter is neither created nor destroyed in a chemical reaction". The change in mass is only due to oxygen gas that combines with the new copper formed or other substances that joined the mass. The substance will still have the same amount of copper as the original one. Since we started with 10g of copper, we end with 10g of copper.In an experiment conducted between oxygen and chlorine gas it was found that oxygen gas spread much faster than chlorine. What is the explanation for this observation?
Answers
Answer:
Because oxygen is lighter
Explanation:
Below is a phase diagram for Carbon Dioxide. Use this diagram to answer the following question.
In this example we will start the Carbon Dioxide out at a temperature of -20oC and 1 atm of pressure. If the pressure was raised to 100 atm of pressure while still staying at -20oC, what phases would the Carbon Dioxide change between?
Answers
Vapor to liquid is the same as saying gas to liquid, which I believe to be the correct answer.
how do i do the chemicals
Answers
you have to put them togeter
In your own words, please explain how to name acids.
Answers
Answer:
Acids are named based on their anion — the ion attached to the hydrogen. In simple binary acids, one ion is attached to hydrogen. Names for such acids consist of the prefix “hydro-“, the first syllable of the anion, and the suffix “-ic”. Complex acid compounds have oxygen in them.
The growth of a plant toward light is called _____.
phototropism
tropism
geotropism
Answers
It's called phototropism
Answer:
The answer is (Phototropism)
How many orbitals surround the nucleus in a neutral atom of sulfur (S)?
1
3
5
6
Answers
When you climb to the top of a water slide, you are gaining:
O A. gravitational kinetic energy.
B. chemical potential energy.
c. gravitational potential energy.
D. chemical kinetic energy.
Answers
Answer:
C
Explanation:
You climbing the water slide gives you potential energy and your building gravitational eneergy.
When we climb the top of a water slide we are gaining gravitational kinetic energy. That is we are moving through the surface and thus we experience both kinetic energy and gravitational energy.
What is kinetic energy?Kinetic energy of a body is generated by virtue of its motion. Gravitational energy is a form of energy by which the an object attracts other object to its center of mass. Both forms of energy are directly proportional to the mass of the object.
Potential energy is generated by virtue of the position and height of the object. As the height from surface increases, potential energy increases. Potential energy and kinetic energy together called as mechanical energy of an object.
When starts moving our potential energy is converting to kinetic energy. Hence, when we climb the top of a water slide kinetic energy starts to increase. Thus, option A is correct.
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A wave is a _____that transfers _____ through a ______
A.) medium, disturbance, energy
B.) disturbance, energy, medium
C.) energy, disturbance, medium
D.)disturbance, medium, energy
Answers
A wave is a disturbance that transfers energy through a medium. There
are types of such as sound and light waves.
A wave involves the transfer of energy such as sound, light waves etc
through a medium. The medium could be through liquids , solids or air and
they have characteristic waves which pass through them.
When a wave transfers energy through a medium, the matter involved
doesn't experience any type of movement.
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Question 14
1 pts
How many moles of NaCl could be found in 0.4 L of a 0.9 M solution? Round your answer to
two decimal places.
Answers
Answer:
0.36mol
Explanation:
Given parameters:
Volume of NaCl = 0.4L
Molarity = 0.9M
Unknown:
Number of moles = ?
Solution:
To find the number of moles, the molarity of a solution is the amount of solute contained in a solution.
Molarity = [tex]\frac{number of moles}{volume}[/tex]
Number of moles = molarity x volume
Insert the parameters and solve;
Number of moles = 0.4 x 0.9 = 0.36mol
Which models of the atom does the experimental evidence from Bohr's hydrogen experiment support? Explain why these models are compatible with the experimental results.
The models are Daltons, Thompsons, and Rutherfords
Answers
Answer:
Rutherfords
Explanation:
The model of the atom supported by Bohr's hydrogen experiment is the Rutherford's model of the atom.
Rutherford through his experiment on gold foil suggested the atomic model of the atom. The model posits that an atom has a small positively charged center(nucleus) where nearly all the mass is concentrated.
Surrounding the nucleus is the large space containing electrons. In the Bohr's model of the atom, he suggested that the extranuclear space of the atom is made up of electrons in specific spherical orbits around the nucleus.Potato strips placed in a container of concentrated salt water will ultimately __.
Answers
Answer:
00000
Explanation:
3. Does the siren of a moving police car seem to change pitch to the
police officers inside the car? Why or why not?
Answers
Answer:
As the police car moves towards them, the pitch of the police car's siren goes up because the sound waves get closer together in front of the police car. When the police car moves away from the person, the pitch goes down because the waves spread out behind the police and that makes the frequency go down.
Explanation:
how can you test a sample of soil for acidity or alkalinity
Answers
Answer:
Scoop a soil sample into a fresh container, add 1/2 cup of water, and mix. Then, add 1/2 cup of baking soda. If the soil bubbles or fizzes, the soil is acidic. The reaction you're seeing is the result of acidic soil coming into contact with an alkaline substance (baking soda).
Explanation:
Hope this helped!
PLEASE HELP!!!!!!!!
Step 4: Create Lewis dot diagrams.
a) Draw Lewis dot diagrams of the reactants and products on the paper with your chemical equation.
b) Select a different color to use for each element in the chemical reaction. Use your chosen color
for the element’s symbol and for its valence electrons.
c) Label these diagrams “Lewis Dot Diagrams.”
Answers
Answer:
Hey student your question is not proper arrange, i don't understand what you want us to do
When the following equation is balanced, what is the coefficiant for Br?
___I2 +___NaBr rightwards arrow___NaI +_?_Br2
A.
6
B.
3
C.
1
D.
2
1 points
QUESTION 10
The previous question is an example of what type of chemical reaction?
A.
Synthesis
B.
Decomposition
C.
Single Re-Placement
D.
Double Re-Placement
Answers
Answer:
1. A 2. C
Explanation:
because it just is
Please help i will give brainliest
Answers
According to the periodic table, the neutral atom of what element has 4
protons, 5 neutrons, and 4 electrons?
Answers
Answer:
Beryllium
Explanation:
Given parameters:
Number of protons = 4
Number of neutrons = 5
Number of electrons = 4
Unknown:
Element = ?
Solution:
To determine an element, the atomic number is the most important identifier.
The atomic number is the number of protons in an atom.
Since the atom here has a proton number of 4, checking on the periodic table, it is Beryllium, Be
Write the electron configuration for the electrons identified by the following quantum numbers:
a) 2, 1, 0, -½
b) 4, 2, 0, -½
c) 5, 3, 2, -½
Thanks!
Answers
Answer:
see the answer at the pic
The electron configuration for the electrons as listed are:
a) 1s² 2s² 2p⁵ = 9X
b) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d⁸ = 46 X
c) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴
Using the quantum numbers of the identified electrons to derive the electron configuration ( the representation of the distribution of electrons in the orbit of an atom ) electron configuration of electrons can be calculated using the formula :2n².
where n = orbit number and the various energy levels are represented as 1,2,3,4... while shells of the an atom is written as K,L,M,N
hence the electron configuration of the electrons identified by the quantum numbers are as written above.
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1.Which statement(s) is/are true about a divergent plate boundary? Check all that apply.
A.new crust is created here
B.an ocean trench is found here
C.a rift valley is associated with this boundary
D.subduction occurs at this boundary
E.a mid-ocean ridge is found at this boundary
F.San Andreas is an example of this type of boundary
G.sea floor spreading occurs here
--------------------------------------------------------------------------------------------------------------------------------
2.Which statement(s) is/are true about a transform plate boundary? Check all that apply.
A.an ocean trench is found here
B.earthquakes frequent this boundary
C.subduction occurs at this boundary
D.two plates are sliding past each other
E.San Andreas is an example of this type of boundary
F.an ocean trench is found here
--------------------------------------------------------------------------------------------------------------------------------
3.Which statement(s) is/are true about a convergent plate boundary? Check all that apply.
an ocean trench is found here
a rift valley is associated with this boundary
subduction occurs at this boundary
volcanic island chain might occur here
folded mountains might form here
earthquakes might occur here
San Andreas is an example of this type of boundary
--------------------------------------------------------------------------------------------------------------------------------
SINCE THIS IS ALOT OF THINKING I AM GIVING A GOOD AMOUT OF POINTS.....
PLEASE DONT SCAM AND STEAL THE POINTS
Answers
Answer:
I know the first one is c or e but i not sure what the others are, the second one is- wait are you sure your in 6th grade lol? I dont remember learning this
Answer:
OMG ITS MEHH
Explanation:
Why should a hypothesis be testable?
A. It must be testable in order to be found true or false.
B. It must be testable for the outcome to be predictable.
C. It must be testable for other scientists to consider it reliable.
D. It must be testable if it is to become a scientific theory.
Answers
I WILL GIVE BRANLIEST What factor is the temperature in an ecosystem? Abiotic or Biotic?
Answers
“ temperature is an abiotic factor with an ecosystem abiotic factors are the parts of an ecosystem that are nonliving such as weather and temperature”
Answer:abiotic .
Explanation:
Question 4 of 10
What is the molarity of a solution of 3 moles (mol) of FeBr3 in 1/2 L water?
A.
3 mol/2L
B.
2L/3 mol
C.
0.5L/3 mol
D.
3 mol/0.5 L
SUBMIT
Answers
Answer:
B
Explanation:
Answer:
D. 3 mol/0.5 L
Explanation:
Just took the quiz
please help me..........
Answers
Answer:
4/6
6/9
8/12
Explanation:
What is Jadi? is it goat? what language is Jadi?
How much heat is required to raise the temperature of a 6.21 g sample of iron from 25.0 oC to 79.8 oC?
Answers
Answer:
151.1J
Explanation:
Given parameters:
Mass of iron = 6.21g
Initial temperature of iron = 25°C
Final temperature of iron = 79.8°C
Unknown:
Amount of heat = ?
Solution:
The amount of heat require to cause this temperature can be determined using the expression below;
H = m c (T₂ - T₁)
H is the amount of heat
m is the mass
c is the specific heat capacity
T is the temperature
Specific heat capacity of iron 0.444J/g°C
Insert the parameters and solve;
H = 6.21 x 0.444 x (79.8 - 25)
H = 151.1J
how is a solute and a solvent different
Answers
what is the density of a 100g piece of titanium if a 10g piece of titanium has a density of 4.506g/cm3?
Possible answers:
A: 45.06g/cm3
B:4.506g/cm3
C: 9.1g/cm3
D: 91g/cm3
Answers
Answer:
B. Density stays the same no matter how much of a substance there is.
Explanation:
Density of the substance is the same and it is the measure of its mass per unit volume. Thus, the mass of titanium per 1 cm³ is 4.506 g which is the same for 10 g, 100 g or whatever the mass.
What is density ?Density of a substance is the measure of its mass per unit volume. It describes how closely its particles are packed. Density of an object depends on its bond type, temperature and pressure.
The more denser the object is , more will be its mass distribution per unit volume. Substances denser than water will sink on it otherwise they float on water.
Density is constant for a substance, the distribution of given mass per unit volume is same for all masses. Hence, the density of 100 g Ti is same as that of 10 g. i.e., 4.56 g/cm³.
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PLEASE HELP ME !!!!!!!
Answers
Answer:
it would be 5,045
Explanation:
because it is closer to 5,000. pls correct me if wrong
How are elements and compounds a part of our daily lives?
Answers
Answer:
Aluminium (A1) -Used in the production of duralumin alloy for use in the construction of aeroplane bodies. 3. Silicon (Si) -To make microchips 4. Sulphur (S) -To make matches, fireworks and for the manufacture of sulphuric acid 5.
Explanation:
Hope this helped!
Answer:
yes
Explanation:
we use different elements and compounds in our life ex salt and iron but most of the substances found in our environment are mixture btw scientists need to classified substances to work with our substances and to study pure substances hope it helps u
2. What properties do all acids have?
3. Why should you never use taste as a method for testing an unknown substance?
4. What is used to detect the presence of acids?
10. What can you use to detect the presence of a base?
11. What are some common bases that we use every day?
12. How does an antacid help reduce heartburn?
13. What happens when acid and base are mixed
14. What is used to determine the pH of a substance?
15. Describe how the pH scale works. In other words, what is it actually measuring?
17. Why is pH important to our environment?
18. Describe how salt is formed.
Pls help!!!!!
Answers
3. You should NEVER taste unknown chemicals because many are poisonous and can destroy body tissue.
4. Most often dyes are used to detect acids. The dyes will turn a certain color which indicates the presence of an acid.
10. You can use litmus to detect wether a solution is a base or an acid.
11. The most common bases I can think of would be: baking soda, laundry detergent, or soaps.
12. Antacids work by neutralizing the acids in your stomach.
13. When an acid and base are mixed together, they produce a salt.
14. Normally pH meters are used, but you can also calculate the pH using math. (yuck)
15. The pH scale measures how acidic or basic a substance is. It ranges from 0-14, with 7 being neutral.
17. pH is very important to the environment as it helps us measure and monitor for safe water conditions. A rise or fall from the average water pH level can indicate chemical pollution.
18. Salt is formed when an acid and base react with each other. It then has a cation of the base, and anion of the acid.
I hope those helps!! (: